UMTS UTRAN Call Flow

Click here to load reader

  • date post

    06-May-2015
  • Category

    Technology

  • view

    1.522
  • download

    36

Embed Size (px)

description

It discusses about the 3G call flow scenarios for both the Circuit Switched (CS) and Packet Switched (PS). Calls are mobile originated. Call making and call tear down both are discussed.

Transcript of UMTS UTRAN Call Flow

  • 1.UMTS Call Flow Scenarios An Overview of Circuit and Packet Call Flow Scenarios

2. UTRAN INTERFACES MSC SGSN RNC RNC Node BNode B UE Iu-psIu-cs Iu-r Iu-b Uu Iu-b Cell 3. BASIC CALL SETUP PURPOSE To provision a dedicated traffic channel and a dedicated control channel over every interface applicable for the call from the core network to the UE To Synchronise the transmissions across the network To provide security to the end user 4. PART 1 Node B Initialization and Cell Camp on 5. PART 1 - NODE B INITIALISATION Procedure Overview1.1) Audit Procedure: Audit Required Indication Message1.1) Audit Procedure: Audit Required Indication Message Type: NBAP Purpose: After the SSCOP layer is established via the exchange of BGN/BGAK PDUs, the Node B tells RNC that it has one or more cells that need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Type: NBAP Purpose: After the SSCOP layer is established via the exchange of BGN/BGAK PDUs, the Node B tells RNC that it has one or more cells that need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Audit Required Indication UEUE Node B Node B RNCRNC MSCMSC [1] 6. PART 1 - NODE B INITIALISATION Procedure Overview1.2) Audit Procedure: Audit Request Message1.2) Audit Procedure: Audit Request Message Type: NBAP Purpose: RNC requests an Audit of the Node B configuration. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Type: NBAP Purpose: RNC requests an Audit of the Node B configuration. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Audit Request UEUE Node B Node B RNCRNC MSCMSC Audit Required Indication [1] 7. PART 1 - NODE B INITIALISATION Procedure Overview1.3) Audit Procedure: Audit Response Message1.3) Audit Procedure: Audit Response Message Type: NBAP Purpose: Node B informs the RNC of its Cell and Channel Configuration Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Node B Capacity Cell IDs Channel Information... Type: NBAP Purpose: Node B informs the RNC of its Cell and Channel Configuration Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Node B Capacity Cell IDs Channel Information... Audit Response UEUE Node B Node B RNCRNC MSCMSC Audit Request Audit Required Indication [1] 8. PART 1 - NODE B INITIALISATION Procedure Overview1.4) Cell Set-up Procedure: Resource Status Indication1.4) Cell Set-up Procedure: Resource Status Indication Type: NBAP Purpose: Node B informs the RNC that it has added a cell(s) and that it (they) need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID No Failure Local Cell Added Type: NBAP Purpose: Node B informs the RNC that it has added a cell(s) and that it (they) need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID No Failure Local Cell Added Resource Status Indication UEUE Node B Node B RNCRNC MSCMSC Audit Request Procedure [1] 9. PART 1 - NODE B INITIALISATION Procedure Overview1.5) Cell Set-up Procedure: Cell Set-up Request1.5) Cell Set-up Procedure: Cell Set-up Request Type: NBAP Purpose: Node B informs the RNC that it has added a cell(s) and that it (they) need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Cell & Local Cell ID Scrambling Codes Sync and Power Info Type: NBAP Purpose: Node B informs the RNC that it has added a cell(s) and that it (they) need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Cell & Local Cell ID Scrambling Codes Sync and Power Info Cell Setup Request UEUE Node B Node B RNCRNC MSCMSC Resource Status Indication [1] Audit Request Procedure 10. PART 1 - NODE B INITIALISATION Procedure Overview1.6) Cell Set-up Procedure: Cell Set-up Response1.6) Cell Set-up Procedure: Cell Set-up Response Type: NBAP Purpose: Node B informs the RNC that it has added a cell(s) and that it (they) need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Cell Setup Success Type: NBAP Purpose: Node B informs the RNC that it has added a cell(s) and that it (they) need to be configured. Channels: SSCF/SSCOP/AAL5 Main IEs: Transaction ID Cell Setup Success UEUE Node B Node B RNCRNC MSCMSC Cell Set-Up Response Cell Setup Request Resource Status Indication [1] Audit Request Procedure 11. PART 1 - NODE B INITIALISATION Procedure Overview1.7) Cell Set-up Procedure: Block Resource Request1.7) Cell Set-up Procedure: Block Resource Request Type: NBAP Purpose: Node B requests that the RNC should list this new cell(s) as blocked until System Info (MIB & SIBs) can be updated and broadcast on BCH. Channels: SSCF/SSCOP/AAL5 Main IEs: Trans & Cell ID Priority Indicator (high) Type: NBAP Purpose: Node B requests that the RNC should list this new cell(s) as blocked until System Info (MIB & SIBs) can be updated and broadcast on BCH. Channels: SSCF/SSCOP/AAL5 Main IEs: Trans & Cell ID Priority