Volte新功能驗(yàn)證專題報(bào)告

Volte新功能驗(yàn)證專題報(bào)告一、概述VoLTE是基于IMS的語(yǔ)音業(yè)務(wù)。IMS由于支持多種接入和豐富的多媒體業(yè)務(wù)，成為全I(xiàn)P時(shí)代的核心網(wǎng)標(biāo)準(zhǔn)架構(gòu)。經(jīng)歷了過去幾年的發(fā)展成熟后，如今IMS已經(jīng)跨越裂谷，成為固定話音領(lǐng)域VoBB、PSTN網(wǎng)改的主流選擇，而且也被3GPP、GSMA確定為移動(dòng)語(yǔ)音的標(biāo)準(zhǔn)架構(gòu)。VoLTE即VoiceoverLTE它是一種IP數(shù)據(jù)傳輸技術(shù)，無需2G/3G網(wǎng)，全部業(yè)務(wù)承載于4G網(wǎng)絡(luò)上，可實(shí)現(xiàn)數(shù)據(jù)與語(yǔ)音業(yè)務(wù)在同一網(wǎng)絡(luò)下的統(tǒng)一。換言之，4G網(wǎng)絡(luò)下不僅僅提供高速率的數(shù)據(jù)業(yè)務(wù)，同時(shí)還提供高質(zhì)量的音視頻通話，后者便需要VoLTE技術(shù)來實(shí)現(xiàn)。目前LTE區(qū)域連續(xù)覆蓋區(qū)域，進(jìn)入VoLTE的發(fā)展期在這一階段運(yùn)營(yíng)商擴(kuò)大了LTE覆蓋水平，達(dá)到可以運(yùn)營(yíng)語(yǔ)音業(yè)務(wù)的條件，特別是在城市和人口密集地區(qū)；同時(shí)，LTE智能手機(jī)大量出現(xiàn)，推動(dòng)了VoLTE的發(fā)展。但目前因基站側(cè)原因?qū)е耉oLTE呼叫與切換、SRVCC流程沖突，致使VOLTE語(yǔ)音呼叫異常，目前中興在602PO2版本中已納入新版本功能內(nèi)；二、新功能簡(jiǎn)介2.1切換與呼叫流程沖突解決前期在針對(duì)網(wǎng)格拉網(wǎng)測(cè)試過程中發(fā)現(xiàn)，當(dāng)切換與Volte語(yǔ)音呼叫同時(shí)發(fā)生時(shí)，會(huì)導(dǎo)致Volte語(yǔ)音呼叫異常，嚴(yán)重影響用戶感知。11:23:02846EPSMMTRRCConnectionRequest UL_CCCH■RRCConnectionSetup DL_CCCH，RRCConnectionSetupCompleie UL_DCCHSecurltyModeCommand若在此?時(shí)間發(fā)起切換將會(huì)與DL_DCCHSecurrtyModeComplete登律立沖突，導(dǎo)致Volte呼叫異短 UL.DCCHRRCConnectionReconfiguration DL_DCCHRRCConnectionReconfigurationComplete UL_DCCHINVITE1002EPC^ASK^S回導(dǎo)，■示收釗魁清 SIPINMTE1836AS脂務(wù)囂指送“3消息.il?主叫了希合詁建立進(jìn)屬SIPRRCConnectionReconfiguration DL_DCCHUL.DCCHEPSSM. ,EPSSMUL_DCCHSIPQCI=1寫裝建立SIP■;RRCConnectionReconfigurationCompleteActivateDedicatedEPSBearefContextRequestDedcalBdE—B^jefContextAcceptULlnformationTransferPRACK7主叫怙時(shí)回應(yīng).表示已了料183提示的會(huì)話建立進(jìn)展PRACK20010AS服務(wù)囂轉(zhuǎn)送會(huì)估避程邊理晚功肩.息UPDATE11iWl向ASIK等器IR送UPDATE肖息.章在與岐叫六部協(xié)商相關(guān)SDP侑息UPDATE20014AS向王叫11:23:02846EPSMMTRRCConnectionRequest UL_CCCH■RRCConnectionSetup DL_CCCH，RRCConnectionSetupCompleie UL_DCCHSecurltyModeCommand若在此?時(shí)間發(fā)起切換將會(huì)與DL_DCCHSecurrtyModeComplete登律立沖突，導(dǎo)致Volte呼叫異短 UL.DCCHRRCConnectionReconfiguration DL_DCCHRRCConnectionReconfigurationComplete UL_DCCHINVITE1002EPC^ASK^S回導(dǎo)，■示收釗魁清 SIPINMTE1836AS脂務(wù)囂指送“3消息.il?主叫了希合詁建立進(jìn)屬SIPRRCConnectionReconfiguration DL_DCCHUL.DCCHEPSSM. ,EPSSMUL_DCCHSIPQCI=1寫裝建立SIP■;RRCConnectionReconfigurationCompleteActivateDedicatedEPSBearefContextRequestDedcalBdE—B^jefContextAcceptULlnformationTransferPRACK7主叫怙時(shí)回應(yīng).表示已了料183提示的會(huì)話建立進(jìn)展PRACK20010AS服務(wù)囂轉(zhuǎn)送會(huì)估避程邊理晚功肩.息UPDATE11iWl向ASIK等器IR送UPDATE肖息.章在與岐叫六部協(xié)商相關(guān)SDP侑息UPDATE20014AS向王叫轉(zhuǎn)送200OK治皂，通《1王叫UPDATE.^F已經(jīng)瑚里成功INMTE18016AS向王叫轉(zhuǎn)岌慌咨消息 SIPINVITE20018AS向王叫轉(zhuǎn)iflNVTTE200肩息，使旦卻廈岐叫，WIKIEE清束維功ACK19主叫向AS^ACK淌愚.意在告淋僧叫，主叫已蛭了解洛DISRVITE.