03- OWA210001 WCDMA UTRAN Interface and Signaling Procedure

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Transcript of 03- OWA210001 WCDMA UTRAN Interface and Signaling Procedure

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    HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

    www.huawei.com

    OWA210001 WCDMA

    UTRAN Interface and

    Signaling Procedure

    ISSUE 1.0

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    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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    Chapter 1 UTRAN Network Overview

    Chapter 2 Basic Concepts about UTRAN

    Chapter 3 UTRAN Signaling Procedure

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    The Position of UTRAN in WCDMA Network

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    UMTS Construction

    UTRAN UMTS Terrestrial Radio Access Network

    CN Core Network

    UE User Equipment

    Iu

    UTRAN

    UEUu

    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

    control

    control

    control

    Logical

    Channels

    Transport

    Channels

    C-plane signalling U-plane information

    PHY

    L2/MAC

    L1

    RLC

    DCNtGC

    L2/RLC

    MAC

    RLCRLC

    RLC

    RLC

    RLCRLC

    RLC

    Duplication avoidance

    UuS boundary

    BMC L2/BMC

    control

    PDCPPDCP L2/PDCP

    DCNtGC

    Radio

    Bearers

    RRC

    control

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    General Protocol Mode for UTRAN Terrestrial Interface

    The structure is based on the principle that the layers and 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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    RNL Control Plane Application Protocol

    NBAPNode B Application PartRANAPRadio Access Network Application Part

    RNSAPRadio Network Subsystem Application Part

    RRC Radio Resource Control

    Node B

    RNC

    CN

    UE

    RANAP

    NBAP

    RNSAPRRCRNC

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    Iu-CS Interface

    Q.2150.1

    Q.2630.1

    RANAPIu UP Protocol

    Layer

    Transport

    Network

    Layer

    Transport Network

    User Plane

    Control Plane User Plane

    Transport Network

    User PlaneTransport Network

    Control Plane

    Radio

    Network

    Layer

    SSCOP

    AAL5

    SSCOP

    SSCF-NNI

    AAL2AAL5

    MTP3bMTP3b

    SCCP

    SSCF-NNI

    Physical Layer

    ATM

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    Iu-PS Interface

    SSCF-NNI

    SSCOP

    AAL5

    IP

    SCTP

    SCCP

    SSCF-NNI

    MTP3-B

    M3UA

    Physical Layer

    Control Plane User Plane

    ATM

    AAL5

    IP

    UDP

    GTP-U

    Physical Layer

    ATM

    Transport

    Network

    Layer

    Transport Network

    Control Plane

    Radio

    Network

    Layer

    RANAP Iu UP ProtocolLayer

    Transport Network

    User Plane

    Transport Network

    User Plane

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    Iub Interface

    Node B

    Application Part

    (NBAP)

    AAL Type 2

    ALCAP

    Transport

    Layer

    Radio

    Network

    Layer

    Radio Network

    Control Plane

    Transport

    Network

    Control Plane

    DCHFP

    RACHFP

    ATM

    DSCHFP

    AAL Type 5

    User Plane

    SSCF-UNI

    SSCOP

    AAL Type 5

    SSCF-UNI

    SSCOP

    Q.2630.1

    Q.2150.2

    FACHFP

    PCHFP

    USCHFP

    CPCHFP

    Physical Layer

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    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

    Transport

    Network

    Layer

    Transport Network

    Control Plane

    Radio

    NetworkLayer

    Transport Network

    User Plane

    Transport Network

    User Plane

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    Chapter 1 UTRAN Network Overview

    Chapter 2 Basic Concepts about UTRAN

    Chapter 3 UTRAN Signaling Procedure

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    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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    CRNC

    The CRNC owns the radio resources of a cell

    Dynamical control of power for dedicated channels, within limits

    admitted by CRNC, is done by the SRNC.

    Scheduling of data for dedicated channels is done by the SRNC,

    while for common channels it is done by the CRNC

    Iub

    Node B

    Cell Cell Cell

    Node B

    ...

    Iu

    CRNC

    CN

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    RAB, RB and RL

    RAB

    RB

    RLNodeB

    RNC CNUE

    UTRAN

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    UE Working Modes and States

    Idle mode

    Connected mode

    Cell_DCH

    Cell_FACH

    Cell_PCH

    URA_PCH

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    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 ofthe cell on which 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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    Connected Mode

    When at least one signalling connection exists, the UE is in connected

    mode and there is normally an RRC connection between UE and UTRAN.

    The UE position can be known on different levels:

    UTRAN Registration Area (URA) level

    The UE position is known on URA level. The URA is a set of cells

    Cell level

    The UE position is known on cell level. Different transport channel

    types can be used for data transfer:

    Common transport channels (RACH / FACH, DSCH, CPCH)

    Dedicated transport channels (DCH)

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    Cell-DCH

    In active state

    Communicating via its ded