CSFB常見回落失敗分析

1、CSFBCSFBCSFBSGSCSFBMO關(guān)于2GBSCLTESGS4G2G策略中的典型問題研究GSM3GMSCMME2G4G2G4G2GSGS4G2G)1'35G)1UmUEBSC/PCUS1-MMELTE-UuVIMERMCNod&SSG3NeNcdB5CSFB:LTE92/3GT2/3G9'ml一三CQZIS09汕卿U三話CC睛2HI冋略坦IIIIII兇:.uIfflKfHw-rut京es丄丄呂富絡(luò)建CJ殺応t3(J<hJ_c土丑】Dy,1嵋BsdU沏謝5''J-揄Lla-.m-威I工i上監(jiān)他Ilull船二一-穌*三£<|亠-

2、宣葩慳|>|畀“-111甜''J-:FLLJn切川33壬mu35壬9£鬲UJLMIAlCuu6ouo三UO4OULUOC-NVd三-d號工Qcon6dddQcoQcoB歲山Cluooaqp趁soododd怒CQZISOZ常譽附韜ffl陽吉!r川ijll-J號卷川&盂I衛(wèi)二ffiKf蠱5耶IJIE.r斷慝柵用邀一監(jiān)慟lull陽二35壬9£侖L1J巨巨山匕個Qcon山匕01MME和SGSN將BSS和eNodeB2G/3GeNodeBeNodeBGSMRRCreleaseSIB13緩讀：終端LTE的2G系統(tǒng)消息SI1SI13同GPRS相關(guān)，R8CSF

3、B返回技術(shù)不考慮網(wǎng)絡(luò)FR)1FR22GT3GT4G2G2G播TD-STD-SLTE4GTD-S且TD-S32GT4G2G2GLTE4GSI2SI3SI4SI13SI132GFR回3G，大于TD-LCSFB幵或要嘰3.1在MSCPOOL邊界無法被叫問題分析1)可利用現(xiàn)網(wǎng)MSCPOOL組網(wǎng)模式，減少SGsMSC改造量MSCPOOLUEPOOLMSCPOOL結(jié)構(gòu)，可以POOLMSCCSFBMSCPOOLPOOLMSCUESGsMSCTACLACUESGsMSCPOOLPOOL優(yōu)點1：減少祐sklH改造礙量II包漲合聊樹西更鹽勰中.由MME進定伽L內(nèi)一個tftiSGsMStJFf注冊IIUE回禪到期G

4、阿絡(luò)帆P0的喘可以孫還仍由這餐9定囪1SC為L那務(wù)IIIPOOLtS點豈減歩駛換機區(qū)善的觀率:UElnl時.弗tl癟到POOL內(nèi)蘋G製U廉播由斥合橢陸置更護般巾選定住!ISGsVSC;無洗皿3是吾匹£郝力交撓機內(nèi)回落，灶觀咒；|I只有在POOL2/5G輕舌邊弘LEP隹時丁叮他需到用鄰PCO血2掃舌網(wǎng)現(xiàn)為駭換|imr性菲於差；圖9_MSC組POOL2)MSC組POOL邊界無法被叫問題分析2G4G/MSCPOOL1 MSCPOOLTACLACMMETA-LA-MSCTACLAC153247.504MSIWASMS->elTodeE153247.506MSIl.rL-DCCHMS-&

5、gt;efodeB15324T.532MSIDL-DCCMeUodeB->fflS15324T.534MSIl.rL-DCCHMS->e3IodeE15324T.606MSIDL-DCCHelTodeS->MSExterideiiServiceRequestirLIrLtorniatiotlTr：itleterFLFLCCorLTLHctiijrJlecontiui-：=lti口血FLFlCCorLTLHctiijrJLecontijir寶ti口血匚crnpletsFLFlCCorLTLt：ctiijnKmleast!15151515151515151515323232323

6、2323232323249.240MSI51.361MSI51.456MSI52.538MSI52.538MSI52.540MSI53.244 MSI53.245 MSI53.947MSI59.055MSIASASASASASffffffffffASASASASASffffffffffULDLULDLULLoc：=ltin.UpdatirLgFlCquestAutherLticationRequestAiithentic：ition三pon三已Loc：±tioilUpdatiiLgAcceptTMSIEe：=LllocationCompletEULCMServiceRequeetDL

7、CMSerwicekcceptULSetiipDLCallFroceeilingDLAlerting位直更新11POOLTACLACMSCPOOLMSCPOOLpagingpagingPOOLPagingPOOLTACLACMSCPOOLUE11MSCPOOL<滋GLA(/LTETA跨POOL2GR81、3、5、7GSM900MSCPOOLpagingMSCPOOLT兀二辿OCDOtOtDOC3：3iLiocARJCX:C:-:0iOi-badIndi;atcE：c；3130C：)TfcllC7LLjAP?：Q；0tt£-plicitLL£tO:AP?：Q;11El*

