5G-NR物理層過程(控制)-5G技術(shù)方案-5G關(guān)鍵技術(shù)

同步過程\h小區(qū)搜索\h小區(qū)搜索過程是UE獲得和小區(qū)時(shí)間和頻率同步，并檢測物理層小區(qū)ID的過程。\h。\hTS38.211\hUE應(yīng)假設(shè)PBCH、PSS和SSS在連續(xù)的OFDM符號(hào)內(nèi)接收，并且形成SS/PBCH塊。\h對(duì)于半幀中的SS/PBCH塊，候選SS/PBCH塊的OFDM符號(hào)索引號(hào)和第1個(gè)OFDM符號(hào)索引根據(jù)下列情況確定：\h15KHz子載波間隔：候選SS/PBCH塊的第1OFDM符號(hào)有索引{2,8}+\h14*n3GHzn=0,1。對(duì)于載波頻率大于3GHz6GHz，有n=0123。\h30KHzSS/PBCH1OFDM481620}\h+28*n。對(duì)于載波頻率小于等于3GHz，n=0。對(duì)于載波頻率大于3GHz6GHz，有n=01。30KHz子載波間隔：候選SS/PBCH塊的第1OFDM符號(hào)有索引{2,8}+14*n3GHzn=0,1。對(duì)于載波頻率大于3GHz6GHz，有n=0123。120KHz子載波間隔：候選SS/PBCH1OFDM4816,\h2028*n6GHz，有n=01235678101112,1315161718。\h240KHzSS/PBCH1OFDM81216,203236404456*n6，有n=0123567,\h8。\h一個(gè)半幀中的候選SS/PBCH塊在時(shí)域上以升序從0到L?1]L?1]進(jìn)行編號(hào)。對(duì)于\hL=4L=4或L>4L>4，UE應(yīng)根據(jù)與每個(gè)半幀內(nèi)SS/PBCH塊索引一一對(duì)應(yīng)的PBCH中傳輸?shù)腄M-RS序列索引，分別確定SS/PBCH塊索引的2或3個(gè)LSB比特。對(duì)于\hSSB-index-explicit]確定每個(gè)半幀內(nèi)SS/PBCH3個(gè)MSB\h注：DM-RS序列索引在TS38.211中定義。\hUESSB-transmitted-SIB1]被配置，SS/PBCHSS/PBCH對(duì)應(yīng)重疊的EEE-asd]SS/PBCH塊索引對(duì)于與SS/PBCHREs，UE應(yīng)接收其他信號(hào)或信道。[通過[SSB-transmitted]配置優(yōu)先于通過[SSB-transmitted-SIB1]配置。]注：Mayberemovedandcapturedin38.211。對(duì)于每個(gè)服務(wù)小區(qū)中SS/PBCH塊的接收，UE可以在每個(gè)服務(wù)小區(qū)通過高層參數(shù)\h[SSB-timing]每半幀周期性地被配置。如果對(duì)于SS/PBCH塊的接收，UE沒有每半幀被周期性配置，則UE應(yīng)假設(shè)以半幀為周期。UE應(yīng)假設(shè)在服務(wù)小區(qū)中，對(duì)于所有\(zhòng)hSS/PBCH塊，周期是相同的。\h對(duì)于初始小區(qū)的選擇，UE可以假設(shè)SS/PBCH塊半幀出現(xiàn)的周期為2幀。\h傳輸定時(shí)調(diào)整\hTimingforsecondarycellactivation/deactivation\h無線鏈路監(jiān)測\h為了向高層指示失步/同時(shí)狀態(tài)，UE應(yīng)監(jiān)測主小區(qū)的下行無線鏈路質(zhì)量。\h此處暫省略300+字，具體內(nèi)容詳見原文檔。\h[鏈路重配置過程]在一個(gè)服務(wù)小區(qū)內(nèi)為了[RSRPx或SINR]測量，UE可以配置一組CSI-RS資源或一組SS/PBCH塊索引。UE應(yīng)假設(shè)SCI-RS采用非零傳輸功率。每個(gè)CSI-RS資源參數(shù)通過高層信令配置，這些參數(shù)包括：\h\h[周期]\h\h\h[QCL\ho […]\h[Editor’snote:Forreconfigurationrequest,therearealsonoexistingagreementstodescribepreambleretransmissions,orthe\hwindowfortheUEtoreceivearesponse,ortheconfigurationoftheCORESETwherethePDCCHschedulingtheresponseistransmitted,etc.]\h上行功率控制\hUEbehaviour\hPowerheadroom\h\hUEbehaviour\h探測參考信號(hào)\h物理隨機(jī)接入信道\h在時(shí)隙ii內(nèi)，對(duì)于服務(wù)小區(qū)cc，UE通過下式確定PRACH傳輸功率：\hPPRACH,c(i)=min{PCMAX,c(i),PPRACH,target+PLc}PPRACH,c(i)=min{PCMAX,c\h(i),PPRACH,target+PLc}dBm\h其中PCMAX,c(i)PCMAX,c(i)是在TS38.133中定義的服務(wù)小區(qū)cc中在時(shí)隙iiUE\h傳輸功率，PPRACH,targetPPRACH,target由高層參數(shù)[preambleReceivedTargetPower]提供，PLcPLc是UEcc損耗，單位為dB。