3G/UMTS-TDSCDMA

 

 

 

 

Redirection to GSM

 

    (1) UE <--> NW : Registration (Combined or Non-Combined)

    (2) UE <--> NW : < IDLE >

    (3) UE  : < Make a MO Packet Call >

    (4) UE --> NW : RRC CONNECTION REQUEST

    (5) UE <-- NW : RRC CONNECTION SETUP

    (6) UE --> NW : RRC CONNECTION SETUP COMPLETE

    (7) UE --> NW : GMM SERVICE REQUEST

    (8) UE <-- NW : AUTHENTICATION AND CIPHERING REQUEST

    (9) UE --> NW : AUTHENTICATION AND CIPHERING RESPONSE

    (10) UE <-- NW : SECURITY MODE COMMAND

    (11) UE --> NW : SECURITY MODE COMPLETE

    (12) UE --> NW : ACTIVATE PDP CONTEXT REQUEST

    (13) UE <-- NW : RADIO BEARER SETUP

    (14) UE --> NW : RADIO BEARER SETUP COMPLETE

    (15) UE <-- NW : ACTIVATE PDP CONTEXT ACCEPT

    (16) UE <--> NW : < User Data Flow >

    (17) NW : Trigger for Redirection

    (18) UE <-- NW : RRC CONNECTION RELEASE

    (19) UE --> NW : RRC CONNECTION RELEASE COMPLETE

    (20) UE --> NW : RRC CONNECTION RELEASE COMPLETE

    (21) UE --> NW : RRC CONNECTION RELEASE COMPLETE

    (22) UE --> NW : CHANNEL REQUEST/HANDOVER ACCESS

    (23) UE <-- NW : IMMEDIATE ASSIGNMENT

    (24) UE --> NW : ROUTING AREA UPDATE REQUEST

    (25) UE <-- NW : AUTHENTICATION AND CIPHERING REQUEST

    (26) UE --> NW : AUTHENTICATION AND CIPHERING RESPONSE

    (27) UE <-- NW : IDENTITY REQUEST

    (28) UE --> NW : IDENTITY RESPONSE

    (29) UE <-- NW : ROUTING AREA UPDATE ACCEPT

    (30) UE <-- NW : ROUTING AREA UPDATE COMPLETE

 

RRC Connection Release

 

  +-message ::= CHOICE [rrcConnectionRelease]

    +-rrcConnectionRelease ::= CHOICE [later-than-r3]

      +-later-than-r3 ::= SEQUENCE

        +-rrc-TransactionIdentifier ::= INTEGER (0..3) [0]

        +-criticalExtensions ::= CHOICE [r4]

          +-r4 ::= SEQUENCE [1]

            +-rrcConnectionRelease-r4 ::= SEQUENCE [10]

            | +-n-308 ::= INTEGER (1..8) [2] OPTIONAL:Exist

            | +-releaseCause ::= ENUMERATED [normalEvent]

            | +-rplmn-information ::= SEQUENCE OPTIONAL:Omit

            +-v4d0NonCriticalExtensions ::= SEQUENCE [01] OPTIONAL:Exist

              +-rrcConnectionRelease-r4-add-ext ::= BIT STRING OPTIONAL:Omit

              +-v690NonCriticalExtensions ::= SEQUENCE [0] OPTIONAL:Exist

                +-rrcConnectionRelease-v690ext ::= SEQUENCE [1]

                | +-redirectionInfo-v690ext ::= CHOICE [interRATInfo] OPTIONAL:Exist

                |   +-interRATInfo ::= SEQUENCE [1]

                |     +-rat ::= ENUMERATED [gsm]

                |     +-gsm-TargetCellInfoList ::= [1] OPTIONAL:Exist

                |       +-GSM-TargetCellInfo ::= SEQUENCE [1]

                |         +-bcch-ARFCN ::= INTEGER (0..1023) [20]

                |         +-frequency-band ::= ENUMERATED [dcs1800BandUsed]

                |         +-bsic ::= SEQUENCE OPTIONAL:Exist

                |           +-ncc ::= INTEGER (0..7) [1]

                |           +-bcc ::= INTEGER (0..7) [5]

                +-v770NonCriticalExtensions ::= SEQUENCE OPTIONAL:Omit