8、DOCOtDOCDL-AR?：Q-7iLi；5GE?AK:0xlOtDOCDOlAR?：Q-7iLi；5GE?AK:0x3-tDOCDOtLtlAR?：Q-7iLi；5GE?AK:0x5OCDOtOtlllAR?：Q-7iLi；5GE?AK:0x?DOCOtWDL-AR?：Q-7iLi；5GE?AK:0x?(?)OtDOC101-tJ01DOCLtlotwOtlltDOCLtJOIE-失敗場景TAf和LAC對亶關(guān)乘弄密，肝ML1中的T忙本來應(yīng)該和LAU對跳如果槁心網(wǎng)虬將TA3與恥口中的LA4對應(yīng),即TA3=LA45將產(chǎn)生未接RRCConnectionRelease11、69-93MSCPOOL

9、31MSCPOOLpagingMSCPOOLPaging匸-O01nonOCmeri-cue101-MIDIm-O01nm0CmeEl-CDLCEC-M1011匸-O01nonar?:q圖l12e?RRCConnectionReieasenuri-AFHERa迎組：:0x45i59i3CLCElAFTERS迎組：:0>:46i?0i-M1011AFTERS迎組：曲暑i?Li1：hTQRa迎組:血5：i8I)hTQRa迎組:血52182)hTQRa迎組:血53I8-)hKT+a迎組:血54184)hTQRa迎組:血5518=)hTQRa迎組:血56i8t)hTQRa迎組:血57187)hT

10、QRa迎組:血58i8E)-713?!)：:Ok5918S)hTQRa迎組:血5ai9)hTQRa迎組:血5b191)hTQRa迎組:血5c192)hTQRa迎組:血5BI9-)-OOC%CSFBMSCPOOLRRCConnectionRelease8378LTEMSCPOOLLACMSCPOOLUl所在位直為HSQ區(qū)域，由于所在位的是2於擴段頻點回退,導(dǎo)致U1逼回亦語音，根稠帯號酸度進行盲重左向吋，邊界MtePOOLl信號更野，導(dǎo)致粧叫未接通事fhIU2U2所在位置為MSG!區(qū)域，由于所在恆禮POOLS界區(qū)城祐小區(qū)比13RRCConnectionReieas死帶頻黑改進原理',即4G

11、對應(yīng)的2嗣退頻點只酬應(yīng)同“恥下周邊頻點，有效抑制事忡2G301C03C0300C0-ge：£H3tartLnjTCH:0xC(C：jancZdi.zasci:desL3C010)EolloTJingARFCysCO*2:plizitListOEARFC30010-*3C0L0LC0L1-030LC0L1LJ-00C03C0*iiR?Cir-ValueGE?AJ:0x31$二iiR?Cir-ValueGE?AJ:0x<ei7E：14RRCConnectionReleasePOOLMSCPOOLMSCPOOL1)LTEPOOLMSCMTRFPOOLMTRFPOOLPOOLMSCPO

12、OLMSCMTRFoldMSCMSCnewMSCMSCpagingresponseMV：EPC2G15MSCMSC之-歸洌、，臺參數(shù)設(shè)置問題導(dǎo)致語音回落A隸胡無IJ5RI+P主吋1丈返辦lj用HLR/H場別或刃氐弁藝豈更斯卻注機3怙MSC題路£覽譏蘭卩佶垃將畔卩聶由到揺c1$CPacing:GldMSC慮逛Ge接口尋幷樓1用門魏順皿.LH般回駆醫(yī)隅山魏國罔務(wù)色蟲止U住INewM史也豈工扌灘:賦懈國0d負稠呢杠魏鴿揺陽dTKF,表術(shù)州洶史比MTRFXUdi&Lcca:iorN曲MSC?JHLR/H5S£'L；i歐測血Scat切:HLR/H拓且陸OlcMH亂述臣

13、MTRF連連接接亞賓NewW菟堰黑11伽訂MSC嘶*|葩幣川的r?scRRCConnectionReleose4G主叫起呼后（被CSFBCSFB3GCSFBAlerting19s16CSFBRRCConnectionRelease2453.6'dSMSINASMS->eNodeBEz-zteniledServiceJiequestCSFBUFll|注屯£3.711UL-ULUJi帕-旭壯心上；blbLULctitlectiorifleques+62453.740MSIDL-CCCHeNodeB-)fflSPJiCCoriTLectioriSetupftitc建立(624

