NR PHR功率余量三类型上报与定时器触发博弈

graph TB
    subgraph "PHR三类型体系"
        T1["Type 1 PH<br/>PUSCH信道<br/>PCMAX - PPUSCH"]
        T2["Type 2 PH<br/>PUCCH信道<br/>PCMAX - PPUCCH"]
        T3["Type 3 PH<br/>SRS信道<br/>PCMAX - PSRS"]
    end

    subgraph "触发条件"
        TR1["phr-PeriodicTimer超时"]
        TR2["路径损耗变化 ≥ dl-PathlossChange"]
        TR3["SCell激活"]
        TR4["RRC重配置PHR参数"]
        TR5["FR2 MPE P-MPR变化"]
    end

    subgraph "MAC CE封装"
        SE["Single Entry PHR<br/>仅PCell<br/>LCID=56"]
        ME["Multiple Entry PHR<br/>PCell+SCells<br/>LCID=54/57"]
    end

    TR1 & TR2 & TR3 & TR4 & TR5 --> T1 & T2 & T3
    T1 & T2 & T3 --> SE & ME

    SE --> gNB["gNB调度器<br/>调整MCS/RB/层数"]
    ME --> gNB

sequenceDiagram
    participant UE as UE MAC层
    participant Timer as 定时器管理
    participant gNB as gNB调度器

    Note over UE: PHR触发条件评估

    rect rgb(240, 248, 255)
        Note over UE,Timer: 触发条件1: phr-PeriodicTimer超时
        Timer->>UE: phr-PeriodicTimer expiry
        UE->>UE: 触发PHR → periodicPHR-Timer重启
    end

    rect rgb(255, 248, 240)
        Note over UE,Timer: 触发条件2: 路径损耗变化
        UE->>UE: 测量下行路损变化
        UE->>UE: ΔPathloss ≥ dl-PathlossChange?
        Timer->>UE: phr-ProhibitTimer已超时或未运行?
        UE->>UE: 两条件同时满足 → 触发PHR
    end

    rect rgb(240, 255, 240)
        Note over UE,Timer: 触发条件3: SCell激活
        UE->>UE: 收到Activation MAC CE
        UE->>UE: 该SCell配置了PHR → 触发PHR
    end

    rect rgb(255, 255, 230)
        Note over UE,Timer: 触发条件4: RRC重配置
        UE->>UE: 收到RRCReconfiguration<br/>包含PH-Config修改
        UE->>UE: 触发PHR + 重启所有定时器
    end

    rect rgb(248, 240, 255)
        Note over UE,Timer: 触发条件5: FR2 MPE P-MPR变化
        UE->>UE: FR2场景 P-MPR变化 ≥ dl-PathlossChange
        Timer->>UE: phr-ProhibitTimer已超时或未运行?
        UE->>UE: 触发PHR
    end

    Note over UE,gNB: PHR已触发，等待UL Grant
    UE->>UE: 构造PHR MAC CE
    UE->>gNB: PUSCH携带PHR MAC CE
    gNB->>gNB: 解析PH值，调整调度策略

|  Bit 7 | Bits 6-1          |
|   R    |    PH (6 bits)    |    Oct 1
|  Bit 7 | Bits 6-1          |
|   R    |  PCMAX,f,c (6b)   |    Oct 2

Oct 1: | C7 | C6 | C5 | C4 | C3 | C2 | C1 | C0 |  (SpCell + SCell 1~7)
Oct 2: | C15| C14| C13| C12| C11| C10| C9 | C8 |  (SCell 8~15, 如需要)
...

graph LR
    subgraph "Multiple Entry PHR MAC CE"
        B["Bitmap<br/>C0|C1|C2|C3<br/>1byte"]
        PH1["SpCell Type2 PH<br/>+ PCMAX<br/>2bytes"]
        PH2["SpCell Type1 PH<br/>+ PCMAX<br/>2bytes"]
        PH3["SCell1<br/>PH+PCMAX<br/>2bytes"]
        PH4["SCell2<br/>PH+PCMAX<br/>2bytes"]
        PH5["SCell3<br/>PH+PCMAX<br/>2bytes"]
    end

    B --> PH1 --> PH2 --> PH3 --> PH4 --> PH5

|  C  |          PH (6 bits)         |  R  |    Oct N (PH字段)
|            PCMAX,f,c (6 bits)      | R|R |    Oct N+1 (PCMAX字段)

sequenceDiagram
    participant RRC as RRC层
    participant MAC as MAC层
    participant PHY as PHY层
    participant gNB as gNB

