SW1_Training_LogAnalysis_GAP.ppt

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1、Log Analysis Series-GAP,CONFIDENTIAL,SW1/L1C,T3G Technology Company,2,Revision History,T3G Technology Company,3,Approval,Content,Basic Flow IntroductionCheck Points IntroductionTypical Issues AnalysisOthers,CONFIDENTIAL,4,Part1,Basic Flow Introduction,CONFIDENTIAL,GAP Overview,GAP-Get Available PLMN

2、Initiation:NAS requests RR to report all PLMNs currently available.user request or;A timer expiry in NASThe periodic power campaign timer expires in Limited service modeNAS asks RR to camp on a cell belonging to HPLMN,CONFIDENTIAL,6,GAP Overview,GAP Type(From Implementation)GAP when LCR CampedLCR GA

3、P when LCR Camped;GSM GAP when LCR Camped;GAP when GSM CampedLCR GAP when GSM Camped;GSM GAP when GSM Camped;,CONFIDENTIAL,7,GAP Flow-GAP when LCR Camped,CONFIDENTIAL,8,GAP Flow-GAP when GSM Camped,CONFIDENTIAL,9,GAP Flow-LCR GAP when LCR Camped,CPHY_DWPCH_DETECT_REQ(first time,returnAll=FALSE)CPHY_

4、DWPCH_DETECT_REQ(second time)From this,the procedure is similar as ICS for L1CCPHY_CELL_SYNC_REQCPHY_CELL_SYNC_INDAt most 3 cells and with 0 xFF to indicate the endCPHY_SIB_CONFIG_REQCPHY_SIB_SCHEDULE_REQGeneral said,1 means MIB,2 means SB1PHY_SIB_INDNeed Decode MIB,SIB1/3 to get the suitable inform

5、ation of the cell in the PLMN,CONFIDENTIAL,10,GAP Flow-GSM GAP when LCR Camped,First send CPHY_POWER_REQIf support multi-band,may need send two power_req couple 1:GSM 900 associated with DCS 1800,couple 2:GSM 850 associated with PCS 1900.0 means to stop the power ChampaignThen send CPHY_MULTI_CTX_RE

6、Q to BSIC verify and SI receiving,CONFIDENTIAL,11,GAP Flow-GAP when GSM Camped,PH_POWER_REQIf support multi-band,may need send two power_req couple 1:GSM 900 associated with DCS 1800,couple 2:GSM 850 associated with PCS 1900.Then send PH_MULTI_CTX_REQ to BSIC verify and SI receivingPH_UMTS_PSCH_POWE

7、R_REQ/CNFPH_UMTS_SYNC_REQ/INDPH_UMTS_SIB_CONFIG_REQOnly read MIB,not read SIB1/3,CONFIDENTIAL,12,GAP Flow-GAP interrupted by Cell Reselection,Gap is background procedureMeasurement is ongoingIf cell reselection happenSuspend the gap procedure,and resume if cell reselection finished(success/failure),

8、CONFIDENTIAL,13,GAP Flow-MSC,CONFIDENTIAL,14,Part2,Check Points Introduction,CONFIDENTIAL,Check Points Introduction,GAP Type and Result Check,CONFIDENTIAL,16,Check Points Introduction,LCR GAP When LCR Camped,CONFIDENTIAL,17,Check Points Introduction,LCR GAP When GSM Camped,CONFIDENTIAL,18,Part3,Typi

9、cal Issues Analysis,CONFIDENTIAL,Typical Issues,No Search Result:GAP Suspend,do not continue;Cant find enough PLMN info:Can not search the exist cellTake too long time:Cant finish Freq-Scan in time;Normal Service is impactedGAP is background task,can not impact PAGING etc.,CONFIDENTIAL,20,Others,N/A,CONFIDENTIAL,21,THANK YOU,CONFIDENTIAL,