14、53.746MSI1L-HCCHMS->eNodeBFlFiCCoriTLectioriSetupCompletaLLW!f"41t1.、1M-rl-.P1.bZ-4=30.ii蘭rni-nh!H0QEIJ-.-TlliriTiLeizin-1i-jTiioaeiorTini：=ltlii：.62453.774MSI1_L-HCCHMS->eNodeBFlFiCSecurityfflodeCamplete：.62453.774MSIHL-IICCHeNodeB-)fflSFlFiCCotitlectionJ；Econfigixratiotl：,62453.761MSIUL

15、-DCCHMS->eNodeEJlFiCCctitlectionJ：BconfiguratioilCe：.62453.826MSIDL-DCCHeNodeB-)fflSICEC:ELpabilityEnquiry：.62453.828MSIHL-IICCHeNodeB-)fflSFlFiCCoriTLectio匸lF；皀configm-atiotl：.62453.829MSI1_L-HCCHMS->eNodeBl.fEC：±patilitylnforrn宜tic-n手機能力：.62453.845MSI1_L-HCCHMS->eNodeBFlFiCCormectior

16、iJ；皀configur：=l*iotlCompletmrr-jnnr'r-11rrThrirLXIT1l-iiTiU之七UULlMl>1UL.JJLLJLRiaxiiHu1e:dTS>L£HilltilLJ.t«±pUCC162454.775MSIUL-DCCHeNodeB-JlFiCCctitlectiorifieconfiguration162454.778MSIUL-DCCHMS->eNodeBPJiCCoriTLectiorJiecoutigm-atiotlCc-m衛(wèi)1已te162455.407MSIHL-IICCHeNodeB

17、-)fflSFlFiCCoriTLectio匸lF；皀coutigm-atiotl162455.411MSI1_L-HCCHMS->eNodeBIlFiCCoriTLectionJ；Ecoutigm-atiotlCc-m衛(wèi)1ete162456.347MSIHL-IICCHeNodeB-)fflSFlFiCCormectioriJ；皀configuratiotl162456.351MSI1_L-HCCHMS->eNodeBFlFiCCormecti。匸lF；ecoutigixratiotlCompl已te162457.337MSIUL-DCCHeNodeB-JlFiCCctitlec

18、tionJ：Bconfiguration162457.341MSIUL-DCCHMS->eNodeBPJiCCoriTLectiorJiecoutigm-atiotlCc-m衛(wèi)1已te162458.327MSIHL-IICCHeNodeB-)fflSFlFiCCoriTLectio匸lF；皀coutigm-atiotl162458.331MSI1_L-HCCHMS->eNodeBIlFiCCoriTLectionJ；Ecoutigm-atiotlCc-m衛(wèi)1ete162459.337MSIHL-IICCHeNodeB-)fflSFlFiCCormectioriJ；皀configur

19、atiotl162459.341MSI1_L-HCCHMS->eNodeBFlFiCCormecti。匸lF；ecoutigixratiotlCompl已te162501.346MSIUL-DCCHeNodeB-JlFiCCctitlectionJ：Bconfiguration162501351MSIUL-DCCHMS->eNodeBPJiCCoriTLectiorJiecoutigm-atiotlCc-m衛(wèi)1已te162502.356MSIHL-IICCHeNodeB-)fflSFlFiCCoriTLectio匸lF；皀coutigm-atiotl162502.361MSI1_L

20、-HCCHMS->eNodeBIlFiCCoriTLectionJ；Ecoutigm-atiotlCc-m衛(wèi)1ete162503.驅(qū)EMSIHL-IICCHeNodeB-)fflSFlFiCCormectioriJ；皀configuratiotl冉U3.370MSIUL-DCCHMS->NodE；UiCCormectionJ；mccmtigixratiotlComple+eIERAB異.b2!>Lid.349MS!libCH.ULHlasterIntuiniati口丁違丄ocK：.62506.369MSIBCCH.BLSyslntoTypeSBl-JLa：.62506.429

21、MSITiCCH.ULM：ieterIntornisiti口丁遷；1ock?R-S162E08814MSIffASDLCMServiceA-:cept162508814MSIMASULSetuji16258814MSIDCCHULljplinkDirectTr=ltlsfer162508943MSIDCCHDLIloviTilin_kDirectTr：diLEter162508944MSIWASDLCallProceeding162509103MSIDCCHDLHowruLiniDirectTi-：=ltleter162E09104MSIffASDLEoutiAre注UpdateAccept1

