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Umts utran call flow cs and ps

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  • 1. UMTS Call Flow Scenarios An Overview of Circuit and Packet Call Flow Scenarios V1.2

2. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 2 (164) INTRODUCTION & ACKNOWLEDGEMENTS Introduction. Acknowledgements: Kuldeep Kaushik, authors of the original presentation FirstCallFlow (formed basis of this slide pack). My sincere thanks to all who gives there valuable support and reviews to make this document better. 3. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 3 (164) ADVISORY The aim is to provide a broad understanding of the Call Flow Scenarios needed for Call Setup / Teardown The scenarios outlined are not definitive, some parts of the individual procedures have been cut back or omitted for simplicity. Scenarios are outlined for both R99 Circuit and Packet calls, from Network Initialisation through to call set-up and tear-down. 4. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 4 (164) SUMMARY OF PRESENTATION UEUE Node B Node B RNCRNC CNCN Node B Initialisation and System Information Broadcast Procedure UE Initiated CS Call Setup Procedure UE Camp on and Location Update Procedure UE Initiated CS Call Tear Down Procedure UE Initiated PS Call Setup Procedure UE Initiated PS Call Tear Down Procedure Part 1 Part 2 Part 3 Part 4 Part 5 Part 6 5. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 5 (164) OBLIGATORY STUFF UTRAN INTERFACES MSC SGSN S-RNC Node B UE Iu-psIu-cs Uu Iu-b Cell No Handover single RL 6. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 6 (164) OBLIGATORY STUFF UTRAN INTERFACES MSC SGSN S-RNC Node B UE Iu-psIu-cs Cell Uu Iu-b Intra-NodeB Softer Handover 7. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 7 (164) OBLIGATORY STUFF UTRAN INTERFACES MSC SGSN S-RNC Node B Node B UE Iu-psIu-cs Uu Iu-b Intra-RNC Soft Handover Iu-b Cell 8. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 8 (164) OBLIGATORY STUFF UTRAN INTERFACES MSC SGSN S-RNC D-RNC Node BNode B UE Iu-psIu-cs Iu-r Iu-b Uu Iu-b Cell Inter-RNC Soft Handover 9. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 9 (164) 3GMSC 3GMSC RNC RNC Node B Node B AA MM SM MAC Phy-up PHY codec RRC RLC MM CM MAC Phy-up PHY RRC MTP AAL5 SSCF Iu UPQ2150.1 ATM E1 AAL2 SSCOP MTP3B AAL5 SSCF SCCP SM MM RANAP Iu UPSTC.1 ALCAP STM-1 AAL2 SSCOP MTP3B AAL5 SSCF-NNI SCCP MM CM ATM E1 FP AAL2 STC.2 SSCOP NBAP AAL5 SSCF-UNI PHY ALCAP Uu Iub Iucs SSCOP NBAP AAL5 SSCOP ALCAP AAL5 SSCF SSCF FP AAL2 AAL2 RLC MAC Phy-up RRC ATM E1 NBAP AAL5 SSCOP MTP3-b SSCF-NNI SCCP RANAP ATM STM-1 ALCAP STC.2 SSCF-UNI SSCOP Iu UP MAC Phy-up FP AAL5 codec RRC RLC AAL2 ALCAP STC.1 ATM codec RLC Control Plane User Plane Transport Plane CommonControl Plane User Plane Transport Plane Common OBLIGATORY STUFF UE / CS CN PROTOCOL STACK 10. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 10 (164) Q2150.1 SGSN SGSN RNC RNC Node B Node B Control Plane User Plane Transport Plane CommonControl Plane User Plane Transport Plane Common MM SM MAC Phy-up PHY codec RRC RLC PMM SM MAC Phy-up PHY RRC IP PDCP RLC SSCOP NBAP AAL5 SSCOP ALCAP AAL5 SSCF SSCF FP AAL2 AAL2 AAL5 AAL5 SSCF RLC MAC Phy-up SCCP FP RRC ATM E1 NBAP AAL5 AAL2 SSCOP MTP3-b SSCF-N SCCP RANAP RRC ATM STM-1 GTP-U UDP PDCP ALCAP STC.2 SSCF-UNI SSCOP IP RLC MAC Phy-up FP AAL5 ATM E1 FP AAL2 SSCOP ALCAP AAL5 SSCOP NBAP AAL5 SSCF SSCF PHY ATM E1/ STM-1 AAL2 AAL5 NBAP PHY ALCAP SSCOP STC.2 SSCF-UNIFP SSCOP MTP3B AAL5 SSCF Q2150.1 Q2150.1 Iu UP ATM E1 AAL2 SSCOP MTP3B AAL5 SSCF SCCP SM MM RANAP SSCOP MTP3-b SSCF-N SCCP PMM SM ATM STM-1 AAL5 IP GTP-U GTP-C UDP L1 L2 SSCOP MTP3B AAL5 SSCF Q2150. 1 Q2150.1 IP GTP-C L1 GTP-U UDP L2 IP GGSN GGSN Uu Iub Iups Gn OBLIGATORY STUFF UE / PS CN PROTOCOL STACK 11. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 11 (164) 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 12. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 12 (164) UTRAN CONNECTIONS ABSTRACTION If synchronisation status, dedicated traffic and dedicated control channels only are shown on a UTRAN Block Diagram.. MSC RNC NB UE UTRAN Status Dedicated Control Channels Synchronisation Status Dedicated Traffic Channels These are the parts of UTRAN that need to be configured at call setup. A call cannot proceed without all of these connections and synchronisation 13. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 13 (164) UTRAN CONNECTIONS KEY TO BLOCK DIAGRAM Using RED to denote configured and WHITE to denote not configured. MSC RNC NB UE UTRAN Status MSC RNC NB UE UTRAN Status Example 1: No dedicated traffic or control, Air interface synchronised. i.e. UE in Idle Mode Example 2: Dedicated control between RNC and UE, No dedicated traffic, Synchronisation between RNC and UE, i.e. RRC Connection exists over dedicated channels 14. