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1 Traffic Measurement
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2003353
Nokia BSC/TCSM S11.5 ProductDocumentation
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The information in this documentation is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This documentation is intended for theuse of Nokia's customers only for the purposes of the agreement under which the documentationis submitted, and no part of it may be reproduced or transmitted in any form or means without theprior written permission of Nokia. The documentation has been prepared to be used byprofessional and properly trained personnel, and the customer assumes full responsibility whenusing it. Nokia welcomes customer comments as part of the process of continuous developmentand improvement of the documentation.
The information or statements given in this documentation concerning the suitability, capacity, or performance of the mentioned hardware or software products cannot be considered binding butshall be defined in the agreement made between Nokia and the customer. However, Nokia hasmade all reasonable efforts to ensure that the instructions contained in the documentation areadequate and free of material errors and omissions. Nokia will, if necessary, explain issueswhich may not be covered by the documentation.
Nokia's liability for any errors in the documentation is limited to the documentary correction of errors. NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THISDOCUMENTATION OR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL(INCLUDING MONETARY LOSSES), that might arise from the use of this documentation or the
information in it.
This documentation and the product it describes are considered protected by copyrightaccording to the applicable laws.
NOKIA logo is a registered trademark of Nokia Corporation.
Other product names mentioned in this documentation may be trademarks of their respectivecompanies, and they are mentioned for identification purposes only.
Copyright © Nokia Corporation 2005. All rights reserved.
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Contents
Contents 3
List of tables 4
List of figures 5
Summary of changes 9
1 1 Traffic Measurement 11
2 Counters of Traffic Measurement 25
3 Signalling charts of Traffic Measurement 135
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Contents
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List of tables
Table 1. Measurement description of Traffic Measurement 11
Table 2. SDCCH attempts counters 11
Table 3. SDCCH success counters 12
Table 4. SDCCH failure counters 12
Table 5. TCH requests and attempts counters 13
Table 6. TCH success counters 15
Table 7. TCH failure counters 17
Table 8. Other counters 20
Table 9. GPRS counters 21
Table 10. Spare counters 22
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List of figures
Figure 1. Basic call without counters. 136
Figure 2. Basic call with counters. 137
Figure 3. Basic call with priority subscriber. 138
Figure 4. FACCH call setup due to SDCCH congestion without counters. 139
Figure 5. FACCH call setup due to SDCCH congestion with counters. 140
Figure 6. FACCH call setup due to SDCCH congestion, no free TCH channel.Optional software directed retry is not activated. 141
Figure 7. Normal release. 142
Figure 8. Basic call, no free TCH and queuing or directed retry is not allowed. 143
Figure 9. Successful TCH queuing. 144
Figure 10. Basic call, no free TCHs, unsuccessful queuing and directed retry notactivated. 145
Figure 11. TCH assignment failure with cause switch_circuit_pool , queuing anddirected retry not allowed. 146
Figure 12. Unsuccessful TCH activation. 147
Figure 13. Unsuccessful TCH activation, t imer expires while waiting for CHANNEL_ACTIVATION_ACK message. 148
Figure 14. TCH assignment failure. 149
Figure 15. TCH assignment failure, MSC sends CLEAR_COMMAND message. 150
Figure 16. CONNECTION_FAILURE message with cause transcoder_failure duringa call. 151
Figure 17. TRX or TSL is blocked with different causes during a call. 152
Figure 18. SDCCH congestion, FACCH call setup is not activated. 153
Figure 19. Unsuccessful SDCCH activation. 154
Figure 20. Unsuccessful SDCCH activation, timer expires while waiting for CHANNEL_ACTIVATION_ACK message. 155
Figure 21. Connection failure during SDCCH assignment. 156
Figure 22. SDCCH assignment failure. 157
Figure 23. Unsuccessful SDCCH activation, timer expires while waiting for PHYSICAL_CONTEXT_CONFIRM message. 158
Figure 24. TRX/TSL is blocked with different causes during an SDCCH channel
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activation. 159
Figure 25. Successful trunk reservation. Counters updated: 001040, 001041 andbasic call counters, see Figure 2. 160
Figure 26. Unsuccessful trunk reservation. 161
Figure 27. Successful internal intra-cell handover. Counters 001090 and 001091 areupdated only with underlay overlay handover. 162
Figure 28. Internal intra-cell HO, successful TCH queuing. 163
Figure 29. Unsuccessful internal intra-cell handover, timer expires while waiting for CHANNEL_ACTIVATION_ACK message. 165
Figure 30. Unsuccessful internal intra-cell handover, CONNECTION_FAILUREmessage with cause remote_transcoder_failure comes to the targetchannel. 166
Figure 31. Unsuccessful internal intra-cell handover, timer expires on the sourcechannel, call cleared. 167
Figure 32. Unsuccessful underlay overlay internal intra-cell handover, queuing notallowed. 168
Figure 33. Internal intra-cell handover, unsuccessful TCH queuing. 169
Figure 34. Internal directed retry. 171
Figure 35. Successful internal inter-cell handover. 172
Figure 36. Unsuccessful internal inter-cell handover. 173
Figure 37. Successful external handover, target. 174
Figure 38. Successful external handover, source. 175
Figure 39. Unsuccessful external handover, source BSC, timer expires while waitingfor CLEAR_COMMAND message. 176
Figure 40. Unsuccessful external handover, MS sends a handover failure. 177
Figure 41. Successful traffic reason handover, source. 178
Figure 42. Successful SDCCH internal intra-cell handover. 179
Figure 43. Unsuccessful SDCCH internal intra-cell handover, timer expires whilewaiting for CHANNEL_ACTIVATION_ACK message. 180
Figure 44. Unsuccessful SDCCH internal intra-cell handover, unsuccessful channelactivation. 181
Figure 45. U n s u c c e s s f u l S D C C H i n t e r n a l i n t r a - c e l l h a n d o v e r ,CONNECTION_FAILURE message comes to the target channelduring handover. 182
Figure 46. Successful SDCCH internal inter-cell handover. 183
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Figure 47. Unsuccessful SDCCH internal inter-cell handover, BTS sendsCONNECTION_FAILURE message. 184
Figure 48. Successful SDCCH external handover target. 185
Figure 49. Successful SDCCH external handover source. No counters updating. 185
Figure 50. Unsuccessful SDCCH external handover, timer expires while waiting for CLEAR_COMMAND message. 186
Figure 51. Successful forced release. 187
Figure 52. Unsuccessful forced release. 188
Figure 53. Unsuccessful forced release with external handover. 189
Figure 54. Successful forced handover. 190
Figure 55. Unsuccessful forced handover. 191
Figure 56. Unsuccessful forced handover with external handover. 192
Figure 57. Reconfiguration from TCH to SDCCH. 193
Figure 58. Normal call. 194
Figure 59. Mobile originated HSCSD call setup. 195
Figure 60. Successful internal inter-cell handover for HSCSD, target cell allocationsand activations for three channels. 196
Figure 61. A CONNECTION_FAILURE message which comes during an
HSCSD. 197
Figure 62. Internal intra-cell direct access from a regular DCCH to the super-reuseTRX. Optional software direct access to super-reuse TRX in IUOactivated. 198
Figure 63. Unsuccessful internal intra-cell direct access from regular DCCH to thesuper-reuse TRX due to lack of resources. Optional software directaccess to super-reuse TRX in IUO activated. 199
Figure 64. Timer T3107 expires while waiting for ASSIGNMENT_COMPLETEmessage. 200
Figure 65. Average counter updating. 201Figure 66. Basic call. Optional software dynamic hotspot is activated. 201
Figure 67. Successful handover due to DADL/B. 202
Figure 68. Unsuccessful DADL/B handover due to lack of resources. 202
Figure 69. Successful BSC controlled TRHO. 203
Figure 70. Unsuccessful BSC controlled TRHO. 203
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Summary of changes
Summary of changes
Changes between document issues are cumulative. Therefore, the latest document
issue contains all changes made to previous issues.
Changes made between issues 9 and 8 1
New counters 001204 001230 have been added.
Description of the counter number 001003 has been updated.
Counters number 001149 and 001194 have been modified.
Measurement description table has been added.
The name of the document and of Chapter 1 has been changed from BSC
Counters: Traffic Measurement to 1 Traffic Measurement.
The document has been revised throughout to comply with the latest
documentation standards.
Changes made between issues 8 1 and 8
2. Counters
Information updated for counters 001015 and 001088.
Changes made between issues 8 and 7
1. Introduction
The link targets updated.
The new counters 001195 - 001203 added to the counter lists.
2. Counters
The cell titles in the tables updated to conform with the S11 release.
The following new counters added: 001195-001203.
The description of counters 001011, 001013, 001191 - 001194 changed.
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1 1 Traffic Measurement
The BSC traffic measurement registers information related to the stand alone
dedicated control channel (SDCCH) and traffic channels (TCH). The BSC traffic
measurement counters are divided into seven different classes. There are
measurements regarding the number of attempts to seize TCHs and SDCCHs,
successful calls, lengths of the queue, and the reasons for failures. This
measurement collects one set of results for each cell. Signalling charts are drawnwith the accuracy of message interface.
Measurement description
Table 1. Measurement description of Traffic Measurement
Measurement
Measurement ID
Measurement abbreviation
Traffic Measurement
1
TRAFFIC
Product BSC
Product software release S1
Target name BTS
Measurement counters
. SDCCH attempts counters
Table 2. SDCCH attempts counters
Counter Counter number
Seizure attempts 001000
SDCCH seizure attempts for MOC 001135
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Table 2. SDCCH attempts counters (cont.)
Counter Counter number
SDCCH seizure attempts for MTC 001136
Dynamic SDCCH reconfiguration attempt 001154
. SDCCH success counters
Table 3. SDCCH success counters
Counter Counter number
Success seizure for HO 001006
Success seizure for immediate assignment 001007
. SDCCH failure counters
Table 4. SDCCH failure counters
Counter Counter number
Seizure attempts with busy SDCCH 001001
Transactions failed due to BSS failure 001002
Transactions failed due to radio failure 001003
Transact. failed due radio on source channel during
HO
001004
Transact. failed due radio on target channel during
HO
001005
SDCCH activation failure 001027
SDCCH Abis problems 001033
SDCCH A interface problems 001034
SDCCH LAPD failure 001035
SDCCH BTS failure 001036
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Table 4. SDCCH failure counters (cont.)
Counter Counter number
SDCCH user actions 001037
SDCCH BCSU reset 001038
SDCCH network actions 001039
SDCCH activation failure call 001072
SDCCH activation failure target 001074
SDCCH Abis failure call 001075
SDCCH Abis failure source 001076
SDCCH Abis failure target 001077
SDCCH A interface failure call 001078
SDCCH A interface failure source 001079
SDCCH A interface failure target 001080
Unsuccess immediate assignment SDCCH attempt 001155
SDCCH failures in phase 3 001201
Error indication messages during Location Update 001203
. TCH requests and attempts counters
Table 5. TCH requests and attempts counters
Counter Counter number
TCH request success and unsuccess 001010
Call attempts in the queue 001016
Handover attempts in the queue 001017
TCH call request 001026
Trunk reservation invocations 001040
TCH requests FACCH call setup 001043
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Table 5. TCH requests and attempts counters (cont.)
Counter Counter number
Traffic reason HO requests 001052
Traffic reason HO enquiries 001053
Forced release assign request attempts 001054
Forced HO assign request attempts 001055
Queuing allowed assign request attempts 001056
Queuing not allowed assign request attempts 001057
Forced release HO request attempts 001062
Forced HO HO request attempts 001063
Queuing allowed HO request attempts 001064
Queuing not allowed HO request attempts 001065
TCH requests underlay overlay 001090
TCH seizure underlay overlay 001091
Priority subscriber TCH requests 001095
TCH seizure attempt due SDCCH congestion 001098
Full TCH requests success unsuccess 001102
Half TCH requests success unsuccess 001103
TCH requests full preferred 001104
TCH requests half preferred 001105
Full TCH requests FACCH call 001123
TCH FACCH call channel rate not defined 001124
TCH seizure attempts for MOC 001137
TCH seizure attempts for MTC 001138
Queued urgent handover attempts 001142
TCH requests for 14.4k data calls 001156
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Table 5. TCH requests and attempts counters (cont.)
Counter Counter number
HSCSD transparent TCH request 001158
HSCSD request for call setup 001160
HSCSD TCH request for HO 001161
TCH request for a BSC controlled TRHO procedure 001167
DADLB start due to exceeded load 001172
TCH requests for AMR call 001184
TCH requests for 9.6k data calls 001189
HO commands in outgoing MSC-controlled handover 001195
HO or assignment commands in outgoing BSC
controlled handover
001196
Assignment commands in intra-BTS handover 001197
. TCH success counters
Table 6. TCH success counters
Counter Counter number
Success TCH seizure for HO 001008
Success TCH seizure for normal assignment 001009
Success trunk reservation invocations 001041
TCH seizure FACCH call setup 001044
Forced releases 001070
Forced handovers 001071
Priority subscriber success TCH seizure 001096
TCH seizure due SDCCH congestion 001099
Success full TCH seizure 001106
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Table 6. TCH success counters (cont.)
Counter Counter number
Success half TCH seizure 001107
Full TCH seizure speech ver 1 001108
Full TCH seizure speech ver 2 001109
Full TCH seizure speech ver 3 001110
Half TCH seizure speech ver 1 001111
Half TCH seizure speech ver 2 001112
Half TCH seizure speech ver 3 001113
Full TCH seizure normal assignment 001114
Half TCH seizure normal assignment 001115
Full TCH seizure internal HO channel rate 001116
Half TCH seizure internal HO channel rate 001117
Success full TCH seizure FACCH call 001125
Success half TCH seizure FACCH call 001126
MS success TCH seizure for assignment complete 001148
Calls ended by user during DADL/B setup 001149
Success TCH seizure when good quality in adjacents 001150
Succ TCH seiz when qual betw good and bad in adj 001152
HSCSD success TCH seizure with 14.4 001157
HSCSD success transparent TCH seizure 001159
HSCSD success TCH seizure for call setup 001162
HSCSD success TCH seizure for HO 001163
Success TCH seizure for direct access 001165
Succ TCH seiz for a controlled TRHO 001168
Successful TCH seizures for DADLB HO 001170
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Table 6. TCH success counters (cont.)
Counter Counter number
Removal from queue due to DR 001173
Successful FR TCH seizures with AMR codecs for
HO
001182
Successful HR TCH seizures with AMR codecs for
HO
001183
. TCH failure counters
Table 7. TCH failure counters
Counter Counter number
TCH request rejected due to lack 001011
Transactions ended due to BSS problem 001012
Transactions ended due to radio failure 001013
Transact. ended due source channel failure during
HO
001014
Transact. ended due target channel failure during HO 001015
Not served queued call attempts 001024
Not served queued HO attempts 001025
TCH activation failure 001028
TCH transcoder failure 001029
TCH transcoder failure source 001030
TCH transcoder failure target 001031
Trunk reservation invocations result refused 001042
TCH Abis problems 001045
TCH LAPD failure 001046
TCH BTS failure 001047
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Table 7. TCH failure counters (cont.)
Counter Counter number
TCH user actions 001048
TCH BCSU reset 001049
TCH network actions 001050
TCH A interface problems 001051
Forced release assign request failed 001058
Forced HO assign request failed 001059
Queuing allowed assign request failed 001060
Queuing not allowed assign request failed 001061
Forced release HO request failed 001066
Forced HO HO request failed 001067
Queuing allowed HO request failed 001068
Queuing not allowed HO request failed 001069
TCH activation failure call 001081
TCH activation failure target 001083
TCH Abis failure call 001084
TCH Abis failure source 001085
TCH Abis failure target 001086
TCH A interface failure call 001087
TCH A interface failure source 001088
TCH A interface failure target 001089
TCH rejected requests underlay overlay 001092
Non-priority subscriber refused TCH requests 001097
Trunk TCH rejected FR requests 001100
Trunk TCH rejected HR requests 001101
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Table 7. TCH failure counters (cont.)
Counter Counter number
Rejected TCH requests due lack FR 001118
Rejected TCH requests due lack HR 001119
Full TCH rejected requests due HR traff ic 001120
Half TCH rejected requests due FR traff ic 001121
TCH rejected due requested channel A interface
circuit
001122
Ended due transcoder FR rate 1 001127
Ended due transcoder FR rate 2 001128
Ended due transcoder FR rate 3 001129
Ended due transcoder HR rate 1 001130
Ended due transcoder HR rate 2 001131
Ended due transcoder HR rate 3 001132
Full TCH transaction failures 001133
Half TCH transaction failures 001134
TCH release due to radio failure 001139
TCH release due to BSS failure 001140
TCH seizure failure due to congestion 001141
Queued urgent HO attempts not served 001147
TCH request rejected due to bad quality in adjacents 001151
TCH req rej when qual betw good and bad in adj 001153
HSCSD connection releases due to failure 001164
TCH request for direct access rejected due to lack 001166
Rej TCH seiz for BSC contr TRHO due lack of res 001169
TCH request in DADLB HO rejected 001171
TCH drop due to too low RX level 001194
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Table 7. TCH failure counters (cont.)
Counter Counter number
TCH releases due to radio failures, updated in phases
9-11
001198
TCH releases due to BSS failures, updated in phases
2-3
001199
TCH releases due to BSS failures, updated in phases
9-11
001200
Dropped calls after TCH assignment 001202
Number of TCH drops between Assignment Complete
and RF Channel Release messages
001204
Number of TCH releases due to radio failures,
updated only in phases 2-3
001205
Number of TCH releases due to radio failures,
updated only in phases 12-14
001206
Number of TCH releases due to BSS failures,
updated only in phases 12-14
001207
Number of TCH requests rejected due to the
mismatch between the types of the requested channel
and the A interface circuit, updated only in call setupphase
001208
Number of TCH releases due to BSC-BSC conflict in
call setup
001211
Number of TCH releases due to BSC-BSC conflict for
target channel
001212
. Other counters
Table 8. Other counters
Counter Counter number
Average queue length for channel seizure request 001018
Queue denominator 1 001019
Average queue time of call attempts 001020
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Table 8. Other counters (cont.)
Counter Counter number
Queue denominator 2 001021
Average queue time of HO attempts 001022
Queue denominator 3 001023
Not relevant 001032
Not relevant 001073
Not relevant 001082
Successful MOC test call 001093
Unsuccessful MOC test call 001094
Average queuing time of urgent HO attempts 001143
Queue denominator 4 001144
Average queuing time of non-urgent HO attempts 001145
Queue denominator 5 001146
Successful AMR codec set downgrades 001185
Unsuccessful AMR codec set downgrades 001186
Successful AMR codec set upgrades 001187
Unsuccessful AMR codec set upgrades 001188
. GPRS counters
Table 9. GPRS counters
Counter Counter number
GPRS territory upgrade requests 001174
Incompletely served GPRS territory upgrade requests 001175
GPRS upgrade requests rejected due to CSW traffic 001176
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Table 9. GPRS counters (cont.)
Counter Counter number
GPRS upgrade requests rejected due to lack of PSW 001177
GPRS upgrade requests rejected due to to lack of
PCU
001178
GPRS downgrades due to increase in CSW traffic 001179
GPRS upgrades due to decrease in CSW traffic 001180
GPRS territory downgrade requests 001181
GPRS territory downgrade rejected due to streaming
traffic
001209
GPRS territory downgrade rejected due to need of
CS resources.
001210
Number of GPRS territory upgrade requestes from
CSW
001213
Number of GPRS territory upgrade requests from
CSW, partially successful
001214
Number of GPRS territory upgrade requests from
CSW, failed
011215
. Spare counters
Table 10. Spare counters
Counter Counter number
Spare001191 001191
Spare001192 001192
Spare001193 001193
Spare001216 001216
Spare001217 001217
Spare001218 001218
Spare001219 001219
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Table 10. Spare counters (cont.)
Counter Counter number
Spare001220 001220
Spare001221 001221
Spare001222 001222
Spare001223 001223
Spare001224 001224
Spare001225 001225
Spare001226 001226
Spare001227 001227
Spare001228 001228
Spare001229 001229
Spare001230 001230
Related topics
. Counters of Traffic Measurement
. Signalling Charts of Traffic Measurement
. Activating and Testing BSS7057: Direct Access to Super re-use TRX
. Activating and Testing BSS8123: Advanced Multilayer Handling
. BSC Statistics Administration
. BSC Measurement Counters Displaying Program (FOXMEA)
. Performance Measurements
. Direct Access to Desired Layer/Band
. Directed Retry in BSC
. Dynamic Hotspot
. Dynamic SDCCH in Radio Channel Allocation
. (E)GPRS in BSC
. Enhanced Coverage by Frequency Hopping
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. Enhanced Speech Codecs: AMR and EFR
. Extended Cell Range
.
Half Rate in BSC . Handover Support for Coverage Enhancements
. HSCSD and 14.4 kbit/s Data Services in BSC
. Intelligent Underlay-Overlay
. Multi BCF Control in BSC
. Traffic Reason Handover in BSC
. Trunk Reservation
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2 Counters of Traffic Measurement
Number
Name
Release
001000
SEIZURE ATTEMPTS
S1
Trigger points See figures:
. Basic call with counters
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion, no free TCH
channel
. SDCCH congestion, FACCH call setup is not activated
. Successful SDCCH internal intra-cell handover
. Successful SDCCH internal inter-cell handover
. Successful SDCCH external handover target
. Reconfiguration from TCH to SDCCH
Description Number of times when an MS attempts to seize an SDCCH.