青求處理成功Paging PCCHPaging PCCHPaging PCCHBYE SIPBYE200 SIPV—|RRCConnectionReconfiguration 若在此段肘間發(fā)起切挨流禰藉RRCConnectionReconfiguratonCompletee放沖突，翊V。也W勰DeactivateEPSBearerContextRequest EPSSMw，DeactivateEPSBearerContextAccept EPSSM?RRCConnectionSetupCompiete.DLlnformatlonTransfer1123:05896■DUnformationTransferDL_DCCH-■>ActivateDedicatedEPSBearerContextRequestActivateDedicatedEPSBearerContextAcceptEPSMMEPSMMUL_DCCHDLDCCH成甫誨鼬將會(huì)與Qcn肴在此段時(shí)間承甜睡動(dòng)中知lW削坨呼叫異常SecurityModeCommand/SecurityModeComplete0ULInformationTransferSecurltyModeCommandtSecurityModeComplete.RRCConnectionReconfiguration一RRCConnectionReconfigurationCompIete4INCITE3ASB^^eJI傳送判將叫y SIP.,INVITE1004向EPCAS回審濯清.表示已收到目在學(xué)試SIPINVITE1835向AS發(fā)透183,內(nèi)恩，廈示會(huì)詁建立避局 SIPQd=l弓缺崖立RRCConnectionReconfiguration DL.DCCHRRCConnectionReconfigurationComplete UL_DCCHEPSSMv」EPSSMfULInformationTransfef UL^DCCH■PRACK8AS轉(zhuǎn)送PRACK,使膻叫了料王叫已經(jīng)如遭189俊不W）內(nèi)舀PRACK2009瘴叫向AS發(fā)送183提示的會(huì)話進(jìn)程她理實(shí)DjBIPUPDATE12AS向彼叫轉(zhuǎn)送UPDATE肖皂 SIPUPDATE20013祐叫向AS發(fā)送200OK,肖息，者示UPD處IE.膏求已蛭妙理花功tINVITE18015樓叩振谷，升向AS發(fā)送18面衿信厚 SIPINVTTE20017描叫知謹(jǐn)曲*200?皂，春示最初的INVTTBHI束姓理成功ACK20AS轉(zhuǎn)岌ACK肴恩 SIP11:23:02.8461123:0285611:23:028561123:0286611:23:028661123:02.94611:23:029561123:0345611:23:0652611230652611:23:066161123:0661611:23:0661611:23:0662611:23:0662611:23:068761123:0690611:23:07.33611123:074661123:0755611:23:075761123:16.9761123:4508611.23:56.6961124:0779611:24:090761124:090961124:09.2461124:09.2461124:09.246fRRCConnectionRequest11.23:053561123:05356EPSMMUL_CCCHDL_CCCH1123:0546611:23:05486UL_DCCHDL.tXCH11:23:0548611:23:0588611:23:05886■AuthenticationRequest■AuthenticationResponse0ULInformationTransferEPSMMEPSMMUL.DCCH11:23:0589611:23:0589611:23:0589611:23:058961123:05.9061123:060161123:060161123:060961123:061061123:06.13611230627611.23:06.3061123:0630611:23:063061123:063161123:0671611:23:067261123:071361123:071361123:071661123:0722611:23:077561123:05466?RRCConnectionSetup|PCCHtServiceRequest11:23:05.356|PagingfSeivtceRequest1123:02.846fINCITE目前在602PO2版本中，當(dāng)終端進(jìn)行VOLTE語(yǔ)音呼叫過程中，如在QCI1承載建立或釋放前發(fā)起切換請(qǐng)求，基站側(cè)會(huì)將切換請(qǐng)求暫時(shí)擱置，優(yōu)先處理QCI1承載建立或釋放，以保證Volte語(yǔ)音呼叫正常；2.2SRVCC與呼叫流程沖突解決目前大部分設(shè)備廠家均不支持VOLTE業(yè)務(wù)建立過程中發(fā)生在振鈴前的eSRVCC，也就是我們常說的bSRVCCoVOLTE業(yè)務(wù)QCI1建立后到180Rining之前這段時(shí)間內(nèi)，一旦發(fā)生了SRVCC(bSRVCC)，就會(huì)引起未接通。當(dāng)前基于事件(測(cè)量報(bào)告)觸發(fā)的移動(dòng)性管理策略，網(wǎng)絡(luò)側(cè)無法避免bSRVCC發(fā)起的時(shí)機(jī)，呼叫成功率也會(huì)因此受到一定的影響。從提升用戶VOLTE業(yè)務(wù)感知及改善網(wǎng)絡(luò)KPI指標(biāo)的角度出發(fā)，控制呼叫過程中的bSRVCC是十分必要的。SRVCC發(fā)起至少要等到QCI1承載建立后，在主叫終端收到180Ringing消息前的這段時(shí)間間隔內(nèi)發(fā)生SRVCC，面臨著呼叫流程被SRVCC流程打斷的問題。