与4G(LTE)网络相同，在5G(NR)网络中下行采用功率分配，上行采用功率控制的方式，以达到满足网络的信噪比和误码率，降低同频信道干扰的目的；整理：kangguoying20200623

1.5G(NR)网络功率控制

整理：kangguoying20200623

        上行链路的功率控制过程决定了不同上行链路物理信道(PUCCH、PUSCG)或信号(SRS、PRACH)的传输功率。

在无线系统中通常要求增加或减少UE或移动设备的发射功率,这就是所谓的上行能量控制。 增加发射功率以满足gNB (或基站或eNB)所需的信噪比或误码率 ;减少发射功率以尽量减少5G系统的同频信道干扰。功率控制有两种类型：开环功率控制和闭环功率控制。整理：kangguoying20200623

•    功率控制模式配置在调度（Configured Grant）信息单元中；整理：kangguoying20200623

•    调度信元的“Alpha”值为上行功率控制调整值；整理：kangguoying20200623

•    在5G(NR)网络中功率控制与参数集、子载波间隔或其他参数一同更新；整理：kangguoying20200623

•    在2μ 为5G网络的参数集，其中μ取值为0到5；整理：kangguoying20200623

•    在"TPC command"字段指示了功率调整增加或减少值；整理：kangguoying20200623整理：kangguoying20200623

2.PUSCH共享信道功率控制

        PUSCH共享信道功率控制参数计算公式如下：

        通过RRC下发的功率控制相关信息单元（取值范围）：整理：kangguoying20200623

        PUSCH-PowerControl ::=      SEQUENCE {整理：kangguoying20200623
        tpc-Accumulation     ENUMERATED { disabled }整理：kangguoying20200623
        msg3-Alpha      Alpha整理：kangguoying20200623
        p0-NominalWithoutGrant     INTEGER (-202..24)整理：kangguoying20200623
        p0-AlphaSets SEQUENCE (SIZE(1..maxNrofP0-PUSCH-AlphaSets)) OF P0-PUSCH-AlphaSet整理：kangguoying20200623
        pathlossReferenceRSToAddModList     SEQUENCE (SIZE (1..maxNrofPUSCH-PathlossReferenceRSs)) OF PUSCH-PathlossReferenceRS

        pathlossReferenceRSToReleaseList     SEQUENCE (SIZE (1..maxNrofPUSCH-PathlossReferenceRSs)) OF PUSCH-PathlossReferenceRS-Id
        twoPUSCH-PC-AdjustmentStates      ENUMERATED {twoStates}整理：kangguoying20200623
        deltaMCS      ENUMERATED {enabled}整理：kangguoying20200623
        sri-PUSCH-MappingToAddModList      SEQUENCE (SIZE (1..maxNrofSRI-PUSCH-Mappings)) OF SRI-PUSCH-PowerControl
        sri-PUSCH-MappingToReleaseList      SEQUENCE (SIZE (1..maxNrofSRI-PUSCH-Mappings)) OF SRI-PUSCH-PowerControlId}
        P0-PUSCH-AlphaSet ::=      SEQUENCE {整理：kangguoying20200623
        p0-PUSCH-AlphaSetId      P0-PUSCH-AlphaSetId,整理：kangguoying20200623
        p0      INTEGER (-16..15)整理：kangguoying20200623
        alpha      Alpha}整理：kangguoying20200623
        P0-PUSCH-AlphaSetId ::=      INTEGER (0..maxNrofP0-PUSCH-AlphaSets-1)整理：kangguoying20200623
        PUSCH-PathlossReferenceRS ::=     SEQUENCE {整理：kangguoying20200623
        pusch-PathlossReferenceRS-Id      PUSCH-PathlossReferenceRS-Id,整理：kangguoying20200623
        referenceSignal      CHOICE {整理：kangguoying20200623
         ssb-Index      SSB-Index,整理：kangguoying20200623
         csi-RS-Index      NZP-CSI-RS-ResourceId}}整理：kangguoying20200623
         PUSCH-PathlossReferenceRS-Id ::=      INTEGER (0..maxNrofPUSCH-PathlossReferenceRSs-1)
         SRI-PUSCH-PowerControl ::=      SEQUENCE {整理：kangguoying20200623
         sri-PUSCH-PowerControlId      SRI-PUSCH-PowerControlId,整理：kangguoying20200623
         sri-PUSCH-PathlossReferenceRS-Id      PUSCH-PathlossReferenceRS-Id,
         sri-P0-PUSCH-AlphaSetId      P0-PUSCH-AlphaSetId,整理：kangguoying20200623
         sri-PUSCH-ClosedLoopIndex      ENUMERATED { i0, i1 }}整理：kangguoying20200623
         SRI-PUSCH-PowerControlId ::=      INTEGER (0..maxNrofSRI-PUSCH-Mappings-1)
         BetaOffsets ::=      SEQUENCE {整理：kangguoying20200623
         betaOffsetACK-Index1      INTEGER(0..31)整理：kangguoying20200623
         betaOffsetACK-Index2      INTEGER(0..31)
         betaOffsetACK-Index3      INTEGER(0..31)整理：kangguoying20200623
         betaOffsetCSI-Part1-Index1      INTEGER(0..31)
         betaOffsetCSI-Part1-Index2      INTEGER(0..31)整理：kangguoying20200623
         betaOffsetCSI-Part2-Index1      INTEGER(0..31)
         betaOffsetCSI-Part2-Index2      INTEGER(0..31)整理：kangguoying20200623

