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1、Log Analysis Series - GAPCONFIDENTIALSW1/L1CT3G Technology Company 2Revision HistoryVersionChange DescriptionsDateEditors V0.1Draft Template07/18/2009Wang QiuhuiV1.0Add GAP Part07/27/2009Liu XuanbingT3G Technology Company 3ApprovalNameFunctionDept.DateContent Basic Flow Introduction Check Points Int
2、roduction Typical Issues Analysis OthersCONFIDENTIAL4Part1Basic Flow IntroductionCONFIDENTIALGAP Overview GAP-Get Available PLMNInitiation: NAS requests RR to report all PLMNs currently available. user request or; A timer expiry in NAS The periodic power campaign timer expires in Limited service mod
3、e NAS asks RR to camp on a cell belonging to HPLMNCONFIDENTIAL6GAP Overview GAP Type (From Implementation) GAP when LCR Camped LCR GAP when LCR Camped; GSM GAP when LCR Camped;GAP when GSM Camped LCR GAP when GSM Camped; GSM GAP when GSM Camped;CONFIDENTIAL7GAP Flow-GAP when LCR CampedCONFIDENTIAL8G
4、AP Flow-GAP when GSM CampedCONFIDENTIAL9GAP Flow- LCR GAP when LCR CampedCPHY_DWPCH_DETECT_REQ(first time, returnAll = FALSE) CPHY_DWPCH_DETECT_REQ(second time) From this, the procedure is similar as ICS for L1C CPHY_CELL_SYNC_REQ CPHY_CELL_SYNC_IND At most 3 cells and with 0xFF to indicate the end
5、CPHY_SIB_CONFIG_REQ CPHY_SIB_SCHEDULE_REQ General said, 1 means MIB, 2 means SB1 PHY_SIB_IND Need Decode MIB, SIB1/3 to get the suitable information of the cell in the PLMNCONFIDENTIAL10GAP Flow- GSM GAP when LCR Camped First send CPHY_POWER_REQ If support multi-band, may need send two power_req cou
6、ple 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_REQ to BSIC verify and SI receivingCONFIDENTIAL11GAP Flow- GAP when GSM Camped PH_POWER_REQ If support multi-band, may need send two power_req couple 1: GS
7、M 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_POWER_REQ/CNF PH_UMTS_SYNC_REQ/IND PH_UMTS_SIB_CONFIG_REQ Only read MIB, not read SIB1/3CONFIDENTIAL12GAP Flow-GAP interrupted by Cell Reselection Gap is
8、 background procedure Measurement is ongoing If cell reselection happen Suspend the gap procedure, and resume if cell reselection finished(success/failure)CONFIDENTIAL13GAP Flow-MSCCONFIDENTIAL14Part2Check Points IntroductionCONFIDENTIALCheck Points IntroductionGAP Type and Result CheckCONFIDENTIAL1
9、6StepSearchKeyWordsCheckPointsAnalysis Result1_PLMN_GAP TypeManul GAP:SPVNETL23MMM| TRA_SYS_SEND_TO_PC |CAPI_REG_AVAIL_PLMN _REQ L23MMML23RRC|TRA _SYS_SEND_TO_PC |RR_GET_PLMN_REQ | 2RR_GET_PLMN_Check GAP resultRR_GET_PLMN_CNF345Check Points IntroductionLCR GAP When LCR CampedCONFIDENTIAL17StepSearch
10、KeyWordsCheckPointsAnalysis Result1CPHY_DWPCH_D ETECT_REQ(first time, returnAll = FALSE)Valid FreqSearch valid Freq band2CPHY_DWPCH_D ETECT_REQAll Freq/FreqBand Searched: 2010-2025 1880-1900Confirm one full-search3CPHY_SIB_CONFI G_REQValid cellCheck all valid cell found 45Check Points IntroductionLC
11、R GAP When GSM CampedCONFIDENTIAL18StepSearchKeyWordsCheckPointsAnalysis Result1StartUARFCN|Sto pUARFCNAll Freq/FreqBand Searched: 2010-2025 1880-1900StartUARFCN and StopUARFCN are fields in PH_UMTS_PSCH_REPOR T_REQ2PH_UMTS_SIB_C ONFIG_REQValid cellCheck all valid cell found 345Part3Typical Issues A
12、nalysisCONFIDENTIALTypical IssuesNo 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 impacted GAP is background task, can not impact PAGING etc.CONFIDENTIAL20Others N/ACONFIDENTIAL21THANK YOUCONFIDENTIAL