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 14 (164) WARNING - PLEASE READ This Presentation Contains Ladder Diagrams. . . . Lots of them !!!!! View Presentation Request View Presentation Ack Ladder Diagram IndicationEnter sleep Mode Request Sleep mode complete Ladder Diagram - Normal Procedure Ladder Diagram - Normal Procedure BodyBody BrainBrain You have been warned . . . . 15. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 15 (164) CALL FLOW SCENARIOS For ease of understanding the Call Flow Scenarios will be split into 6 parts. 1. Node B Initialisation - Appendix A 2. Cell Camp-on / Location Update - Appendix B 3. Circuit Switched Call set-up 4. Circuit Switched Call tear-down 5. Packet Switched Call set-up 6. Packet Switched Call tear-down 16. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 16 (164) PART 1 Node B Initialisation and Cell Camp on for First Call Refer to Appendix A 17. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 17 (164) PART 2 UE Camp On & Location Update Refer to Appendix B 18. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 18 (164) PARTS 3 - 4 Circuit Switched Calls Parts 3 & 4 Call Setup and Tear Down Scenarios 19. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 19 (164) PART 3 - UE INITIATED CALL SET-UP (CS) Procedure Overview In this Procedure the UE is attached to the Network in Idle mode. The call setup is Mobile Originated (mo). The following steps need to be executed in order for a mo call to complete; 1. RRC Connection Setup 2. Service Request 3. Security Procedures (Identity / Authentication / Security mode) 8. Call Setup Request 9. Radio Link and RAB Configuration 10. Call Connection 20. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 20 (164) PART 3 - UE INITIATED CALL SET-UP (CS) Procedure OverviewMessage (1): Connection RequestMessage (1): Connection Request Type: RRC Channels: CCCH / RACH Main IEs: 1. Initial UE ID Establishment Cause Initial UE capability Type: RRC Channels: CCCH / RACH Main IEs: 1. Initial UE ID Establishment Cause Initial UE capability UEUE Node B Node B RNCRNC MSCMSC RRC Connection Request (RACH) [1] MSC RNC NB UE UTRAN Status 21. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 21 (164) PART 3 - UE INITIATED CALL SET-UP (CS) Procedure OverviewMessages (2): Radio Link Set-up Request / ResponseMessages (2): Radio Link Set-up Request / Response UEUE Node B Node B RNCRNC MSCMSCType: NBAP Main IEs: 1. Cell ID, TFS / TFCS Frequency, UL Scrambling Code DL Channelisation Code Power Control Info 2. Transport Layer Address Sig. Link termination DL Channelisation Code DCH Binding ID Type: NBAP Main IEs: 1. Cell ID, TFS / TFCS Frequency, UL Scrambling Code DL Channelisation Code Power Control Info 2. Transport Layer Address Sig. Link termination DL Channelisation Code DCH Binding ID NBAP RL setup Req. NBAP RL setup Resp. RRC Connection Request (RACH) [1] [2] MSC RNC NB UE UTRAN Status 22. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 22 (164) PART 3 - UE INITIATED CALL SET-UP (CS) Procedure OverviewMessages (3): Establish Request (ERQ) / Confirm (ECF)Messages (3): Establish Request (ERQ) / Confirm (ECF) UEUE Node B Node B RNCRNC MSCMSCType: ALCAP Main IEs: Destination address, DSAI, ALC, CEID, OSAI, SUGR, SSISU Type: ALCAP Main IEs: Destination address, DSAI, ALC, CEID, OSAI, SUGR, SSISU NBAP RL setup Req. NBAP RL setup Resp. ALCAP ERQ ALCAP ECF RRC Connection Request (RACH) [1] [2] MSC RNC NB UE UTRAN Status 23. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 23 (164) PART 3 - UE INITIATED CALL SET-UP (CS) Procedure OverviewMessages (4): DCH-FP DL / UL SynchronisationMessages (4): DCH-FP DL / UL Synchronisation UEUE Node B Node B RNCRNC MSCMSCType: DCH-FP Main IEs: Type: DCH-FP Main IEs: ALCAP ERQ ALCAP ECF RRC Connection Request (RACH) FP DL Synchronisation FP UL Synchronisation NBAP RL setup Req. NBAP RL setup Resp. [1] [2] MSC RNC NB UE UTRAN Status 24. Ericsson Internal | Ericsson AB 2011 | 2011-05-16 | Page 24 (164) PART 3 - UE INITIATED CALL SET-UP (CS) Procedure OverviewMessages (5): Connection Set-up / CompleteMessages (5): Connection Set-up / Complete UEUE Node B Node B RNCRNC MSCMSCType: RRC Channels: 1. FACH 2. DCCH Main IEs: 1. Initial UE ID, RNTI, CapUpReq, TFS, TFCS, frequ, DL Scram + Chann codes, Power control info. 2. UE Capability, Ciphering, Integrity info Type: RRC Channels: 1. FACH 2. DCCH Main IEs: 1. Initial UE ID, RNTI, CapUpReq, TFS, TFCS, frequ, DL Scram + Chann codes, Power control info. 2. UE Capability, Ciphering, Integrity info RRC Connection Request (RACH) FP DL Synchronisation FP UL Synchronisation RRC Conn. Setup (FACH) RRC Conn. Setup Comp (DCCH) ALCAP ERQ ALCAP ECF NBAP RL setup Req. NBAP RL setup Resp. [1] [2] MSC RNC NB UE UTRAN Status 25. Ericsson Internal | Eri