Indicator (high) UEUE Node B Node B RNCRNC MSCMSC Cell Set-Up Response Cell Setup Request Resource Status Indication Block Resource Request [1] Audit Request Procedure 12. PART 1 - NODE B INITIALISATION Procedure Overview1.8) Cell Set-up Procedure: Block Resource Response1.8) Cell Set-up Procedure: Block Resource Response Type: NBAP Purpose: RNC confirms that the cell(s) are blocked. For this example, this is a new Node B so all the cells will be blocked. Channels: SSCF/SSCOP/AAL5 Main IEs: Trans & Cell ID Type: NBAP Purpose: RNC confirms that the cell(s) are blocked. For this example, this is a new Node B so all the cells will be blocked. Channels: SSCF/SSCOP/AAL5 Main IEs: Trans & Cell ID UEUE Node B Node B RNCRNC MSCMSC Cell Set-Up Response Cell Setup Request Resource Status Indication Block Resource Request Block Resource Response [1] Audit Request Procedure 13. PART 1 - NODE B INITIALISATION Procedure Overview 1.9) System Information Broadcast Procedure: System Information Update Request and Response 1.9) System Information Broadcast Procedure: System Information Update Request and Response Type: NBAP Purpose: RNC updates the System Information by sending a series of Sys. Info. Update Request messages which are ackd by the Node B. SIB blocks are segmented into 246 bit blocks, which are sent (and ackd) sequentially. Main IEs: MIB/SIB info Segment Info Type: NBAP Purpose: RNC updates the System Information by sending a series of Sys. Info. Update Request messages which are ackd by the Node B. SIB blocks are segmented into 246 bit blocks, which are sent (and ackd) sequentially. Main IEs: MIB/SIB info Segment Info System Info Update Req. Segment 1 System Info Update Resp. Segment 1 UEUE Node B Node B RNCRNC MSCMSC Cell Setup Procedure System Info Update Req. Segment 2 System Info Update Resp. Segment 2 System Info Update Req. Segment 3 System Info Update Resp. Segment 3 . . etc [1] [2] [3] [4] [5] [6] Audit Request Procedure 14. PART 1 - NODE B INITIALISATION Procedure Overview 1.10) System Information Broadcast Procedure: System Information is Broadcast for each cell 1.10) System Information Broadcast Procedure: System Information is Broadcast for each cell Type: BCH over P-CCPCH Purpose: The Node B has received and stored the System Info for each cell (from the RNC) and now broadcasts it throughout the cell. Transport Format (BCH): TB size: 246 bits TTI: 20 ms Conv. Encoding: 1/2 rate 16 bit CRC Type: BCH over P-CCPCH Purpose: The Node B has received and stored the System Info for each cell (from the RNC) and now broadcasts it throughout the cell. Transport Format (BCH): TB size: 246 bits TTI: 20 ms Conv. Encoding: 1/2 rate 16 bit CRC BCH: System Info BCH: System Info UEUE Node B Node B RNCRNC MSCMSC BCH: System Info Cell Setup Procedure System Info Update Resp. Segment 1 System Info Update Req. Segment 2 System Info Update Resp. Segment 2 System Info Update Req. Segment 3 System Info Update Resp. Segment 3 . . etc System Info Update Req. Segment 1 [1] [2] [3] Audit Request Procedure 15. PART 1 - NODE B INITIALISATION Procedure Overview 1.11) Common Transport Channel Set-up Procedure: Common Transport Channel Set-up Request (PRACH, AICH, RACH) 1.11) Common Transport Channel Set-up Procedure: Common Transport Channel Set-up Request (PRACH, AICH, RACH) Type: NBAP Purpose: Common Transport Channels are set up in two parts. First, the PRACH, AICH, and RACH are configured along with the AAL2 Connection for the RACH Transport Channel. Main IEs: RACH info (TF Set) AICH info (Codes, SF, etc) PRACH (TFCS, SF, etc) Type: NBAP Purpose: Common Transport Channels are set up in two parts. First, the PRACH, AICH, and RACH are configured along with the AAL2 Connection for the RACH Transport Channel. Main IEs: RACH info (TF Set) AICH info (Codes, SF, etc) PRACH (TFCS, SF, etc) UEUE Node B Node B RNCRNC MSCMSC System Information Update Common Transport CH Set-Up Request Cell Setup Procedure Audit Request Procedure [1] 16. PART 1 - NODE B INITIALISATION Procedure Overview 1.12) Common Transport Channel Set-up Procedure: Common Transport Channel Set-up Response (PRACH, AICH, RACH) 1.12) Common Transport Channel Set-up Procedure: Common Transport Channel Set-up Response (PRACH, AICH, RACH) Type: NBAP Purpose: The Node B Acks the 1st Com Trans Setup msg which established the PRACH, AICH, & RACH/ Main IEs: for RACH Binding and Com ID Transport layer address Type: NBAP Purpose: The Node B Acks the 1st Com Trans Setup msg which established the PRACH, AICH, & RACH/ Main IEs: for RACH Binding and Com ID Transport layer address UEUE Node B Node B RNCRNC MSCMSC Common Transport CH Set-Up Response Common Transport CH Set-Up Request System Information Update Cell Setup Procedure Audit Request Procedure [1] 17. PART 1 - NODE B INITIALISATION Procedure Overview 1.13) Common Transport Channel Set-up Procedure: ALCAP Establish Request (with Binding ID for RACH) 1.13) Common Transport Channel Set-up Procedure: ALCAP Establish Request (with Binding ID for RACH) Type: ALCAP Purpose: This message request the establishment o