InterSystem Neighboring Strategy_Initial Report.ppt
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Transcript of InterSystem Neighboring Strategy_Initial Report.ppt
Customer Confidential
1 © Nokia Siemens Networks
INTERSYSTEM NEIGHBORING INTERSYSTEM NEIGHBORING STRATEGY STRATEGY
Customer Confidential2 © Nokia Siemens Networks
BACKGROUND
METHODOLOGY
The objective of the trial implementation► Minimize and improve neighbour list for ISHO and cell reselection
► Verify and fine tune ISHO and cell reselection parameters if applicable
► Investigate the need for different parameter settings in general situations
► Focusing only in Real Time (RT) Services
► Focusing only in Macro WCDMA (MW) in cluster accepted West Java area
Customer Confidential3 © Nokia Siemens Networks
SUMMARY• PLAN1:
• There is no adverse impact on 2G sites after trial of adjacency deletion from MW to MD and MW to OD.
• There is significant reduction on HO attempts from MW to MD collocated sites and OD. Although adjacent relation from MW to MD collocated inside the cluster has been deleted, a few number of HO attempts from MW to MD still exist due to attempt from active set outside the cluster.
• From 3G point of view, ISHO success rate remain stable.
• By reducing number of neighbor for 3G sites, there are more spaces available for the next adjacency creation for anticipating the upcoming network rollout.
• PLAN2:• For NonBorder Cluster, share of ISHO due to Ec/No was slightly increased
after HHoEcNoThreshold changing from -12dB to -10dB. Faster ISHO was triggered by Ec/No. ISHO success rate was slightly increased.
• For Border Cluster, share of ISHO due to RSCP was significantly increased since HHoRSCPThreshold changing from -102dBm to -96dBm. Faster ISHO was triggered by RSCP. ISHO success rate remain stable.
Customer Confidential4 © Nokia Siemens Networks
IMPLEMENTATION PLAN for PLAN1• Intersystem Neighboring strategy
• Review and delete neighbor relation from 3G to DCS in sites with having collocated GSM/DCS/3G but keep the relation from DCS to 3G (asymmetric relation). If DCS having GSM as collocated sites then relations 3G into DCS site can be deleted as 1 way neighbour.
• Delete all neighbor relations from 3G to all 2G Micro Outdoor to minimize and optimize number of adjacency in 3G layer with assumption that always there are Macro 2G coverage as umbrella of 2G Micro Outdoor coverage.
• Area Trial:
• Macrocell Djuanda Cluster
• Microcell Outdoor Asia Afrika Cluster
Customer Confidential5 © Nokia Siemens Networks
PLAN 1: LAYERING CONCEPTS 3G to 2G MACRO CELLS
Macro 3G
Macro GSM
Macro GSM
Macro 3G
Macro 3G
Macro GSM
Macro DCS
Macro DCS
Macro DCS
Background:
◙ Current 2G layering concept may leads to excessive number of adjacency in 3G . Also impact to inaccurate decision of ISHO decision during triggering of target cells
◙ GSM experienced with stronger signal than DCS
Layering Concept for 3G into 2G Macro Outdoor:
◙ Review and delete neighbor relation from 3G to DCS in sites with having collocated GSM/DCS/3G but keep the relation from DCS to 3G (asymmetric relation)
◙ If DCS having GSM as collocated sites then relations 3G into DCS site can be deleted as 1 way neighbour
DELETE
KEEP
Customer Confidential6 © Nokia Siemens Networks
Micro Outdoor
GSM
PLAN 1: LAYERING CONCEPTS 3G to 2G MICRO OUTDOOR
Macro 3G
Micro Outdoor
GSM
Macro 3G
Macro 3G
Micro Outdoor
DCS
Micro Outdoor
DCS
Layering Concept for 3G into 2G Micro Outdoor cells:
◙ Delete all neighbor relations from 3G to all 2G Micro Outdoor to minimize and optimize number of adjacency in 3G layer
◙ Always there are Macro 2G coverage as umbrella of 2G Micro Outdoor coverage
DELETE
KEEP
Customer Confidential7 © Nokia Siemens Networks
Number of ADJG Comparison
With this new layering strategy, there are more spaces available after adjacency deletion. This is valuable for the next adjacency creation inline with the growing network rollout.
Customer Confidential8 © Nokia Siemens Networks
Share of HO Attempts from MW to 2G Cells
Share of HO attempts from MW to MD was significantly reduced after neighbor relation deletion from MW to MD
Customer Confidential9 © Nokia Siemens Networks
Breakdown of HO Attempts from MW to 2G Cells
In the Cluster Macro DCS, there is one DCS standalone BTS (NARIPANMD) and another 5 DCS collocated sites. HO attempts from MW to DCS standalone site more likely the same before and after trial while HO attempts from MW to MD collocated site was significantly
reduced.
