02-OWA210001 WCDMA UTRAN Interface and Signaling Procedure ISSUE 1.1

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    www.huawei.com

    Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    WCDMA UTRANInterface and

    SignalingProcedure

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    Page2Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Objectives

    Upon completion of this course, you will be able to:

    Understand UTRAN interface and structure

    Understand the definitions about UTRAN network

    elements

    Understand UTRAN signaling procedure

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    Page3Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    1. UTRAN Network Overview

    2. Basic Concepts about UTRAN

    3. UTRAN Signaling Procedure

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    Page4Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Contents

    1. UTRAN Network Overview

    2. Basic Concepts about UTRAN

    3. UTRAN Signaling Procedure

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    Page5Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    The Position of UTRAN inWCDMA Network

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    Page6Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    UMTS Construction

    UTRANUTRAN UMTS Terrestrial Radio Access NetworkUMTS Terrestrial Radio Access NetworkCNCN Core NetworkCore NetworkUEUE User EquipmentUser Equipment

    Iu

    UTRAN

    UE

    Uu

    CN

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    UMTS 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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    Uu Interface

    L3

    c o n

    t r o

    l

    c o n

    t r o

    l

    c o n

    t r o

    l

    LogicalChannels

    TransportChannels

    C-plane signalling U-plane information

    PHY

    L2/MAC

    L1

    RLC

    DCNtGC

    L2/RLC

    MAC

    RLCRLCRLC

    RLC

    RLCRLC

    RLC

    Duplication avoidance

    UuS boundary

    BMC L2/BMC

    control

    PDCPPDCP L2/PDCP

    DCNtGC

    RadioBearers

    RRC

    c o n

    t r o

    l

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    General Protocol Mode for UTRAN Terrestrial Interface

    The structure is based on the principle that the layersand planes are logically independent of each other.

    ApplicationProtocol DataStream(s)

    ALCAP(s)

    TransportNetwork

    Layer

    Physical Layer

    SignallingBearer(s)

    TransportUser

    NetworkPlane

    Control Plane User Plane

    TransportUser

    NetworkPlane

    Transport NetworkControl Plane

    RadioNetwork

    Layer

    SignallingBearer(s)

    DataBearer(s)

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    General Protocol Mode for UTRAN Terrestrial Interface

    The structure is based on the principle that the layersand planes are logically independent of each other.

    ApplicationProtocol

    DataStream(s)

    ALCAP(s)

    TransportNetwork

    Layer

    Physical Layer

    SignallingBearer(s)

    TransportUser

    NetworkPlane

    Control Plane User Plane

    TransportUser

    NetworkPlane

    Transport NetworkControl Plane

    RadioNetwork

    Layer

    SignallingBearer(s)

    DataBearer(s)

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    Page13Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    RNL Control Plane ApplicationProtocol

    NBAP Node B Application PartRANAP Radio Access Network Application PartRNSAP Radio Network Subsystem Application PartRRC Radio Resource Control

    Node B

    RNC

    CN

    UE

    RANAP

    NBAP

    RNSAP RRC RNC

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    Page14Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Iu-CS Interface

    Q.2150.1

    Q.2630.1

    RANAPIu UP Protocol

    Layer

    TransportNetwork

    Layer

    Transport NetworkUser Plane

    Control Plane User Plane

    Transport NetworkUser Plane

    Transport NetworkControl Plane

    RadioNetwork

    Layer

    SSCOP

    AAL5

    SSCOP

    SSCF-NNI

    AAL2AAL5

    MTP3bMTP3b

    SCCP

    SSCF-NNI

    Physical Layer

    ATM

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    Page15Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Iu-PS Interface

    SSCF-NNI

    SSCOP

    AAL5

    IP

    SCTP

    SCCP

    SSCF-NNI

    MTP3-BM3UA

    Physical Layer

    Control Plane User Plane

    ATM

    AAL5

    IP

    UDP

    GTP-U

    Physical Layer

    ATM

    TransportNetwork

    Layer

    Transport NetworkControl Plane

    RadioNetwork

    Layer RANAP Iu UP Protocol

    Layer

    Transport NetworkUser Plane

    Transport NetworkUser Plane

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    Page16Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Iub Interface

    Node BApplication Part

    (NBAP)

    AAL Type 2

    ALCAP

    TransportLayer

    RadioNetwork

    Layer

    Radio NetworkControl Plane

    TransportNetwork

    Control Plane

    DCH FP

    RACH FP

    ATM

    DSCH FP

    AAL Type 5

    User Plane

    SSCF-UNI

    SSCOP

    AAL Type 5

    SSCF-UNI

    SSCOP

    Q.2630.1

    Q.2150.2

    FACH FP

    PCH FP

    USCH FP

    CPCH FP

    Physical Layer

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    Page17Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Iur Interface

    SSCF-NNI

    SSCOP

    MTP3-B

    AAL5

    IP

    SCTP

    SCCP

    AAL5

    STC (Q.2150.1)

    RNSAPIur Data

    Stream(s)

    Physical Layer

    Control Plane User Plane

    ATM

    ALCAP(Q.2630.1)

    AAL2

    SSCF-NNI

    SSCOP

    MTP3-B

    IP

    SCTP

    M3UAM3UA

    TransportNetwork

    Layer

    Transport NetworkControl Plane

    Radio

    NetworkLayer

    Transport NetworkUser Plane

    Transport NetworkUser Plane

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    Page19Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    SRNC/DRNC

    SRNC and DRNC are on a per connection basis between a UE and the UTRAN

    The SRNC handles the connection to one UE, and may borrow radio resources of a certain cell

    from the DRNC

    Drift RNCs support the Serving RNC by providing radio resources

    A UE in connection state has at least one and only one SRNC, but can has 0 or multiple DRNCs

    CN

    SRNC DRNC

    IuIur

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    Page21Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    RAB, RB and RL

    RAB

    RB

    RLNodeB

    RNC CNUE

    UTRAN

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    Page22Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    UE Working Modes and States

    Idle mode

    Connected mode

    Cell_DCH

    Cell_FACH

    Cell_PCH

    URA_PCH

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    Page23Copyright 2008 Huawei Technologies Co., Ltd. All rights reserved.

    Idle Mode The UE has no relation to UTRAN, only to CN. For data transfer, asignalling connection has to be established.

    UE camps on a cell

    It enables the UE to receive system information from the PLMN

    When registered and if the UE wishes to establish an RRC connection, it can do

    this by initially accessing the network on the control channel of the cell onwhich it is camped

    UE can receive "paging" message from control channels of the cell.

    It enables the UE to receive cell broadcast services.

    The idle mode tasks can be subdivided into three processes:

    PLMN selection and reselection;

    Cell selection and reselection;

    Location registration.

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