OWA200003 WCDMA Radio Interface Physical Layer (for RNO) ISS

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    HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

    www.huawei.com

    Internal

    OWA200003WCDMA Radio Interface

    Physical Layer

    ISSUE 1.0

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    The physical layer offers data transport

    services to higher layers.

    The access to these services is through the

    use of transport channels via the MAC sub-

    layer.

    The physical layer is expected to perform the

    following functions in order to provide the

    data transport service,for exampleModulation and spreading/demodulation and

    despreading, Inner - loop power control ..ect.

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    References

    l TS 25.104 UTRA (BS) FDD Radio

    Transmission and Reception

    l TS 25.201 Physical layer-general description

    l TS 25.211 Physical channels and mapping of

    transport channels onto physical channels (FDD)

    l TS 25.212 Multiplexing and channel coding

    (FDD)

    l TS 25.213 Spreading and modulation (FDD)

    l TS 25.214 Physical layer procedures (FDD)

    l TS 25.308 UTRA High Speed Downlink Packet

    Access (HSDPA); Overall description; Stage 2

    l TR 25.877 High Speed Downlink Packet Acces

    (HSDPA) - Iub/Iur Protocol Aspects

    l TR 25.858 Physical layer aspects of UTRA High

    Speed Downlink Packet Access

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    l Upon completion of this course, you

    will be able to:

    [ Understand radio interface

    protocol Architecture

    [ Understand key technology of

    UMTS physical layer

    [ Understand UMTS physical layer

    procedures

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    Chapter 1 Physical Layer OverviewChapter 1 Physical Layer Overview

    Chapter 2 Physical layer key technologyChapter 2 Physical layer key technology

    Chapter 3 Physical Layer Processing ProcedureChapter 3 Physical Layer Processing Procedure

    Chapter 4 Physical Layer ProceduresChapter 4 Physical Layer Procedures

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    UTRAN Protocol Structure

    RNS

    RNC

    RNS

    RNC

    Core Network

    Node B Node B Node B Node B

    Iu Iu

    Iur

    Iub IubIub Iub

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    Radio Interface Protocol Structure

    L3

    contr

    ol

    co

    ntrol

    co

    ntrol

    contr

    ol

    LogicalChannels

    TransportChannels

    C-plane signaling U-plane information

    PHY

    L2/MAC

    L1

    RLC

    DCNtGC

    L2/RLC

    MAC

    RLCRLC

    RLCRLC

    RLC

    RLCRLC

    Duplication avoidance

    UuS boundary

    BMC L2/BMC

    control

    PDCPPDCP L2/PDCP

    DCNtGC

    RadioBearers

    RRC

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    Data Processing at Physical Layer

    Data from MAC LayerTB

    Channel coding andmultiplexing

    Spreading andmodulation

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    Spreading Technology

    l Spreading consists of 2 steps

    [ Channelization operationwhich transforms data symbols into chips.Thus increasing the bandwidth of the signal, The number of chips per datasymbol is called the Spreading FactorSF.The operation is done bymultiplying with OVSF code.

    [ Scrambling operation is applied to the spreading signal .

    Data bit

    OVSFcode

    Scrambling

    code

    Chips after

    spreading

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    Channelization Code

    l OVSF code is used as channelization code

    l The channelization codes are uniquely described as Cch,SF,k, where SF is

    the spreading factor of the code and k is the code number, 0 k SF-1.

    SF = 1 SF = 2 SF = 4

    Cch,1,0 = (1)

    Cch,2,0 = (1,1)

    Cch,2,1 = (1,-1)

    Cch,4,0 =(1,1,1,1)

    Cch,4,1 = (1,1,-1,-1)

    Cch,4,2 = (1,-1,1,-1)

    Cch,4,3 = (1,-1,-1,1)

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    Scrambling Code

    l Scrambling codeGOLD sequence.

    l Scrambling code period : 10ms ,or 38400 chips.

    l The code used for scrambling of the uplink

    DPCCH/DPDCH may be of either long or short type,There are 224 long and 224 short uplink scrambling

    codes. Uplink scrambling codes are assigned by

    higher layers.

    l For downlink physical channels, a total of 218-1 =

    262,143 scrambling codes can be generated.

    scrambling codes k = 0, 1, , 8191 are used.

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    Scrambling

    codes for

    downlink

    physicalchannels

    Set 0

    Set 1

    Set 511

    Primaryscrambling code 0

    Secondaryscrambling code 1

    Secondaryscrambling code 15

    Primaryscrambling code

    511 16

    Secondaryscrambling code

    511 16 15

    8192 scramblingcodes

    512 sets

    Primary Scrambling Code

    A primary scrambling code and 15 secondary scrambling codes are

    included in a set.

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    Primary Scrambling Code Group

    Primaryscramblingcodes for

    downlinkphysicalchannels

    Group 0

    Primaryscrambling code 0

    Primaryscrambling code

    8*63

    Primaryscrambling code

    63*8 7

    512 primaryscrambling codes

    Group 1

    Group 63

    Primaryscrambling code 1

    Primary scramblingcode 15

    64 primary scramblingcode groups

    Each group consists of 8primary scrambling codes

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    Chapter 1 Physical Layer OverviewChapter 1 Physical Layer Overview

    Chapter 2 Physical layer key technologyChapter 2 Physical layer key technology

    Chapter 3 Physical Layer Processing ProcedureChapter 3 Physical Layer Processing Procedure

    Chapter 4 Physical Layer ProceduresChapter 4 Physical Layer Procedures

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    Chapter 2 Physical layer key technologyChapter 2 Physical layer key technology

    Section 1 Physical ChannelSection 1 Physical Channel

    Structure and FunctionsStructure and Functions

    Section 2 Channel MappingSection 2 Channel Mapping

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