Customer Confidential10 © Nokia Siemens Networks
Share of HO Attempts from MW to 2G Cells
There was no more HO attempts from MW to OD after neighbor relation deletion from MW to OD
Customer Confidential11 © Nokia Siemens Networks
Outgoing HOSR for MG CELL
Outgoing HOSR for MG Cells in Cluster Plan1 Macro more likely the same before and after trial implementation
Customer Confidential12 © Nokia Siemens Networks
ISHO Success Rate
87.0
90.0
93.0
96.0
99.0
2007/1
1/1
5
2007/1
1/1
6
2007/1
1/1
7
2007/1
1/1
8
2007/1
1/1
9
2007/1
1/2
0
2007/1
1/2
1
2007/1
1/2
2
2007/1
1/2
3
2007/1
1/2
4
2007/1
1/2
5
2007/1
1/2
6
2007/1
1/2
7
Trial Macro DCS Trial Micro Outdoor DCS
Sum of ISHO_SR
Date
Area trial
ISHO Success Rate for 3G Cells in the cluster of trial remain stable.
Customer Confidential13 © Nokia Siemens Networks
KPI for 2G Cells in Cluster Plan1
Traffic, TCH blocking rate and TCH drop call rate for all cells inside the cluster of trial still remain stable. High blocking on 23 Nov was contributed by site GDGBUMIPUTRAID1,
HTLPERDANAMG1 and HTLPERDANAMG3.
Traffic Spike
Customer Confidential14 © Nokia Siemens Networks
KPI for MG Cells in Cluster Plan1
Traffic, TCH blocking rate and TCH drop call rate for all cells inside the cluster of trial still remain stable. High blocking on 23 Nov was contributed by site HTLPERDANAMG1 and
HTLPERDANAMG3.
Traffic Spike
Customer Confidential15 © Nokia Siemens Networks
PLAN 2 : ISHO triggered using Ec/No and RSCP for Dedicated Mode 3G-2G• ISHO triggered using EcNo and RSCP for Dedicated Mode 3G-2G
a. HO Decision of RSCP Threshold (HHoRSCPThreshold) and cancel (HHoRSCPCancel) parameter tuning
b. Ho Decision of Ec/No Threshold (HHoEcNoThreshold) and cancel (HHoEcNoCancel) parameter tuning
c. Area Trial: Border Area Ledeng & Parakan Saat ClusterNon Border Area Tegalega Cluster
Customer Confidential16 © Nokia Siemens Networks
PLAN-2. ISHO TRIGGERING DEDICATED MODE 3G-2G
Customer Confidential17 © Nokia Siemens Networks
ISHO Distribution by Causes
0%
20%
40%
60%
80%
100%
20
07
/11
/01
20
07
/11
/02
20
07
/11
/03
20
07
/11
/04
20
07
/11
/05
20
07
/11
/06
20
07
/11
/07
20
07
/11
/08
20
07
/11
/12
20
07
/11
/13
20
07
/11
/14
20
07
/11
/15
20
07
/11
/16
20
07
/11
/17
20
07
/11
/18
20
07
/11
/19
20
07
/11
/20
20
07
/11
/21
20
07
/11
/22
20
07
/11
/23
20
07
/11
/24
20
07
/11
/25
20
07
/11
/26
20
07
/11
/27
20
07
/11
/28
Sum of IS_HHO_W_CMOD_UL_DCH_Q_RT Sum of IS_HHO_W_CMOD_UE_TX_PWR_RT
Sum of IS_HHO_W_CMOD_DL_DPCH_RT Sum of IS_HHO_W_CMOD_CPICH_RSCP_RT
Sum of IS_HHO_W_CMOD_CPICH_ECNO_RT Sum of IS_HHO_WO_CMOD_UL_DCH_Q_RT
Area NonBorder
DATE
Data
For NonBorder Cluster, share of ISHO due to Ec/No was slightly increased after HHoEcNoThreshold changing from -12dB to -10dB. Faster ISHO was triggered
by Ec/No.
Customer Confidential18 © Nokia Siemens Networks
ISHO Distribution by Causes
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
200
7/1
1/0
1
200
7/1
1/0
2
200
7/1
1/0
3
200
7/1
1/0
4
200
7/1
1/0
5
200
7/1
1/0
6
200
7/1
1/0
7
200
7/1
1/0
8
200
7/1
1/1
2
200
7/1
1/1
3
200
7/1
1/1
4
200
7/1
1/1
5
200
7/1
1/1
6
200
7/1
1/1
7
200
7/1
1/1
8
200
7/1
1/1
9
200
7/1
1/2
0
200
7/1
1/2
1
200
7/1
1/2
2
200
7/1
1/2
3
200
7/1
1/2
4
200
7/1
1/2
5
200
7/1
1/2
6
200
7/1
1/2
7
200
7/1
1/2
8
Sum of IS_HHO_W_CMOD_UL_DCH_Q_RT Sum of IS_HHO_W_CMOD_UE_TX_PWR_RT
Sum of IS_HHO_W_CMOD_DL_DPCH_RT Sum of IS_HHO_W_CMOD_CPICH_RSCP_RT
Sum of IS_HHO_W_CMOD_CPICH_ECNO_RT Sum of IS_HHO_WO_CMOD_UL_DCH_Q_RT
Area Border
DATE
Data
For Border Cluster, share of ISHO due to RSCP was significantly increased since HHoRSCPThreshold changing from -102dBm to -96dBm. Faster ISHO was
triggered by RSCP.