因?yàn)榫W(wǎng)絡(luò)側(cè)無法控制SRVCC發(fā)起時(shí)間，所以呼叫成功率會(huì)有所影響?？刂坪艚羞^程中SRVCC的發(fā)起時(shí)間，就顯得必要。設(shè)置定時(shí)器對(duì)此功能進(jìn)行異常保護(hù)，同時(shí)也用于解決SIP信令加密的場(chǎng)景。設(shè)置定時(shí)器默認(rèn)設(shè)置8s，如果一直未收到/發(fā)出180Ringing消息或者SIP加密，最多保護(hù)8s內(nèi)不啟動(dòng)SRVCC流程，即定時(shí)器到期后，殺死定時(shí)器，且允許執(zhí)行SRVCCo具體場(chǎng)景如下:建立了QCI1,但是未收到/發(fā)出180Ring消息的UE或者定時(shí)器到期，標(biāo)識(shí)為禁止SRVCC的UEo建立了QCI1,已經(jīng)收到/發(fā)出180Ring消息的UE或者定時(shí)器到期，標(biāo)識(shí)為允許SRVCC的UE。若基站解析SIP信令，當(dāng)檢測(cè)到180Ringing消息后，UE的狀態(tài)由禁止SRVCC狀態(tài)轉(zhuǎn)化為允許SRVCC狀態(tài)。由于以后的核心網(wǎng)可能會(huì)支持，所以需要增加一個(gè)開關(guān)控制，即：若核心網(wǎng)支持bSRVCC切換，則不觸發(fā)SRVCC延遲切換。UE上報(bào)A2門限，下發(fā)UE能力支持的系統(tǒng)的B1/B2測(cè)量時(shí)，此時(shí)正常下發(fā)SRVCC相關(guān)的異系統(tǒng)測(cè)量，不受SIP消息影響。三、新功能驗(yàn)證對(duì)比測(cè)試3.1切換與呼叫流程沖突解決驗(yàn)證測(cè)試前期在網(wǎng)格拉網(wǎng)測(cè)試中發(fā)現(xiàn)當(dāng)承載建立或釋放與切換流程存在沖突時(shí)，會(huì)導(dǎo)致Volte呼叫異常，以下為前期拉網(wǎng)測(cè)試切換與Volte呼叫專載釋放沖突導(dǎo)致的問題點(diǎn)：從路測(cè)軟件來看，1月8日，9:36:21主叫上發(fā)invite并于9:36:27.919會(huì)話正常建立。會(huì)話建立滿180s后，主叫終端于9:39:28.620向網(wǎng)絡(luò)側(cè)發(fā)送BYE，并于9:39:28.777收到BYE200，此時(shí)執(zhí)行切換動(dòng)作，并且之后未收到專載去激活信令，未能正常釋放QCI=1專載，于是CDS在9：39：33.792報(bào)一個(gè)calldrop事件（CDS特色功能：主叫收到BYE200之后，如果5s內(nèi)沒有收到專載去激活，則生成一個(gè)CALLdrop事件）。被叫則在9:39:28.605切換完成后，于9:39:28.933收到BYE消息，被叫掛機(jī)并回復(fù)BYE200給網(wǎng)絡(luò)側(cè)，之后也執(zhí)行切換動(dòng)作，但有收到專載去激活信令，正常釋放專載。主被叫的無線環(huán)境如下：

收到被叫BYE200后，主叫的信令如下:琳睥■M■qRfiCCmnecacrteocHyu1aftonTfl*：DCXXJLbcvcton:DwrinkDogtcrTehSp：IM:毋LETpet^p:3-BJ3W523吐*<T-eefratafl^!LTEMng37900，W3DLCCCHM^a^e8NdSflnneCterAjKE^5Mit*rwifl土琳睥■M■qRfiCCmnecacrteocHyu1aftonTfl*：DCXXJLbcvcton:DwrinkDogtcrTehSp：IM:毋LETpet^p:3-BJ3W523吐*<T-eefratafl^!LTEMng37900，W3DLCCCHM^a^e8NdSflnneCterAjKE^5Mit*rwifl土EMhCcnELnkSumEFFreq?EEs方*t￡」邱幣”WCWft*g:j*VMdwlypf AMR而fRfl炊口》1白&￡■儂HtMih中■世健DCCJJt BCCl4>泗內(nèi)SksWBYE泗■JE；gft.cl>Mfi”cinrivjafl!nCgpilil.DCCMfaturirntfflRupoit OCO■和響 KO:Sj^fntiQwf eCDU^fTntx^Pfipra&PI* BCC3fhH些ur，EWgrt OCO.MajiiiyrE岫 DCCl05:1928714網(wǎng):網(wǎng)2ftTHDS3*S2S777Q4：3f24W2H.39就衲M3AJ491TMssasirM-3a?917做搏31933033931U￡05^35055河g海M2932089D93932&B90939?69?6Hjnd^r*區(qū)?！穏掉小財(cái)由Ewnt4309J53207XPvathIU自茹[R煙i37W&-159--.■■iiii型口珀海gmPriehU±^1[flAJiRanabm4C￡t￡￡SUKI11；Pr?ftMsg3(UEID>L?■.■■孔A03.19-320J4.從上述無線側(cè)的信息可以看出此時(shí)無線環(huán)境較好，但由于在BYE200之后存在切換流程的，引起切換流程與專載管理流程沖突，導(dǎo)致主叫未收到專載去激活NAS信令，最終觸發(fā)CDS產(chǎn)生掉話事件?；旧?jí)602P02版本后，選取蒙自市新移動(dòng)樓-LZHQ、蒙自市怡景花園-LZHQ站點(diǎn)進(jìn)行切換與呼叫流程沖突測(cè)試，測(cè)試選取短呼，增加呼叫次數(shù)，同時(shí)通過參數(shù)修改增加乒乓切換次數(shù)，以復(fù)現(xiàn)切換與呼叫流程沖突；1、主叫在11:30:28.489上發(fā)invite后，隨后在11:30:28.598上發(fā)切換請(qǐng)求，如下圖:

