End-to-end User-centric session with QoS continuity

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1 End-to-end User-centric session with QoS continuity Speaker: Yijun WU Noëmie SIMONI STF 360 STQ Workshop - 1 & 2 July 2009 TELECOM ParisTech Computer of Science and Networks Department ETSI All rights reserved

2 Index Requirements of user-centric session Specification---User case and scenarios QoS control and management in ETSI and 3GPP (Sequence diagrams) Proposition: QoS continuity 2

workflow (One session for different services) Dynamic selection of

3 User centric QoS requirements Accessibility of the service using any terminal according the user preference User-centric session for the user s workflow (One session for different services) Dynamic selection of connectivity. Personalization of the service Composition of service User s preferences 3

4 One session 8:30h Home Network Environment 11h CNG Horizontal handover (within same access network ) Office CPE User mobility Specification---User case 1 2 Vertical handover (between heterogeneous accesses) 3 Terminal mobility AN 1 AN 3 AN 2 IMS CN 1 IMS CN 2 CN Heterogeneous network (access and core network ) Service broker SCIM Service broker SCIM AS12 AS11 User centric end-to-end session (QoS continuity according to user s preference) AS22 AS13 AS23 SP1 AS33 SP2 AS31 AS22 Service layer Application Server (Service mobility) Service orchestration Media data AS: Application Server AN: Access Network CN: Core Network SP: Service provider 4

5 Initiator: Terminal Decider: Access network Executor: Access network Scenario 1 (User mobility) PDP session SIP Diameter Others 5

Core S-CSCF Um BTS E3(CWMP) Iub RNC e1 Iu-ps SGSN AN a1/a3 PDP context e1 Gx Re GGSN Ia(H.248) Ia(H.

6 Scenario 2 (Service mobility/user mobility/ vertical handover) Initiator: AS Decider: Network Executor: Network Cx Cx ISC SP1 AS12 AS33 AS11 ISC SP2 AS31 AS22 Gm Gm NASS e2 P-CSCF e4 Rx PCRF UPSF IMS Core Gq S-CSCF RACS I-CSCF UPSF I-CSCF IMS Core S-CSCF Um BTS E3(CWMP) Iub RNC e1 Iu-ps SGSN AN a1/a3 PDP context e1 Gx Re GGSN Ia(H.248) Ia(H.248) CPE e1 AN Access network IP Backbone ABG QoS tunnel IP-edge QoS tunnel C-BGF QoS tunnel I-BGF SIP Diameter Others PDP session/ 6 Connectivity session

7 Scenario 3 (Terminal mobility/horizontal handover) Initiator: Access Network Decider: Access Network Executor: Access Network PDP session SIP Diameter Others 7

8 AAA Server UE NGN QoS control (ETSI TISPAN/3GPP) AF(e.g. P-CSCF) 1 Gm Service Request (e.g. SIP INVITE) Authentication Authorisation Configuration 2 5 PCRF 1 Authentication Autorisation Configuration 3 4 Rx Policy Request GGSN(PCEF) NASS ISC Gx Policy Request Policy and resource Enforcement e4 2 AF(e.g. P-CSCF) Gm Service Request (e.g. SIP INVITE) A-RACF 4 RACS 3 Gq+ SPDF ISC Resource and policy Request UE IP-Edge BGF AS AS Re 5 Policy and resource enforcement 3GPP Ia ETSI TISPAN SIP Diameter Others 8

9 ETSI QoS Control: NASS authentification 1 UE AMF NACF UAAF CLF RACS P-CSCF I-CSCF UPSF S-CSCF NASS 1. PPP setup 2. Access request 3. Access response 4. Configuration request 5. Network location info 7. PPP response 8. DHCP INFORM and Option IP address and other configuration info 9. Network location info request 10. Network location info 12. DHCP response (P- CSCF address) 11. Network location info reponse 13. Register 14. CLF Query (IP Address) 15. CLF Response (Location info) 16. Register (P- Access Network-info) 17. UAR S-CSCF selection 18. UAA 24. OK 19. Register (P-Access Network-info) 20. MAR User profile check 21. MAA (Line-ID) Compare line ID 22. SAR 23. SAA SIP Diameter Others 9

10 2 5 ETSI QoS Control : Service request, resource reservation, policy control RACS UE ABG IP Edge C/I-BGF NASS A-RACS SPDF P-CSCF I-CSCF UPFS S-CSCF AS NASS Authentification & Network attachment 1. SIP Invite Get the informations of the connection downlink from media description in the SDP 2.Invite 3. LIR 4. LIA 5. Invite 6.SAR NASS User profile information sent over the e4 interface comprises QoS profile information and initial gate setting information. Access profile push Request resource Resource admission control Cnf 13. Response admission control 15. Offer response Bgf_req Bgf_Cnf 12.Admisssion Request Define service information 11. Diameter AAR 14. Diameter AAA User profile data progress 7. SAA 8. Invite progress 16. Response conf (opt SDP) Open gate OK Media (RTP) 18. Open gate 19. Open gate response 17. Diameter AAR Determines whether the request information received from the application function is consistent with the policy rules defined in the SPDF. 20. Diameter AAA SIP Diameter Others 10