Updated When the RRM receives requests for SDCCH from an MS as the MS
needs a channel for either a call or a HO.
Number
Name
Release
001001
SEIZURE ATTEMPTS WITH BUSY SDCCH
S1
Trigger points See figures:
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion
. SDCCH congestion, FACCH call setup is not activated
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Number
Name
Release
001001
SEIZURE ATTEMPTS WITH BUSY SDCCH
S1
Description Number of times when an MS attempts to seize an SDCCH but the
attempt is unsuccessful because all SDCCHs are busy. This counter
does not necessarily mean that the call attempt is lost, because the
call may be established as an FACCH call setup using TCH instead of
SDCCH. This counter is not triggered when the TCH reconfiguration
is attempted because of dynamic SDCCH allocation. If the attempt
fails, the SDCCH_busy_attempt is triggered together with 1155
UNSUCC_IMM_ASS_SDCCH_ATTEMPT.
Updated When the RRM has no SDCCHs to allocate for a call or HO attempts.
Number
Name
Release
001002
TRANSACTIONS FAIL DUE TO BSS FAIL
S1
Trigger points See figures:
. Unsuccessful SDCCH activation
. SDCCH assignment failure
. Unsuccessful SDCCH activation
. TRX/TSL is blocked with different causes during an SDCCH
channel activation
. Unsuccessful SDCCH internal intra-cell handover
. Unsuccessful SDCCH external handover
Description Number of SDCCH transactions ended because of a BSS failure.
Updated When one of the counters 001033, 001034, 001035, or 001036 is
updated. This counter represents their sum.
Impact See field descriptions of the counters 001033, 001034, 001035, and
001036.
Number
Name
Release
001003
TRANSACTIONS FAIL DUE TO RADIO FAIL
S1
Trigger points See figures:
. TCH assignment failure
. Connection failure during SDCCH assignment
Description Number of SDCCH transactions ended because of a radio failure.
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Number
Name
Release
001003
TRANSACTIONS FAIL DUE TO RADIO FAIL
S1
Updated When an SDCCH transaction ends because of a radio failure (radio
link timeout) and the RRM releases the SDCCH.
Impact Call cleared
Reason for the impact External / Abis Interface
Number
Name
Release
001004
TRANSACTIONS FAIL DUE RADIO ON SOURCE
CHANNEL DURING HO
S1
Trigger points See figure Unsuccessful SDCCH internal inter-cell handover
Description Number of SDCCH transactions ended because of a radio failure on
the source channel during a handover between SDCCH-SDCCH or
SDCCH-TCH.
Updated When an SDCCH transaction ends because of a radio failure (HO
failure) on the source channel during a handover attempt and the
RRM releases the SDCCH.
Dependencies with other
counters/PI(s)
It is this counter in the source cell that is updated. If the target cell lies
within the same BSC, also counter 001005 in the target cell is updated
along with this counter.
Impact HO failure and call cleared
Number
Name
Release
001005
TRANSACTIONS FAIL DUE RADIO ON TARGET CHANNEL
DURING HO
S1
Trigger points See figure Unsuccessful SDCCH internal intra-cell handover
Description Number of SDCCH transactions ended because of a radio failure on
the target channel during an SDCCH HO.
Updated When an SDCCH transaction ends because of a radio failure on the
target channel during a handover attempt and the RRM releases the
SDCCH.
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Number
Name
Release
001005
TRANSACTIONS FAIL DUE RADIO ON TARGET CHANNEL
DURING HO
S1
Impact HO failure, the call may possibly be cleared
Reason for the impact Since the MS cannot access the target channel, a radio failure occurs.
The unsuccessful seizure may have been caused by a missing
indication of call establishment, missing detection of HO, missing
indication of the HO completed, or corrupted messages related to the
HO.
Number
Name
Release
001006
SUCCESS SEIZURE FOR HO
S1
Trigger points See figures:
. Successful SDCCH internal intra-cell handover
. Successful SDCCH internal inter-cell handover
. Successful SDCCH external handover target
Description Number of successful SDCCH seizures for a handover.
Updated When the RRM allocates an SDCCH as a response to an SDCCH
request in a handover attempt.
Number
Name
Release
001007
SUCCESS SEIZURE FOR IMMEDIATE ASSIGNMENT
S1
Trigger points See figures:
. Basic call with counters
. Reconfiguration from TCH to SDCCH
Description Number of successful seizures of SDCCH for an immediate
assignment.
Updated When the RRM allocates an SDCCH for an immediate assignment in
a call attempt.
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Number
Name
Release
001008
SUCCESS TCH SEIZURE FOR HO
S1
Trigger points See figures:
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Successful internal inter-cell handover
. Successful external handover, target
Description Number of successful requests for a TCH in a handover.
Updated When the RRM allocates a TCH as a response to a TCH request in a
handover attempt. The channel is reserved by the RRM, but thesuccess of the HO is not known in this phase.
Number
Name
Release
001009
SUCCESS TCH SEIZURE FOR NORMAL ASSIGNMENT
S1
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Successful TCH queuing
. Successful forced release
. Successful forced handover
Description Number of successful requests for a TCH in a normal assignment.
Updated When the RRM allocates a TCH as a response to a TCH request in a
call attempt.
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Number
Name
Release
001010
TCH REQUEST SUCCESS AND UNSUCCESS
S1
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful external handover, target
. Successful forced release
.
Unsuccessful forced release. Unsuccessful forced release with external handover
. Successful forced handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Total number of requests for a TCH (successful and unsuccessful).
Updated When the RRM receives a request for a TCH either in a call or a
handover attempt.
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Number
Name
Release
Definition updated
001011
TCH REQUEST REJECTED DUE TO LACK
S1
S11
Trigger points See figures:
. Basic call
. Basic call, no free TCHs
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
.
Unsuccessful forced release. Unsuccessful forced release with external handover
. Unsuccessful forced handover
Description Number of requests for TCHs that are rejected because there are no
radio resources available. This counter is also updated when a
request for TCH is rejected because of a mismatch between the types
of the requested channel and the A interface circuit.
Updated When the RRM has no TCHs available for either call or HO attempt
requests, or the RRM changes the A interface circuit pool before the
TCH allocation. This counter may be updated immediately after a
TCH request or, in case of queuing, when the queuing timer expires.
NOTE! In case of DR this counter is updated as follows:
1) When a call is removed from the queue because of a DR attempt,
this counter is NOT updated on the SOURCE side, instead counter
001173 is updated.
2) If queueing is not used or the queueing timer expires before a DR
attempt, this counter is updated on the SOURCE side.
3) On the TARGET side, this counter is updated in case of congestion
(blocking ).
Dependencies with other
counters/PI(s)
See also counter 004079.
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Number
Name
Release
001012
TRANSACTIONS ENDED DUE TO BSS PROBLEM
S1
Trigger points See figures:
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful external handover
. Unsuccessful external handover, MS sends a handover failure
Description Number of TCH transactions ended because of BSS problems.
Updated When one of the counters 001045, 001046, 001047, or 001051 is
updated. This counter represents their sum.
Impact See field descriptions of counters 001045, 001046, 001047 and
001051.
Number
Name
Release
Definition updated
001013
TRANSACTIONS ENDED DUE RADIO FAIL
S1
S11
Trigger points See figure Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of TCH transactions ended because of a radio failure.
Updated When a TCH transaction ends because of a radio failure and the RRM
releases the TCH. This counter is typical in connection with coverage
problems.
ERROR INDICATION is sent by the BTS to the BSC in the followingcases:
. Sequence error in a received message (the case where
retransmission is not possible).
. Timer T200 has expired N200 +1 times (MS doesn't respond any
more).
. Unsolicited DM response when link is established.
Impact Call cleared
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Number
Name
Release
001014
TRANSACTIONS ENDED DUE SOURCE CHANNEL FAIL
DURING HO
S1
Trigger points See figure Unsuccessful internal intra-cell handover, timer expires on
the source channel, call cleared
Description Number of TCH transactions ended because of a radio failure on the
source channel during a handover attempt.
Updated When a TCH transaction ends because of a radio failure (HO failure)
on the source channel during a handover attempt.
Impact HO failure and call cleared
Number
Name
Release
001015
TRANSACTIONS ENDED DUE TARGET CHANNEL FAIL
DURING HO
S1
Description A TCH transaction ends because of a radio failure (HO failure) on the
target channel during a handover attempt.
Updated When a TCH transaction ends because of a radio failure on the target
channel during a handover attempt.
Impact HO failure, the call may possibly be cleared
Reason for the impact Since the MS cannot access the target channel, a radio failure occurs.
It may be caused by missing indication of call establishment, missing
detection of HO, missing indication of the HO completed or corrupted
messages related to HO.
Dependencies with other
counters/PI(s)
Counter 1088 is also updated along with this counter if the MS fails to
return to the old channel during an inter BSC handover.
Number
Name
Release
001016
CALL ATTEMPTS IN THE QUEUE
S1
Trigger points See figures:
. Successful TCH queuing
. Basic call, no free TCHs
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Number
Name
Release
001016
CALL ATTEMPTS IN THE QUEUE
S1
Description Number of call attempts set in the queue for a TCH.
Updated When the RRM puts a TCH request for call attempt in the queue since
it has no TCHs of the requested kind available.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Number
Name
Release
001017
HANDOVER ATTEMPTS IN THE QUEUE
S1
Trigger points See figures:
. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
Description Number of HO attempts set in the queue for a TCH.
Updated When the RRM sets a TCH request for a handover attempt in the
queue since it has no TCHs of the requested kind available.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Number
Name
Release
001018
AVE QUEUE LENGTH FOR CHANNEL SEIZURE REQUEST
S1
Trigger points See figure Average counter updating
Description Average number of requests for channel seizure in the queue.
Updated Every 20 seconds, as averaging takes place once in the
measurement period. The sample counter is updated when a request
is set in the queue or removed from it. Updated only to normal TRX
record, not to extended TRX record.
Logical type Average
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Number
Name
Release
001019
QUEUE DENOMINATOR 1
S1
Description Denominator of the average number of requests for channel seizure
(always > 0).
Number
Name
Release
001020
AVE QUEUE TIME OF CALL ATTEMPTS
S1
Trigger points See figures:
. Successful TCH queuing
. Basic call, no free TCHs
Description The average time for which call attempts are kept in the queue (the
unit of the value is 10 ms).
Updated The sample counter is updated when a TCH request for a call attempt
is removed from the queue (both in a successful and unsuccessful
case).
Dependencies with other
counters/PI(s)
In a successful case counters 001009 and 001021 are updated along
with this counter. In an unsuccessful case counters 001021, 001024
and 001060 are updated along with this counter.
Logical type Average
Unit 10 ms
Number
Name
Release
001021
QUEUE DENOMINATOR 2
S1
Trigger points See figures:
. Successful TCH queuing
. Basic call, no free TCHs
Description Denominator of the average t ime for which call attempts are kept in
the queue (always > 0).
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Number
Name
Release
001022
AVE QUEUE TIME OF HO ATTEMPTS
S1
Trigger points See figures:
. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
Description The average time for which HO attempts are kept in the queue. (the
unit of the value is 10 ms)
Updated The sample counter is updated when a TCH request for a handover
attempt is removed from the queue (both in a successful andunsuccessful case).
Dependencies with other
counters/PI(s)
In a successful case counters 001008 and 001023 are updated along
with this counter. In an unsuccessful case counters 001023, 001025
and 001068 are updated along with this counter.
Logical type Average
Unit 10 ms
Number Name
Release
001023QUEUE DENOMINATOR 3
S1
Trigger points See figures:
. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
Description Denominator of the average time for which HO attempts are kept in
the queue (always > 0).
Number
Name
Release
001024
NOT SERVED QUEUED CALL ATTEMPTS
S1
Trigger points See figure Basic call, no free TCHs
Description Number of call attempts in the queue which were not served.
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Number
Name
Release
001024
NOT SERVED QUEUED CALL ATTEMPTS
S1
Updated When a call attempt is removed from the queue because a timer
expires, or the call attempt is substituted by another attempt of higher
priority.
NOTE! This counter is not updated in DR (neither in a successful or
unsuccessful DR).
Dependencies with other
counters/PI(s)
Counters 001020, 001021 and 001060 are updated along with this
counter.
Number Name
Release
001025NOT SERVED QUEUED HO ATTEMPTS
S1
Trigger points See figure Internal intra-cell handover, unsuccessful TCH queuing
Description Number of HO attempts in the queue which were not served.
Updated When a handover attempt is removed from the queue because a timer
expires, or the HO attempt is substituted by another attempt of higher
priority.
Dependencies with other counters/PI(s)
Counters 001022, 001023 and 001068 are updated along with thiscounter.
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Number
Name
Release
001026
TCH CALL REQ
S2
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Basic call
. Successful TCH queuing
. Basic call, no free TCHs
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
.
Internal directed retry . Successful forced release
. Unsuccessful forced release
. Successful forced handover
. Unsuccessful forced handover
Description Number of TCH requests for a normal assignment (both successful
and unsuccessful).
Updated When the RRM receives a TCH request in a call attempt.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Number
Name
Release
001027
SDCCH ACT FAIL
S2
Trigger points See figures:
. Unsuccessful SDCCH activation
. Unsuccessful SDCCH internal intra-cell handover, unsuccessful
channel activation
Description Number of SDCCH transactions that are ended because of a failure in
the activation of a channel either during a call or HO attempt.
Updated When either of the counters 001072 and 001074 is updated. This
counter represents their sum.
Impact - Call cleared
- HO failure
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Number
Name
Release
001027
SDCCH ACT FAIL
S2
Reason for the impact External / Abis interface
Number
Name
Release
001028
TCH ACT FAIL
S2
Trigger points See figures:
. Unsuccessful TCH activation
.
Unsuccessful internal inter-cell handover
Description Number of TCH transactions that are ended because of a failure in the
activation of a channel either during a call or HO attempt.
Updated When either of the counters 001081 and 001083 is updated. This
counter represents their sum.
Impact - Call cleared
- HO failure
Reason for the impact Abis Interface
Number
Name
Release
001029
TCH TR FAIL
S2
Trigger points See figure CONNECTION_FAILURE message with cause
transcoder_failure during a call
Description Number of TCH transactions that are ended because of a transcoder
failure.
Updated When a TCH transaction ends because of a transcoder failure during
a call attempt and the RRM releases the TCH. These failures can also
contains situations when the timer T3109 expires in a BSC in call
release phase while waiting for the Release Indication. The MS
subscriber does not see these failures caused by the T3109 expiry as
real drop calls.
Impact Call cleared
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Number
Name
Release
001030
TCH TR FAIL SOURCE
S2
Description Number of TCH transactions that are ended because of a transcoder
failure on the source channel during a handover on a TCH.
Updated When a TCH transaction ends because of a transcoder failure on the
source channel during a handover attempt and the RRM releases the
TCH. This happens before the RRM receives a message from the MS
stating that the HO or assignment is completed.
Impact HO failure and call cleared
Number
Name
Release
001031
TCH TR FAIL TARGET
S2
Trigger points See figure Unsuccessful internal intra-cell handover
Description Number of TCH transactions that are ended because of a transcoder
failure on the target channel during a handover on a TCH.
Updated When a TCH transaction ends because of a transcoder failure on the
target channel during a handover attempt and the RRM releases theTCH. This happens before the RRM receives a message from the MS
stating that the HO or assignment is completed.
Impact HO failure, the call may possibly be cleared
Number
Name
Release
001032
NOT RELEVANT
S2
Description Not in use
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Number
Name
Release
001033
SDCCH ABIS PROBL
S2
Trigger points See figures:
. Unsuccessful SDCCH activation
. Unsuccessful SDCCH activation
. TRX/TSL is blocked with different causes during an SDCCH
channel activation
. Unsuccessful SDCCH internal intra-cell handover
Description Number of SDCCH transactions that are ended because of a failure in
the Abis interface.
Updated When any of the counters 001075, 001076 and 001077 is updated.
This counter represents their sum.
Impact - Call cleared
- HO failure
Reason for the impact External / Abis interface
Number
Name
Release
001034
SDCCH A IF PROBL
S2
Trigger points See figures:
. SDCCH assignment failure
. Unsuccessful SDCCH external handover
Description Number of SDCCH transactions that are ended because of a failure in
the A interface.
Updated When any of the counters 001078, 001079, and 001080 is updated.
This counter represents their sum.
Impact - Call cleared
- HO failure
Reason for the impact External / A interface
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Number
Name
Release
001035
SDCCH LAPD FAIL
S2
Trigger points See figure TRX/TSL is blocked with different causes during an
SDCCH channel activation
Description Number of SDCCH transactions that are ended because of an LAPD
failure. (The TRX blocked is in one of these substates: signalling link
fault or PCM fault.)
Updated When an SDCCH transaction ends because of a TRX blocked by an
LAPD failure and the RRM releases the SDCCH.
Impact - Call cleared
- HO failure
Reason for the impact External / Abis interface
Number
Name
Release
001036
SDCCH BTS FAIL
S2
Trigger points See figure TRX/TSL is blocked with different causes during anSDCCH channel activation
Description Number of SDCCH transactions that are ended because of a BTS
failure. (The blocked TRX is in one of these substates: FU fault, CU
fault, BTS reset, BCF reset, both CU and FU fault, BCF fault.)
Updated When an SDCCH transaction ends because of a TRX being blocked
by a BTS failure and the RRM releases the SDCCH.
Impact Call cleared
Number
Name
Release
001037
SDCCH USER ACT
S2
Trigger points See figure TRX/TSL is blocked with different causes during an
SDCCH channel activation
Description Number of SDCCH transactions that are ended because of user
actions. (The TRX/TSL is in substate blocked by the user.)
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Number
Name
Release
001037
SDCCH USER ACT
S2
Updated When the user disconnects a busy SDCCH by blocking the TSL/TRX
with an MML command. The transaction ends and the SDCCH is
released.
Impact - Call cleared
- HO failure
Number
Name
Release
001038
SDCCH BCSU RESET
S2
Description Number of SDCCH transactions that are ended because of a BCSU
restart.
Updated When an SDCCH transaction ends because of a TRX blocked by a
BCSU restart and the RRM releases the SDCCH.
Impact - Call cleared
- HO failure
Reason for the impact BCSU restart
Number
Name
Release
001039
SDCCH NETW ACT
S2
Trigger points See figure TRX/TSL is blocked with different causes during an
SDCCH channel activation
Description Number of SDCCH transactions ended because of a reconfiguration
of the radio network. (The TRX blocked is in substate blocked by the
system.)
Updated When an SDCCH transaction ends because of a TRX blocked by a
failure which leads to TRX reconfiguration. The failure may occur both
during call and HO attempts.
Impact - Call cleared
- HO failure
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Number
Name
Release
001039
SDCCH NETW ACT
S2
Reason for the impact See Radio Network Management, Service Block Description, for radio
network reconfiguration.
Number
Name
Release
001040
TRUNK RES INVOC
S2
Trigger points See figures:
.
Successful trunk reservation. Unsuccessful trunk reservation
Description Total number of Trunk Reservation function invocations.
Updated When Trunk Reservation is applied during call setup or handover in
Radio Resource Management.
Feature Trunk Reservation
Number
Name
Release
001041
SUCC TRUNK RES INVOC
S2
Trigger points See figure Successful trunk reservation
Description Number of successful Trunk Reservation function invocations.
Updated When Trunk Reservation allows resources to be allocated in call
setup or handover in Radio Resource Management.
Feature Trunk Reservation
Number
Name
Release
001042
TRUNK RES INVOC RES REFUSED
S2
Trigger points See figure Unsuccessful trunk reservation .
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Number
Name
Release
001042
TRUNK RES INVOC RES REFUSED
S2
Description Number of Trunk Reservation function invocations that result in
resource allocation being refused.
Updated When Trunk Reservation denies access and does not allow resources
to be allocated in call setup or handover in Radio Resource
Management.
Feature Trunk Reservation
Number
Name
Release
Definition updated
001043
TCH REQ FACCH CALL SET
S2
S5
Trigger points See figures:
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion
Description Number of TCH requests for FACCH call setup during SDCCH
congestion (both successful and unsuccessful).
Updated When the RRM receives a request for an SDCCH but there are no
SDCCHs idle and a TCH is tried to be allocated as part of the FACCH
call setup. It is indicated in the received SDCCH request whether a
FACCH setup is allowed or not.
Dependencies with other
counters/PI(s)
Counters 001010 and 001098 are updated along with this counter.
Feature BSS5290 FACCH Call Setup because of SDCCH Congestion
Number
Name
Release
Definition updated
001044
TCH SEIZ FACCH CALL SET
S2
S5
Trigger points See figure FACCH call setup because of SDCCH congestion with
counters
Description Number of successful seizures of TCHs in FACCH call setup.
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Number
Name
Release
Definition updated
001044
TCH SEIZ FACCH CALL SET
S2
S5
Updated When the RRM allocates a TCH as a response to an SDCCH request
as part of the FACCH call setup because of no SDCCHs being idle.
Dependencies with other
counters/PI(s)
Counter 001099 is updated along with this counter.