16-06-23sicmEEfiABbetupAttemptEfLABSetupSuccessLTEEvent_A3LTEInti"aH：mdovei"RequestLTEInti"aH：mdovei"SuccessVOLTEMOCallAlertingLTEEvent_A3VOLTEMOCallEstablishedLTEEvent_A3LTEInti"aH：mdovei"RequestLTEIntraHartdoverSuccess16-06-23ll：30：28.4T316-06-2311:30:28.16-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-2311111111111111111116-06-23sicmEEfiABbetupAttemptEfLABSetupSuccessLTEEvent_A3LTEInti"aH：mdovei"RequestLTEInti"aH：mdovei"SuccessVOLTEMOCallAlertingLTEEvent_A3VOLTEMOCallEstablishedLTEEvent_A3LTEInti"aH：mdovei"RequestLTEIntraHartdoverSuccess16-06-23ll：30：28.4T316-06-2311:30:28.16-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-2316-06-231111111111111111111130:28.67630:29.69030:29.73730:29.78430:30.53330:31.06330:32.93530:34.94730:34.994[H]LTEServing/Neighb蒙自市新移動(dòng)^-EZHQ-001蒙自市怡景花園l-EZHQ-002蒙自擊新移動(dòng)檔-LZHQ-D03iHlServingCellD回 以ParamValueFaramValueRSRP(dBm) 437RSRQ(dB) ^^87RSSI(dBm) -64.762SINK(dB) 10.8CRSSINR(dB)CellAllowed...CellBarredCellReservedTACECI34374146078721DRSSINK(dB)Pathloss(dB)SRSPower(dBm)PCI311SRSRBNumber 1管小+|魅在列名稱 ，中搜素卜4|?方向協(xié)議名稱時(shí)間4&ECCH_HL_ECHSystemIn￡ormationBlocks16-06-23113U:25.447&BCCH_HL_SCHSystemInfoi'mationBlocks16-06-231130:25.447&BCCHHLSCHSystemInfoi'mationBlocks16-06-231130:25.463&hl_hcchUiCConnectionReconfiguratirn16-U6-Z31130:25.525t1-[L_HCCHJiJiCConnectionReconfiguratirnComplete16-06-231130:25.541&BCCHHLSCHSystemInfoi'mationBlocks16-06-231130:25.541t1-[L_HCCHMeasurementRepoi't16-06-231130:25.743&nL_nccHJiJiCConnectionReconfiguratirn16-06-231130:25.790t1-[L_HCCHJiJiCConnectionReconfiguratirnComplete16-06-231130:25.931tReipiestTMERTFTWVTTE 16-06-231130:28.473D|UL_DCCHiMeasurementReport16-06-2311:30:28.489&StatusIMS_SIP^INVITE->Trying(100)16-06-231130:28.598&nL_nccHJiJiCConnectionReconfiguratirn16-06-231130:28.614t1-[L_HCCHJiJiCConnectionReconfiguratirnComplete16-06-231130:28.676&NAS-ESMActivatededicatedEPStearercontsirt...16-06-231130:28.692tNAS-ESMActivatededicatedEPSbearerconteirt...16-06-231130:28.692tl.[L_HCCH1JLInformationTransfer16-06-231130:28.692&hl_hcchUiCConnectionReconfiguratirn16-U6-Z31130:29.581t1-[L_HCCHJiJiCConnectionReconfiguratirnComplete16-06-231130:29.597&NAS-ESMModifyEPSbearercontenti"equest16-06-231130:29.597tNAS-ESMModifyEPSbearercontentaccept16-06-231130:29.597tl.[L_HCCH1JLInformationTransfer16-06-231130:29.612&StatusIMm_SIF_INVITE-冷essionj'ro尸ess(183)16-06-231130:29.612tReipiestIMS_SIP_PJLACK16-06-231130:29.690tl.[L_HCCHMeasurementRepoi't16-06-231130:29.690■-&IlLJCCHJiJiCConnectionReconfiguratirn16-06-231130:29.737tl.[L_HCCHRRCConnectionReconfigiai"aticnComplete16-06-231130:29.784&BCCH_HL_SCHSystemInfoi'mationBlockType116-06-231130:29.799&ECCH_HL_SCHSystemIn￡ormationBlocks16-06-231130:29.799信令列表2、基站版本升級(jí)602P02后，基站的側(cè)對(duì)于在Volte呼叫流程中觸發(fā)的切換暫時(shí)擱置，優(yōu)先進(jìn)行Volte語(yǔ)音呼叫，保證Volte語(yǔ)音呼叫正常進(jìn)行，如下圖:回信令列表雅$家天下-LZHQ護(hù)國(guó)路。