Customer Confidential19 © Nokia Siemens Networks
ISHO Success Rate
94
.73
%
95
.01
%
95
.40
%
95
.58
%
95
.88
%
94
.90
%
94
.50
%
95
.30
%
95
.63
%
96
.71
%
96
.43
%
96
.29
%
95
.36
%
95
.10
%
95
.04
%
95
.70
%
96
.09
%
96
.56
%
96
.34
%
96
.57
%
96
.32
%
96
.36
%
96
.69
%
93
.39
%
80
.92
%
80.0%
85.0%
90.0%
95.0%
100.0%2
00
7/1
1/0
1
20
07
/11
/02
20
07
/11
/03
20
07
/11
/04
20
07
/11
/05
20
07
/11
/06
20
07
/11
/07
20
07
/11
/08
20
07
/11
/12
20
07
/11
/13
20
07
/11
/14
20
07
/11
/15
20
07
/11
/16
20
07
/11
/17
20
07
/11
/18
20
07
/11
/19
20
07
/11
/20
20
07
/11
/21
20
07
/11
/22
20
07
/11
/23
20
07
/11
/24
20
07
/11
/25
20
07
/11
/26
20
07
/11
/27
20
07
/11
/28
ISH
O
0
2000
4000
6000
8000
10000
12000
14000
Nb
r o
f S
uc
ce
ss
RT
Sum of Success RT Average of ISHO RT
Area NonBorder
DATE
Data
ISHO success rate for NonBorder Cluster remain stable except for the last 2 days due to site problem on KOPOLKRSELMW while the number of ISHO success RT was
almost doubled. This problem still under investigation from MS team.
Customer Confidential20 © Nokia Siemens Networks
ISHO Success Rate
91.3
2%
93.3
6%
93.1
5%
93.3
3%
93.4
1%
92.9
0%
92.0
0%
91.9
3%
91.9
2%
93.9
2%
94.4
5%
95.0
9%
92.8
6%
92.4
2%
93.6
0%
93.6
3%
94.9
8%
92.5
8%
94.3
1%
93.8
5%
93.0
2%
92.1
9%
93.0
1%
93.9
3%
91.9
8%
80.0%
85.0%
90.0%
95.0%
100.0%2007/1
1/0
1
2007/1
1/0
2
2007/1
1/0
3
2007/1
1/0
4
2007/1
1/0
5
2007/1
1/0
6
2007/1
1/0
7
2007/1
1/0
8
2007/1
1/1
2
2007/1
1/1
3
2007/1
1/1
4
2007/1
1/1
5
2007/1
1/1
6
2007/1
1/1
7
2007/1
1/1
8
2007/1
1/1
9
2007/1
1/2
0
2007/1
1/2
1
2007/1
1/2
2
2007/1
1/2
3
2007/1
1/2
4
2007/1
1/2
5
2007/1
1/2
6
2007/1
1/2
7
2007/1
1/2
8
ISH
O
0
1000
2000
3000
4000
5000
6000
Nb
r o
f S
uccess R
T
Sum of Success RT Average of ISHO RT
Area Border
DATE
Data
ISHO success rate for Border Cluster remain stable while the number of ISHO success RT was almost doubled
Customer Confidential21 © Nokia Siemens Networks
DT Result
Customer Confidential22 © Nokia Siemens Networks
Plan 1 : Drive Test Statistic
No ISHO experienced in Micro Outdoor Cluster
*ISHO to GSM1800, UARFCN692_CALADIMD3. CALADIMD is located outside the cluster of testing
Customer Confidential23 © Nokia Siemens Networks
Plan 2 : Ledeng Border Area
• UE was served by SC159_LEDENGMW1 with Ec/No -10, RSCP -105. UE send MR-1F due to low RSCP.
• In the next 6s, ISHO was executed to ARFCN690_GSM1800
• UE was served by SC159_LEDENGMW1 with Ec/No -9, RSCP -101, UE send MR-1F due to RSCP.
• In the next 6s, ISHO was executed to ARFCN710_GSM1800
FASTER ISHO triggering by RSCP
Customer Confidential24 © Nokia Siemens Networks
Thank You