Feature BSS5290 FACCH Call Setup because of SDCCH Congestion
Number
Name
Release
001045
TCH ABIS PROBL
S2
Trigger points See figures:
. Unsuccessful TCH activation
. TCH assignment failure
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
Description Number of TCH transactions that are ended because of a failure in the
Abis interface.
Updated When any of the counters 001084, 001085, and 001086 is updated.
This counter represents their sum.
Impact - The call may possibly be cleared
- HO failure
Reason for the impact External / Abis Interface
Number
Name
Release
001046
TCH LAPD FAIL
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions that are ended because of an LAPD
failure. (The TRX blocked is in one of these substates: signalling link
fault or PCM fault.)
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Number
Name
Release
001046
TCH LAPD FAIL
S2
Updated When a TCH transaction ends because of a TRX blocked by an LAPD
failure and the RRM releases the TCH.
Impact - Call cleared
- HO failure
Number
Name
Release
001047
TCH BTS FAIL
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions that are ended because of a BTS failure.
(The TRX blocked is in one of these substates: FU fault, CU fault, BTS
reset, BCF reset, both CU and FU fault, BCF fault.)
Updated When a TCH transaction ends because of a TRX blocked by a BTS
failure and the RRM releases the TCH.
Impact Call cleared
Number
Name
Release
001048
TCH USER ACT
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions that are ended because of user actions.
(The TRX/TSL is in substate blocked by the user.)
Updated When the user disconnects a busy TCH by blocking the TSL/TRX with
an MML command. The transaction ends and the TCH is released.
Impact - Call cleared
- HO failure
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Number
Name
Release
001049
TCH BCSU RESET
S2
Description Number of TCH transactions that are ended because of a BCSU
restart.
Updated When a TCH transaction ends because of a TRX blocked by a BCSU
restart and the RRM releases the TCH.
Impact - Call cleared
- HO failure
Reason for the impact BCSU restart
Number
Name
Release
001050
TCH NETW ACT
S2
Trigger points See figure TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions ended because of a reconfiguration of
the radio network. (The TRX blocked is in substate blocked by the
system.)
Updated When a TCH transaction ends because of a TRX blocked by a failure
which leads to TRX reconfiguration.
Reason for the impact See Radio Network Management for radio network reconfiguration.
Number
Name
Release
001051
TCH A IF PROBL
S2
Trigger points See figures:
. TCH assignment failure
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
Description Number of TCH transactions that are ended because of a failure in the
A interface.
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Number
Name
Release
001051
TCH A IF PROBL
S2
Updated When any of the counters 001087, 001088 and 001089 is updated.
This counter represents their sum.
Impact - Call is possibly cleared
- HO failure
Reason for the impact External / A interface
Number
Name
Release
001052
TRHO REQ
S2
Trigger points See figure Successful traffic reason handover, source
Description Number of HOs because of traffic reasons.
Updated When a handover, under the control of the MSC and because of a
traffic reason procedure, is started as a response to the
TRAFFIC_REASON_HO_CANDIDATE_ENQUIRY message from
the A interface. The counter tells the number of mobiles, determined
by the MSC to be handed over. Updated only to normal TRX record,
not to extended TRX record.
Feature Traffic Reason Handover
Number
Name
Release
001053
TRHO ENQUIRIES
S2
Trigger points See figure Successful traffic reason handover, source
Description Number of enquiries about traffic reason HO.
Updated When the RRM starts a handover by sending a message enquiring
about the traffic reason to the Abis interface.
Feature Traffic Reason Handover
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Number
Name
Release
001054
FOR REL ASSIGN REQ ATT
S3
Trigger points See figures:
. Basic call with priority subscriber
. Successful forced release
. Unsuccessful forced release
Description Number of call attempt requests capable of doing a forced release for
a call in progress.
Updated When the RRM receives a TCH request for a call attempt which is
capable of doing a forced release for a call in progress.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001055
FOR HO ASSIGN REQ ATT
S3
Trigger points See figures:
. Basic call with priority subscriber
. Successful forced handover
. Unsuccessful forced handover
Description Number of call attempt requests capable of doing a forced HO for a
call in progress.
Updated When the RRM receives a TCH request for a call attempt which is
capable of doing a forced HO for a call in progress.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
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Number
Name
Release
001056
QUE ALL ASSIGN REQ ATT
S3
Trigger points See figures:
. Basic call with counters
. Successful TCH queuing
. Basic call, no free TCHs
. Unsuccessful trunk reservation
Description Number of requests for a call attempt with queuing allowed.
Updated When the RRM receives a TCH request for a call attempt which is
allowed to queue for channels.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001057
QUE NALL ASSIGN REQ ATT
S3
Trigger points See figures:
. Basic call with counters
. Basic call, no free TCH and queuing or directed retry is not
allowed
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
Description Number of requests for a call attempt with queuing not allowed.
Updated When the RRM receives a TCH request for a call attempt which is not
allowed to queue for channels.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
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Number
Name
Release
001058
FOR REL ASSIGN REQ FAIL
S3
Trigger points See figure Unsuccessful forced release
Description Number of rejected call attempt requests capable of doing a forced
release for a call in progress.
Updated When the RRM rejects a TCH request for a call attempt which is
capable of doing a forced release for a call in progress. The high
priority TCH request is rejected because of lack of a suitable call for
release or because pre-emption software is not in use in the BSC.
Dependencies with other counters/PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
Reason for the impact There is no suitable call for release in the cell or the pre-emption
software is not in use in the BSC.
Number
Name
Release
001059
FOR HO ASSIGN REQ FAIL
S3
Trigger points See figure Unsuccessful forced handover
Description Number of rejected call attempt requests capable of doing a forced
HO for a call in progress.
Updated When the RRM rejects a TCH request for a call attempt which is
capable of doing a forced handover for a call in progress. The high
priority TCH request is rejected because of a lack of suitable calls for
a forced handover or because the pre-emption software is not in use
in the BSC.
Dependencies with other counters/PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
Reason for the impact There is no suitable call for a forced handover in the cell or the pre-
emption software is not in use in the BSC.
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Number
Name
Release
001060
QUE ALL ASSIGN REQ FAIL
S3
Trigger points See figures:
. Basic call, no free TCHs
. Unsuccessful trunk reservation
Description Number of rejected call attempt requests with queuing allowed.
Updated When the RRM rejects a TCH request for a call attempt which is
allowed to queue.
Dependencies with other
counters/PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
Reason for the impact This may be because of queuing is not allowed in the BTS, or the
request is removed from the queue because of expiry of a timer, or the
request is replaced by a request with higher priority.
Number
Name
Release
001061
QUE NALL ASSIGN REQ FAIL
S3
Trigger points See figures:
. Basic call
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
Description Number of rejected call attempt requests with queuing not allowed.
Updated When the RRM rejects a TCH request for a call attempt which is not
allowed to queue.
Dependencies with other
counters/PI(s)
Counters 001011 and 001141 are updated along with this counter.
Feature Queuing and Priority
Reason for the impact There are no radio resources available.
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Number
Name
Release
001062
FOR REL HO REQ ATT
S3
Trigger points See figure Unsuccessful forced release with external handover
Description Number of requests for a handover capable of doing a forced release
for a call in progress.
Updated When the RRM receives a TCH request for a handover attempt which
is capable of doing a forced release for a call in progress.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001063
FOR HO HO REQ ATT
S3
Trigger points See figure Unsuccessful forced handover with external handover
Description Number of requests for a handover capable of doing a forced HO for a
call in progress.
Updated When the RRM receives a TCH request for a handover attempt which
is capable of doing a forced HO for a call in progress.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
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Number
Name
Release
001064
QUE ALL HO REQ ATT
S3
Trigger points See figures:
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful external handover, target.
Description Number of requests for a handover with queuing allowed.
Updated When the RRM receives a TCH request for a handover attempt which
is allowed to queue for radio resources.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
Number
Name
Release
001065
QUE NALL HO REQ ATT
S3
Trigger points See figures:
. Successful internal intra-cell handover
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Successful internal inter-cell handover
. Successful external handover, target
Description Number of requests for HO with queuing not allowed.
Updated When the RRM receives a TCH request for a handover attempt which
is not allowed to queue for radio resources.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature Queuing and Priority
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Number
Name
Release
001066
FOR REL HO REQ FAIL
S3
Trigger points See figure Unsuccessful forced release with external handover
Description Number of rejected requests for a handvover capable of doing a
forced release for a call in progress.
Updated When the RRM rejects a TCH request for a handover attempt which is
capable of doing a forced release for a call in progress. The high
priority TCH request is rejected because of a lack of suitable calls for
release or because the pre-emption software is not in use in the BSC.
Dependencies with other counters/PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact There is no suitable call for release in the cell or the pre-emption
software is not in use in BSC.
Number
Name
Release
001067
FOR HO HO REQ FAIL
S3
Trigger points See figure Unsuccessful forced handover with external handover
Description Number of rejected requests for a handover capable of doing a forced
HO for a call in progress.
Updated When the RRM rejects a TCH request for a handover attempt which is
capable of doing a forced handover for a call in progress. The high
priority TCH request is rejected because of a lack of suitable calls for
a forced handover or because the pre-emption software is not in use
in the BSC.
Dependencies with other counters/PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact There is no suitable call for a forced handover in the cell or the pre-
emption software is not in use in the BSC.
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Number
Name
Release
001068
QUE ALL HO REQ FAIL
S3
Trigger points See figure Internal intra-cell handover, unsuccessful TCH queuing
Description Number of the rejected requests for a handover with queuing allowed.
Updated When the RRM rejects a TCH request for a handover attempt which is
allowed to queue.
Dependencies with other
counters/PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact This may be because queuing is not allowed in the BTS, or the
request is removed from the queue because of expiry of a timer, or the
request is replaced by another with higher priority.
Number
Name
Release
001069
QUE NALL HO REQ FAIL
S3
Trigger points See figure Unsuccessful underlay overlay internal intra-cell handover,queuing not allowed
Description Number of rejected requests for a handover with queuing not allowed.
Updated When the RRM rejects a TCH request for a handover attempt which is
not allowed to queue.
Dependencies with other
counters/PI(s)
Counter 001011 is updated along with this counter.
Feature Queuing and Priority
Reason for the impact There are no radio resources available.
Number
Name
Release
001070
FORCED RELEASES
S3
Trigger points See figure Successful forced release
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Number
Name
Release
001070
FORCED RELEASES
S3
Description Number of forced releases.
Updated When the RRM starts to terminate a call in progress forcefully by
sending a release request to the Abis interface.
Feature Queuing and Priority
Number
Name
Release
001071
FORCED HANDOVERS
S3
Trigger points See figure Successful forced handover
Description Number of forced HOs.
Updated When the RRM receives an acknowledgement from the Handover
Attempt Supervisor of the Abis interface to its request for a forced HO.
Feature Queuing and Priority
Number
Name
Release
001072
SDCCH ACT FAIL CALL
S3
Trigger points See figure Unsuccessful SDCCH activation
Description Number of SDCCH transactions that are ended because of a failure in
the activation of a channel during a call.
Updated When an SDCCH transaction ends because of a failure to activate a
channel in the BTS and the RRM releases the SDCCH.
Impact Call cleared
Reason for the impact Abis Interface
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Number
Name
Release
001073
NOT RELEVANT
S3
Description Not in use
Number
Name
Release
001074
SDCCH ACT FAIL TARGET
S3
Trigger points See figure Unsuccessful SDCCH internal intra-cell handover,
unsuccessful channel activation
Description Number of SDCCH transactions that are ended because of a failure to
activate the target channel during an SDCCH HO.
Updated When an SDCCH transaction ends because of a failure to activate the
target channel during a handover attempt and the RRM releases the
SDCCH.
Feature SDCCH Handover
Impact HO failure and possibly call cleared
Reason for the impact External / Abis Interface
Number
Name
Release
001075
SDCCH ABIS FAIL CALL
S3
Trigger points See figures:
. Unsuccessful SDCCH activation
. Unsuccessful SDCCH activation
.
TRX/TSL is blocked with different causes during an SDCCH channel activation
Description Number of SDCCH transactions that are ended because of a failure in
the Abis interface during a call in progress. There is no
acknowledgement of channel activation, no indication of call
establishment received, i.e., ghosts.
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Number
Name
Release
001075
SDCCH ABIS FAIL CALL
S3
Updated When an SDCCH transaction ends because of signalling problems in
the Abis interface and the RRM releases the SDCCH.
Reasons that trigger the counter:
Phantom RACHs that have a valid establihment cause.
The BTS can hear the MS, but the MS cannot hear the BTS, and so
the MS does not respond to the IMMEDIATE ASSIGNMENT
message with a SABM.
MS is accessing the network at the limit of sensitivity and messages
are lost.
Poor Radio conditions.
MS is accessing network through another BTS (co-channel, co-BSIC
interference).
Impact Call cleared
Reason for the impact External / Abis interface
Number
Name
Release
001076
SDCCH ABIS FAIL SOURCE
S3
Description Number of SDCCH transactions that are ended because of a failure in
the Abis interface on the source channel during SDCCH-SDCCH or
SDCCH-TCH HO.
Updated When an SDCCH transaction ends because of a failure in the Abis
interface on the source channel during a handover and the RRM
releases the SDCCH.
Feature SDCCH Handover, Directed retry
Impact HO failure and call cleared
Reason for the impact External / Abis interface.
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Number
Name
Release
001077
SDCCH ABIS FAIL TARGET
S3
Trigger points See figure Unsuccessful SDCCH internal intra-cell handover
Description Number of SDCCH transactions that are ended because of a failure in
the Abis interface on the target channel during a handover.
Updated When an SDCCH transaction ends because of a failure in the Abis
interface on the target channel during a handover and the RRM
releases the SDCCH.
Feature SDCCH Handover
Impact HO failure and possibly call cleared
Reason for the impact External / Abis interface
Number
Name
Release
001078
SDCCH A IF FAIL CALL
S3
Trigger points See figure SDCCH assignment failure
Description Number of SDCCH transactions ended because of a failure in the A
interface during a call attempt.
Updated When an SDCCH transaction ends because of signalling problems in
the A interface during a call attempt and the RRM releases the
SDCCH.
Impact Call cleared
Reason for the impact External / A interface.
There may be a failure in the SDCCH signalling connection.
Number
Name
Release
001079
SDCCH A IF FAIL SOURCE
S3
Trigger points See figure Unsuccessful SDCCH external handover
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Number
Name
Release
001079
SDCCH A IF FAIL SOURCE
S3
Description Number of SDCCH transactions ended because of a failure in the A
interface on the source channel during an SDCCH-SDCCH or
SDCCH-TCH HO.
Updated When an SDCCH transaction ends because of signalling problems in
the A interface during an SDCCH-SDCCH or SDCCH-TCH HO and
the RRM releases the SDCCH.
Feature SDCCH Handover, Directed retry
Impact HO failure and call cleared
Reason for the impact External / A interface.
There may be a failure in the SDCCH signalling connection.
Number
Name
Release
001080
SDCCH A IF FAIL TARGET
S3
Trigger points See figure Unsuccessful SDCCH external handover
Description Number of SDCCH transactions ended because of a failure in the Ainterface on the target channel during an SDCCH HO.
Updated When an SDCCH transaction ends because of signalling problems in
the A interface during an SDCCH HO and the RRM releases the
SDCCH.
Feature SDCCH Handover
Impact HO failure and call cleared
Reason for the impact External / A interface.
There may be a failure in the SDCCH signalling connection.
Number
Name
Release
001081
TCH ACT FAIL CALL
S3
Trigger points See figure Unsuccessful TCH activation
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Number
Name
Release
001081
TCH ACT FAIL CALL
S3
Description Number of TCH transactions that are ended because of a failure to
activate a channel during a call attempt.
Updated When a TCH transaction ends because of a failure to activate a
channel in the BTS and the RRM releases the TCH.
Impact Call cleared
Number
Name
Release
001082
NOT RELEVANT
S3
Description Not in use
Number
Name
Release
001083
TCH ACT FAIL TARGET
S3
Trigger points See figure Unsuccessful internal inter-cell handover
Description Number of TCH transactions that are ended because of a failure to
activate the target channel during an SDCCH-TCH or TCH-TCH HO.
Updated When a TCH transaction ends because of a failure to activate the
target channel during a TCH HO attempt and the RRM releases the
TCH.
Impact HO failure and possibly call cleared
Reason for the impact The RRM receives the CHANNEL_ACTIVATION_NACK message.
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Number
Name
Release
001084
TCH ABIS FAIL CALL
S3
Trigger points See figures:
. Unsuccessful TCH activation
. TCH assignment failure
. TRX or TSL is blocked with different causes during a call
Description Number of TCH transactions ended because of a failure in the Abis
interface during a call in progress.
Updated When a TCH transaction ends because of signalling problems in the
Abis interface and the RRM releases the TCH.
Impact Call cleared
Reason for the impact External / Abis Interface
The signalling problems may include missing acknowledgement of
channel activation, missing indication of call establishment, receipt of
an error indication, corrupted messages, missing measurement
results from the BTS, excessive timing advance or some internal
reasons. These failures can also contain situations when the timer
T3109 expires in a BSC in call release phase while waiting for the
Release Indication. The MS subscriber does not see these failures
caused by the T3109 expiry as real drop calls.
Number
Name
Release
001085
TCH ABIS FAIL SOURCE
S3
Description Number of TCH transactions ended because of a failure in the Abis
interface on the source channel during a TCH HO.
Updated When a TCH transaction ends because of a failure in the Abis
interface on the source channel during a TCH HO and the RRM
releases the TCH.
Impact HO failure and call cleared
Reason for the impact External / Abis Interface
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Number
Name
Release
001086
TCH ABIS FAIL TARGET
S3
Trigger points See figure Unsuccessful internal intra-cell handover
Description Number of TCH transactions ended because of a failure in the Abis
interface on the target channel during a TCH HO.
Updated When a TCH transaction ends because of a failure in the Abis
interface on the target channel during a TCH HO and the RRM
releases the TCH.
Impact HO failure and possibly call cleared
Reason for the impact External / Abis Interface
Number
Name
Release
001087
TCH A IF FAIL CALL
S3
Trigger points See figure TCH assignment failure
Description Number of TCH transactions ended because of a failure in the A
interface during a call in progress.
Updated When a TCH transaction ends because of signalling problems in the A
interface during a call and the RRM releases the TCH.
Impact Call cleared
Reason for the impact External / A interface.
The signalling problems may include the CLEAR_COMMAND
message from the MSC during the call setup phase before the MSC
receives an indication of the completion of the assignment from the
MS and the ABNORMAL_CLEAR_ RECEIVED_DUE_TO_A_
INTERFACE message (reset circuit, SCCP cleared by RLSD).
Number
Name
Release
001088
TCH A IF FAIL SOURCE
S3
Trigger points See figure Unsuccessful external handover, source BSC
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Number
Name
Release
001088
TCH A IF FAIL SOURCE
S3
Description Number of TCH transactions ended because of a failure in the A
interface on the source channel during a handover attempt.
Updated When a TCH transaction ends because of an A interface failure (HO
failure) on the source channel during a TCH HO attempt and the RRM
releases the TCH.
Dependencies with other
counters/PI(s)
This counter is updated in the source cell. If the target cell lies within
the same BSC, also counter 001015 in the target cell is updated along
with this counter.
This counter is also updated if the MS fails to return to the old channel
during an inter
BSC handover.
Impact HO failure and call cleared
Reason for the impact External / A interface
Number
Name
Release
001089
TCH A IF FAIL TARGET
S3
Trigger points See figure Unsuccessful external handover, MS sends a handover failure
Description Number of TCH transactions ended because of a failure in the A
interface on the target channel during a handover attempt.
Updated When a TCH transaction ends because of a failure in the A interface
(HO failure) on the target channel during a handover attempt and the
RRM releases the TCH .
Impact HO failure, the call may possibly be cleared
Reason for the impact External / A interface
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Number
Name
Release
001090
TCH REQ UND OVER
S4
Trigger points See figures:
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal directed retry
. Successful internal inter-cell handover
Description Number of TCH requests for an underlay overlay HO. Updated only to
normal TRX record, not to extended TRX record.
Updated When the RRM receives a TCH request for an underlay overlay HO.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSC4016 Intelligent Underlay Overlay
Number
NameRelease
001091
TCH SEIZ UND OVERS4
Trigger points See figures:
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Successful internal inter-cell handover
Description Number of TCH seizures for an underlay overlay HO.
Updated When the RRM allocates a TCH as a response to a TCH request for
an underlay overlay HO. Updated only to normal TRX record, not to
extended TRX record.
Dependencies with other
counters/PI(s)
Counter 001008 is updated along with this counter.
Feature BSC4016 Intelligent Underlay Overlay
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Number
Name
Release
001092
TCH REJ REQ UND OVE
S4
Trigger points See figure Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
Description Number of TCH requests for an underlay overlay HO rejected
because of a lack of resources.
Updated When the RRM rejects a TCH request for an underlay overlay HO
because of lack of resources. Updated only to normal TRX record, not
to extended TRX record.
Dependencies with other counters/PI(s)
Counter 001011 is updated along with this counter.
Feature BSC4016 Intelligent Underlay Overlay
Number
Name
Release
001093
SUCC MOC TEST CALL
S4
Description Number of successful MOC test calls during a scheduled test.