X$?| |在列名稱 ▼中搜素29.59729.59729.61229.69029.73729.78429.79929.79929.79929.81529.87730.06530.09630.14330.18930.51730.53331.06332.93532.935日34.94734.994▼303030303030303030303030303030303030303030303029.581會(huì)*手??|在列名稱，中搜素MSI @MEI pMSI 翌EfiAIlSetupSuccessLTEEvent_A316-06-2311:30:29.690LTEIntraH：mdovei"Request16-06-2311:30:29.737VOLTEM0CallAlerting16-06-2311:30:30.533LTEEvent_A3VOLTEM0CallEstablished30303034.947_34.994J]35.025▼16-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-2311回事件列表EfLABSetupAttempt16-06-2311:30:28.61416-06-2311:30:31.06316-06-2311:30:32.935Requestl.[L_HCCHHL_HCCHLTEIntraH：mdovei"Success回信令列表雅$家天下-LZHQ護(hù)國(guó)路。X$?| |在列名稱 ▼中搜素29.59729.59729.61229.69029.73729.78429.79929.79929.79929.81529.87730.06530.09630.14330.18930.51730.53331.06332.93532.935日34.94734.994▼303030303030303030303030303030303030303030303029.581會(huì)*手??|在列名稱，中搜素MSI @MEI pMSI 翌EfiAIlSetupSuccessLTEEvent_A316-06-2311:30:29.690LTEIntraH：mdovei"Request16-06-2311:30:29.737VOLTEM0CallAlerting16-06-2311:30:30.533LTEEvent_A3VOLTEM0CallEstablished30303034.947_34.994J]35.025▼16-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-231116-06-2311回事件列表EfLABSetupAttempt16-06-2311:30:28.61416-06-2311:30:31.06316-06-2311:30:32.935Requestl.[L_HCCHHL_HCCHLTEIntraH：mdovei"SuccessVDLTEMUCallAttempt16-06-2311:30:25.385nL_nccHJiJiCConnectionReconfigurationl.rL_HCCHFlLCCoririectionRecon￡igurationCompleteNAS-ESMModiEyEPSbearercontenti-equestNAS-ESMModiEyEPSbearercontentacceptl.rL_HCCHStatusRequestIMS_SIP_PJLACKI.ILJICCHMeasurementRepoi'tnL_nccHJiJiCConnectionReconfigurationl.[L_HCCHBCCH_HL_SCHJiJiCConnectionRecon.figiai"ationCompleteSystemInformationBlockType1BCCH_HL_SCHSystemInformationBlocksBCCH_HL_SCHBCCH_HL_SCHnL_nccHJiJiCConnectionReconfigurationl.[L_DCCHRF1CCorcnectionRecon￡igm"ationCompleteSystemInformationBlocksIMS_SIP_PRACK->OK(200)Reqiiestl.[L_HCCHnL_nccHi.rL_ncr.HStatusStatusl.[L_HCCHStatusIMS_SIP_INVITE->Session_Progress(183)SystemSystemBCCH_HL_SCHStatusMeasurementRepoi'tJiJiCConnectionReconfigurationMeasurementRepoi'tJiJiCConnectionReconfigurationLTEEvent_A3LTEIntraH：mdovei"RequestLTEIntraH：mdovei"Success16-06-231116-06-231116-06-2311InfnrmationBlocksInfnrmationBlocksIMS_SIP_UPDATE->OK(200)IMS_SIP_INVITE->Ringing(180)MeasurementRepoi'tIMS_SIP_INVITE->OK(200)傳芟IF_虻:K|LTEE*nt_A316-06-2311:30:28.489CellNameNsEABFCNPCIRSRP(dBm)RSRQ(蒙自市新移動(dòng)1S-LZHQ-C0138勵(lì)3ll■.437蒙自市恰景花園-LZHQ-C02蒙自市新移動(dòng)1S-LZHQ-C033840038400344310-93.625fj.312.25-14.93JjI~ ■?1I 用- 