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Chapter 09.Overview of CDMA 2001X

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    E1E1--E2 CME2 CMTECHNICALTECHNICAL

    For internal circulation of BSNL only

    Overview of CDMA 2000 1X & EVDOOverview of CDMA 2000 1X & EVDO

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    AGENDA

    CDMA Network architecture

    Introduction to Network entities

    Interfaces & Protocols

    For internal circulation of BSNL only

    anne ypes unc onsCDMA 2000 1X EVDO

    1X & 1X EVDO comparison

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    CDMA Network Architecture

    MS CA AiBSCBTS Abis

    MS

    Um

    PSTN

    PSPDN

    Pi

    EIR IWFMS C

    F LE

    For internal circulation of BSNL only

    OMC HLR

    C

    AUC H

    Q Q

    D VLR

    B

    VLR

    G

    SC

    N

    SCSM ESME M M M

    ISDN

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    Base Transceiver

    Radio transceiving equipment of a certain cell

    Radio transmission through air interface betweenBTS and MS

    Controlled by BSC

    For internal circulation of BSNL only

    Communication to BSC through the Abis interface

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    Base Station Controller

    Radio network management

    Radio BTS monitoring and management

    Controls handoff

    Carries out operation and maintenance of the BSS.

    For internal circulation of BSNL only

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    Mobile Switching Subsystem

    Implements the main switching functions of the

    CDMA networkManages the database for user data and mobility.

    For internal circulation of BSNL only

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    Mobile Switching Center

    Controls and implements voice channel connection

    for MSs within its coverage areaServing as an interface between CDMA and other

    networks.

    For internal circulation of BSNL only

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    Functions of MSC

    Call connection

    ChargingAssist radio resource management and mobility

    management.

    For internal circulation of BSNL only

    Implements GMSC function for call routeestablishment to the MS

    To query the location information of each MS.

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    MSC databases

    Visitor Location Register

    Home Location RegisterAuthentication Center

    For internal circulation of BSNL only

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    Visitor Location Register

    A dynamic user database

    Stores user data of all MSs (visitors) within the MSCs

    management range

    User ID

    MSs location area information

    For internal circulation of BSNL only

    User statusServices available for the user.

    VLR gets and stores all necessary data from the HLR of

    a mobile subscriber.

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    Home Location Register

    A static database

    Stores the data for mobile subscriber management

    Parameters related with the mobile subscriber

    Subscribers ID

    For internal circulation of BSNL only

    Supplementary services

    Current location information of the subscriber for call

    route establishment.

    ex: Address of MSC or VLR

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    Authentication Center

    Implements MS authentication

    Stores the MS authentication parametersGenerates and sends the corresponding

    authentication parameters according to the requests

    For internal circulation of BSNL only

    of MSC or VLR

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    Short Message Center

    Responsible for receiving, storing and forwarding

    short messagesShort message services include

    Point-to-point

    For internal circulation of BSNL only

    Cell broadcast service.

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    OMC

    Includes OMC-S and OMC-R

    OMC-S is responsible for the maintenance on theMSS side

    OMC-R is responsible for the maintenance on the

    For internal circulation of BSNL only

    BSS side.

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    Interfaces and Protocols

    Air interface

    Um interfaceBetween mobile station and BSS

    A interface - Interface between BSS and MSS

    For internal circulation of BSNL only

    Abis interface -Interface between BSC and BTS

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    MSS internal interfaces

    MSC

    B

    HLR/AUC

    BSS

    D

    BSC

    VLR

    CBTS A

    For internal circulation of BSNL only

    B

    VLR

    MSC

    MC

    E

    N

    Q

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    E interface

    Interface controlling different MSCs of adjacent

    areas.

    Used to exchange handoff information when the MS

    moves during a call

    For internal circulation of BSNL only

    .

    standard digital link between MSCs.

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    CDMA 2000 1x air interface

    Forward Channels

    Reverse Channels

    For internal circulation of BSNL only

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    Forward Channels

    Forward pilot channel (F_PICH)

    Base station uses this channel to transmit the pilot

    signals

    Guide the mobile stations to access the network.

    For internal circulation of BSNL only

    -

    System time and frame synchronization

    information are sent to MS

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    Forward Channels

    Forward paging channel (F-PCH)

    Paging, command and traffic channel allocation

    information

    Forward quick paging channel (F-QPCH)

    Base station uickl instruct MS about time slot to

    For internal circulation of BSNL only

    receive the control message on F-PCH or F-

    CCCH.

    MS need not to monitor F-PCH or F-CCCH time

    slot all the time, so it saves much battery.

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    Forward Channels

    Forward broadcast control channel (F-BCCH)

    For delivering system messages.

    Common assignment channel (F-CACH)

    Base station instructs MS which R-CCCH to use to

    For internal circulation of BSNL only

    And from which F-CPCCH channel to receive

    power control bit.

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    Forward Channels

    Forward common power control channel (F-CPCCH)

    Base station transmits reverse power control bitForward common control channel (F-CCCH)

    To exchange control messages

    For internal circulation of BSNL only

    Used when MS has not set up a traffic channel

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    Forward Channels

    Forward dedicated control channel (F-DCCH)

    Used by base station to transmit messages whenthe mobile station is in traffic channel state

    Forward fundamental traffic channel (F-FCH)

    For internal circulation of BSNL only

    Used to carry signaling, voice, low-rate packet

    service, circuit data services or auxiliary service

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    Forward Channels

    Forward supplemental channel (F-SCH)

    Used to carry high-rate packet data service on theforward link when MS enters traffic channel state.

    Forward supplemental code channel (F-SCCH)

    For internal circulation of BSNL only

    Used for data transfer.Forward power control sub-channel (F-PCSCH)

    Transmits persistently on the forward traffic

    channel.Used for reverse power control.

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    Reverse Channels

    Reverse pilot channel (R_PICH)

    Used to assist the base station to detect the data

    transmitted by MS.

    Reverse access channel (R-ACH)

    -

    For internal circulation of BSNL only

    channel.

    Reverse common control channel (R-CCCH)

    Used by base station and MS

    To exchange control messages when the mobile

    station has not set up a traffic channel yet.

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    Reverse Channels

    Reverse enhanced access channel (R-EACH)

    MS sends control messages to base station whenit has not yet set up a traffic channel

    Reverse dedicated control channel (R-DCCH)

    For internal circulation of BSNL only

    Used to transmit messages when the mobilestation is in traffic channel state

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    Reverse Channels

    Reverse fundamental channel (R-FCH)

    Used to carry signaling, voice, low-rate packet andcircuit data services, or auxiliary services on the

    reverse link when the mobile station enters traffic

    For internal circulation of BSNL only

    channel state.

    Reverse supplemental channel (R-SCH)

    Used to carry high-rate packet data service

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    Reverse Channels

    Reverse supplemental code channel

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