Updated When the RRM receives a message from the BTTEST.
Feature BSC4531 BTS Testing:Scheduled MOC
Number
Name
Release
001094
FAIL MOC TEST CALL
S4
Description Number of unsuccessful MOC test calls during a scheduled test.
Updated When the RRM receives a message from the BTTEST.
Dependencies with other
counters/PI(s)
BSC4531 BTS Testing: Scheduled MOC
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Number
Name
Release
001095
PRI SUBSCR TCH REQ
S5
Trigger points See figures:
. Basic call with priority subscriber
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of TCH requests of the type priority subscriber
Updated When the RRM receives a TCH request either in a call or HO attemptand the MS priority level in the priority information element (PIE)
indicates that the MS is a priority subscriber.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5190 Enhanced Trunk Reservation
Number
NameRelease
001096
PRI SUBSCR SUCC TCH SEIZS5
Trigger points See figure Basic call with priority subscriber
Description Number of successful TCH seizures of the type priority subscriber.
Updated When the RRM allocates a TCH as a response to a TCH request in
either a call or HO attempt and the MS priority level in the priority
information element (PIE) indicates that the MS is a priority
subscriber.
Dependencies with other
counters/PI(s)
Counter 001008 or 001009 is updated along with this counter.
Feature BSS5190 Enhanced Trunk Reservation
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Number
Name
Release
001097
NO PRI SUBSCR REFUSED TCH REQ
S5
Trigger points See figure Unsuccessful trunk reservation
Description Number of TCH requests of the type non-priority subscriber that are
rejected because there are no resources available to subscribers
other than priority subscribers.
Updated When the RRM rejects a TCH request because of no resources
available to subscribers other than priority subscribers.
Dependencies with other
counters/PI(s)
Counter 001042 is updated along with this counter.
Feature BSS5190 Enhanced Trunk Reservation
Number
Name
Release
001098
TCH SEIZ ATT DUE SDCCH CON
S5
Trigger points See figures:
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion
Description Number of attempts to seize a TCH because of SDCCH congestion.
Updated When the RRM attempts to allocate a TCH as a response to a
request for an SDCCH seizure during SDCCH congestion. The RRM
does this if the TCH allocation (=FACCH setup) is allowed in the
message carrying the request for the SDCCH seizure.
Dependencies with other
counters/PI(s)
Counters 001010 and 001043 are updated along with this counter.
Feature BSS5290 FACCH Call Setup because of SDCCH Congestion
Number
Name
Release
001099
TCH SEIZ DUE SDCCH CON
S5
Trigger points See figure FACCH call setup because of SDCCH congestion with
counters
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Number
Name
Release
001099
TCH SEIZ DUE SDCCH CON
S5
Description Number of successful TCH seizures because of congestion on the
SDCCH.
Updated When the RRM allocates a TCH as a response to a request for
SDCCH seizure during congestion on the SDCCHs. The RRM
allocates a TCH if the TCH allocation (=FACCH setup) is allowed in
the message carrying the request for the SDCCH seizure.
Dependencies with other
counters/PI(s)
This counter is updated along with counter 001044.
Feature BSS5290 FACCH Call Setup because of SDCCH Congestion
Number
Name
Release
001100
TRUNK TCH REJECTED FR REQ
S5
Trigger points See figure Unsuccessful trunk reservation
Description Number of requests for trunk reservation function that result in the
rejection of TCH allocation when FR or preferred FR TCH has been
requested.
Updated When the RRM denies access by applying the trunk reservation
function and FR or preferred FR TCH has been requested.
Dependencies with other
counters/PI(s)
Counter 001042 is updated along with this counter.
Feature BSS5010 Half Rate and BSS5190 Enhanced Trunk Reservation
Number
Name
Release
001101
TRUNK TCH REJECTED HR REQ
S5
Trigger points See figure Unsuccessful trunk reservation
Description Number of requests for trunk reservation function that result in
rejection of TCH allocation when HR or preferred HR TCH has been
requested.
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Number
Name
Release
001101
TRUNK TCH REJECTED HR REQ
S5
Updated When the RRM denies access by applying the trunk reservation
function and HR or preferred HR TCH has been requested.
Dependencies with other
counters/PI(s)
Counter 001042 is updated along with this counter.
Feature BSS5010 Half Rate and BSS5190 Enhanced Trunk Reservation
Number
Name
Release
001102
FULL TCH REQ SUCC UNSUCC
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs
. Unsuccessful trunk reservation
.
Successful internal intra-cell handover . Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful external handover, target
. Successful forced release
. Unsuccessful forced release
. Unsuccessful forced release with external handover
.
Successful forced handover . Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of requests for FR TCH (both successful and unsuccessful).
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Number
Name
Release
001102
FULL TCH REQ SUCC UNSUCC
S5
Updated When the RRM receives a TCH request either in a call or in a
handover attempt and FR TCH channel is requested.
NOTE! This counter is updated when the channel rate of the
requested TCH is defined to be FR only; the type of the TCH may be
limited either by an assignment request or a handover request from
the A interface, or it may be because of the BSC restricting the
selection of channel type in TCH allocation.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5010 Half Rate
Number
Name
Release
001103
HALF TCH REQ SUCC UNSUCC
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs
. Unsuccessful trunk reservation
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful external handover, target
. Successful forced release
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Successful forced handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
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Number
Name
Release
001103
HALF TCH REQ SUCC UNSUCC
S5
Description Number of requests for HR TCH requests (both successful and
unsuccessful).
Updated When the RRM receives a TCH request either in a call or HO attempt
and HR TCH channel is requested.
NOTE! This counter is updated when the channel rate of the
requested TCH is defined to be HR only; the type of the TCH may be
limited either by an assignment request or a handover request from
the A interface, or it may be because of the BSC restricting the
selection of channel type in TCH allocation.
Dependencies with other counters/PI(s) Counter 001010 is updated along with this counter.
Feature BSS5010 Half Rate
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Number
Name
Release
001104
TCH REQ FULL PREFERRED
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful external handover, target
. Successful forced release
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Successful forced handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of TCH requests with FR preferred (both successful and
unsuccessful).
Updated When the RRM receives a TCH request either in a call or HO attempt
and FR or HR TCH channel is requested alternatively with FR
preferred.
NOTE! The preferred channel rate can be defined either by an
assignment request or HO request received from the A interface or by
software which is activated on the BSC for controlling the selection of
the channel type in TCH allocation. In the latter case the preferred
channel type can be quite the opposite to the one initially set by the
MSC.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5010 Half Rate
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Number
Name
Release
001105
TCH REQ HALF PREFERRED
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful external handover, target
. Successful forced release
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Successful forced handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of TCH requests with HR preferred (both successful and
unsuccessful).
Updated When the RRM receives a TCH request either in a call or HO attempt
and FR or HR TCH channel is requested alternatively with HR
preferred.
NOTE! The preferred channel rate can be defined either by
assignment request or HO request received from the A interface or by
softwares which are activated on the BSC for controlling the selection
of the channel type in TCH allocation. In the latter case the preferred
channel type can be quite the opposite to the one initially set by the
MSC.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS5010 Half Rate
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Number
Name
Release
001106
SUCC FULL TCH SEIZ
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Successful TCH queuing
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Successful internal inter-cell handover
. Successful external handover, target
.
Successful forced release. Successful forced handover
Description Number of successful FR TCH seizures.
Updated When the RRM allocates an FR TCH as a response to a TCH request.
Dependencies with other
counters/PI(s)
Either counter 001008 or counter 001009 is updated along with this
counter.
Feature BSS5010 Half Rate
Number
Name
Release
001107
SUCC HALF TCH SEIZ
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Successful TCH queuing
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Successful internal inter-cell handover
. Successful external handover, target
. Successful forced release
. Successful forced handover
Description Number of successful HR TCH seizures.
Updated When the RRM allocates an HR TCH as a response to a TCH
request.
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Number
Name
Release
001107
SUCC HALF TCH SEIZ
S5
Dependencies with other
counters/PI(s)
Either counter 001008 or counter 001009 is updated along with this
counter.
Feature BSS5010 Half Rate
Number
Name
Release
001108
FULL TCH SEIZ SPEECH VER 1
S5
Trigger points See figures:
. Normal release
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of successful FR TCH seizures when speech FR version 1 is
in use.
Updated When an FR TCH allocated for speech is released and the FR codec
version 1 is in use.
Feature BSS5010 Half Rate
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Number
Name
Release
001109
FULL TCH SEIZ SPEECH VER 2
S5
Trigger points See figures:
. Normal release
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of successful FR TCH seizures when speech FR version 2 is
in use.
Updated When an FR TCH allocated for speech is released and the FR codec
version 2 is in use.
Feature BSS5010 Half Rate
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Number
Name
Release
001110
FULL TCH SEIZ SPEECH VER 3
S5
Trigger points See figures:
. Normal release
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of successful FR TCH seizures when speech FR version 3 is
in use.
Updated When an FR TCH allocated for speech is released and the FR codec
version 3 is in use.
Feature BSS5010 Half Rate
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Number
Name
Release
001111
HALF TCH SEIZ SPEECH VER 1
S5
Trigger points See figures:
. Normal release
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of successful HR TCH seizures when speech FR version 1 is
in use.
Updated When an HR TCH allocated for speech is released and the HR codec
version 1 is in use.
Feature BSS5010 Half Rate
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Number
Name
Release
001112
HALF TCH SEIZ SPEECH VER 2
S5
Trigger points See figures:
. Normal release
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of successful HR TCH seizures when speech FR version 2 is
in use.
Updated When an HR TCH allocated for speech is released and the HR codec
version 2 is in use.
Feature BSS5010 Half Rate
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Number
Name
Release
001113
HALF TCH SEIZ SPEECH VER 3
S5
Trigger points See figures:
. Normal release
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Successful external handover, source
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Successful forced release
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of successful HR TCH seizures when speech FR version 3 is
in use.
Updated When an HR TCH allocated for speech is released and the HR codec
version 3 is in use.
Feature BSS5010 Half Rate
Number
Name
Release
001114
FULL TCH SEIZ NORM ASSIGNMENT
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Successful TCH queuing
. Successful forced release
. Successful forced handover
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Number
Name
Release
001114
FULL TCH SEIZ NORM ASSIGNMENT
S5
Description Number of successful FR TCH seizures for a normal assignment.
Updated When the RRM allocates an FR TCH as a response to a TCH request
in a call attempt.
Dependencies with other
counters/PI(s)
Counter 001009 is updated along with this counter.
Feature BSS5010 Half Rate
Number
Name
Release
001115
HALF TCH SEIZ NORM ASSIGNMENT
S5
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. Successful TCH queuing
. Successful forced release
. Successful forced handover
Description Number of successful HR TCH seizures for a normal assignment.
Updated When the RRM allocates an HR TCH as a response to a TCH request
in a call attempt.
Dependencies with other
counters/PI(s)
Counter 001009 is updated along with this counter.
Feature BSS5010 Half Rate
Number Name
Release
001116FULL TCH SEIZ INT HO CH RATE
S5
Trigger points See figures:
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Successful internal inter-cell handover
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Number
Name
Release
001116
FULL TCH SEIZ INT HO CH RATE
S5
Description Number of successful FR TCH seizures for an internal HO when the
channel rate changes.
Updated When the RRM allocates an FR TCH for an internal HO as a response
to a TCH request and the channel rate is changed from HR to FR.
Dependencies with other
counters/PI(s)
Counters 001008 and 001106 are updated along with this counter.
Feature BSS5010 Half Rate
Number
Name
Release
001117
HALF TCH SEIZ INT HO CH RATE
S5
Trigger points See figures:
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Successful internal inter-cell handover
Description Number of successful HR TCH seizures for an internal HO when the
channel rate changes.
Updated When the RRM allocates an HR TCH for an internal HO as a
response to a TCH request and the channel rate is changed from FR
to HR.
Dependencies with other
counters/PI(s)
Counters 001008 and 001107 are updated along with this counter.
Feature BSS5010 Half Rate
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Number
Name
Release
001118
REJ TCH REQ DUE LACK FR
S5
Trigger points See figures:
. Basic call
. Basic call, no free TCHs
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of TCH requests that are rejected because of a lack of
resources when FR or preferred FR TCH is requested.
Updated When no TCHs are available when requested from the RRM either in
a call or HO attempt and either FR or preferred FR TCH was
requested. The counter may be updated immediately after the TCH
request or, in case of queuing, after the queuing timer expires.
Dependencies with other
counters/PI(s)
Counter 001011 is updated along with this counter.
Feature BSS5010 Half Rate
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Number
Name
Release
001119
REJ TCH REQ DUE LACK HR
S5
Trigger points See figures:
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Basic call, no free TCHs
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of TCH requests that are rejected because of a lack of
resources, when HR or preferred HR TCH is requested.
Updated When no TCHs are available when requested from the RRM either in
a call or HO attempt and either HR or preferred HR TCH was
requested. The counter may be updated immediately after the TCH
request or, in case of queuing after the queuing, timer expires.
Dependencies with other counters/PI(s)
Counter 001011 is updated along with this counter.
Feature BSS5010 Half Rate
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Number
Name
Release
001120
FULL TCH REJ DUE HR TRAF
S5
Trigger points See figures:
. FACCH call setup because of SDCCH congestion, no free TCH
channel
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs
. Unsuccessful trunk reservation
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Successful forced release
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Successful forced handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of requests for FR TCHs that are rejected because of HR
traffic, whether queuing occurred or not.
Updated When no FR TCH is available in a situation where HR calls are being
maintained in DR TSLs and there are free HR TCHs among the DR or
permanent HR resources for at least two HR calls.
NOTE! The counter is incremented on receipt of the request for the
FR TCH, regardless of whether the request is set in the queue, pre-
empted, subjected to directed retry or some other procedure of the
kind.
Feature BSS5010 Half Rate
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Number
Name
Release
001121
HALF TCH REJ DUE FR TRAF
S5
Trigger points See figures:
. FACCH call setup because of SDCCH congestion, no free TCH
channel
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs
. Unsuccessful trunk reservation
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Successful forced release
. Unsuccessful forced release
. Unsuccessful forced release with external handover
. Successful forced handover
. Unsuccessful forced handover
. Unsuccessful forced handover with external handover
Description Number of requests for HR TCHs that are rejected because of FR
traffic, whether queuing occurred or not.
Updated When no HR TCH is available in a situation where a FR call is being
maintained in a DR TSL and at the same time there is a permanent
FR type TSL free.
NOTE! The counter is incremented on receipt of the request for HR
TCH, regardless of whether the request is set in the queue, pre-
empted, subjected to directed retry or some other procedure of the
kind
Feature BSS5010 Half Rate
Number
Name
Release
001122
TCH REJ DUE REQ CH A IF CRC
S5
Trigger points See figure TCH assignment failure with cause switch_circuit_pool
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Number
Name
Release
001122
TCH REJ DUE REQ CH A IF CRC
S5
Description Number of requests for TCHs that are rejected because of a mismatch
between the types of the requested channel and the A interface
circuit, whether queuing occurred or not.
Updated When the RRM changes the A interface circuit pool before TCH
allocation.
Dependencies with other
counters/PI(s)
Counter 001011 and counter 001118 or 001119 are updated along
with this counter.
Feature BSS5010 Half Rate
Number
Name
Release
001123
FULL TCH REQ FACCH CALL
S5
Trigger points See figures:
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion, no free TCH
channel
Description Number of requests for FR TCH in FACCH call setup during SDCCHcongestion (both successful and unsuccessful).
Updated When the RRM receives a request for SDCCH allocation but no idle
SDCCHs exist and TCH allocation (=FACCH call setup) is allowed in
the request which also indicates that the TCH rate should be FR.
Dependencies with other
counters/PI(s)
Counters 001010, 001043 and 001098 are updated along with this
counter.
Feature BSS5010 Half Rate
Number
Name
Release
001124
TCH FACCH CALL CH RATE NOT DEF
S5
Trigger points See figures:
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion, no free TCH
channel
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Number
Name
Release
001124
TCH FACCH CALL CH RATE NOT DEF
S5
Description Number of requests for TCHs in FACCH call setup during SDCCH
congestion when the TCH rate is not defined to be uniquely FR or HR
(both successful and unsuccessful).
Updated When the RRM receives a request for SDCCH allocation but no idle
SDCCHs exist and TCH allocation (=FACCH call setup) is allowed in
the request which also indicates that either of the two possible
channel rates is accepted to be allocated.
Dependencies with other
counters/PI(s)
Counters 001010, 001043 and 001098 are updated along with this
counter.
Feature BSS5010 Half Rate
Number
Name
Release
001125
SUCC FULL TCH SEIZ FACCH CALL
S5
Trigger points See figure FACCH call setup because of SDCCH congestion with
counters
Description Number of successful FR TCHs seizures for a FACCH call setup.
Updated When the RRM allocates an FR TCH as a response to an SDCCH
request as part of the FACCH call setup during SDCCH congestion.
Dependencies with other
counters/PI(s)
Counter 001044 is updated along with this counter.
Feature BSS5010 Half Rate
Number
Name
Release
001126
SUCC HALF TCH SEIZ FACCH CALL
S5
Trigger points See figure FACCH call setup because of SDCCH congestion with
counters
Description Number of successful HR TCHs seizures for a FACCH call setup.
Updated When the RRM allocates an HR TCH as a response to an SDCCH
request as part of the FACCH call setup during SDCCH congestion.
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Number
Name
Release
001126
SUCC HALF TCH SEIZ FACCH CALL
S5
Dependencies with other
counters/PI(s)
Counter 001044 is updated along with this counter.
Feature BSS5010 Half Rate
Number
Name
Release
001127
ENDED DUE TRANSC FR RATE 1
S5
Trigger points See figures:
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. Unsuccessful internal intra-cell handover
Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech FR version 1 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or
001031 is updated and the FR codec version 1 is in use.
Feature BSS5010 Half Rate
Number
Name
Release
001128
ENDED DUE TRANSC FR RATE 2
S5
Trigger points See figures:
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. Unsuccessful internal intra-cell handover
Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech FR version 2 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or
001031 is updated and the FR codec version 2 is in use.
Feature BSS5010 Half Rate
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Number
Name
Release
001129
ENDED DUE TRANSC FR RATE 3
S5
Trigger points See figures:
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. Unsuccessful internal intra-cell handover
Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech FR version 3 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or
001031 is updated and the FR codec version 3 is in use.
Feature BSS5010 Half Rate
Number
Name
Release
001130
ENDED DUE TRANSC HR RATE 1
S5
Trigger points See figures:
. CONNECTION_FAILURE message with cause transcoder_failure
during a call . Unsuccessful internal intra-cell handover
Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech HR version 1 is in use.
Updated When one of the transcoder failure counters 001029, 001030, or
001031 is updated and the HR codec version 1 is in use.
Feature BSS5010 Half Rate
Number
Name
Release
001131
ENDED DUE TRANSC HR RATE 2
S5
Trigger points See figures:
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. Unsuccessful internal intra-cell handover
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Number
Name
Release
001131
ENDED DUE TRANSC HR RATE 2
S5
Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech HR version 2 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or
001031 is updated and the HR codec version 2 is in use.
Feature BSS5010 Half Rate
Number
Name
Release
001132
ENDED DUE TRANSC HR RATE 3
S5
Trigger Points See figures:
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. Unsuccessful internal intra-cell handover,
CONNECTION_FAILURE message with cause
remote_transcoder_failure comes to the target channel
Description Number of radio TCH transactions that are ended because of a
transcoder failure when speech HR version 3 is in use.
Updated When one of the transcoder failure counters 001029, 001030 or
001031 is updated and the HR codec version 3 is in use.
Feature BSS5010 Half Rate
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Number
Name
Release
001133
FULL TCH TR FAIL
S5
Trigger points See figures:
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure, MSC sends CLEAR_COMMAND
message
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Total number of FR TCH transaction failures.
Updated When an FR TCH transaction ends because of any abnormal reason,
that is, some specific failure counter has been updated, and the RRM
releases the FR TCH.
Feature BSS5010 Half Rate
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Number
Name
Release
001134
HALF TCH TR FAIL
S5
Trigger points See figures:
. Unsuccessful TCH activation
. Unsuccessful TCH activation
. TCH assignment failure
. TCH assignment failure, MSC sends CLEAR_COMMAND
message
. CONNECTION_FAILURE message with cause transcoder_failure
during a call
. TRX or TSL is blocked with different causes during a call
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover
. Unsuccessful internal intra-cell handover, timer expires on the
source channel
. Unsuccessful internal inter-cell handover
. Unsuccessful external handover, source BSC
. Unsuccessful external handover, MS sends a handover failure
. Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Total number of HR TCH transaction failures.
Updated When an HR TCH transaction ends because of any abnormal reason,
that is, some specific failure counter has been updated, and the RRM
releases the HR TCH.
Feature BSS5010 Half Rate
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Number
Name
Release
001135
SDCCH SEIZ ATT FOR MOC
S6
Trigger points See figures:
. Basic call with counters
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion, no free TCH
channel
. SDCCH congestion, FACCH call setup is not activated
. Successful SDCCH internal intra-cell handover
. Successful SDCCH internal inter-cell handover
. Reconfiguration from TCH to SDCCH
Description Number of SDCCH seizure attempts for an MOC. In case of an
external handover and handovers after external handover this counter
is not incremented. In case of an intra-cell or inter-cell (SDCCH to
SDCCH) handover this counter is updated.
