09- OWJ200107 WCDMA Power Control (With Comment) ISSUE1.0

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Transcript of 09- OWJ200107 WCDMA Power Control (With Comment) ISSUE1.0

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    www.huawei.com

    Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    C!"A #owerControl

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    Pa e2Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    1. Power Control Overview

    2. open loop #ower Control

    $. closed loop #ower Control

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    Pa e3Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    %plin& transmission character

    'el()inter(erence

    Capacity is limited *y inter(erence

    +ear)(ar eect

    -ading

    %plin& power control

    nsure uplin& /uality with minimum transmission power

    !ecrease inter(erence to other %, and increase capacity 'olve the near)(ar eect

    'ave % transmission power

    #urpose o( uplin& powercontrol

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    Pa e4Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    !ownlin& transmission character

    nter(erence among dierent su*scri*ers since the

    orthogonality is in1uenced *y transmission environment

    nter(erence (rom other adacent cells

    !ownlin& capacity is limited *y +ode3 transmission power

    -ading

    !ownlin& power control

    nsure !ownlin& /uality with minimum transmission power

    !ecrease inter(erence to other cells, and increase capacity

    'ave +ode3 transmission power

    #urpose o( downlin& powercontrol

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    Pa e5Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    The 4elationship *etween T5 #owerand 45 #ower

    0 200 400 600 800-20

    -15

    -10

    -5

    0

    5

    10

    15

    20

    Time (ms)

    Relativepower

    (dB)

    Channel

    Transmitted power

    Received power

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    Pa e6Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    #ower Control Classication

    #ower control classication open loop power control

    closed loop power control

    %plin& inner)loop power control !ownlin& inner)loop power control

    %plin& outer)loop power control

    !ownlin& outer)loop power control

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    #ower control methods adopted(or various physical channels

    #ower control methods adopted (or various physical channels

    789 : can *e applied, 9:9 : not applied

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    8/50Pa e8Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    ;. #ower Control

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    Contents

    2. open loop #ower Control

    2.1 open loop power control overview

    2.2 #4ACH open loop power control

    2.$ !#CCH open loop power control

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    10/50Pa e10Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

  • 8/9/2019 09- OWJ200107 WCDMA Power Control (With Comment) ISSUE1.0

    11/50Pa e11Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

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    12/50Pa e12Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    2. open loop #ower Control

    2.; open loop power control overview

    2.2 PRACH open loop power control

    2.$ !#CCH open loop power control

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    13/50Pa e13Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

  • 8/9/2019 09- OWJ200107 WCDMA Power Control (With Comment) ISSUE1.0

    14/50Pa e14Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

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    15/50Pa e15Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

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    16/50Pa e16Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

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    17/50Pa e17Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    2. open loop #ower Control

    2.; open loop power control overview

    2.2 #4ACH open loop power control

    2.+ DPCCH open loop power control

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    18/50Pa e18Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

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    19/50Pa e19Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

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    20/50Pa e20Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

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    21/50Pa e21Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    open loop power control o( %L !#CCHApplication scenariosApplication scenarios

    !. CCCH' RRC Connect&on Req(est

    open loop power

    control o) +PCCH

    *. +ownl &n, ncron&/at&on

    UE 0ode 1Serving RNS

    er2&ngR0C

    +CH - 3P

    Allocate R0TIelect 4! and 4$parameters

    RRCRRC

    01AP01AP

    5. Rad&o 4&n, et(p Response

    01AP01AP$. Rad&o 4&n, et(p Req(est

    RRC RRC 6. CCCH' RRC Connect&on et (p

    tart RXdescr&pt&on

    tart TXdescr&pt&on

    7. A4CAP I(b +ata Transport 1earer et(p

    RRCRRC 8. DCCH' RRC Connect&on et(p Complete

    9. Upl&n, ncron&/at&on

    01AP01AP :. Rad&o 4&n, Restore Ind&cat&on

    +CH - 3P

    +CH - 3P

    +CH - 3P

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    22/50Pa e22Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    ;. #ower Control

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    Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Closed loop power controloverview

    The characteristics o( open loop power control The results (rom open loop power control are not

    accurate enough

    open loop power control can only decide the initial

    power The advantages o( closed loop power control

    uarantee the Do'

    !ecrease the inter(erence

    ncrease the system capacity

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    Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Closed loop power control

    overview

    Inner loopOuter loop

    BLERmea>BLERtarSIRtar

    BLERmeaSIRtar

    TPC=0

    SIRmea

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    Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    $. closed loop #ower Control

    $.; closed loop power control overview

    +.2 #plin5 inner loop power control

    $.$ !ownlin& inner loop power control

    $.B

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    Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    %plin&)inner loop powercontrol

    0ode1

    UE

    Transm&t TPC

    Inner-loop

    set IRtar

    !*""H/!*""H/

    Eac UE as

    &ts own loop

    Eac UE as

    &ts own loop

    TPC +ec&s&on

    ;" ! T!? T!1

    :

    T!1

    1

    T!1

    2

    T!1

    +

    T!1

    ,

    RL!

    1: : : : : : : : : 1 : : : : :

    RL!

    2

    : : : : 1 : : : : 1 : : : : :

    RL!

    +: : : : 1 : : : : : : : : : 1

    FF FF

    TPC

    TPC%temp&

    T!

    :

    T!1 T!2 T!+ T!, T!9 T!< T! T!> T!? T!1

    :

    T!1

    1

    T!1

    2

    T!1

    +

    T!1

    ,

    : : : : 1 : : : : 1 : : : : :

    FF FF

    TPC%CM+

    Power &s controlled &n eac * t&me slots

    Te power control )req(enc &s 5""HJ

    %plin& inner)loop #CA2 with so(thandover

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    Pa e34Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Comparison *etween #CA; and#CA2The control (re/uency

    T#C;, the power control (re/uency is ;F00HG

    T#C2, the power control (re/uency is $00HG

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    Pa e35Copyright 2006 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    $. closed loop #ower Control$.; closed loop power control overview

    $.2 %plin& inner loop power control

    +.+ Downlin5 inner loop power