」[H]LTEServing/NeighborFaramValueFaramValueBSBP(dBm)437CellAllowed...RSRQ(dB)-SfnSTCellBarredBSSI(dBm)-64.T62CellReservedSIHR(dB)10-8TAG34374匚RSECI146078721IUSSHIR(jiB)Pathloss(dB)SRSPower(dBm)PCI311SBSRBNumber回ServingCell從驗(yàn)證測(cè)試數(shù)據(jù)可以看出當(dāng)切換與Volte呼叫專載建立或釋放沖突時(shí)，基站側(cè)會(huì)優(yōu)先處理Volte呼叫專載建立或釋放，以保證Volte語(yǔ)音通話正常進(jìn)行，從而提升用戶感知;3.2SRVCC與呼叫流程沖突解決驗(yàn)證測(cè)試由于目前大部分設(shè)備廠家均不支持VOLTE業(yè)務(wù)建立過程中發(fā)生在振鈴前的eSRVCC，也就是我們常說的bSRVCCoVOLTE業(yè)務(wù)QCI1建立后到180Rining之前這段時(shí)間內(nèi)，一旦發(fā)生了SRVCC(bSRVCC)，就會(huì)引起未接通。當(dāng)前基于事件(測(cè)量報(bào)告)觸發(fā)的移動(dòng)性管理策略，網(wǎng)絡(luò)側(cè)無法避免bSRVCC發(fā)起的時(shí)機(jī)，呼叫成功率也會(huì)因此受到一定的影響。前期對(duì)網(wǎng)格進(jìn)行拉網(wǎng)測(cè)試中，會(huì)出現(xiàn)振鈴前SRVCC，影響網(wǎng)格指標(biāo)，且接到用戶投訴Volte用戶感知差；以下為前期拉網(wǎng)測(cè)試SRVCC與Volte呼叫專載釋放沖突導(dǎo)致的問題點(diǎn)：從路測(cè)軟件來看，10:45:06.849主叫上發(fā)invite并于10:45:07.120收到被叫響應(yīng)的invite100消息，隨后建立QCI1承載；

UE1_LTENCellsUE2_LTENCellsEARFCNPCI10:45:06.85710:45:06.87210:45:06.87410:45:06.90710:45:06.90910:45:06.91110:45:06.91510:45:06.964D..EARFCNDL10:45:06.968D..EventsExtraPCI10:45:06.970D..10:45:07.120SIPRRCState10:45:07.146CRSRSRP□10:45:07.153CRSSINR10:45:07.157ActivateDedicatedEPSBearerContextR...TMModeConnectionRe10:45:07.15910:45:07.16010:45:08.886104507?R4,MpasurpmpntRrnofL10:45:08.888CallblockedPDSCHRb/s10:45:08.89110:45:08.8990.121s10:45:08.9020.126sPUSCHRb/s10:45:08.9420.194s0.102sCallincomingULPHYThrput(kbZs)ULMCSActivateDedicatedEPSBearerContextA...ULlnformationTransferCallalertingCallconnected,1ll.312schanneltypen?_UE1_LTENCellsUE2_LTENCellsEARFCNPCI10:45:06.85710:45:06.87210:45:06.87410:45:06.90710:45:06.90910:45:06.91110:45:06.91510:45:06.964D..EARFCNDL10:45:06.968D..EventsExtraPCI10:45:06.970D..10:45:07.120SIPRRCState10:45:07.146CRSRSRP□10:45:07.153CRSSINR10:45:07.157ActivateDedicatedEPSBearerContextR...TMModeConnectionRe10:45:07.15910:45:07.16010:45:08.886104507?R4,MpasurpmpntRrnofL10:45:08.888CallblockedPDSCHRb/s10:45:08.89110:45:08.8990.121s10:45:08.9020.126sPUSCHRb/s10:45:08.9420.194s0.102sCallincomingULPHYThrput(kbZs)ULMCSActivateDedicatedEPSBearerContextA...ULlnformationTransferCallalertingCallconnected,1ll.312schanneltypen?_lyimeMessagesQ:::Type10:45:06.849IfINVITE PIP__110:45:06.85511ServiceRequestEFSl.ll.l9RRCConnectionRequestRRCConnectionSetup9RRCConnectionSetupCompleteSecurityModeCommandOSecurityModeCompleteRRCConnedionReconfigurationORRCConnectionReconfigurationCompleteULRRCConnedionReconfigurationDLORRCConnectionReconfigurationCompleteULOMeasurementReport ULINVITE100RRCConnedionReconfigurationDL_D...0RRCConnectionReconfigurationCompleteUL_D...EPSSMD..3790021037900201 -1237900202M16 |1637900211 (116 |l6EARFCNPCITimeMessages Q::Type-10:45:07.648PagingpcchH10:45:08.870■PagingPCCH10:45:08.874■tServiceRequest■epsm10:45:08.876，RRCConnectionRequestUL_C(10:45:08.895■RRCConnectionSetupDL_C(10:45:08.897，RRCConnectionSetupCompleteUL_D(DL_D(口10:45:08.928■SecurityModeCommand10:45:08.931令SecurityModeCompleteUL_D<10:45:08.933ARRCConnectionReconfiaurationDLD(▼10:44:42.85910:44:42.86110:44:51.275Prach:Msg3(UEID)。