Updated When the RRM receives a request for a SDCCH from an MS because
the MS needs a channel for a MOC. Note that this counter contains
all requests for an SDCCH in originating direction, for example Mobile
Originating calls, Location Updates, Supplementary Service requests
and SMS on SDCCH. In case of an SMS this counter is triggered
even if the SMS would eventually be sent on TCH instead of SDCCH.
Dependencies with other
counters/PI(s)
Counter 001000 is updated along with this counter.
Number
Name
Release
001136
SDCCH SEIZ ATT FOR MTC
S6
Trigger points See figures:
. Basic call with counters
.
FACCH call setup because of SDCCH congestion with counters. FACCH call setup because of SDCCH congestion, no free TCH
channel
. SDCCH congestion, FACCH call setup is not activated
. Successful SDCCH internal intra-cell handover
. Successful SDCCH internal inter-cell handover
. Reconfiguration from TCH to SDCCH
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Number
Name
Release
001136
SDCCH SEIZ ATT FOR MTC
S6
Description Number of SDCCH seizure attempts for an MTC. In case of an
external handover and handovers after external handover this counter
is not incremented. In case of an intra-cell or inter-cell (SDCCH to
SDCCH) handover this counter is updated.
Updated When the RRM receives a request for a SDCCH from an MS as the
MS needs a channel for a MTC. Note that this counter contains all
requests for an SDCCH in terminating direction, for example Mobile
Terminating calls and SMS on SDCCH. In case of an SMS this
counter is triggered even if the SMS would eventually be sent on TCH
instead of SDCCH.
Dependencies with other counters/PI(s)
Counter 001000 is updated along with this counter.
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Number
Name
Release
001137
TCH SEIZ ATT FOR MOC
S6
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion, no free TCH
channel
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful forced release
. Unsuccessful forced release
. Successful forced handover
. Unsuccessful forced handover
Description Number of TCH seizure attempts during an MOC, in call setup phase
before connection acknowledgement. In case of an external handover
and handovers after external handover this counter is not
incremented. In case of an intra-cell or inter-cell (TCH to TCH or
SDCCH to TCH) handover this counter is updated.
Updated When RRM receives requests for a TCH for an MOC. In FACCH call
setup RRM attempts to allocate a TCH as a response to a request for an SDCCH seizure during SDCCH congestion.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
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Number
Name
Release
001138
TCH SEIZ ATT FOR MTC
S6
Trigger points See figures:
. Basic call with counters
. Basic call with priority subscriber
. FACCH call setup because of SDCCH congestion with counters
. FACCH call setup because of SDCCH congestion, no free TCH
channel
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Successful TCH queuing
. Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful trunk reservation
. Successful internal intra-cell handover
. Internal intra-cell HO, successful TCH queuing
. Unsuccessful underlay overlay internal intra-cell handover,
queuing not allowed
. Internal intra-cell handover, unsuccessful TCH queuing
. Internal directed retry
. Successful internal inter-cell handover
. Successful forced release
. Unsuccessful forced release
. Successful forced handover
. Unsuccessful forced handover
Description Number of TCH seizure attempts during an MTC, in call setup phase
before connection acknowledgement. In case of an external handover
and handovers after external handover this counter is not
incremented. In case of an intra-cell or inter-cell (TCH to TCH or
SDCCH to TCH) handover this counter is updated.
Updated When RRM receives requests for a TCH for an MTC. In FACCH call
setup RRM attempts to allocate a TCH as a response to a request for an SDCCH seizure during SDCCH congestion.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
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Number
Name
Release
001139
TCH REL because of RADIO FAIL
S6
Trigger points See figure Timer T3107 expires while waiting for
ASSIGNMENT_COMPLETE message
Description Number of TCH releases because of radio failures, in call setup phase
before connection acknowledgement. This counter is also updated in
an intra-cell or inter-cell handover, if the TCH is released because of a
radio failure before the conversation phase (handover is started and it
fails before a connection acknowledgement message is received).
Updated When a TCH is released because of a radio failure.
Dependencies with other
counters/PI(s)
Counter 001013 is updated along with this counter.
Number
Name
Release
001140
TCH REL DUE TO BSS FAIL
S6
Trigger points See figures:
. Unsuccessful TCH activation
. TCH assignment failure, MSC sends CLEAR_COMMAND
message
Description Number of TCH releases because of BSS failures, in call setup phase
before connection acknowledgement. This counter is also updated in
intra-cell or inter-cell handover, if the TCH is released because of BSS
problems before conversation phase (handover is started and fails
before connection acknowledgement message is received).
Updated When a TCH is released because of BSS problems.
Dependencies with other
counters/PI(s)
Counter 001012 is updated along with this counter.
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Number
Name
Release
001141
TCH SEIZ FAILS DUE TO CONG
S6
Trigger points See figures:
. FACCH call setup because of SDCCH congestion, no free TCH
channel
. Basic call, no free TCH and queuing or directed retry is not
allowed
. Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated
. TCH assignment failure with cause switch_circuit_pool
. Unsuccessful forced release
. Unsuccessful forced handover
Description Number of TCH seizure failures because of congestion during call
setup before connection acknowledgement. This counter is also
updated in intra-cell or inter-cell handover, if the TCH attempt fails
because of congestion before conversation phase (handover is
started and fails before connection acknowledgement message is
received). In case of an external handover and handovers after
external handover this counter is not incremented.
Updated When RRM rejects a TCH request because of congestion. This
counter is updated only in these DX phases: MM Signalling (2), Basic
Assignment (3), FACCH Assignment (5) or Ciphering (8).
Dependencies with other
counters/PI(s)
Counter 001011 is updated along with this counter.
Number
Name
Release
001142
QUEUED URGENT HANDOVER ATTEMPTS
S6
Trigger points See figures:
. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
Description Number of queued urgent handover attempts.
Updated When a TCH request for an urgent handover attempt is put to the
queue because of a lack of available TCH resources requested.
Dependencies with other
counters/PI(s)
Counters 001010 and 001064 are updated along with this counter.
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Number
Name
Release
001142
QUEUED URGENT HANDOVER ATTEMPTS
S6
Feature BSS6115 Radio Channel Allocation Enhancements
Number
Name
Release
001143
AVE QUE TIME OF URGENT HO ATTEMPTS
S6
Trigger points See figures:
. Internal intra-cell HO, successful TCH queuing
.
Internal intra-cell handover, unsuccessful TCH queuing
Description Numerator of average queuing time of queued urgent handover
attempts (unit of the value is 10 ms).
Updated When a TCH request for an urgent handover attempt is removed from
the queue (both in a successful and an unsuccessful case).
Dependencies with other
counters/PI(s)
In a successful case counters 001008, 001022 and 001144 are
updated along with this counter. In an unsuccessful case counters
001022, 001025, 001068 and 001144 are updated along with this
counter.
Feature BSS6115 Radio Channel Allocation Enhancements
Logical type Average
Unit 10 ms
Number
Name
Release
001144
QUE DENOMINATOR 4
S6
Trigger points See figures:. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
Description Denominator of average queuing time of queued urgent handover
attempts.
Updated Every 20 seconds. The averaging is made within the measurement
period.
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Number
Name
Release
001144
QUE DENOMINATOR 4
S6
Dependencies with other
counters/PI(s)
Counter 001143 is updated along with this counter.
Feature BSS6115 Radio Channel Allocation Enhancements
Number
Name
Release
001145
AVE QUE TIME OF NON URGENT HO ATTEMPTS
S6
Trigger points See figures:
. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
Description Numerator of average queuing time of queued non-urgent handover
attempts.
Updated When a TCH request for a non-urgent HO attempt is removed from
the queue (both in a successful and unsuccessful case).
Dependencies with other
counters/PI(s)
In a successful case counters 001008, 001022 and 001146 are
updated along with this counter. In an unsuccessful case counters
001022, 001025, 001068 and 001146 are updated along with thiscounter.
Feature BSS6115 Radio Channel Allocation Enhancements
Logical type Average
Number
Name
Release
001146
QUE DENOMINATOR 5
S6
Trigger points See figures:
. Internal intra-cell HO, successful TCH queuing
. Internal intra-cell handover, unsuccessful TCH queuing
Description Denominator of average queuing time of queued urgent HO attempts
(unit of the value is 10 ms).
Updated Every 20 seconds. The averaging is made with the measurement
period.
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Number
Name
Release
001146
QUE DENOMINATOR 5
S6
Dependencies with other
counters/PI(s)
Counter 001145 is updated along with this counter.
Feature BSS6115 Radio Channel Allocation Enhancements
Unit 10 ms
Number
Name
Release
001147
QUEUED URG HO ATTS NOT SERVED
S6
Trigger points See figure Internal intra-cell handover, unsuccessful TCH queuing
Description Number of queued urgent handover attempts not served.
Updated When the urgent HO attempt is removed from the queue because of
queuing timer expiry or substitution by a higher priority queuing item.
Dependencies with other
counters/PI(s)
Counters 001022, 001025, 001068 and 001143 are updated along
with this counter.
Feature BSS6115 Radio Channel Allocation Enhancements
Number
Name
Release
001148
MS SUCC TCH SEIZURE FOR ASSIGNMENT COMPLETE
S7
Trigger points See figure Normal call
Description Number of times when a MS is successfully on the TCH after an
ASSIGNMENT_COMPLETE message.
Updated When an ASSIGNMENT_COMPLETE message is received from the
MS via BTS to TCH. The TCH is reserved and the MS is moved from
the SDCCH to the TCH. This counter is updated only when a call is
established for the first time, not during handovers.
This counter is not updated with softwares FACCH call setup because
of SDCCH congestion, directed retry procedure in BSC, TCH
assignment to super reuse TRX in IUO and direct access to super re-
use TRX in IUO.
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Number
Name
Release
Definition updated
001149
CALLS ENDED BY USER DURING DADL/B SETUP
S7
S11.5
Description Number of CALLS RELEASED BY USER in a call setup phase during
DADL/B handover.
Updated When the user releases the call in call setup phase and BSC has
started to evaluate the potential target cells for DADL/B handover.
Number Name
Release
001150SUCC TCH SEIZ WHEN GOOD QUAL IN ADJACENTS
S8
Trigger points See figure Basic call. Optional software dynamic hotspot is activated
Description Number of TCH requests that are accepted by the dynamic hotspot
algorithm when there is good signal quality in adjacent cells.
Updated When a TCH request is accepted by the dynamic hotspot algorithm
and the signal quality in all adjacent cells is above the threshold
GoodQualLimit and the traffic intensity in the source cell is above the
threshold SoftBlockingStart.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7019 Dynamic Hotspot
Number
Name
Release
001151
TCH REQ REJ DUE TO BAD QUALITY IN ADJACENT
S8
Trigger points See figure Basic call. Optional software dynamic hotspot is activated
Description Number of TCH requests rejected by the dynamic hotspot algorithm
because of bad signal quality in an adjacent cell.
Updated When a TCH request is rejected by the dynamic hotspot algorithm
and the signal quality in at least one adjacent cell is below the
threshold BadQualLimit and the traffic intensity in the source cell is
above the threshold SoftBlockingStart.
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Number
Name
Release
001151
TCH REQ REJ DUE TO BAD QUALITY IN ADJACENT
S8
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7019 Dynamic Hotspot
Number
Name
Release
001152
SUCC TCH SEIZ WHEN QUAL BETW GOOD AND BAD IN
ADJACENT
S8
Trigger points See figure Basic call. Optional software dynamic hotspot is activated
Description Number of TCH requests accepted by the dynamic hotspot algorithm
when the signal quality is between good and bad in adjacent cells.
Updated When a TCH request is accepted by the dynamic hotspot algorithm
and the signal quality in all adjacent cells is above the threshold
BadQualLimit, in at least one adjacent cell below the threshold
GoodQualLimit, and the traffic intensity in source cell is above the
threshold SoftBlockingStart.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7019 Dynamic Hotspot
Number
Name
Release
001153
TCH REQ REJ WHEN QUAL BETW GOOD AND BAD IN
ADJACENT
S8
Trigger points See figure Basic call. Optional software dynamic hotspot is activated
Description Number of TCH requests that are rejected by the dynamic hotspot
algorithm when the signal quality is between good and bad in adjacent
cells.
Updated When a TCH request is rejected by the dynamic hotspot algorithm
and the signal quality in all adjacent cells is above the threshold
BadQualLimit, in at least one adjacent cell below the threshold
GoodQualLimit, and the traffic intensity in the source cell is above the
threshold SoftBlockingStart.
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Number
Name
Release
001153
TCH REQ REJ WHEN QUAL BETW GOOD AND BAD IN
ADJACENT
S8
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7019 Dynamic Hotspot
Number
Name
Release
001154
DYNAMIC SDCCH RECONFIGURATION ATTEMPT
S7
Trigger points See figure Reconfiguration from TCH to SDCCH
Description Number of SDCCH reconfiguration attempts for immediate
assignment.
Updated When a SDCCH channel is needed for an immediate assignment and
no free SDCCHs are available and the request is sent for
reconfiguring a TCH channel to a SDCCH channel. This counter is not
updated if reconfiguration is done from SDCCH to TCH channel.
Dependencies with other
counters/PI(s)
Counters 001000 and 001007 are updated along with this counter.
Feature BSS7036 Dynamic SDCCH allocation
Number
Name
Release
001155
UNSUCC IMM ASS SDCCH ATTEMPT
S7
Trigger points See figure FACCH call setup because of SDCCH congestion with
counters
Description Number of unsuccessful SDCCH allocation attempts for immediate
assignment.
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Number
Name
Release
001155
UNSUCC IMM ASS SDCCH ATTEMPT
S7
Updated When the SDCCH channel allocation does not succeed because of a
lack of SDCCH resources at the time of the immediate assignment.
When SDCCH is released with the dx-cause rtsl_reconf_fail_c.
Triggered for example when a dynamic SDCCH allocation (1154
DYNAMIC_SDCCH_RECONFIGURATION_ATTEMPT) is tried but it
fails. Failure can be caused for example by the following situations.
. In the BCSU there cannot be more SDCCH allocated.
. All TCHs are busy and cannot be reallocated.
. RRM has reconfigured a TCH to SDCCH but ABI cannot do the
same. In this case the dynamic SDCCH seized by RRM is
released with cause rtsl_reconf_fail and the call attempt fails
(blocking).
Dependencies with other
counters/PI(s)
Counter 001001 is updated along with this counter.
Feature BSS7036 Dynamic SDCCH allocation
Number
Name
Release
001156
HSCSD TCH REQ WITH 14,4
S7
Trigger points See figures:
. Mobile originated HSCSD call setup
. Successful internal inter-cell handover
Description Number of TCH requests for 14.4 kbit/s data.
NOTE! Despite its name, this counter is not related to High Speed
Circiuit Switched Data (HSCSD), but the single slot 14.4 kbit/s data
services.
Updated When the RRM receives a TCH request for a single slot 14.4 kbit/s
data connection in a call or a handover attempt.
Dependencies with other
counters/PI(s)
Counters for a TCH request.
Feature BSS7037 14.4 kbit/s data services
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Number
Name
Release
001157
HSCSD SUCC TCH SEIZ WITH 14,4
S7
Trigger points See figures:
. Mobile originated HSCSD call setup
. Successful internal inter-cell handover
Description Number of successful TCH seizures for 14.4 kbit/s data.
NOTE! Despite of its name, this counter is not related to High Speed
Circiuit Switched Data (HSCSD), but the single slot 14.4 kbit/s data
services.
Updated When the RRM allocates a TCH/F as a response to a single slot 14.4kbit/s request in a call or handover attempt.
Dependencies with other
counters/PI(s)
Counters for a successful TCH seizures.
Feature BSS7037 14.4 kbit/s data services
Number
Name
Release
001158
HSCSD TRANSP TCH REQ
S7
Trigger points See figures:
. Mobile originated HSCSD call setup
. Successful internal inter-cell handover
Description Number of transparent HSCSD TCH requests.
Updated When TCH/F(s) is / are requested for a transparent HSCSD service
from the RRM in a call or a handover attempt.
Dependencies with other
counters/PI(s)
Counter 001160 or 001161 is updated along with this counter.
Feature BSS7003 High speed circuit switched data
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Number
Name
Release
001159
HSCSD SUCC TRANSP TCH SEIZ
S7
Trigger points See figures:
. Mobile originated HSCSD call setup
. Successful internal inter-cell handover
Description Number of successful transparent HSCSD TCH seizures.
Updated When TCH/F has been successfully allocated for transparent HSCSD
service by RRM. Incrementation is made only by the HSCSD main
channel allocation.
Dependencies with other
counters/PI(s)
Counter 001162 or 001163 is updated along with this counter.
Feature BSS7003 High speed circuit switched data
Number
Name
Release
001160
HSCSD REQ FOR CALL SETUP
S7
Trigger points See figure Mobile originated HSCSD call setup
Description Number of HSCSD TCH requests for a call set-up.
Updated When the HSCSD data connection is requested from the RRM in a
call attempt.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7003 High speed circuit switched data
Number
Name
Release
001161
HSCSD TCH REQ FOR HO
S7
Trigger points See figure Successful internal inter-cell handover
Description Number of HSCSD TCH requests for a HO.
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Number
Name
Release
001161
HSCSD TCH REQ FOR HO
S7
Updated When the HSCSD data connection is requested from the RRM in a
handover attempt.
Dependencies with other
counters/PI(s)
Counter 001010 is updated along with this counter.
Feature BSS7003 High speed circuit switched data
Number
Name
Release
001162
HSCSD SUCC TCH SEIZ FOR CALL SETUP
S7
Trigger points See figure Mobile originated HSCSD call setup
Description Number of successful HSCSD TCH seizures for a call set-up.
Updated When the RRM allocates a main HSCSD TCH/F as a response to an
HSCSD call attempt.
Dependencies with other
counters/PI(s)
Counter 001009 is updated along with this counter.
Feature BSS7003 High speed circuit switched data
Number
Name
Release
001163
HSCSD SUCC TCH SEIZ FOR HO
S7
Trigger points See figure Successful internal inter-cell handover
Description Number of successful HSCSD TCH seizures for a HO.
Updated When the RRM allocates a main HSCSD TCH/F as a response to a
handover attempt.
Dependencies with other
counters/PI(s)
Counter 001008 is updated along with this counter.
Feature BSS7003 High speed circuit switched data
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Number
Name
Release
001164
HSCSD CON REL DUE TO FAIL
S7
Trigger points See figure A CONNECTION_FAILURE message which comes during
an HSCSD
Description Number of HSCSD connection releases because of a failure.
Updated When the HSCSD main TCH/F is released with dx_cause indicating a
failure.
Feature BSS7003 High speed circuit switched data
Impact HO failure, Call cleared
Number
Name
Release
001165
SUCCESS TCH SEIZURE FOR DIRECT ACCESS
S7
Trigger points See figure Internal intra-cell direct access from a regular DCCH to the
super-reuse TRX
Description Number of successful seizures for a TCH in direct accesses to a
super-reuse TRX during the call setup phase.
Updated When the RRM allocates a TCH as a response to a TCH request in a
call attempt using direct access to a super-reuse TRX procedure.
Dependencies with other
counters/PI(s)
Counters 001009 and 001091 are updated along with this counter.
Feature BSS7057 Direct access to super re-use TRX in IUO
Number
Name
Release
001166
TCH REQUEST FOR DIRECT ACCESS REJECTED DUE TO
LACK
S7
Trigger points See figure Unsuccessful internal intra-cell direct access from regular
DCCH to the super-reuse TRX
Description Number of requests for a direct access to a super-reuse TRX that are
rejected because of a lack of resources during the call setup phase.
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Number
Name
Release
001166
TCH REQUEST FOR DIRECT ACCESS REJECTED DUE TO
LACK
S7
Updated When the RRM has no TCHs available for assignment requests in a
direct access attempt to a super-reuse TRX.
Dependencies with other
counters/PI(s)
Counters 001011 and 001092 are updated along with this counter.
Feature BSS7057 Direct access to super re-use TRX in IUO
Number
Name
Release
001167
TCH REQUEST FOR A BSC CONTROLLED TRHO
PROCEDURE
S8
Trigger points See figure Successful BSC controlled TRHO
Description Number of TCH requests for a BSC-controlled TRHO procedure.
Updated When the RRM receives a TCH request in a BSC-controlled TRHO
attempt
Feature BSS8123 Advanced Multilayer Handling
Number
Name
Release
001168
SUCC TCH SEIZ FOR A BSC CONTROLLED TRHO
S8
Trigger points See figure Successful BSC controlled TRHO
Description Number of successful TCH seizures for a BSC-controlled TRHO
Updated When the RRM allocates a TCH as a response to a TCH request in aBSC-controlled TRHO attempt.
Feature BSS8123 Advanced Multilayer Handling
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Number
Name
Release
001169
REJ TCH SEIZ FOR A BSC CONTROLLED TRHO DUE
LACK OF RESOURCES
S8
Trigger points See figure Unsuccessful BSC controlled TRHO
Description Number of rejected TCH requests for a BSC-controlled TRHO
procedure because of exceeded load in the target cell.
Updated When the RRM rejects traffic channel allocation because of exceeded
load in the target cell in a BSC-controlled TRHO.