為了確定PPRACH,c(i)PPRACH,c(i)，UEPLcPLc。路徑損耗根據(jù)SS/PBCHPLcPLc=SS/PBCHBlockPower–higherlayer\hfdPBBwr由[yfanBTp]提供，\hRSRP在TS38.215中定義，高層濾波器配置在TS38.331中定義。\h如果一個(gè)隨機(jī)接入響應(yīng)窗口內(nèi)，如5.2小節(jié)中描述，UE不接收隨機(jī)接入響應(yīng)，隨機(jī)接入響應(yīng)包含了一個(gè)與UE發(fā)送的前導(dǎo)序列對(duì)應(yīng)的前導(dǎo)ID，UE將為隨后的PRACH傳輸確定傳輸功率，如果有的話。[TS38.321]\h載波聚合\h雙連接\h隨機(jī)接入過程\hSS/PBCHRSRP\h在進(jìn)行初始化的物理隨機(jī)接入過程之前，L1應(yīng)該從高層接收以下信息：\hPRACH（PRACH前導(dǎo)格式，用于PRACH）\h用于決定小區(qū)中根序列及其在前導(dǎo)序列集合中的循環(huán)移位值的參數(shù)（\hNCSNCS（））\h從物理層來看，物理層隨機(jī)接入過程包括PRACH中隨機(jī)接入前導(dǎo)（Msg1）的發(fā)送，PDSCH（Msg2）中的隨機(jī)接入響應(yīng)（RAR），PUSCH中的Msg3和PDSCH中的Msg4。\h批注：Tentatively,Msg3andMsg4willbedescribedaspartoftheRAprocedureduetovariousdifferencesfromPUSCH/PDSCHafterRRCconnection.\h隨機(jī)接入前導(dǎo)L1過程通過PRACH傳輸請(qǐng)求被觸發(fā)，PRACH傳輸由高層來配置。高層對(duì)PRACH傳輸?shù)呐渲冒ǎ篭h對(duì)于PRACHPRACH-config]對(duì)于PRACHPRACH-cell-idx\h前導(dǎo)索引，PRACHPPRACH,targetPPRACH,targetRA-RNTI，PRACH\h[對(duì)于PRACH\hAPRACHformatisselectedfromthepreamblesequencesetforthe\hcorrespondingpreamblesequencelengthusingthepreambleindex.\h在所指示的PRACH資源上，前導(dǎo)使用所選擇的PRACH格式發(fā)送，傳輸功率為4.4節(jié)描述的PPRACHPPRACH。\h定時(shí)\h隨機(jī)接入響應(yīng)\hUE[TS38.321RA-RNTI嘗試檢測PDCCH。窗口開始于最早的CORESET的符號(hào)。對(duì)于Type1-PDCCHUE7.1X]rar-windowlength]如果UERA-RNTI和相應(yīng)的DL-SCH傳輸塊檢測PDCCH，UE\h不檢測PDCCH或相應(yīng)的DL-SCH傳輸塊，則UE[TS38.321如果UE在時(shí)間窗內(nèi)，采用所指示的RA-RNTI和相應(yīng)的DL-SCH傳輸塊檢測PDCCH\h，高層指示[XX]比特的上行授權(quán)到物理層。這一過程被稱為物理層的隨機(jī)接入響應(yīng)\hUE應(yīng)接收PDCCHPDSCHSystemInformationBlockType1]\h的PDSCHCP的DL-SCHMSBLSB：\h[…]\h批注：TobecompletedasthecontentsoftheULgrantintheRARaredetermined.\hMsg3PUSCH\h對(duì)于Msg3PUSCHmsg3-tpUE（transformprecoding）TS38.211\hMsg3PUSCH傳輸?shù)淖虞d波間隔由高層參數(shù)[msg3-scs]提供。UE應(yīng)在相同的服務(wù)小區(qū)內(nèi)發(fā)送PRACH和Msg3PUSCH。\hMsg4PDSCH\hMsg4PDSCH傳輸?shù)淖虞d波間隔與PDSCH相同提供隨機(jī)接入響應(yīng)。\hUEprocedureforreportingcontrolinformation\hUEprocedureforHARQ-ACKcodebookdetermination\hCBG-basedHARQ-ACKcodebookdetermination批注：[HARQ-ACKinformationbits]Theactualnumberofbitstoreportcanbedifferent–e.g.withbundling.批注：[initial]Forretransmissions,decisionsareneededfor\hdynamic/semi-staticHARQ-ACKcodebookdeterminationandforpossibleDCIindications.批注：[a]Nodecisioncurrentlyexistsfor2TBs(e.g.samenumber\hforbothTBs,separatelyconfigurednumberperTB).\h批注：[theUEdetermineswhetherornotaCBGisretransmitted\hbasedonacorrespondingvalueoftheCBGTIfield]Placeholdertext–willbemodifiedoncethespecificsfortheoperationoftheCBGTIfieldaredecided.