5G(NR)無線網(wǎng)絡中上行時間提前量是基于gNB提供給UE的TA命令，其具體應用于PUSCH,PUCCH和SRS；TA取值和執(zhí)行、空口下發(fā)的消息內容如下：整理:kanguoying20200627

1.TA（Timining  Advance)取值

        Timing Advance命令由6 bit構成，總共有64個，范圍從-32到32 Tc;  整理:kanguoying20200627

        1個Tc為0.509，取值范圍：-16.3到16.3 us. 整理:kanguoying20200627

2. TA（Timining  Advance)應用（執(zhí)行）整理:kanguoying20200627

        當UE收到TA值后，將在其收到后的第6個上行slot上應用；根據(jù)38.213-4.2說明，UE在slot n上收到TA值后，該值將在slot n+6上啟用；整理:kanguoying20200627

3.隨機接入響應消息中TA的配置整理:kanguoying20200627

         ServingCellConfigCommon ::= SEQUENCE {整理:kanguoying20200627

           physCellId            PhysCellId OPTIONAL, -- Cond HOAndServCellAdd,整理:kanguoying20200627

           downlinkConfigCommon   uplinkConfigCommon                           UplinkConfigCommon OPTIONAL, --         Need M整理:kanguoying20200627

           supplementaryUplinkConfig     UplinkConfigCommon OPTIONAL, -- Need S

           n-TimingAdvanceOffset                        ENUMERATED { n0, n25600, n39936 } OPTIONAL,

           ssb-PositionsInBurst                     CHOICE {整理:kanguoying20200627

              shortBitmap                       BIT STRING (SIZE (4)),整理:kanguoying20200627整理:kanguoying20200627

              mediumBitmap                      BIT STRING (SIZE (8)),

              longBitmap   BIT STRING (SIZE (64))   }

         OPTIONAL, -- Cond AbsFreqSSB整理:kanguoying20200627

           ssb-periodicityServingCell  ENUMERATED { ms5, ms10, ms20, ms40,  ms80, ms160, spare2, spare1 }

           dmrs-TypeA-Position             ENUMERATED {pos2, pos3},整理:kanguoying20200627

           lte-CRS-ToMatchAround     SetupRelease { RateMatchPatternLTE-CRS } ,整理:kanguoying20200627

           rateMatchPatternToAddModList     SEQUENCE (SIZE (1..maxNrofRateMatchPatterns))          OF         RateMatchPattern整理:kanguoying20200627

           rateMatchPatternToReleaseList         SEQUENCE (SIZE         (1..maxNrofRateMatchPatterns))                    OF RateMatchPatternId OPTIONAL,

           subcarrierSpacing               SubcarrierSpacing    OPTIONAL,整理:kanguoying20200627

           tdd-UL-DL-ConfigurationCommon     TDD-UL-DL-ConfigCommon OPTIONAL, -- Cond TDD

           ss-PBCH-BlockPower INTEGER (-60..50),   ...}整理:kanguoying20200627

4.業(yè)務態(tài)TA命令配置整理:kanguoying20200627

        業(yè)務態(tài)終端的時間提前量根據(jù)其TAG進行配置，在RRC消息中下發(fā)給UE；整理:kanguoying20200627

    MAC-CellGroupConfig ::= SEQUENCE {整理:kanguoying20200627

       drx-Config    SetupRelease { DRX-Config } OPTIONAL, -- Need M

       schedulingRequestConfig  SchedulingRequestConfig OPTIONAL, -- Need M

       bsr-Config                   BSR-Config OPTIONAL, -- Need M整理:kanguoying20200627

       tag-Config                   TAG-Config OPTIONAL, -- Need M

       phr-Config        SetupRelease { PHR-Config } OPTIONAL, -- Need M

       skipUplinkTxDynamic    BOOLEAN,   ...,   [[整理:kanguoying20200627

       csi-Mask-v1530               BOOLEAN OPTIONAL , -- Need M整理:kanguoying20200627

       dataInactivityTimer-v1530  SetupRelease { DataInactivityTimer } OPTIONAL -- Need   PCellOnly   ]]} 

    TAG-Config ::= SEQUENCE {   tag-ToReleaseList            SEQUENCE (SIZE (1..maxNrofTAGs)) OF TAG-Id     OPTIONAL, -- Need N整理:kanguoying20200627

    tag-ToAddModList  SEQUENCE (SIZE (1..maxNrofTAGs)) OF 

    TAG OPTIONAL -- Need N} 整理:kanguoying20200627

    TAG ::= SEQUENCE {

   tag-Id TAG-Id,整理:kanguoying20200627

   timeAlignmentTimer TimeAlignmentTimer,   ...}整理:kanguoying20200627

TAG-Id ::= INTEGER (0..maxNrofTAGs-1) // maxNrofTAGs = 4 

TimeAlignmentTimer ::= ENUMERATED {ms500, ms750, ms1280, ms1920, ms2560, ms5120, ms10240, infinity}

原文來自：http://www.sharetechnote.com/整理:kanguoying20200627