Feature BSS8123 Advanced Multilayer Handling
Number
Name
Release
001170
SUCCESSFUL TCH SEIZURES FOR DADLB HO
S8
Trigger points See figure Successful handover because of DADL/B
Description The number of successful TCH seizures because of DADL/B
handover.
Updated The counter is updated when a TCH allocation in the target cell during
DADL/B handover is successful. BSC internal handover case.
Feature BSS8032 Direct Access to Desired Layer/band
Number
Name
Release
001171
TCH REQUEST IN DADLB HO REJECTED
S8
Trigger points See figure Unsuccessful DADL/B handover because of lack of
resources
Description Number of TCH requests in DADL/B handover rejected because of a
lack of TCH.
Updated The counter is updated when a TCH allocation in the target cell during
DADL/B handover is unsuccessful because of lack of TCH. BSC
internal handover case.
Feature BSS8032 Direct Access to Desired Layer/band
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Number
Name
Release
001172
DADLB START DUE TO EXCEEDED LOAD
S8
Trigger points See figures:
. Successful handover because of DADL/B
. Unsuccessful DADL/B handover because of lack of resources
Description Number of DADL/B handover attempts, started because of exceeded
load in accessed cell.
Updated This counter is updated when channel request is rejected because of
excessive load and Radio Resource management requests a DADL/B
handover. If the target cell is found within MaxTimeLimitDR, the
DADL/B handover is started and also the counter 4129 is updated. If
this timer triggers the DADL/B handover is not started.
Dependencies with other
counters/PI(s)
004129 is updated if DADL/B HO is started.
Feature BSS8032 Direct Access to Desired Layer/band
Number
Name
Release
001173
REMOVAL FROM QUE DUE TO DR
S8
Trigger points See figure Internal directed retry
Description Number of requests removed from the queue because of start of DR.
Updated This counter is updated when a request is removed from the queue by
the RRM because of the start of DR.
Number
Name
Release
001174
GPRS TER UPGRD REQ
S9
Description Number of territory upgrade requests received from the Packet
Controller Unit.
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Number
Name
Release
001174
GPRS TER UPGRD REQ
S9
Updated When the Radio Resource Management receives from the Packet
Controller Unit a request for new radio time slots to be added into the
GPRS territory. The PCU can request an upgrade after BSC has
fulfilled the default territory defined by the operator parameters.
The upgrade of the GPRS territory may be started for various
reasons, for example when GPRS is set enabled in a BTS, GPRS-
TRX is created or deblocked, TSL inside the GPRS territory is
deblocked or CS load decreases, but this counter is not triggered in
these cases.
NOTE! This counter is triggered only when GPRS Territory Upgrade is
started by Packet Switched Radio Resource Management requesting
additional GPRS capacity.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
Number
Name
Release
001175
INCOMPL SERV GPRS TER UPGR REQ
S9
Description Number of territory upgrade requests that have been served with less
radio time slots than requested.
Updated WhenRadio Resource Management upgrades the GPRS territory with
less RTSLs than the Packet Controller Unit requested for.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
Number
Name
Release
001176
GPRS TER UG REJ DUE CSW TR
S9
Description Number of territory upgrade requests that have been rejectedbecause of the high load of the circuit switched traffic.
Updated When Radio Resource Management rejects a GPRS territory upgrade
request from the PCU because of high traffic load in BTS and
maintaining the margin of idle TCHs for circuit switched traffic does
not allow the upgrade.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
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Number
Name
Release
001177
GPRS TER UG REJ DUE LACK PSW RES
S9
Description Number of territory upgrade requests that have been rejected
because there are not enough resources capable of GPRS in the
BTS.
Updated When Radio Resource Management rejects a GPRS territory upgrade
request of the PCU because all TRXs capable of GPRS traffic are
already within the GPRS territory.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
Number
Name
Release
001178
GPRS TER UG REJ DUE LACK PCU CAP
S9
Description Number of territory upgrade requests that have been rejected
because the capacity of the Packet Controller Unit the BTS is
connected to is already totally in use.
Updated When Radio Resource Management rejects a GPRS territory upgrade
request from the PCU because the maximum number of TSLs, which
the PCU is capable to handle are already in use.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
Number
Name
Release
001179
GPRS TER DG DUE INC IN CSW TR
S9
Description Number of GPRS territory downgrades made because of the increase
in the circuit switched traffic load.
Updated When the Radio Resource Management starts a GPRS territory
downgrade in order to maintain the margin of idle TCHs for circuit
switched traffic after a circuit switched channel allocation, or when the
BSC during TCH congestion in the CSW territory directly allocates a
TCH belonging to the GPRS territory.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
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Number
Name
Release
001180
GPRS TER UG DUE DEC CSW TR
S9
Description Number of GPRS territory upgrades made to fulfill the default GPRS
territory as a consequence of decrease in the circuit switched traffic
load.
Updated When the Radio Resource Management starts a GPRS territory
upgrade in order to fulfill the defined default GPRS territory after the
traffic load in the BTS has decreased as a consequence of a circuit
switched channel release.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
Number
Name
Release
001181
GPRS TER DOWNGRADE REQ
S9
Description Number of territory downgrade requests received from the Packet
Controller Unit.
Updated When the Radio Resource Management receives from the Packet
Controller Unit a request for a GPRS territory downgrade. The PCU
can request for a downgrade for GPRS RTSLs beyond the defaultterritory defined by the operator parameters. A GPRS territory
downgrade is initiated because of increase of CS load. PCU can
initiate GPRS resource downgrade to additional GPRS resources. For
example, when PCU has previously requested GPRS territory
upgrade and additional channels has been given for GPRS use.
When there is no more need for additonal GPRS capacity PCU
requests for downgrade, the additional channels are removed from
GPRS territory and this counter is triggered.
Feature BSS9006 GPRS Telecom in BCSU and MCMU
Number
Name
Release
001182
FULL TCH SEIZ INTRA AMR HO
S10
Description Number of successful FR TCH seizures for an intra-cell HO when the
channel rate changes and AMR speech codecs are in use.
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Number
Name
Release
001182
FULL TCH SEIZ INTRA AMR HO
S10
Updated When the Radio Resource Management allocates a FR TCH for intra-
cell HO as a response to a TCH request and the channel rate is
changed from HR to FR and speech codec versions 3 are in use.
Dependencies with other
counters/PI(s)
Counter 001116 is updated along with this counter.
Feature BSS10004 Adaptive Multi Rate Codec
Number
Name
Release
001183
HALF TCH SEIZ INTRA AMR HO
S10
Description Number of successful HR TCH seizures for intra-cell HO when the
channel rate changes and AMR speech codecs are in use.
Updated When the Radio Resource Management allocates a HR TCH for
intra-cell HO as a response to a TCH request and the channel rate is
changed from FR to HR and speech codec versions 3 are in use.
Dependencies with other
counters/PI(s)
Counter 001117 is updated along with this counter.
Feature BSS10004 Adaptive Multi Rate Codec
Number
Name
Release
001184
TCH CALL REQ FOR AMR
S10
Description Number of TCH requests for an AMR call.
Updated When the Radio Resource Management receives a TCH request in a
call setup or HO attempt and speech codec version 3 is the most
preferred one.
Dependencies with other
counters/PI(s)
Counter 001026 is updated along with this counter.
Feature BSS10004 Adaptive Multi Rate Codec
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Number
Name
Release
001185
SUCCESSFUL AMR CODEC SET DOWNGRADES
S10
Description Number of successful AMR codec set downgrades during internal
HOs for the source side AMR codec set. Downgrade is made to align
the source side AMR codec set with the one chosen for the target side
in order to utilize the one-way downlink speech path connection for
the target side during the internal HO. The utilization of one-way
downlink speech path connection decreases the amount of muting
experienced in the speech path connection. Downgrade decision
during internal HO depends on the parameter AMR codec mode set
downgrades and upgrades enabled.
Updated By the Abis interface services after successful mode modifyprocedures for BTS and MS.
Feature BSS10004 Adaptive Multi Rate Codec
Number
Name
Release
001186
UNSUCCESSFUL AMR CODEC SET DOWNGRADES
S10
Description Number of unsuccessful AMR codec set downgrades during internal
HOs for the source side AMR codec set. Alignment between thesource side AMR codec set and the one chosen for the target side
has failed and usage of one-way speech path downlink connection for
the target side during the internal HO is not possible.
Updated By the Abis interface services after an unsuccessful mode modify
procedure for BTS or MS.
Feature BSS10004 Adaptive Multi Rate Codec
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Number
Name
Release
001187
SUCCESSFUL AMR CODEC SET UPGRADES
S10
Description Number of successful AMR codec set upgrades after internal HOs for
the target side AMR codec set. Upgrade is made to utilize the original
AMR codec set of the target BTS which set was not chosen for the
target side because of target side alignment with the source side
during internal HO. This alignment is made in order to utilize the one-
way downlink speech path connection for the target side during the
internal HO. The utilization of one-way speech path downlink
connection decreases the amount of muting experienced in the
speech path connection. Upgrade decision after internal HO depends
on the parameters AMR codec mode set downgrades and upgrades
enabled and AMR multirate configuration in handovers.
Updated By the Abis interface services after successful mode modify
procedures for BTS and MS.
Feature BSS10004 Adaptive Multi Rate Codec
Number
Name
Release
001188
UNSUCCESSFUL AMR CODEC SET UPGRADES
S10
Description Number of unsuccessful AMR codec set upgrades after internal HOs
for the target side AMR codec set. The target side continues to use
the currently used AMR codec set.
Updated By the Abis interface services after an unsuccessful mode modify
procedure for BTS or MS.
Feature BSS10004 Adaptive Multi Rate Codec
Number
Name
Release
001189
TCH REQ FOR 96 DAT CALL
S10
Description Number of TCH requests for 9.6 kbit/s data call.
Updated When the Radio Resource Management receives a TCH request for a
single slot 9.6kbit/s data connection in a call or a handover attempt.
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Number
Name
Release
001190
SUCC TCH SEIZ FOR 96 DAT CALL
S10
Description Number of successful TCH seizures for 9.6 kbit/s data call.
Updated When the Radio Resource Management allocates a TCH/F as a
response to a single slot 9.6kbit/s request in a call or handover
attempt.
Number
Name
Release
Definition updated
001191
SPARE001191
S10.5 ED
S11
Description Spare
Number
Name
Release
Definition updated
001192
SPARE001192
S10.5 ED
S11
Description Spare
Number
Name
Release
Definition updated
001193
SPARE001193
S10.5 ED
S11
Description Spare
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Number
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Definition updated
001194
TCH ACCESS REJECTED DUE LOW RXS10.5 ED
S11.5
Description Number of unsuccessful call setup attempts because of a too low RX
level.
Updated RRM updates the counter if a call setup fails because of a too low RX
level.
Number
Name
Release
001195
MSC O HO CMD
S11
Description Number of handover commands sent by BSC in an outgoing MSC-
controlled handover (SDCCH-SDCCH, TCH-TCH or SDCCH-TCH
HO)
Logical type Cumulative
Number
Name
Release
001196
BSC O HO CMD ASSGN
S11
Description Number of all handover commands or assignment commands sent by
BSC in an outgoing BSC-controlled handover (SDCCH-SDCCH, TCH-
TCH or SDCCH-TCH HO).
Logical type Cumulative
Number
Name
Release
001197
BTS HO ASSGN
S11
Description Number of assignment commands sent in intra-BTS handovers
(SDCCH-SDCCH, TCH-TCH or SDCCH-TCH).
Logical type Cumulative
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Number
NameRelease
001198
TCH REL DUE TO RADIO FAIL PH 9-11S11
Description Number of TCH releases because of radio failures, updated in phases
9-11 only (Outgoing handovers before CONNECT_ACK ). Same DX
causes as in counter 001139.
Logical type Cumulative
Number
Name
Release
001199
TCH REL DUE TO BSS FAIL PH 2-3
S11
Description Number of TCH releases because of BSS failures, updated in phases
2-3 only. Same DX causes as in counter 001140.
Logical type Cumulative
Number
Name
Release
001200
TCH REL DUE TO BSS FAIL PH 9-11
S11
Description Number of TCH releases because of BSS failures, updated in phases
9-11 only (Outgoing handovers before connect_ack). Same DX causes
as in counter 001140.
Logical type Cumulative
Number
Name
Release
001201
SDCCH FAIL PH 3
S11
Description Number of all the failures on SDCCH in phase 3 that do not trigger any
TCH failure counter in the same phase.
Logical type Cumulative
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Number
NameRelease
001202
DROP AFTER TCH ASSIGNS11
Description Number of dropped calls after the TCH is assigned.
Updated When the drop occurs between ASSIGNMENT_COMPLETE and
DISCONNECT .
Logical type Cumulative
Number
Name
Release
001203
ERROR IND DURING LU
S11
Description Number of Error indication messages received during the Location
Update procedure.
Logical type Cumulative
Number
Name
Release
001204
DROP TCH ASSCOMPL TO RFCH REL
S11.5
Description Number of TCH drops between the Assignment Complete and the RF
Channel Release messages.
Updated When the TCH transaction ends in a phase between the Assignment
Complete and the RF Channel Release messages.
Dependencies with other
counters
Some of the counters 001013, 001014, 001029, 001030, 001046,
001047, 001048, 001049, 001050, 001051, 001070, 001081, 001084,
001085, 001087, 001088, and 001202 may be updated together with
this counter.
Number
Name
Release
001205
TCH REL DUE RAD FAIL PH 2-3
S11.5
Description Number of the TCH releases because of the radio failures, updated in
phases 2-3 only . Same DX causes as in the counter 001139.
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Number
Name
Release
001205
TCH REL DUE RAD FAIL PH 2-3
S11.5Updated When the TCH is released in call phase 2 (MM signalling) or 3 (Basic
assignment) because of a radio failure.
Dependencies with other
counters
Counter 001139 is updated together with this counter.
Number
Name
Release
001206
TCH REL DUE RAD FAIL PH 12-14
S11.5
Description Number of the TCH releases because of radio failures, updated in
phases 12-14 only . Same DX causes as in the counter 001139.
Updated When the TCH is released during the Handover phases (12-14)
because of a radio failure.
Dependencies with other
counters
Counter 001139 is updated together with this counter.
Number Name
Release
001207TCH REL DUE BSS FAIL PH 12-14
S11.5
Description Number of the TCH releases because of the BSS failures, updated in
phases 12-14 only. Same DX causes as in the counter 001140.
Updated When the TCH is released during the Handover phases (12-14)
because of a BSS failure.
Dependencies with other
counters
Counter 001140 is updated together with this counter.
Number
Name
Release
001208
A IF CRC MISMATCH CALL SETUP
S11.5
Description Number of the TCH requests rejected because of the mismatch
between the types of the requested channel and the A interface circuit,
updated in call setup phase only.
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Number
Name
Release
001208
A IF CRC MISMATCH CALL SETUP
S11.5Updated When the RRM changes the A interface circuit pool before the TCH
allocation.
Dependencies with other
counters
Counter 001122 is updated together with this counter
Number
Name
Release
001209
GPRS TER DG REJ DUE STREAMING
S11.5
Description Number of the territory downgrade permission requests that have been
rejected because of the streaming traffic.
Updated Whenthe PCU rejects the downgrade permission request.
Feature BSS11111 Enhanced Quality of Service
Number
Name
Release
001210
GPRS TER DG REQ WHEN EQOS ON
S11.5
Description Number of the PS downgrade permission requests because of the CS
resources.
Updated The BSC updates the counter when a downgrade request is sent to the
PCU.
Feature BSS11111 Enhanced Quality of Service
Number
Name
Release
001211
TCH REL BSC BSC CONFLICT CALL
S11.5
Description Number of TCH releases because of a BSC-BSC conflict.
Updated When a TCH is released (with cause bc_t_bsc_bsc_conflict_c in
phases 1-8 or 15)
Feature BSS11052 Dynamic Frequency and Channel Allocation
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Number
NameRelease
001212
TCH REL BSC BSC CONFLICT TARGS11.5
Description Number of TCH releases because of a BSC-BSC conflict.
Updated When a TCH is released (with cause bc_t_bsc_bsc_conflict_c in
phases 12-14)
Feature BSS11052 Dynamic Frequency and Channel Allocation
Number
Name
Release
001213
GPRS TER UG REQ FROM CSW
S11.5
Description Number of territory upgrade requests to PCU initiated by the CSW.
Updated When the RRM initiates a PSW territory upgrade to the PCU.
Dependencies with other
counters
001214 and 001215
Feature BSS1109672 Dynamic Abis Enhancement
Number
Name
Release
001214
GPRS TER UG FROM CSW PARTIAL
S11.5
Description Number of territory upgrade requests from the CSW RRM to the PCU
that have been served with less radio time slots than requested, i.e.
partially successful PSW territory upgrade in the PCU.
Updated When the PCU upgrades the GPRS territory with less RTSLs than the
RRM requested for.
Dependencies with other
counters
001213
Feature BSS1109672 Dynamic Abis Enhancement
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Number
NameRelease
001215
GPRS TER UG FROM CSW FAILEDS11.5
Description Number of territory upgrade requests from the CSW RRM to the PCU
where the upgrade of the single new radio time slots to the PCU was
not successful.
Updated When the PCU rejects the whole PSW territory upgrade, i.e. no single
new RTSL was upgraded to the PCU.
Dependencies with other
counters
001213
Feature BSS1109672 Dynamic Abis Enhancement
Number
Name
Release
001216
SPARE001216
S11.5
Description Spare
Number
Name
Release
001217
SPARE001217
S11.5
Description Spare
Number
Name
Release
001218
SPARE001218
S11.5
Description Spare
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Number
NameRelease
001219
SPARE001219S11.5
Description Spare
Number
Name
Release
001220
SPARE001220
S11.5
Description Spare
Number
Name
Release
001221
SPARE001221
S11.5
Description Spare
Number Name
Release
001222SPARE001222
S11.5
Description Spare
Number
Name
Release
001223
SPARE001223
S11.5
Description Spare
Number
Name
Release
001224
SPARE001224
S11.5
Description Spare
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Number
NameRelease
001225
SPARE001225S11.5
Description Spare
Number
Name
Release
001226
SPARE001226
S11.5
Description Spare
Number
Name
Release
001227
SPARE001227
S11.5
Description Spare
Number Name
Release
001228SPARE001228
S11.5
Description Spare
Number
Name
Release
001229
SPARE001229
S11.5
Description Spare
Number
Name
Release
001230
SPARE001230
S11.5
Description Spare
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Related topics
1 Traffic Measurement
Signalling Charts of Traffic Measurement
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3 Signalling charts of Traffic Measurement
The following figures show the signalling charts of Traffic Measurement:
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Figure 1. Basic call without counters.
Immediate assign command
BSC:MS: BTS: MSC:
PagingPaging commandPaging request
Radio access part on CCCH
Paging part
Channel request Channel required
Channel activationChannel activation ack
Immediate assign
DDCH establishment part
Sabm Establish indication Paging response
Ciphering mode complete
SDCCH signalling part
SetupSetupCall proceeding Call proceeding
Assignment requestPhysical context requestPhysical context confirm
Channel activationChannel activation ack
Assignment command
TCH seized, FACCH signalling part
Ua
Sabm Establish indicationUa
Assignment complete Assignment completeRf channel release
Rf channel release ackAlert AlertConnect Connect
Connect ackConnect ack
Conversation phase
Release completeClear command
Clear completeChannel releaseDeactivate SACCH
DiscUa Release indication
Rf channel releaseRf channel release ack
Release by MS
Disconnect DisconnectReleaseRelease
Release complete
Authentification requestAuthentification requestAuthentification response Authentification response
Identification requestIdentification requestIdentification response Identification response
Ciphering mode commandEncryption commandCiphering mode commandCiphering mode complete
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Figure 2. Basic call with counters.
BTS: MSC:MS: BSC:
TCH succ req in norm assign 001009
Radio access part on CCCH
Paging part
Channel request Channel required
Channel activation
Physical context confirm
Channel activation
Basic call signalling continuos, see figure 1
Basic call signalling, see figure 1
SDCCH seiz att for MOCor SDCCH seiz att for MTC
001135
001136
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001114
001115
FR TCH succ seizor HR TCH succ seiz
001106
001107
SDCCH attempts 001000
SDCCH succ seiz for imm assign 001007
TCH requests 001010
TCH req for norm assign 001026
Ass req, que allowor Ass req, que not allow
001056
001057
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
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Figure 3. Basic call with priority subscriber.
BTS: MSC:BSC:
TCH req for norm assign 001026
TCH requests 001010
Physical context confirm
Channel activation
Basic call signalling continuos, see figure 1
Basic call signalling, see figure 1
001054
001055
Ass req that can cause forced relor Ass req that can cause forced HO
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
TCH req with prior subscriber 001095
001137
001138
FR TCH succ seizor HR TCH succ seiz
001106
001107
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001114
001115
TCH seiz att for MOCor TCH seiz att for MTC
TCH succ req in norm assign 001009
Succ TCH req with prior subscriber 001096
MS:
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Figure 4. FACCH call setup due to SDCCH congestion without counters.