\h批注：[cc]LTEterminologyforindicatingsemi-staticcodebook(canbemodifiedonceRRCterminologyisfinalized).Statementinbracketswillberemovedifonlysemi-staticcodebookdeterminationissupportedforCBG-basedHARQ-ACK.UEprocedureforreportingHARQ-ACK\hHARQ-ACKreportinginphysicaluplinksharedchannel\hHARQ-ACKreportinginphysicaluplinkcontrolchannel\h如果UE沒有配置為PUSCH和PUCCH同時(shí)傳輸，并且UE不傳輸PUSCH，且不傳輸CSI或positive/negativeSR，則UE應(yīng)傳輸HARQ-ACK\honPUCCHformat0if\hthetransmissionisover1symbolor2symbols,\hthenumberofHARQ-ACKinformationbitsis1or2\honPUCCHformat1if\hthetransmissionisover4ormoresymbols,\hthenumberofHARQ-ACKinformationbitsis1or2\honPUCCHformat2if\hthetransmissionisover1symbolor2symbols,\hthenumberofHARQ-ACKinformationbitsismorethan2onPUCCHformat3ifthetransmissionisover4ormoresymbols,thenumberofHARQ-ACKinformationbitsismorethan[2]\hUE在一個(gè)時(shí)隙的Nslot,μsymbNsymbslot,μ個(gè)符號(hào)上發(fā)送一個(gè)或多個(gè)PUCCH。對(duì)于PUCCH傳輸時(shí)隙的參考，如果UE在PDCCH上檢測DCI格式，其中PDCCH通過一定數(shù)量的符號(hào)調(diào)度PDSCH的接收，這些符號(hào)的最后一個(gè)符號(hào)在時(shí)隙nn內(nèi)，則UE\h應(yīng)在PUCCH傳輸中提供相應(yīng)的HARQ-ACK信息，PUCCH在時(shí)隙n+kn+k上傳輸，其中kk是時(shí)隙數(shù)，且通過DCI格式中的[DL-data-DL-acknowledgement]字段來指\h示。[DL-data-DL-acknowledgement]字段的值映射到時(shí)隙數(shù)的值，見Table9.1.2-1\h中的定義。\h批注：Dynamicindicationofsymbolswithinaslotorjoint\hindicationoftime/frequency/codePUCCHresourcesisnotprecludedpendingspecificRAN1agreements.\hH\hARQ-ACKproceduresforoneconfiguredservingcell\hHARQ-ACKproceduresformorethanoneconfiguredservingcell\hUEprocedureforreportingSR批注：TherearecurrentlynoRAN1decisionsonSRtransmission\hstructureandpossiblemultiplexingwithHARQ-ACK/CSIUEprocedureforreportingmultipleUCItypes\hUCIrepetitionprocedure\hU\hEprocedureforreceivingcontrolinformation\hUE應(yīng)在一個(gè)或多個(gè)激活的服務(wù)小區(qū)或BWPs\h內(nèi)監(jiān)聽一組PDCCHDCI個(gè)PDCCH\h批注：[PDCCH候選集]Canaddmoredetailslater,suchasperactivatedcell,etc.,basedonrespectiveagreements.\hformatsCanremainapplicableforpotentiallymappingmultipleDCIformatstoasamesize(asforLTEDCIformat0andDCIformat1A).\hUEprocedurefordeterminingphysicaldownlinkcontrolchannelassignmentincommonsearchspaceUE應(yīng)在下列一個(gè)或多個(gè)搜索空間內(nèi)監(jiān)聽PDCCH候選：\hacommonsearchspaceforaDCIformatscrambledbya[SI-RNTI]onaprimarycellacommonsearchspaceforaDCIformatscrambledbya\h[RA-RNTI]onaprimarycell\hacommonsearchspaceforaDCIformatscrambledbya\h[INT-RNTI]\h[UE應(yīng)在沒有載波指示域的情況下監(jiān)聽PDCCH候選。]