Feedback - Call Drop Due to Samsung Galaxy S2
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Transcript of Feedback - Call Drop Due to Samsung Galaxy S2
8/12/2019 Feedback - Call Drop Due to Samsung Galaxy S2
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11
Customer’s Complaints: Difficult to setup callat True tower
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Prepared by: Huawei RNP-O Team
8/12/2019 Feedback - Call Drop Due to Samsung Galaxy S2
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2
Problem Description
Problem
Difficult to setup Voice and Data CallHandset model : Samsung Galaxy 2
SIM : “00”
Problem Location
True Tower , Thai Summit Building
Testing Date: 10-11 August 2011Testing Location :
Thai Summit Building (Serving Cell: BKB1043V_8NB01_S01, BKB1043V_8NB01_S03)
Measurement Tools
Nemo Outdoor
RNC LMT Online Trace (RAN12.0)
Terminal Models
Nemo Nokia6720
iPhone 4
Samsung Galaxy 2 (R7)
Samsung Galaxy Cooper (R6)
SIERRA WIRELESS USB308 (R7)
8/12/2019 Feedback - Call Drop Due to Samsung Galaxy S2
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Problem Finding from UE TraceSIM”00” IMSI_520002000068098(MOC) – NEMO(f2, BKB1043V_8NB01_S01,03)
3
Nemo tool peg this call as cal l drop due to Network initiated to disconnect the call. Nemo (A-party) cannot make a call due to
problem at B-party.
8/12/2019 Feedback - Call Drop Due to Samsung Galaxy S2
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Problem Finding from UE TraceSIM”00” IMSI_520002000066958 (MTC)Samsung Galaxy 2 – Call Setup Failure (1) (f2,BKB1043V_8NB01_S01,03)
4
Call setup failure during RAB setup procedure.
After RNC sent “RRC_RB_Setup” to UE , RNC start timer (5sec) to wait for response from UE , “RRC_RB_CMP”
After timer expired , RNC request CN to release Iu with abnormal cause : “Radio Connection With UE lost”
Good DL radio Condition : EcIo -6 dB and RSCP -70dBm and UL radio Condition: RTWP ~ -104 to -105 dBm ,UE Tx Power = -16
dBm
8/12/2019 Feedback - Call Drop Due to Samsung Galaxy S2
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Problem Finding from UE TraceSIM”00” IMSI_520002000066958 (MOC)
Samsung Galaxy 2 – Call Setup Failure (2) ( f1,BKB1043U_8NB01_S01)
5
Call setup failure during RAB setup procedure.
After RNC sent “RRC_RB_Setup” to UE , RNC start timer (5sec) to wait for response from UE , “RRC_RB_CMP”
After timer expired , RNC request CN to release Iu with abnormal cause : “Failure in the Radio Interface Procedure”
Good DL radio Condition : EcIo -10.5 dB and RSCP -72dBm and UL radio Condition: RTWP ~ -100 to -102 dBm ,UE Tx Power = -12 dBm
8/12/2019 Feedback - Call Drop Due to Samsung Galaxy S2
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Problem Finding from UE TraceSIM”00” IMSI_520002000066958 (MOC)Samsung Galaxy 2 – Multiple Call Setup Failures due to re-dialling (3)
6
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Conclusions
7
Conclusions
From Test Result with Sim “00” + different types of handsets, call setup failures only observed
when use Samsung Galaxy 2 handset which is Release 7 model, this issue found both f1 and f2
cell layer.
Nemo Nokia6720 - No problem foun d
iPhone 4 - No problem fo und
Samsung Galaxy Cooper (R6) - No problem foun d
SIERRA WIRELESS USB308 (R7) - No problem fou nd
Samsung Galaxy 2 (R7) - call setup problem both Voice and data (2 terminals
shows similar issue)
This issue impact on KPI :
(1) RAB Setup Success Rate (CS & PS)(2) Drop call only observe when use NEMO test tool as MOC + Samsung Galaxy 2 as MTC.
This is due to Nemo drop call definition , when UE originate call, the call must be terminated by
UE otherwise this call will be considered as abnormal release (drop call).