BSC:MS: MSC:BTS:
Mode modify request
Channel request Channel required
Channel activation
Channel activation ack
Immediate assign command
Immediate assign
SetupSetup
Call proceeding Call proceeding
Assignment request
Mode modify ack
Channel mode modification
Channel mode modification ack
Assignment complete
Alert Alert
Connect Connect
Connect ackConnect ack
Channel mode modification
Channel mode modification ack
Conversation phase
Release by MS
DDCH establishment part
TCH, FACCH signalling part
Radio access part on CCCH
Paging part
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Figure 5. FACCH call setup due to SDCCH congestion with counters.
BTS: MSC:MS: BSC:
Unsucc imm ass SDCCH attempt 001155
SDCCH attempts 001000
TCH request 001010
Succ TCH seiz due SDCCH cong 001099
001044
Att to seize TCH due SDCCH cong 001098
TCH req for FACCH call set-up 001043
Seiz att with busy SDCCH 001001
Radio access part on CCCH
Paging part
Channel request Channel required
Channel activation
FACCH call set-up signalling, see figure 4
Succ FR TCH seiz in FACCH callset-upor Succ HR TCH seiz in FACCH callset-up
001125
001126
001135
001136
SDCCH seiz att for MOCor
SDCCH seiz att for MTC
001123
001124
001137
001138
Succ TCH seiz in FACCH callset-up
TCH seiz att for MOCor
TCH seiz att for MTC
FR TCH req for FACCH call set-upor TCH req for FACCH call set-up, chrt not def
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Figure 6. FACCH call setup due to SDCCH congestion, no free TCH channel.
Optional software directed retry is not activated.
BSC:
Unsucc imm ass SDCCH attempt 001155
TCH request rejected due to cong 001141
Att to seize TCH due SDCCH cong 001098
TCH req for FACCH call set-up 001043
TCH requests 001010
Seiz att with busy SDCCH 001001
SDCCH attempts 001000
MS: MSC:BTS:
Immediate assignment reject
Channel required
Radio access part on CCCH
Paging part
Channel request
No free TCH
001135
001136
SDCCH seiz att for MOCor
SDCCH seiz att for MTC
001123
001124
FR TCH req for FACCH call set-upor TCH req for FACCH call, ch rate notdef
001137
001138
TCH seiz att for MOC
or TCH seiz att for MTC
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
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Figure 7. Normal release.
Radio access part on CCCH
Paging part
DDCH establishment part
TCH seized, FACCH signalling part
Conversation phase
Release by MS
Disconnect DisconnectReleaseRelease
Release complete Release complete
Clear command
Channel release
Deactive sacch
Disc
Ua
Release indication
Rf channel rel
Rf channel rel ack
Clear complete
SDCCH signalling part
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
BSC:MS: MSC:BTS:
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Figure 8. Basic call, no free TCH and queuing or directed retry is not allowed.
BSC:
Ass req, queuing not allow 001057
TCH req for norm assign 001026
TCH requests 001010
Rej ass req, que not allow 001061
TCH req rej due to lack 001011
TCH req rej due to cong 001141
MS: MSC:BTS:
Assignment failure
Rf channel release
Rf channel release ack
Clear command
Channel release
Deactive sacchDisc
UaRelease indication
Clear complete
Physical context confirm
Basic call signalling, see figure 1
No free TCH and queueing or DR not allowed
TCH seiz att for MOCor TCH seiz att for MTC
001137
001138
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor
HR pref TCH requests
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
FR TCH req rej due to lackor HR TCH req rej due to lack
001118
001119
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Figure 9. Successful TCH queuing.
BTS: MSC:MS: BSC:
Queue denominator 2 001021
Ave queue time of call attempt 001020
TCH succ req in norm assign 001009
Ass req, queuing allowed 001056
TCH req for norm assign 001026
TCH requests 001010
Call att set in queue for TCH 001016
Queuing indication
Rf channel release
Rf channel release ack
Basic call signalling, see figure 1
TCH channel is released, request is taken from queue
Physical context confirm
Channel activation
Basic call signalling, see figure 1
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
TCH seiz att for MOCor TCH seiz att for MTC
001137
001138
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
FR TCH succ seizor HR TCH succ seiz
001106
001107
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001114
001115
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Figure 10. Basic call, no free TCHs, unsuccessful queuing and directed retry
not activated.
BSC:
001020
Call att in queue not served 001024
TCH req rej due to cong 001141
MS: MSC:BTS:
Assignment failure
Rf channel release
Rf channel release ack
Clear command
Channel release
Deactive sacchDisc
UaRelease indication
Clear complete
Physical context confirmBasic call signalling, see figure 1
No TCH released in time
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
Rej ass req, que allowed 001060
Call att set in queue for TCH 001016
TCH req rej due to lack 001011
Queuing indication
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
No free TCH, call is set in queue
Ass req, queuing allowed 001056
TCH seiz att for MOC
or TCH seiz att for MTC
001137
001138
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
TCH requests 001010
TCH req for norm assign 001026
Queue denominator 2 001021
Ave queue time of call attempt
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Figure 11. TCH assignment failure with cause switch_circuit_pool , queuing
and directed retry not allowed.
BTS: MSC:MS: BSC:
Ass req, que not allowed 001057
TCH requests 001010
Assignment failure
Clear command
Channel release
Deactive SACCH
Disc
Ua
Release indication
Rf channel release
Rf channel release ack
Physical context confirm
Clear complete
Basic call signalling, see figure 1
TCH req for norm assign 001026
001104
001105
FR pref TCH requestsor
HR pref TCH requests
001137
001138TCH seiz att for MOCor
TCH seiz att for MTC
TCH req rej due to lack 001011
Rej ass req, que not allow 001061
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
TCH req rej due change crct pool 001122
TCH req rej due to cong 001141
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Figure 12. Unsuccessful TCH activation.
BTS: MSC:MS: BSC:
Assignment failure
Clear command
Channel release
Deactive SACCH
Disc
Ua
Release indication
Clear complete
Basic call signalling, see figure 1
TCH activation fail 001028
SDCCH Rf channel rel
SDCCH Rf channel rel ack
Rf channel rel ack
Physical context request
Assignment request
Physical context confirm
Channel activation
Channel activation nack
Rf channel rel
Failure
TCH transact end due ch act fail 001081
001133
001134
FR TCH transactions failor HR TCH transactions fail
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001108
001109
001110
001111
001112
001113
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Figure 13. Unsuccessful TCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message.
MSC:BSC:BTS:MS:
TCH rel due BSS fail 001140
TCH transact end due BSS probl 001012
Start timer T9103
SDCCH Rf channel rel
SDCCH Rf channel rel ack
Rf channel rel ack
Assignment failure
Clear command
Channel release
Deactive SACCHDisc
UaRelease indication
Clear complete
Physical context request
Assignment request
Physical context confirm
Channel activation
Rf channel rel
Basic call signalling, see figure 1
TCH transact end due Abis fail 001045
TCH transact end due Abis fail 001084
001133
001134
FR TCH transactions failor HR TCH transactions fail
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or
HR TCH speech HR ver 3
Timer T9103 expires
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Figure 14. TCH assignment failure.
MSC:BSC:BTS:MS:
SDCCH Rf channel rel
SDCCH Rf channel rel ack
Assignment failure
Clear command
Channel release
Deactive SACCHDisc
UaRelease indication
Clear complete
Failure
TCH Rf channel rel ack
Assignment request
Assignment command
Assignment failure
TCH Rf channel release
Physical context request
Physical context confirm
Channel activation
Channel activation ack
Basic call signalling, see figure 1
SDCCH trans end due radio fail 001003
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001133
001134
FR TCH transactions fail
or HR TCH transactions fail
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Figure 15. TCH assignment failure, MSC sends CLEAR_COMMAND message.
MSC:BSC:BTS:MS:
SDCCH Rf channel relSDCCH Rf channel rel ack
TCH Rf channel rel ack
Radio access part on CCCH
Paging part
TCH seized, FACCH signalling part
Sabm
Disc
DDCH establishment part
Ua
Channel release
Release indication
TCH Rf channel release
Establish indicationClear command
Clear complete
Deactive SACCH
SDCCH signalling part
TCH transact end due BSS probl 001012
TCH transact end due A int fail 001051
TCH transact end due A int fail 001087
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or
HR TCH speech HR ver 2or HR TCH speech HR ver 3
001133
00113
FR TCH transactions failor HR TCH transactions fail
TCH rel due BSS fail 001140
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Figure 16. CONNECTION_FAILURE message with cause transcoder_failure
during a call.
MSC:BSC:BTS:MS:
Failure
TCH transact end due transc fail 001029
Rf channel rel ack
Conversation phase
Clear request
Disc
Ua
Channel release
Release indication
Rf channel release
Connection failure
Clear command
Clear complete
Deactive SACCH
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001127
001128
001129
001130
001131
001132
TCH transc fail FR speech ver 1or TCH transc fail FR speech ver 2or TCH transc fail FR speech ver 3or TCH transc fail HR speech ver 1or TCH transc fail HR speech ver 2or TCH transc fail HR speech ver 3
001133
001134
FR TCH transactions failor HR TCH transactions fail
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Figure 17. TRX or TSL is blocked with different causes during a call.
MSC:BSC:BTS:MS:
TCH transact end due LAPD fail 001046
TCH transact end due Abis fail 001045
TCH transact end due BSS probl 001012
TRX / TSL is blocked
Clear complete
Rf channel rel ack
Conversation phase
Clear request
Disc
Ua
Channel release
Rf channel release
Clear command
Deactive SACCH
TCH transact end due BTS fail 001047
TCH transact end due USER act 001048
TCH transact end due NETW act 001050
TCH transact end due Abis int fail 001084
001133
001134
FR TCH transactions fail
or HR TCH transactions fail
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
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Figure TRX or TSL is blocked with different causes during a call : Counters
updated with cause LAPD_failure: 001012 and 001046. Counters updated with
cause BTS_failure: 001012 and 001047. Counter 001048 is updated with cause
USER_actions. Counter 001050 is updated with cause NETW_actions. Counters
updated with cause ABIS_failure: 001012, 001045 and 001084. Counter 001108,
001109, 001110, 001111, 001112 or 001113 and counter 001133 or 001134 are
always updated with these causes.
Figure 18. SDCCH congestion, FACCH call setup is not activated.
BSC:
Unsucc imm ass SDCCH att
001155
SDCCH seiz att for MOC
001135 or
SDCCH seiz att for MTC
001136
SDCCH attempts
001000
Seiz att with busy SDCCH
001001
MS: MSC:BTS:
Immediate assignment reject
Channel required
Channel request
Paging part
Radio access part on CCCH
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Figure 20. Unsuccessful SDCCH activation, timer expires while waiting for
CHANNEL_ACTIVATION_ACK message.
MSC:BSC:BTS:MS:
SDCCH transact end dueBSS fail
Start timer T9103
Channel request
Channel required
Channel activation
Paging part
Rf channel release
Rf channel release ack
Immediate assignment reject
Radio access part on CCCH
Timer T9103 expires
SDCCH transact end duefail in Abis int
SDCCH transact end due fail in Abis intduring a call
001002
001033
001075
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Figure 21. Connection failure during SDCCH assignment.
BTS:
Failure
MSC:MS: BSC:
SDCCH transact ended due radio fail
001003
Channel request Channel required
Channel activation
Channel activation ack
Immediate assign command
Immediate assign
Connection failure
Channel release
Deactive SACCHDisc
Ua
Release indication
Rf channel release
Rf channel release ack
Radio access part on CCCH
Paging part
DDCH establishment part
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Figure 22. SDCCH assignment failure.
BTS: MSC:MS: BSC:
SDCCH transact end due fail in A -int
during a call001078
SDCCH transact end due fail in A -int001034
SDCCH transact end due BSS fail
001002
Failure
Assignment request
Channel release
Deactive SACCHDisc
Ua
Release indication
Rf channel release
Rf channel release ack
Assignment failure
Clear command
Clear complete
Basic call signalling, see figure 1
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Figure 23. Unsuccessful SDCCH activation, timer expires while waiting for
PHYSICAL_CONTEXT_CONFIRM message.
MSC:BSC:BTS:MS:
SDCCH transact end dueBSS fail
SDCCH transact end duefail in Abis int
SDCCH transact end due fail in Abis intduring a call
001002
001033
001075
Timer T9108 expires
Start timer T9108
Assignment request
Physical context request
Assignment failure
Basic call signalling, see figure 1
Clear command
Rf channel release
Rf channel release ack
Channel release
Deactive SACCHDisc
UaRelease indication
Clear complete
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Figure 24. TRX/TSL is blocked with different causes during an SDCCH channel
activation.
Figure TRX/TSL is blocked with different causes during an SDCCH channel
activation : Counters updated with cause LAPD_failure : 001002 and 001035.
Counters updated with cause BTS_failure : 001002 and 001036. Counter 001037
is updated with cause USER_actions . Counter 001039 is updated with cause
NETW_actions . Counters updated with cause ABIS_failure : 001002, 001033
and 001075.
MSC:BSC:BTS:MS:
SDCCH transact end due
BSS fail
SDCCH transact end duefail in Abis int
001002
001033
TRX / TSL is blocked
Channel requestChannel required
Channel activation
Paging part
Rf channel release
Rf channel release ack
Immediate assignment reject
SDCCH transaction end dueLAPD fail 001035
SDCCH transact ended dueBTS fail 001036
SDCCH transact end dueuser actions 001037
SDCCH transact end duenetw act fail 001039
SDCCH transact end due fail in Abis intduring a call 001075
Radio access part on CCCH
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Figure 25. Successful trunk reservation. Counters updated: 001040, 001041
and basic call counters, see Figure 2.
BSC:
Succ trunk reservations
001041
Trunk reservations
001040
MS: MSC:BTS:
Physical context request
Assignment request
Physical context confirm
Channel activation
Channel activation ack
Assignment command
Basic call signalling, see figure 1
Basic call signalling, see figure 1
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Figure 26. Unsuccessful trunk reservation.
MSC:BSC:BTS:MS:
TCH req for norm assign 001026
TCH requests 001010
Trunk reservations 001040
Assignment failure
Rf channel release
Rf channel release ack
Basic call signalling, see figure 1
Clear command
Channel release
Deactive sacchDisc
UaRelease indication
Clear complete
Physical context confirm
001056
001057
Ass req, que allowor
Ass req, que not allow
001102
001103
001104
001105
FR TCH requestsor
HR TCH requests
or FR pref TCH requestsor HR pref TCH requests
001137
001138
TCH seiz att for MOCor
TCH seiz att for MTC
Unsuccessful trunk reservation
Refus TCH req of non-prior subsc 001097
Refused trunk reservations 001042
001100
001101
FR TCH req for trunk reserv rejor HR TCH req for trunk reserv rej
001060
001061
Rej ass req, queueing allowedor Rej ass req, queueing not allowed
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
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Figure 27. Successful internal intra-cell handover. Counters 001090 and
001091 are updated only with underlay overlay handover.
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas result
Physical context requestPhysical context confirm
HO measurement, Old TCH channel
Channel activation
Channel activation ack
Assignment commandAssignment command
Sabm Establish indication
Ua
Rr HO performed
Rf channel releaseRf channel release ack
Assignment completeAssignment complete
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001064
001065
Att to req HO, que allowedor Att to req HO, que not allowed
001102 or 001103 or 001104 or 001105
FR TCH requestsHR TCH requestsFR pref TCH requestsHR pref TCH requests
TCH req for underlay/overlay HO 001090
Succ TCH req for HO 001008
TCH seiz for underlay/overlay HO 001091
001106 or 001107
FR TCH succ seizHR TCH succ seiz
Succ seiz of FR TCH in int HOwith ch rate changesor
Succ seiz of HR TCH in int HOwith ch rate changes
001116
001117
Old TCH channel release
Signalling on new TCH channel
Signalling on old TCH channel
New TCH channel reservation and activation
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Figure 28. Internal intra-cell HO, successful TCH queuing.
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas resultPhysical context request
Physical context confirm
Channel activation
Rf channel releaseRf channel release ack
001102 or 001103 or
001104 or 001105
FR TCH requestsHR TCH requests
FR pref TCH requestsHR pref TCH requests
TCH req for underlay/overlay HO 001090
001106 or 001107
FR TCH succ seizHR TCH succ seiz
New TCH channel reservation and activation
HO measurement, Old TCH channel
Att to req HO, que allowed 001064
No free TCH, request is set in queue
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
TCH channel is released, request is taken from queue
HO signalling, see figure 27
001137 or 001138
TCH seiz att for MOCTCH seiz att for MTC
HO att set in queue for TCH 001017
Queued urgent HO attempt 001142
001023
001022
Queue denominator 3
Ave queue time of ho attempt
001143
001145
Ave queue time of urgent ho attor Ave queue time of non urgent ho att
Queue denominator 4Queue denominator 4
001144 or 001146
Succ TCH req for HO 001008
TCH seiz for underlay/overlay HO 001091
Succ FR TCH int HO with ch rt chor Succ HR TCH int HO with ch rt ch
001116
001117
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Figure Internal intra-cell HO, successful TCH queuing : Counters 001090 and
001091 are updated only with underlay overlay HO. Counters 001142, 001143
and 001144 are updated only if the HO is started by cause urgent_handover .
001145 and 001146 are updated only if the HO is started by cause
non_urgent_handover .
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Figure 29. Unsuccessful internal intra-cell handover, timer expires while waiting
for CHANNEL_ACTIVATION_ACK message.
MSC:BSC:BTS:MS:
TCH transact end due BSS probl 001012
Start timer T9103
Timer T9103 expires
Meas report Meas result
Physical context request
Physical context confirm
Channel activation
Call going on the TCH channel
Rf channel release
Rf channel release ack
HO measurement, HO decision
New TCH channel reservation and activation
Normal HO counters updated, see figure 27
TCH transact end due Abis fail 001045
TCH transact end due Abis intfail on target channel
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
FR TCH transactions failor HR TCH transactions fail
001133
001134
Call continuous on the old TCH channel
001086
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Figure 30. Unsuccessful internal intra-cell handover, CONNECTION_FAILURE
message with cause remote_transcoder_failure comes to the target
channel.
MSC:BSC:BTS:MS:
Meas report Meas result
Physical context requestPhysical context confirm
Channel activation
Call going on the TCH channelHO measurement, HO decision
New TCH channel reservation and activation
TCH transact end due transcfail on target
FR TCH transactions failor
HR TCH transactions fail
001133
001134
001031
Channel activation ack
Call continuous on the old TCH channel
Signalling on FACCH TCH (old channel)
Assignment command
Connection failure
Assignment command
Rf channel release
Rf channel release ack
HO failure HO failure
Signalling on FACCH TCH (new channel), channel release
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001127
001128
001129
001130
001131
001132
TCH transc fail FR speech ver 1or TCH transc fail FR speech ver 2or TCH transc fail FR speech ver 3or TCH transc fail HR speech ver 1or TCH transc fail HR speech ver 2or TCH transc fail HR speech ver 3
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Figure 31. Unsuccessful internal intra-cell handover, timer expires on the
source channel, call cleared.
MSC:BSC:BTS:MS:
Meas report Meas resultPhysical context request
Physical context confirm
FR TCH transactions failHR TCH transactions fail
001133 or 001134
Start timer T3107
HO measurement, Old TCH channel
Channel activation
Channel activation ack
Assignment commandAssignment command
Sabm Establish indicationUa
Rf channel release
Rf channel release ack
Clear request
Clear command
Rf channel releaseRf channel release ack
Clear complete
New TCH channel reservation and activation
Normal HO counters updated, see figure 6
Signalling on old TCH channel
Signalling on new TCH channel
Signalling on old TCH channel
Timer T3107 expires
New channel release
001108 or 001109 or 001110 or
001111 or 001112 or 001113
FR TCH speech FR ver 1FR TCH speech FR ver 2FR TCH speech FR ver 3
HR TCH speech HR ver 1HR TCH speech HR ver 2HR TCH speech HR ver 3
001133 or 001134
FR TCH transactions failHR TCH transactions fail
Old TCH channel release
TCH transact end due fail on source 001014
001108 or 001109 or 001110 or 001111 or 001112 or
001113
FR TCH speech FR ver 1FR TCH speech FR ver 2FR TCH speech FR ver 3HR TCH speech HR ver 1HR TCH speech HR ver 2
HR TCH speech HR ver 3
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Figure 32. Unsuccessful underlay overlay internal intra-cell handover, queuing
not allowed.
BSC: MSC:BTS:MS:
Meas report Meas result
Physical context request
Physical context confirm
HO measurement, Old TCH channel
Call continuous on old channel
New TCH channel reservation and activation
No free TCH, queueing not allowed
TCH requests 001010
001137
001138
TCH seiz att for MOCor TCH seiz att for MTC
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
Att to req HO, que not allowed 001065
TCH req for underlay/overlay HO 001090
TCH req rej due to lack 001011
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
HO req fail, queueing not allowed 001069
TCH req for underlay/overlay HOrej due lack 001092
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Figure 33. Internal intra-cell handover, unsuccessful TCH queuing.