\h如果UEINT-RNTICRCDCIUE\hPRBsOFDMUEINT-RNTICRC檢測DCI格式，UE可以假設(shè)不在這組PRBs和OFDM符號(hào)中發(fā)送。UE通過高層參數(shù)[int-PRBs-unit]配置PRBs的指示粒度。UE通過高層參數(shù)[int-symbols-unitUENum-PDCCH-cand]來配置對(duì)于DCI\h的每個(gè)CCE聚合等級(jí)下的若干PDCCH候選，其中DCI格式使用[INT-RNTI]加擾的CRC。\h批注：[[INT-RNTI]加擾的CRC]Eventually,thisDCIformatwillhaveanameandwillbeusedtoremovethispart.\hUE procedure for determining physical controlchannelassignmentinUE-specificsearchspace\hUEQQCORESETsCORESETqq，0\h≤q<Q0≤q<Q，配置包括：CORESET-start-symb1OFDM\hCORESET-time-duration]OFDM\hCORESET-freq-domRBs\hCORESET-trans-typeCCE-to-REG\h對(duì)于交織的CCE-to-REG映射，高層參數(shù)[CORESET-REG-bundle-size]提供\hREGbundle\hCORESET-QCL-ConfigIdquasi-collocation]\h對(duì)于非交織的CCE-to-REG映射，REGbundle大小等于6。UE可以假設(shè)一個(gè)REGbundle內(nèi)的所有REGs上傳輸?shù)腜DCCH應(yīng)用相同的預(yù)編碼。\hCE-EGEGbne6Cn\hbeupdatedifadditionalREGbundlesizesaredefinedfornon-interleavedtransmissions.\h每個(gè)CORESET包含一組從0到NCCE,q?1NCCE,q?1編號(hào)的CCEs，其中\(zhòng)hNCCE,qNCCE,q是CORESETqq中的CCEs個(gè)數(shù)。UE所監(jiān)聽的PDCCH候選集定義在PDCCHUE特定搜索空間。PDCCHUE特定搜索空間在聚合等級(jí)L∈{1,2,4,8}L∈{1,2,4,8}上定義為，對(duì)于CCE聚合等級(jí)LL的一組PDCCH候選。對(duì)于一個(gè)DCI格式，UE在每個(gè)服務(wù)小區(qū)內(nèi)通過高層參數(shù)[Num-PDCCH-cand]配置每個(gè)CCE聚合等級(jí)下的一組PDCCH候選。批注：[UE特定搜索空間]Cross-carrierscheduling,includinguseof\hdifferentnumerologies,willbecapturedthroughthesearchspace.\hWPDCCH,qWPDCCH,q，\h監(jiān)聽CORESETqq中的PDCCH候選，其中對(duì)于CORESETqq的\hWPDCCH,qWPDCCH,qCORESET-monitor-period\h批注：[CORESET-monitor-period]Needtodeterminehow,basedonconfiguredperiodicity,UEmonitorsPDCCHandwhetheritisaCORESETorasearchspaceparameter.Allowedperiodicityvalues(symbol,slot,etc.)areTBD(startfrom1symbol)andaretobe\hincludedinRAN2specifications(likelynotvisiblein38.213).\h服務(wù)小區(qū)中的UEPDCCHUE指示域，UE應(yīng)在沒有載波指示域的條件下監(jiān)聽PDCCH候選。服務(wù)小區(qū)中的UE，在UE特定的搜索空間監(jiān)聽PDCCHUEUE應(yīng)使用PDCCH如果UE在另一個(gè)服務(wù)小區(qū)上被配置使用對(duì)應(yīng)于secondarycell的載波指示來監(jiān)聽PDCCH候選，UE不希望在secondarycell上監(jiān)聽PDCCH候選。[對(duì)于服務(wù)小區(qū)中的UE監(jiān)聽PDCCH候選，UE應(yīng)至少在同一個(gè)服務(wù)小區(qū)內(nèi)監(jiān)聽PDCCH候選。]\hBandwidthpartoperationwillbeattempted,asmuchaspossibletocaptureallBWP\hoperationaspectsinthisSubclausewhilereferringtootherSubclauses.Potentialoverlapswillberesolvedasthe\hspecificationsprogress.\h批注：Textissubjecttorevisionsasdescriptionsin38.211and\h38.213arealigned.\h批注：[BWP]RegardingtheCSS,heagreementforitsconfigurationisambiguous.WhichCSSconfigurationisit(e.g.isitforSIBsc