2、也證明兩者是可行且有效的:通過快速重配縮短呼叫時(shí)延,根據(jù)深圳測(cè)試的結(jié)果,3.4k信令可縮短430ms時(shí)延,目前已合入正式版本,外場(chǎng)應(yīng)用反饋良好;而UuLI和lub并行,根據(jù)DEM0測(cè)試結(jié)果,作為主叫時(shí)可縮短時(shí)延SOnis,作為被叫時(shí),也可以縮短55ms,由于某些原因還未合入正式版木,但已推廣到軟切換加時(shí)使川該策略,達(dá)到明顯效果。下面將詳細(xì)介紹這兩種優(yōu)化方案。二、快速重配目前的同步重配,是NodeB、UE和RNC用戶面同時(shí)在一個(gè)預(yù)定的激活點(diǎn)切換到新的配置,而事實(shí)上,空口的重配可以更快的完成,這樣就造成UE和
3、UTRAN網(wǎng)絡(luò)進(jìn)行無(wú)謂的重配等待??焖僦嘏湓恚褐嘏鋾r(shí),NodeB在檢測(cè)到新配置的上行擾碼后,切換到新的配置,類似于異步重配的處理。為了節(jié)省N0DEB檢測(cè)上行擾碼的消耗,RNC提供CFN信息,表示新配置在UE側(cè)生效的最早時(shí)間。快速重配目前只用于第一次業(yè)務(wù)建立和服務(wù)鏈路改變兩種場(chǎng)景,后臺(tái)分別有對(duì)應(yīng)的開關(guān)控制,默認(rèn)關(guān)閉。Restore2.1快速重配流程分析:UENodeBSRNCCN1.RABASSIGhWENlREQUEST2.F^DIOLINKRECONFIGUFWTIONR如10LINKRECONFIG
4、URATIONREADY(Synchronised)PREPPRE(SErordsed)卜時(shí)P4..RADIOBEA.?ERSETUP&R如10LINKRECONFIGUR^TIONCOMuiIT(Synchrouad)6.r如iolinkRestore7..RAD10BEAREFSETUPCOMPLETENBAPNBAP<^RRC>8.RABASSIGWENTRESPONSE1CN向RNC發(fā)送Rab指派請(qǐng)求,發(fā)起RAB建立過程;2SRNC向所控制的NodeB發(fā)送無(wú)線鏈路重配置準(zhǔn)備消息RADTOLTNKR
5、ECONFIGURATIONPREPAREo如果麻臺(tái)開關(guān)打開了快速重配開關(guān),則該消息中帶入FastReconfigurationModeIE信息和新配置的上行擾碼信息,表示做快速重配:882010-03-2310:22:05.232InRNCEVUCPMCRLMM..RL—PREPARE892010-03-2310:22:05.232OutRNCEVRLMMCRMCACPREPARE902010-03-2310:22:05.232InRNCEVCRMRLMMCACRESPONSEOB912010-03-2
6、310:22:05.232RNLC->RNLUFpSRecReq922010-03-2310:22:05.242RNLC<-RNLUFpSRecRsp932010-03-2310:22:05.242INTERNALEVRANUENEXT.PROCESS942010-03-2310:22:05.242NODEB<-RNCRadioLinkReconfigurationPrepareFDDMsg952010-03-2310:22:05.282NODEBRNCRadioLinkReconfigurationRe
7、adyMsg962010-03-2310:22:05.282OutRNCEVSMAEstablishReq972010-03-2310:22:05.282OutRNCEVSMAEstablishReq982010-03-2310:22:05.282OutRNCEVSMAEstablishReq992010-03-2310:22:05.282InRNCEVSMAEstablishCfm1002010-03-2310:22:05.282InRNCEVSMAEstablishCfm1012010-03-2310
8、:22:05.282InRNCEV.SMA.EstablishCfmIIILinkMessageOperationmessageDataStat.TextDecodeTNBAP_Message.tMsgHead.nMsgType=1TNBAP_Message.tMsgHead.tProclD.procedurecode=31TNBAP.Message.tMsgHead.tProclD.ddMode=TNBAPJddTNBAP_