07-WCDMA UTRAN Signaling

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Transcript of 07-WCDMA UTRAN Signaling

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    Huawei Confidential. All Rights Reserved

    UMTS UTRAN Signaling Procedures

    ISSUE 1.0

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    Internal Use 1

    Object

    Upon completion this course, youwill be able to:

    Understand UTRAN Interface andstructureUnderstand the definitions aboutUTRAN network elementsUnderstand UTRAN signaling

    procedure

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    Internal Use 2

    Chapter 1 UTRAN Network Overview

    Chapter 2 Basic Concepts about UTRAN

    Chapter 3 UTRAN Signaling Procedure

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    Internal Use 3

    The Position of UTRAN in WCDMA Network

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    Internal Use 4

    UMTS Construction

    Iu

    UTRAN

    UE

    Uu

    CN

    UTRAN UMTS Terrestrial Radio Access Network

    CN Core NetworkUE User Equipment

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    Internal Use 5

    UMTS Structure

    RNS

    RNC

    RNS

    RNC

    Core Network

    Node B Node B Node B Node B

    Iu Iu

    Iur

    Iub Iub Iub 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

    c o n t r o

    l

    LogicalChannels

    TransportChannels

    C-plane signalling U-plane information

    PHY

    L2/MAC

    L1

    RLC

    DC NtGC

    L2/RLC

    MAC

    RLCRLC

    RLCRLC

    RLCRLC

    RLC

    Duplication avoidance

    UuS boundary

    BMC L2/BMC

    control

    PDCPPDCP L2/PDCP

    DC NtGC

    RadioBearers

    RRC

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    Iu-CS Interface

    Q.2150.1

    Q.2630.1

    RANAP Iu UP ProtocolLayer

    Transport Network

    Layer

    Physical Layer

    TransportUser

    etwork Plane

    Control Plane User Plane

    TransportUser

    etwork Plane

    Transport Network Control Plane

    Radio Network

    Layer

    ATM

    SSCOP

    AAL5

    SSCOP

    SSCF-NNI

    AAL2AAL5

    MTP3bMTP3b

    SCCP

    SSCF-NNI

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    Iu-PS Interface

    SSCF-NNI

    SSCOP

    AAL5

    IP

    SCTP

    SCCP

    SSCF-NNI

    MTP3-BM3UA

    RANAP Iu UP ProtocolLayer

    Transport Network

    Layer

    Physical Layer

    TransportUser

    Network Plane

    Control Plane User Plane

    TransportUser

    Network Plane

    Transport Network Control Plane

    Radio Network

    Layer

    ATM

    AAL5

    IP

    UDP

    GTP-U

    Physical Layer

    ATM

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    Iub Interface

    Node BApplication Part

    (NBAP)

    AAL Type 2

    ALCAP

    Transport

    Layer

    Physical Layer

    Radio Network Layer

    Radio Network Control Plane

    Transport Network

    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

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    Iur Interface

    SSCF-NNI

    SSCOP

    MTP3-B

    AAL5

    IP

    SCTP

    SCCP

    AAL5

    SSCF-NNI

    STC (Q.2150.1)

    RNSAP Iur DataStream(s)

    TransportNetwork

    Layer

    Physical Layer

    TransportUser

    NetworkPlane

    Control Plane User Plane

    TransportUser

    NetworkPlane

    Transport NetworkControl Plane

    RadioNetwork

    Layer

    ATM

    ALCAP(Q.2630.1)

    AAL2

    SSCF-NNI

    SSCOP

    MTP3-B

    IP

    SCTPSSCF-NNI

    M3UA M3UA

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    Question

    What kind of Interfaces are there in UTRAN ?

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    Chapter 1 UTRAN Network Overview

    Chapter 2 Basic Concepts about UTRAN

    Chapter 3 UTRAN Signaling Procedure

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    RAB, RB and RL

    RAB The service that the access stratum

    provides to the non-access stratum for transfer of

    user data between User Equipment and CN

    RB The service provided by the layer2 for

    transfer of user data between User Equipment

    and Serving RNC

    RL A "radio link" is a logical association between

    single User Equipment and a single UTRAN accesspoint. Its physical realization comprises one or

    more radio bearer transmissions

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    RAB, RB and RL

    RAB

    RB

    RLNodeB

    RNCCN

    UE

    UTRAN

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    TE MT UTRAN CN IuEDGENODE

    CNGateway

    TE

    UMTS

    UTRAFDD/TDD

    Service

    PhysicalBearerService

    RadioBearerService

    IuBearerService

    BackboneNetworkService

    Radio Access BearerService

    CN BearerService

    UMTS BearerService

    TE/MTLocal BearerService

    ExternalBearerService

    End-to-EndService

    UTRANradio interface

    UMTS Qos Mapping

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    UMTS Qos Mapping

    During RAB assignment request in Iu interface, it contains theQos in formations which are required by UMTS service.

    RAB Service: Providing the stable Qos service Between UEand CN. For RAB service, the character of access stratum istransparent.

    RB service: In access stratum, RB service makes sure the

    Qos is stable by different kinds of protecting methods.

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    UE Working Modes and states

    Idle modeConnected mode

    Cell_DCHCell_FACHCell_PCH

    URA_PCH

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    UE Working Modes and states

    Idle ModeThe UE has no relation to UTRAN, only to CN. For data transfer, a

    signalling connection has to be established.UE camps on a cell

    It enables the UE to receive system information from the PLMNWhen registered and if the UE wishes to establish an RRCconnection, it can do this by initially accessing the network on the

    control channel of the cell on which it is campedUE 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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    UE Working Modes and states

    Connected Mode (Cell-DCH, Cell-FACH, Cell-PCH,URA-PCH)

    When at least one signalling connection exists, the UE is inconnected mode and there is normally an RRC connectionbetween UE and UTRAN. The UE position can be known ondifferent levels:

    UTRAN Registration Area (URA) levelThe UE position is known on URA level. The URA is a set ofcellsCell levelThe UE position is known on cell level. Different transportchannel types can be used for data transfer:

    Common transport channels (RACH / FACH, DSCH, CPCH)Dedicated transport Channels (DCH)

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    UE Working Modes and states

    Cell-DCHIn active stateCommunicating via its dedicated channelsUTRAN knows which cell UE is in.

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    Cell-FACH and Cell-PCH State

    Cell-FACHIn active state

    Few data to be transmitted both in uplink and in downlink.There is no need to allocate dedicated channel for this UE.Downlink uses FACH and uplink uses RACH.UE need to monitor the FACH for its relative information.UTRAN knows which cell UE is in.

    Cell-PCHNo data to be transmitted or received.Monitor PICH, to receive its paging.lower the power consumption of UE.UTRAN knows which cell UE is in.UTRAN have to update cell information of UE when UE roamsto another cell

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    URA-PCH State

    URA-PCH

    No data to be transmitted or received.Monitor PICH.UTRAN only knows which URA (UTRAN Registration

    Area, which consists of multiple cells) that UE is in.UTRAN update UE information only after UE has roamedto other URA.

    A better way to lower the resource occupancy andsignaling transmission

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    Internal Use 23

    UE states

    CELL_DCH CELL_FACH

    CELL_PCHURA_PCH

    IDLE

    DEAD - Scanning networks (PLMN)- Camp on cell

    - Monitor paging channel

    - cell re-selection

    - Dedicated Channel- Radio bearers Transmission Services - upper layer Signaling