    Note over RRC,gNB: 阶段1: RRC配置PHR参数

    gNB->>RRC: RRCReconfiguration<br/>包含PH-Config
    Note over RRC: phr-PeriodicTimer = sf200<br/>phr-ProhibitTimer = sf50<br/>dl-PathlossChange = dB3<br/>multiplePHR = true<br/>phr-Type2-OtherSCell = true
    RRC->>MAC: 配置PHR参数<br/>启动phr-PeriodicTimer

    Note over MAC,gNB: 阶段2: 定时器超时触发

    MAC->>MAC: phr-PeriodicTimer超时
    MAC->>MAC: 触发PHR<br/>PHR-State = triggered
    MAC->>MAC: 重启phr-PeriodicTimer

    Note over MAC,gNB: 阶段3: 等待UL Grant

    gNB->>MAC: DCI Format 0_1<br/>UL Grant
    MAC->>MAC: 检查PHR-State = triggered

    Note over MAC,PHY: 阶段4: 构造PHR MAC CE

    MAC->>MAC: 遍历所有激活服务小区
    MAC->>MAC: 构造Bitmap (C0~Cn)
    MAC->>MAC: 计算SpCell Type2 PH
    MAC->>MAC: 计算SpCell Type1 PH
    MAC->>MAC: 计算SCell1 PH (Type1)
    MAC->>MAC: 计算SCell2 PH (Type1)
    MAC->>MAC: 组装Multiple Entry PHR MAC CE
    MAC->>MAC: 复用到PUSCH<br/>LCID=54(MCG)

    MAC->>PHY: MAC PDU (含PHR CE)
    PHY->>gNB: PUSCH传输

    Note over gNB: 阶段5: gNB处理

    gNB->>gNB: 解析PHR MAC CE
    gNB->>gNB: 更新每小区功率状态
    gNB->>gNB: 调整后续调度决策<br/>MCS/RB/层数/功率控制TPC

PH-Config ::= SEQUENCE {
    phr-PeriodicTimer          ENUMERATED {sf10, sf20, sf50, sf100, sf200, sf500, sf1000, spare},
    phr-ProhibitTimer          ENUMERATED {sf0, sf10, sf20, sf50, sf100, sf200, sf500, sf1000, spare},
    phr-Tx-PowerFactorChange   ENUMERATED {dB1, dB3, dB6, spare},
    multiplePHR                BOOLEAN,
    dualCellPHR                BOOLEAN,  -- 仅EN-DC场景
    ...
}
-- CA场景下SCell的PHR类型配置
phr-Type1-OtherSCell         BOOLEAN,  -- 为SCell使能Type1 PH
phr-Type2-OtherSCell         BOOLEAN,  -- 为SCell使能Type2 PH (PUCCH)
phr-Type3-OtherSCell         BOOLEAN,  -- 为SCell使能Type3 PH (SRS)

stateDiagram-v2
    [*] --> NotConfigured: 初始状态
    NotConfigured --> Configured: RRC配置PH-Config
    Configured --> WaitingTrigger: 启动phr-PeriodicTimer

    WaitingTrigger --> Triggered: phr-PeriodicTimer超时
    WaitingTrigger --> Triggered: 路损变化≥阈值<br/>& prohibitTimer超时
    WaitingTrigger --> Triggered: SCell激活
    WaitingTrigger --> Triggered: RRC重配置

    Triggered --> WaitingGrant: 设置PHR=triggered

    WaitingGrant --> Constructing: 收到UL Grant

    Constructing --> WaitingTrigger: PHR MAC CE已发送<br/>重启periodicTimer<br/>启动prohibitTimer

    WaitingTrigger --> NotConfigured: RRC释放/重配置清除

graph TD
    subgraph "UE侧"
        PC["上行功率控制<br/>PUSCH/PUCCH/SRS<br/>TS 38.213"]
        PH["PHR计算<br/>PCMAX - 实际功率"]
        MPE["MPE功率回退<br/>FR2场景"]
    end

    subgraph "gNB侧"
        SCH["调度器<br/>MCS/RB/层数决策"]
        TPC["TPC命令<br/>DCI中的功率调整"]
        POL["策略引擎<br/>PHR阈值判断"]
    end

    PC --> PH
    MPE --> PC
    PH -->|"PHR MAC CE"| POL
    POL --> SCH
    POL --> TPC
    TPC -->|"DCI"| PC
    SCH -->|"调度决策"| PC