HandoversuccessRRCrelease38400-404->z10:45:08.872|Pagingreceived 10:45:08.88010:45:08.88310:45:06.853'Callattempt10:45:06.859Prach:Msg1(RA)10:45:06.861Prach:Msg2(RAR)10:45:06.865Prach:Msg3(UEID)10:45:06.868Prach:Msg410:45:06.870Randomaccesssuccess10:45:06.876腹RRCsetupsuccess10:45:06.921ServicesetupsuccessEPSSMCQIAverageDLPHYThrput(kbZs)DLMCSDLRTPPacketLoss(%)RTPPacketE2EDelay(ms)UEGPSTimeStatusVocoderType10:45:09.05110:45:10.35910:45:15.65810:45:15.664Audio手機(jī)狀態(tài)0.156sPrach:Msg1(RA)Prach:Msg2(RAR)Prach:Msg3(UEID)Prach:Msg4Randomaccesssuccess恩RRCsetupsuccessPagingresponsesuccessServicesetupsuccess但在10:45:10:183主叫信號(hào)持續(xù)變差并上發(fā)B2測(cè)量報(bào)告，開啟觸發(fā)SRVCC切換，但主叫此時(shí)未收到被叫響應(yīng)的180Rin消息，SRVCC與Volte呼叫流程沖突致使主叫未接通;TimeMessagesQ：：：Type10:45:09.340OMeasurementReportUL_D...10:45:09.497■RRCConnedionReconfigurationDL_D...10:45:09.507OTimeMessagesQ：：：Type10:45:09.340OMeasurementReportUL_D...10:45:09.497■RRCConnedionReconfigurationDL_D...10:45:09.507ORRCConnectionReconfigurationCompleteUL_D...10:45:09.511OMeasurementReportUL_D...10:45:09.542?DLlnformationTransferDL_D...10:45:09.544?ModifyEPSBearerContextRequestEPSSM10:45:09.546。ModifyEPSBearerContextAcceptEPSSM10:45:09.548OULInformationTransferUL_D...10:45:09.649■INVITE183SIP10:45:09.652tPRACKSIP10:45:10.048?PRACK200SIP10:45:10.104tUPDATESIP10:45:10.183|TMeasurementReportUL_D...10:45:10.309?MobilityFromEUTRACommandDL_D...r~il10:45:10.345?HandoverCommandGSM...U10:45:10.348ChannelRequestGSM...10:45:10.510?PhysicalInformationGSM...10:45:10.514個(gè)HandoverCompleteGSM...104510547JLPhysicalInformationGSMC<Callblocked 7/8>￥??▲10:45:09.342TEventB2-118,-8110:45:09.514TEventB2-118,-7510:45:10.186EventB2-116,-7310:45:10.311誓IRATL->GHOstart10:45:11.373&IRATL->GHOsuccess0.110s10:45:13.870HandoverinBandsuccessBCCH:11->16□10:45:15.74310:45:16.358IRATG->LreselectstartUE1_LTENCells[UEL.GSMNCELUIEARFCNPCI37900210379002113790020237900201379001273790012638400336RSRPRSRQ■116.51-11.4|12O -15ll20 |-18-15-16EARFCNDL37900PCI210RRCStateConnectCRSRSRP.