11 3GPP QoS control 2 5 UE SGSN GGSN(PCEF) PCRF P-CSCF HSS I-CSCF S-CSCF AS12 1. GMM attachment 2. Active PDP context 3. Invite (SDP) Invite: Session transfer ID <destination address> Via: <UE IP> Route: <P-CSCF address>... SDP: <Caller supported codec list> Get the informations of the connection downlink from media description in the SDP Define service information 13. Diameter AAR: Request the authorization token and service information 4. Invite 5. LIR 6. LIA 7. Invite 8. SAR(Service assignment req) 10. Invite 9. SAA progress progress The capabilities of the AS returned along the signalling path, in a 183 (Session Progress) provisional response. 15. Offer response Check service information. Compare with the policy rules of operations and authorize the QoS resource and give authorization token to P-CSCF 14. Diameter AAA Mapping SDP QoS parameters to UMTS QoS parameters 16. Active PDP context request (contain binding infos) 17. Create PDP context request 18. CCR (contains binding infos) 19. CCA Mapping authorized IP QoS parameters to authed UMTS QoS parameters Compare UMTS QoS in PDP context and the authed parameters 20. Active PDP context 21. Response response Media (RTP) SIP Diameter Others 11

12 Proposition: QoS continuity Five dimensions Architecture : 4 layers (User, Terminal, access/core network and service layer), 3 elements (Node, Link, Network) Organization : Initial/decision/execution Protocol : session based, session binding, cross layers (service, transport, user), interface converged, Information: Infoware (operator s database +) and Infosphere (User profile), QoS model (4 criteria et 3 values) Function: Dynamic Management and control of QoS 12

13 End-to-End User centric session QoS signaling QoS signalling Access Network 1 Core Network Service network Access Network 2 Core Network Access Network 3 End-to-end User centric Session Seamless Userware Infosphere AmbientGrid 13

14 VPSN: Service and network integration VPSN QoS signalling VSC X Sub-Networks VPSN: Virtual Private Service Network VSC: Virtuelle Service Community 14

15 QoS signaling trigger events State Change Events QoS in contract QoS out contract QoS Parameters Modification QoS Going Down In contract Service Initiated Events Modification QoS goingdown Out contract 15

16 QoS negociation Request Desirable QoS Service Offer Capable QoS Negociation User Infosphere Demanded QoS Service Availability Reliability Delay Capacity Core network Four criteria Access Network Four criteria Terminal Four criteria Offered QoS Service Availability Reliability Core Delay network Capacity Four criteria Access network Four criteria Terminal Four criteria Provide UPSF+/ HSS+ Contracted QoS Perceived QoS Provided QoS 16

17 Initiator Decider Executor 1 Information update Gx+ P-CSCF Negotiation Procedure of flow 1: User initial 3 8 In/Out contract AS AS Binding information User data AS S-CSCF AF 2 Cx UPSF Infosphere User User data 6 Authorized QoS Resource reservation Re 5 Authorized IP level QoS Binding information Binding information Compare and to enforce Requested IP 9 level QoS 7 User data RACS Network node e4 4 NASS access profile SIP Diameter Others Request and binding information 17

18 Session binding UE 1 Service Session PDP Context 1 Media component information GCID, GGSN address, Bearer Type 1, etc Session and UE information Session ID Equipment ID, QoS & Charging conditions UE information Equipment ID, Session ID I/O Information (Bearer address) User information User ID QoS & Charging preference Service level information SCID, Service ID, SLA, etc Session level information Session ID Media component information UE 2 QoS& Charging conditions GCID, GGSN address, Bearer Type 2, etc. Session and UE information Session ID Equipment ID, QoS & Charging conditions PDP Context 2 IMS Session UE information Equipment ID, Session ID I/O Information (Bearer address) User information User ID QoS & Charging preference Session level information ICID, Session ID,etc Service, Media component information ans UE information Service ID, SDP data, Equipment ID, etc End-to-End User-centric Session Binding 18

19 Conclusion We identify the scenarios representing and concerning to the NGN context (Heterogeneity and mobility) through a user case. We study the QoS aspects in an E2E user-centric session from user s view. We isolate and identify the components who play the important roles for interworking between service and user in order to QoS continuity We propose the QoS signalling in the service layer (VPSN) and cross-layered session binding for the QoS continuity. 19

20 End-to-End User-centric session with QoS continuity We identify the scenarios representing and concerning to the NGN context (Heterogeneity and mobility) through a user case. We study the QoS aspects in an E2E user-centric session from user s view. We isolate and identify the components who play the important roles for interworking between service and user in order to QoS continuity. Key words: User-centric session, QoS continuity, IMS (SIP, Diameter) Speaker: Yijun WU 20

ETSI TR V1.1.1 ( ) Technical Report

ETSI TR V1.1.1 ( ) Technical Report TR 102 805-1 V1.1.1 (2009-11) Technical Report User Group; End-to-end QoS management at the Network Interfaces; Part 1: User's E2E QoS - Analysis of the NGN interfaces (user case) 2 TR 102 805-1 V1.1.1