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas result
Physical context request
Physical context confirm
001102 or
001103 or 001104 or 001105
FR TCH requests
HR TCH requestsFR pref TCH requestsHR pref TCH requests
New TCH channel reservation and activation
HO measurement, Old TCH channel
No free TCH, request is set in queue
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
001137 or 001138
TCH seiz att for MOCTCH seiz att for MTC
HO att set in queue for TCH 001017
Queued urgent HO attempt 001142
Queue denominator 3 001023Ave queue time of ho attempt 001022
Att to req HO, queueing allowed 001064
Call continous on old TCH channel
No suitable TCH released in time
TCH req rej due to lack 001011
HO att in queue not served 001025
HO req rej, queueing allowed 001068
001144 or 001146
Queue denominator 4Queue denominator 5
Queued urgent HO att not served 001147
001143
001145
Ave queue time of urgent ho attor
Ave queue time of non urgent ho att
001118 or 001119
FR TCH req rej due to lackHR TCH req rej due to lack
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Figure Internal intra-cell handover, unsuccessful TCH queuing : Counters
001142, 001143, 001144 and 001147 are updated only if the handover is started
by cause urgent_handover . Counters 001145 and 001146 are updated only if the
handover is started by cause non_urgent_handover .
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Figure 35. Successful internal inter-cell handover.
MSC:BSC:BTS:MS:
Sabm Establish indication
Channel activation
Channel activation ack
HO commandHO command
HO access HO detection
Physical info
Ua
Rr HO performed
Rf channel release
Rf channel release ack
HO complete HO complete
TCH requests 001010
Meas report Meas result
HO measurement, Old TCH channel in the old BTS
Signalling on the old TCH channel in the old BTS
Signalling on the new TCH channel in the new BTS
Old TCH channel release in the old BTS
New TCH channel reservation and activation in the new BTS
001137 or 001138
TCH seiz att for MOCTCH seiz att for MTC
001064 or 001065
Att to req HO, que allowedAtt to req HO, que not allowed
TCH req for underlay/overlay HO 001090
001102 or
001103 or 001104 or 001105
FR TCH requestsHR TCH requestsFR pref TCH requestsHR pref TCH requests
Succ TCH req for HO 001008
TCH seiz for underlay/overlay HO 001091
001106 or 001107
FR TCH succ seizHR TCH succ seiz
Succ seiz of FR TCH in int HOwith ch rate changesSucc seiz of HR TCH in int HOwith ch rate changes
001116 or
001117
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Figure Successful internal inter-cell handover : Counters 001090 and 001091 are
updated only with underlay overlay handover.
Figure 36. Unsuccessful internal inter-cell handover.
MSC:BSC:BTS:MS:
Meas report Meas result
TCH activation fail 001028
HO measurement, Old TCH channel
Channel activation
Channel activation nack
New TCH channel reservation and activation in new BTS
Call continuous on the old channel
Rf channel releaseRf channel release ack
Normal HO counters updated, see figure 35
New channel release
TCH transact end due TCH actfail in target
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001133
001134
FR TCH transactions failor HR TCH transactions fail
001083
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Figure 37. Successful external handover, target.
MSC:BSC:BTS:MS:
TCH requests 001010
HO request
Channel activation
Channel activation ack
HO request ack
HO access HO detection HO detection
Physical info
Sabm Establish indication
Ua
HO complete
Rr
HO complete HO completed
001064
001065
Att to req HO, que allowedor Att to req HO, que not allowed
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
Succ TCH req for HO 001008
001106
001107
FR TCH succ seizor HR TCH succ seiz
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Figure 38. Successful external handover, source.
BTS: MSC:MS: BSC:
FR TCH speech FR ver 1
001108 or FR TCH speech FR ver 2
001109 or
FR TCH speech FR ver 3001110 or
HR TCH speech HR ver 1001111 or
HR TCH speech HR ver 2001112 or
HR TCH speech HR ver 3001113
HO command
Rf channel release
Rf channel release ack
HO requiredMeas report Meas result
Clear complete
HO commandHO command
Clear command
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Figure 39. Unsuccessful external handover, source BSC, timer expires while
waiting for CLEAR_COMMAND message.
MSC:BSC:BTS:MS:
Timer T8 expires
Start timer T8
TCH transact end due BSS probl 001012
Meas report Meas result HO required
HO command
HO measurement, HO decision
Call going on the TCH channel
Clear command
Rf channel release
Rf channel release ack
Clear request
HO commandHO command
Clear complete
Call cleared
TCH transact end due A int fail 001051
TCH transact end due A int failon source
001108
001109
001110
001111
001112
001113
FR TCH speech FR ver 1or FR TCH speech FR ver 2or FR TCH speech FR ver 3or HR TCH speech HR ver 1or HR TCH speech HR ver 2or HR TCH speech HR ver 3
001133
001134
FR TCH transactions failor HR TCH transactions fail
001088
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Figure 41. Successful traffic reason handover, source.
MSC:BSC:BTS:MS:
HO s due to traffic reasons 001052
Rf resource indication
Resource request
Resource indication
HO candidate enquiry
HO required
HO candidate response
HO commandHO commandHO command
Enquiries of traffic reason HO 001053
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Figure 42. Successful SDCCH internal intra-cell handover.
MSC:BSC:BTS:MS:
SDCCH attempts 001000
Meas report Meas result
Physical context request
Physical context confirm
HO measurement, Old SDCCH channel
Channel activation
Channel activation ack
Assignment command
Assignment command
Sabm Establish indication
Ua
Assignment completeRr HO performed
Rf channel release
Rf channel release ack
New SDCCH channel reservation and activation
001135
001136
SDCCH seiz att for MOCor SDCCH seiz att for MTC
Succ SDCCH seiz for HO 001006
Signalling on old SDCCH channel
Signalling on new SDCCH channel
Old SDCCH channel release
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Figure 43. Unsuccessful SDCCH internal intra-cell handover, timer expires
while waiting for CHANNEL_ACTIVATION_ACK message.
MSC:BSC:BTS:MS:
Timer T9103 expires
Start timer T9103
Meas report Meas result
Physical context request
Physical context confirm
Channel activation
HO measurement, old SDCCH channel
Rf channel release
Rf channel release ack
New SDCCH channel reservation and activation
SDCCH transact end due BSSprobl
Signalling continuous on old SDCCH channel
SDCCH transact end due Abisint fail
SDCCH transact end due Abis int failon target
001002
001033
001077
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Figure 44. Unsuccessful SDCCH internal intra-cell handover, unsuccessful
channel activation.
BSC:
SDCCH transact end duech act fail on target
001074
SDCCH transact end duech act fail
001027
MS: MSC:BTS:
Meas report Meas result
Physical context request
Physical context confirm
Channel activation
Rf channel release
Rf channel release ack
Channel activation nack
HO measurement, old SDCCH channel
New SDCCH channel reservation and activation
Signalling continuous on old SDCCH channel
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Figure 45. Unsuccessful SDCCH internal intra-cell handover,
CONNECTION_FAILURE message comes to the target channel
during handover.
MSC:BSC:BTS:MS:
Meas report Meas result
Physical context request
Physical context confirm
HO measurement, Old SDCCH channel
Channel activation
Channel activation ack
Assignment command
Assignment command
Sabm Establish indication
UaConnection failure
Signalling continuous on old channel
Rf channel release
Rf channel release ack
New SDCCH channel reservation and activation
Signalling on old SDCCH channel
Signalling on new SDCCH channel
SDCCH transact end dueradio fail on target 001005
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Figure 46. Successful SDCCH internal inter-cell handover.
MSC:BSC:BTS:MS:
SDCCH attempts 001000
Succ SDCCH seiz for HO 001006
Meas report Meas result
Sabm Establish indication
HO measurement, Old SDCCH channel in old BTS
Channel activation
Channel activation ack
New SDCCH channel reserv. and activ. in new BTS
Signalling on the old SDCCH channel in the old BTS
HO commandHO command
Signalling on new SDCCH channel in new BTS
HO access HO detection
Physical info
Ua
Rr HO performed
Old SDCCH channel release in the old BTS
Rf channel release
Rf channel release ack
HO complete HO complete
001135
001136
SDCCH seiz att for MOCor SDCCH seiz att for MTC
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Figure 47. Unsuccessful SDCCH internal inter-cell handover, BTS sends
CONNECTION_FAILURE message.
MSC:BSC:BTS:MS:
Meas report Meas result
Rf channel release
Rf channel release ack
HO measurement, Old SDCCH channel
Channel activation
Connection failure
New SDCCH channel reservation and activation
Signalling on old SDCCH channel
Signalling on new SDCCH channel
Rf channel release
Rf channel release ack
Clear request
Clear command
Clear complete
SDCCH transact end due radiofail on source 001004
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Figure 48. Successful SDCCH external handover target.
Figure 49. Successful SDCCH external handover source. No counters
updating.
MSC:BSC:BTS:MS:
SDCCH attempts 001000
HO request
Channel activation
Channel activation ack
HO request ack
HO access HO detection HO detection
Physical info
Sabm Establish indication
Ua
HO complete
Rr
HO complete HO completed
Succ SDCCH seiz for HO 001006
BSC:MS: MSC:BTS:
HO command
Rf channel release
Rf channel release ack
HO required
Meas report Meas result
Clear complete
HO commandHO command
Clear command
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Figure 50. Unsuccessful SDCCH external handover, timer expires while waiting
for CLEAR_COMMAND message.
MSC:BSC:BTS:MS:
SDCCH transact end due A int fail 001034
SDCCH transact end due BSS fail 001002
Timer T8 expires
Start timer T8
HO command
Rf channel release
Rf channel release ack
HO requiredMeas report Meas result
Clear complete
HO commandHO command
Clear command
Clear request
Signalling on SDCCH source channel
Rf channel release ackRf channel release
Clear command
Clear complete
SDCCH transact end due A int failon source
Signalling on SDCCH target channel
SDCCH transact end due BSS fail 001002
SDCCH transact end due A int fail 001034
SDCCH transact end due A int failon target
001079
001080
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Figure 51. Successful forced release.
MSC:BSC:BTS:MS:
TCH requests 001010
Call going on TCH channel
Clear request
Clear command
Channel release
Deactive SACCHDisc
Ua Release indication
Rf channel release
Rf channel release ack
Clear complete
Channel activation
Physical context confirm
Queueing indication
New call coming with priority subscriber
Basic call signalling, see figure 1
TCH req for norm assign 001026
Ass req that can cause forced rel 001054
001102 or 001103 or 001104 or 001105
FR TCH requestsHR TCH requestsFR pref TCH requestsHR pref TCH requests
TCH seiz att for MOCTCH seiz att for MTC
001137 or 001138
001120 or 001121
FR TCH req rej due HR trafficHR TCH req rej due FR traffic
No free TCH channel, call with lower priority is released
Released TCH channel is allocated for the priority call
Forced release 001070
TCH succ req in norm assign 001009
001106 or 001107
FR TCH succ seizHR TCH succ seiz
Signalling continuous like basic call, see figure 1
001114
001115
FR TCH succ seiz for norm assignor HR TCH succ seiz for norm assign
001108 or 001109 or 001110 or 001111 or 001112 or 001113
FR TCH speech FR ver 1FR TCH speech FR ver 2FR TCH speech FR ver 3HR TCH speech HR ver 1HR TCH speech HR ver 2HR TCH speech HR ver 3
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Figure 52. Unsuccessful forced release.
MSC:BSC:BTS:MS:
TCH requests 001010
Clear command
Channel release
Deactive SACCHDisc
UaRelease indication
Rf channel release
Rf channel release ack
Clear complete
Physical context confirm
Queueing indication
New call coming with priority subscriber
Basic call signalling, see figure 1
TCH req for norm assign 001026
Ass req that can cause forced rel 001054
001102 or 001103 or
001104 or 001105
FR TCH requestsHR TCH requests
FR pref TCH requestsHR pref TCH requests
T CH s eiz at t f or M OC
TCH seiz att for MTC001137 or
001138
001120 or 001121
FR TCH req rej due HR trafficHR TCH req rej due FR traffic
No free TCH channel
Assignment failure
No suitable TCH for release, forced release timer expires
TCH req with prior subscriber 001095
FR TCH req rej due to lackHR TCH req rej due to lack
001118 or 001119
Forced rel req rej 001058
TCH req rej due to lack 001011
TCH req rej due to cong 001141
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Figure 53. Unsuccessful forced release with external handover.
MSC:BSC:BTS:MS:
TCH requests 001010
Meas report Meas result HO required
HO request
Queuing indication
Priority call going on the TCH channel
Clear command
Rf channel release
Rf channel release ack
HO failure
Clear complete
HO measurement, HO decision
New TCH channel reservation and activation in new BSC
Att to req HO with forced rel 001062
TCH req with prior subscriber 001095
001102
001103
001104
001105
FR TCH requestsor HR TCH requestsor FR pref TCH requestsor HR pref TCH requests
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
No suitable TCH for forced release, forced release timer exp ires
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
TCH req rej due to lack 001011
HO req rej with forced release 001066
Call continuous on the old channel
001118
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Figure 54. Successful forced handover.
MSC:BSC:BTS:MS:
TCH req for norm assign 001026
TCH requests 001010
Ass req that can cause forced HO 001055
New call coming with priority subscriber
Call going on the TCH channel
Channel activation
Physical context confirm
No free TCH channel, call with lower priority is forced HO
Queueing indication
001102
001103
001104
001105
FR TCH requestsor
HR TCH requestsor
FR pref TCH requestsor
HR pref TCH requests
001137
001138
TCH seiz att for MOCor
TCH seiz att for MTC
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
Normal internal inter cell HO, see figure 35
Released TCH channel is allocated for the priority call
TCH succ req in norm assign 001009
Forced HO 001071
001106
001107
FR TCH succ seizor
HR TCH succ seiz
001114
001115
FR TCH succ seiz for norm assignor
HR TCH succ seiz for norm assign
Signalling continuous like basic call, see figure 1
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Figure 55. Unsuccessful forced handover.
MSC:BSC:BTS:MS:
TCH req rej due to lack 001011
TCH requests 001010
New call coming with
Calls going on the TCH channel
Clear complete
Forced handover timer expires
Physical context confirm
No free TCH channel,
Assignment failure
Clear command
Channel release
Deactive SACCHDisc
UaRelease indication
Rf channel release
Rf channel release ack
Queueing indication
TCH req for norm assign 001026
Ass req that can cause forced HO 001055
TCH req with prior subscriber 001095
001102
001103
001104
001105
FR TCH requestsor
HR TCH requestsor
FR pref TCH requestsor
HR pref TCH requests
001137
001138
TCH seiz att for MOCor
TCH seiz att for MTC
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
TCH req rej due to cong 001141
Forced HO req rejected 001059
no suitable calls for forced HO
priority subscriber
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Figure 56. Unsuccessful forced handover with external handover.
MSC:BSC:BTS:MS:
TCH req rej due to lack 001011
TCH req with prior subscriber 001095
TCH requests 001010
Att to req HO with forced HO 001063
HO req rej with forced HO 001067
Meas report Meas result HO required
HO request
HO measurement, HO decision
Queuing indication
New TCH channel reservation
No suitable TCH for forced handover,
Priority call going on the TCH channel
Call continuous on the old channel
Clear command
Rf channel release
Rf channel release ack
HO failure
Clear complete
001102
001103
001104
001105
FR TCH requestsor
HR TCH requestsor FR pref TCH requestsor
HR pref TCH requests
001120
001121
FR TCH req rej due HR trafficor HR TCH req rej due FR traffic
001118
001119
FR TCH req rej due to lackor HR TCH req rej due to lack
forced handover timer expires
and activation in new BSC
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Figure 57. Reconfiguration from TCH to SDCCH.
MSC:BSC:BTS:MS:
SDCCH attempt 001000
Channel requestChannel required
Channel activation
Paging part
Radio access part on CCCH
001135
001136
SDCCH seiz att for MOCor SDCCH seiz att for MTC
Reconfiguration from idle TCH to active SDCCH
Dynamic SDCCH reconf attempt 001154
SDCCH succ seiz for imm assign 001007
Basic call signalling continuos, see figure 1
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Figure 58. Normal call.
MSC:BSC:BTS:MS:
Succ TCH seiz for ass complete 001148
Basic call signalling, see figure 1
Basic call signalling, see figure 1
TCH seized, FACCH signalling part
Assignment complete
Assignment complete
Sabm
Ua
Establish indication
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Figure 59. Mobile originated HSCSD call setup.
MSC:BSC:BTS:MS:
HSCSD req for call setup 001160
Classmark change Classmark update
Setup Setup
Normal signalling
Call proceedingCall proceeding
Channel activation
Channel activation ack
Assignment request
Physical context requestPhysical context confirm
Channel activation
Channel activation ack
Assignment command
Sabm Establish indicationUa
Assignment complete Assignment completeRf channel release
Rf channel release ackAlert AlertConnect Connect
Connect ackConnect ack
Release completeClear command
Clear completeChannel release
Deactivate SACCHDisc
UaRelease indication
Rf channel releaseRf channel release ack
Disconnect DisconnectReleaseRelease
Release complete
Normal signalling
HSCSD TCH req with 14,4HSCSD transp TCH req
001156 or 001158
001157 or 001159
HSCSD succ TCH req with 14,4HSCSD succ transp TCH seiz
HSCSD succ TCH 001162
Counters for TCH request and
TCH seized, FACCH signalling part
Conversation phase
Release by MS
succesful TCH seizures are also updated, see figure 2
seiz for call setup
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Figure 60. Successful internal inter-cell handover for HSCSD, target cell
allocations and activations for three channels.
MSC:BSC:BTS:MS:
HSCSD TCH request for HO 001161
HSCSD transp TCH request 001158
HSCSD TCH request with 14,4 001156
Meas report Meas result
Sabm Establish indication
HO measurement, Old TCH channel in the old BTS
Channel activation
Channel activation ack
Signalling on the old TCH channel in the old BTS
HO commandHO command
HO access HO detection
Physical info
Ua
Rr HO performed
Rf channel release
Rf channel release ack
HO complete HO complete
Channel activation
Channel activation ack
Channel activation
Channel activation ack
New TCH channel reservation and activation in the new BTS
Normal handover counters are updated, see figure 35
HSCSD succ TCH seiz with 14,4 001157
HSCSD succ transp TCH seiz 001159
HSCSD succ TCH seiz for HO 001163
Signalling on the new TCH channel in the new BTS
Old TCH channel release in the old BTS
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Figure 62. Internal intra-cell direct access from a regular DCCH to the super-
reuse TRX. Optional software direct access to super-reuse TRX in
IUO activated.
MSC:BSC:BTS:MS:
Succ TCH seiz for dir acc 1165
Assignment request
Physical context request
Sabm Establish indication
Basic call signalling, see figure 1
Channel activation
Channel activation ack
Physical context confirm
Assignment command
Assignment command
Ua
Rr
Assignment complete
Rf channel release
Rf channel release ack
Assignment complete Assignment complete
Alert Alert
Connect ackConnect ack
Connect Connect
Physical context information
Direct access to super-reuse TRX
TCH reservation and activation
Signalling on SDCCH
Signalling on FACCH - TCH
SDCCH release
Connection
Conversation phase
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Figure 63. Unsuccessful internal intra-cell direct access from regular DCCH to
the super-reuse TRX due to lack of resources. Optional software
direct access to super-reuse TRX in IUO activated.
MSC:BSC:BTS:MS:
TCH req for dir acc rej due lack 1166
Assignment request
Physical context request
Basic call signalling, see figure 1
Physical context confirm
Physical context information
Unsuccessful direct access attempt to super-reuse TRX
Signalling continuous on old channel
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Figure 65. Average counter updating.
Figure 66. Basic call. Optional software dynamic hotspot is activated.
MSC:BSC:BTS:MS:
Timer is started
After 20 seconds
Timer expires
Timer is started again
After 20 seconds
Timer expires
Average queue length for channelseizure request
Average queue length for channelseizure request
1018
1018
MSC:BSC:BTS:MS:
Basic call signalling, see figure 1
Physical context confirm
Channel activation
1150
1151
1152
1153
Succ TCH seiz when good qual in adjor TCH req rej due to bad qual in adjor Succ TCH seiz when qual betw goodand bad in adjor TCH req rej when qual betw goodand bad in adj
Basic call signalling continues
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Figure 67. Successful handover due to DADL/B.
Figure 68. Unsuccessful DADL/B handover due to lack of resources.
BTS: MSC:MS: BSC:
Succ TCH seiz for DADL/B HO001170
DADL/B start due to exceeded load001172
Channel activationChannel activation ack
Assignment request
Physical context request
Physical context confirm
Signalling
Signalling continues
BTS: MSC:MS: BSC:
TCH request in DADL/B HO rejected001171
DADL/B start due to exceeded load001172
Assignment request
Physical context request
Physical context confirm
Signalling
DR and queuing possible
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Figure 69. Successful BSC controlled TRHO.
Figure 70. Unsuccessful BSC controlled TRHO.
Related topics
1 Traffic Measurement
BTS: MSC:MS: BSC:
Succ TCH seiz for BSC contr TRHO
001168
TCH request for BSC contr TRHO
001167
Channel activation
Channel activation ack
Normal HO signalling
Signalling on the old TCH channel in the old BTS
New TCH channel reservation and activation in the new BTS
HO decision
BTS: MSC:MS: BSC:
Rej TCH seiz for BSC contr TRHO due to lack
001169
TCH request for BSC contr TRHO
001167
HO decision
New TCH channel reservation
HO ends and signalling continuous on
and activation in the new BTS
the old TCH channel in the old BTS
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Counters of Traffic Measurement
1 Traffic Measurement