22、62509105MSIMASULEoutinp;AreaUpdateComple16259105MSIDCCHULljplinkDirectTr=ltlsfer162509113MSIDCCHDLIloviTilin_kDirectTr：diLEter162509114MSIWASDLLlodifyPDFCcntentEeiuestCNETWORKTOMS.162509114MSIWASULLlodifyPDFCcntentAccept(MSTO1TETW0RK.162E09115MSIDCCHULljplinkDirectTr：=lTlefer162509744MSIDCCHDLEadioB

23、e=lter162511095MSIDCCHULEadioBe=lterSetupComplete162511333MSIDCCHDLFileasurementCcjittirol162511533MSIDCCHDLLIeNETiremwntC口口七工ol1625124LI0MSIDCCHULLIe：iEnj±_emEntlieport1F,pF1?F73MF：1TllTHTIT,TlnwT|-|itilrFlir+Ti-sti=：1-pv1625125T4MSIffASDLAlertirLg3GSE鈴1625IS773MSIDCCHDLIloviTlIiriJkDirhictTf：

24、=ltleter162EIS774MSIffASDLCoriiLectBGdS#it>25187T4hi51UL-CoriiLHctAckiLjw1edge1625187T4MSIDCCHULljpliTikDirectTr:=ltleferIF.昨32.733MSIDCCHDLIlowilLirikDirtptTr：±he£ht162532733MSIffASDLHiscorLTLect162532.733MSI1TASULEeLease16CSFBRRCConnectionRelease1S1NASLTE胡込>雜FagingIS：LL-ZCCHrS-5ode

25、J1S1LL-ZCCH胡ode?-細E1S1IL-DCCH1S1LL-DCCHsBode3-S1S1IL-DCCHHS>eiel1S1IL-DCCHEBode3-SIS：IL-DCCHrS-5odeJ1S1LL-DCCH胡ode?-細E1S1IL-DCCH1S1LL-DCCHsBode3-S1S1LL-DCCH昭-沁丁沁遷1S1IL-DCCHEBode3-SIS：LL-DCCHrS-5odeJ1S1LL-DCCH胡ode?-細E1S1LL-DCCH1S1LL-DCCHsBode3-S1S1LL-DCCHHS>eiel1S1IL-DCCHEBode3-SIS：LL-DCCHrS-5o

26、deJVS-)ieH皿TExt五mm:MA-CSFBtUS：IL-DCCH胡ode?-細EFlFfl：iiiLT.ecti3ii£ecuestEfUCijiLT.ectidjiSetupF1FL7CiiiLT.ectiDJiSetufiZDupleF1FL7Secu_ilitLc<tiTiandF1FL7Secu：_i10，'：'11criplsieF1FJCijiLr.ectitlLh<：onfi尹mtiociF1F12CiiiLT.ecti3Tl£h匚mcfirni-：=.ticinConlEtEUE二ipitilit/EnquiryIfEZ

27、ip:itilitliLf匚miatioilF1FL7CliLT.ectitlRhcunfi尹wtionF1FL7CuiLT.ectitlRh匚口n£iHTnitionConfleF1FJCijiLr.ectitlLh<：onfi尹mtiociF1F12CiiiLT.ecti3Tl£h匚mcfirni-：=.ticinConlEtEEfUCiiiLT.ecti3TlRhrnnfl尹:wtionF1FL7CiiiLT.ectijlILe匚dtlEiziLr：=.ticinConlEF1FL7CliLT.ectitlRhcunfi尹wtionF1FL7CuiLT.ecti

28、tlRh匚口n£iHTnitionConfleF1FJCijiLr.ecti打lLecctlEl尹mtiociERHdu.ecti血已i皿firnt：itionConTleteF1FL7CiiiLT.ectitlRhIe：匹三crc-rransacticiLldeiitifier:0x0(0)riticalExteiLEiciisclKJtCCoILlE.crioE.R-dca5eeeZotinectioijF.c1c££e-i8releaseCause:oJie(L)nccBCC-JTC-Eigit:0x4：4iMCC-EKC-I：igit:0x6：6iMCC-EKC-I：igit:OxO：0inncITE中VIS：1S1MSTEOCH.eBodeB-SMaEterlnfom-ljcnBLjzkEOCH.sBode3-SSTstenlnfornadcnBLj：kTj-pelTCCfT胡0血3-船PagLiigHCC-MJJC-DLjLt:3kO(0)HCC-MJJC-DLLt:3kOfO)SIBl時M匚C和WNC17CSFBLogCSFBUE18CSFB4G網(wǎng)絡(luò)并Release據(jù)協(xié)議規(guī)定，當(dāng)UEUE為主叫方時，T3417ext超時后，UE主動搜將先搜索3G小區(qū)，后搜索2G小區(qū)；當(dāng)UE為被重定向命令(RRCConnectionUET341