3.PUCCH控制信道功率控制

        PUCCH共享信道功率控制参数计算公式如下：整理：kangguoying20200623

         通过RRC下发的功率控制相关信息单元（取值范围）：整理：kangguoying20200623

         PUCCH-PowerControl ::=    SEQUENCE {
         deltaF-PUCCH-f0    INTEGER (-16..15)整理：kangguoying20200623

         deltaF-PUCCH-f1    INTEGER (-16..15)
         deltaF-PUCCH-f2    INTEGER (-16..15)整理：kangguoying20200623

         deltaF-PUCCH-f3    INTEGER (-16..15)
         deltaF-PUCCH-f4    INTEGER (-16..15)
         p0-Set   SEQUENCE (SIZE (1..maxNrofPUCCH-P0-PerSet)) OF P0-PUCCH整理：kangguoying20200623

         pathlossReferenceRSs   SEQUENCE (SIZE (1..maxNrofPUCCH-PathlossReferenceRSs)) OF PUCCH-PathlossReferenceRS
         twoPUCCH-PC-AdjustmentStates   ENUMERATED {twoStates}...}整理：kangguoying20200623

         P0-PUCCH ::=   SEQUENCE {整理：kangguoying20200623

         p0-PUCCH-Id   P0-PUCCH-Id,
         p0-PUCCH-Value   INTEGER (-16..15)}
         P0-PUCCH-Id ::=    INTEGER (1..8)整理：kangguoying20200623

         PUCCH-PathlossReferenceRS ::=   SEQUENCE {
         pucch-PathlossReferenceRS-Id   PUCCH-PathlossReferenceRS-Id,
         referenceSignal   CHOICE {整理：kangguoying20200623

         ssb-Index   SSB-Index,整理：kangguoying20200623

         csi-RS-Index   NZP-CSI-RS-ResourceId}}

4.SRS参考信号

        SRS参考信号功率控制计算公式如下：整理：kangguoying20200623

        SRS配置信息中的“srs-PowerControlAdjustmentStates"即为功率控制信元整理：kangguoying20200623

5.PRACH信道整理：kangguoying20200623

5.1 PRACH功率控制公式整理：kangguoying20200623

        PRACH信道功率控制公式如下；功率攀升步长包括在“随机接入码传输”（Random Access Preamble transmission）中。整理：kangguoying20200623

5.2 随机接入响应调度字段整理：kangguoying20200623

5.3.功率调整命令（单位Db）整理：kangguoying20200623

原文来自：https://www.rfwireless-world.com/5G  整理：kangguoying20200623