僵CRSSINR1.1TMMode3CQIAverage7.5DLPHYThrput(kbZs)19.8DLMCS0PDSCHRb/s888ULPHYThrput(kbZs)8.4ULMCS12PUSCHRb/s72DLRTPPacketLoss(%)RTPPacketE2EDelay(ms)UEGPSTimeStatusVocoderTypeAMRWB?L w JEARFCNPCIRSRP RSRQ38400 336|-648 -5.7TimeMessagesQ:::Type▲10:45:10.286UPDATESIP10:45:10.354tUPDATE200SIP10:45:10.357tINVITE180SIP10:45:11.791?PagingPCCH10:45:12.758tINVITE200SIP10:45:13.002,PagingPCCH10:45:15.564?PagingpcchD10:45:15.656?ackSIP10:45:15.661XBYESIP▼/匚m_J卜38400336Connect36.746.31617629.311272TimeEvents Qi*iExtra10:45:10.359Callalerting10:45:15.658◎Callconnected1.312s10:45:15.664kCalldroppedchanneltypem10:45:28.200EventA3-84,-7510:45:28.205EventA3-84,-7510:45:28.281RRCrelease10:45:28.368RRCrelease10:45:47.261Pagingreceived10:45:47.270Prach:Msg1(RA)ConnectionRe10:45:47.273Prach:Msg2(RAR)10:45:47.275Prach:Msg3(UEID)10:45:47.277Prach:Msg410:45:47.280Randomaccesssuccess10:45:47.317曜R(shí)RCsetupsuccess0.127s10:45:47.319Pagingresponsesuccess0.131s10:45:47.337Servicesetupsuccess0.167s從上述無線側(cè)的信息可以看出此時(shí)無線環(huán)境較差，致使主叫上發(fā)B2測(cè)量報(bào)告觸發(fā)SRVCC切換，SRVCC切換與Volte呼叫流程沖突致使主叫未接通;基站升級(jí)602P02版本后，選取蒙自市怡景花園-LZHQ、站點(diǎn)進(jìn)行SRVCC與呼叫流程沖突測(cè)試，測(cè)試選取短呼，增加呼叫次數(shù)，同時(shí)通過參數(shù)修改SRVCC觸發(fā)門限（將本系統(tǒng)門限改為-100dbm），增加SRVCC發(fā)生機(jī)率，以復(fù)現(xiàn)SRVCC與呼叫流程沖突；在現(xiàn)場(chǎng)進(jìn)行Volte語(yǔ)音呼叫并使之發(fā)生SRVCC，共測(cè)試50余次，測(cè)試中發(fā)現(xiàn)SRVCC均在180Ring消息后發(fā)起，未與Volte語(yǔ)音呼叫沖突，具體如下：在蒙自市怡景花園地下室進(jìn)行SRVCC與Volte、呼叫流程沖突測(cè)試，在差點(diǎn)，信號(hào)低于-100dbm無線環(huán)境下，主叫上發(fā)invite隨后建立QCI1承載，而此時(shí)主叫無線環(huán)境持續(xù)變

差，信號(hào)一度低于-110dbm,但均未觸發(fā)SRVCC；13.6ExtraExtraUE1AudioAudio17:24:04.092個(gè)RRCConnectionSetupComplete17:24:06.183?RRCConnectionSetupSecurityModeCommand0SecurityModeCompleteRRCConnectionReconfiguration，RRCConnectionSetupComplete?SecurityModeCommand0SecurityModeCompleteCanAttempting17:24:04.14117:24:04.14817:24:04.15117:24:06.18517:24:06.19217:24:06.19617:24:04.15617:24:04.22917:24:04.23417:24:04.2370RRCConnectionReconfigurationCompleteUL_D...?RRCConnectionReconfigurationDL_D...0RRCConnectionReconfigurationCompleteUL_D...RRCConnectionReconfiguration0RRCConnecdonReconfigurationCo...RRCConnectionReconfiguration0RRCConnectionReconfigurationCo...*/UE1_LTENCells匚UE1_GSMNCELU|-1EARFCNPCIRSRPRSRQTimeMessages3895023017:24:03.640 ?Paging7UE2_LTENCellsEARFCNPCIIUE2.GSMNCELU|RSRPRSRQQ:::Type*PCCH~?INVITE10017:24:06.20017:24:06.205Time Messages17:24:04.083fINVITE17:24:04.085EPSMM17:24:06.073EPSM17:24:06.074?RRCConnedionRequestEARFCNDL17:24:06.26617:24:06.29817:24:06.30117:24:06.30517:24:06.30817:24:06.349Time17:24:04.086個(gè)RRCConnectionRequest17:24:04.090?RRCConnectionSetup389503895038400389503895017:24:06.22023023017:24:06.225RRCStateCRSRSRPCRSSINRTMModeCQIAverageDLPHYThrput(kbZs)DLMCSPDSCHRb/sDLRTPPacketLoss(%)RTPPacketE2EDelay(msX13.6ExtraExtraUE1AudioAudio17:24:04.092個(gè)RRCConnectionSetupComplete17:24:06.183?RRCConnectionSetupSecurityModeCommand0SecurityModeCompleteRRCConnectionReconfiguration，RRCConnectionSetupComplete?SecurityModeCommand0SecurityModeCompleteCanAttempting17:24:04.14117:24:04.14817:24:04.151