1. Muse confidential Broadband Europe 2007 We3A.3 Document:An Implementation of Application Layer based continuous Mobility for Conversational Services Date:2007-12-05 Originator:Stefan Wahl, K. Oberle, M. Stein, J. Riemer, C. Peña (TID Telefonica)

2. Broadband Europe 2007 We3A.3 — 2 Agenda > The Multi-Service Edge Router Concept (MS-ER) A single node to deploy IMS: The MS-ER > Seamless Session Mobility across Devices and Technologies > Demonstrator > Conclusions

3. Broadband Europe 2007 We3A.3 — 3 > Single comprehensive IMS network element building a cluster (grid style) of distributed call and application server – with architecture inherent load balancing and redundancy, – flexibility and scalability on (sub-) function level – with preference for local and focused processing IMS P/I/S-CSCF – with improved intra cluster signaling efficiency – reduced number of message flows through combined functions Media processing MS-ER cluster is fully IMS compliant Multi-Service Edge Router (MS-ER) IP Transport Stream Switching Media Processing Session Signaling App. Server User- Network- Interface SOAP SIP P2P-SIP Middleware incl. inter MS-ER resource management PSTN GW Media Server AS Optimized call and control flows; inherent protection system IP Transport Stream Switching Media Processing Session Signaling App. Server MS-ER node flavors of MS-ER nodes MS-ER node MS-ER domain

4. Broadband Europe 2007 We3A.3 — 4 Multi-Service Edge Router (MS-ER) SIP MS-ER Domain MS-ER Node SIP MS-ER Node Interface: SIP marshalling, Serialization, IP transport Interface: SIP un- marshalling, Parsing, security, IP transport SIP Object Oriented Method Invocation Intra MSER domain message exchange: binary message object representation of the SIP message Grouping of IMS control functions Integration of Media Layer functions Integrated Application Layer functions

5. Broadband Europe 2007 We3A.3 — 5 IMS architecture 3GPP Rel6+ Tispan IMS Rel 1 (PES not included) AS Access NetworkVisited NetworkHome Network Inter domain Application provider Call Control provider P-CSCFI-CSCF S-CSCF SGW I-CSCF 3rd-Party SIP SGW HSS/UPSF IBCF IWF I-BGF SPD F Gq’ A-RACF Rq ( Diameter ) C-BGF Ia ( H.248 ) RCEF Re (Diameter) RACS NASS CPE xDSL SGSN GGSN UMTS/GPRS PDF Go (COPS) Transport provider SIP Gq PEP SIP TISPAN3GPP MRFC MRFP Mp ( H.248 ) SIP THI G MS-ER

6. Broadband Europe 2007 We3A.3 — 6 Multi-Service Edge Router Cross Domain Mobility Solution for FMC Cross domain session mobility IMS Core Domain 1 Domain 2 AS IP Transport Session Signaling Media Processing Stream Switching Service logic for seamless session mobility control Service logic for joint mobility detection Foreign Network Distributed AS and MRF enable cross domain seamless session mobility

7. Broadband Europe 2007 We3A.3 — 7 > Less processing of SIP messages and less signaling Significant portion of the SIP messages between P-, I- and S-CSCF and AS can be processed within one MS-ER network node using a fine-tuned  intra MS-ER protocol Inter MS-ER network element signaling and control messages use an optimized MS-ER internal protocol.  inter MS-ER protocol > High scalability for signaling and IN like applications, like TeleVoting Load balancing which prefers local processing but can smoothly shift in a fine grained way processing (sub-)tasks to other MS-ER nodes > Network architecture inherent redundancy solution Inherent structural redundancy and load balancing > Less management effort One single breed of box. Advantages of MS-ER

8. Broadband Europe 2007 We3A.3 — 8 Agenda > The Multi-Service Edge Router Concept (MS-ER) A single node to deploy IMS: The MS-ER > Seamless Session Mobility across Devices and Technologies > Demonstrator > Conclusions

9. Broadband Europe 2007 We3A.3 — 9 Seamless Session Mobility across Devices and Technologies Application Layer Mobility Terminal Mobility Access Network L2 mobility e.g. GSM - same device - same access technology IP-based Network L3 mobility + Session Mobility Access Network e.g. WLAN e.g. xDSL Mobile IP Technologies - same device - different IP-based access technology.. allows Service Adaptations MIP compliant + complementary Access Network + Technology Agnostic POTS/ ISDN POTS/ ISDN WLAN WiMAX GSM EDGE GSM EDGE Services S-CSCF I-CSCF P-CSCF IMS Services Mobility Management IMS Services DB Services HSS/ HLR Handoff IP based Network Wireline xDSL Wireline xDSL Appl. Layer mobility + ++ Personal Mobility - different devices - different access technology Application Layer Mobility

10. Broadband Europe 2007 We3A.3 — 10 Seamless Session Mobility across Devices and Technologies Scenario Description SIP Client Terminals GSM GW Bob IMX GSM network Pa2Pa MGW Call setup to Alice@unique.de MS-ER Alice@ unique.de seamless personal/session mobility MS-ER MS-ER domain This Seamless Session Mobility Solution protects Alice‘s privacy!

11. Broadband Europe 2007 We3A.3 — 11 Seamless Session Mobility across Devices and Technologies Applying an AS controlled conferencing or T-media module MSER T-Media Module Step 1: By e bi-directional audio/video streams Step 3: copy audio/video stream Step 2:

12. Broadband Europe 2007 We3A.3 — 12 Agenda > The Multi-Service Edge Router Concept (MS-ER) A single node to deploy IMS: The MS-ER > Seamless Session Mobility across Devices and Technologies > Demonstrator > Conclusions

13. Broadband Europe 2007 We3A.3 — 13 Demonstrator Motivation for the Mobility Demonstration Two possible demonstrations > Optimized Call Flow Efficiency on a MS-ER domain requires huge hardware installations demonstration of efficiency only with measurement equipement Feature is unattractive for demonstration but attractive to show simulation results > Seamless Session and Personal Mobility across devices and different technologies Mobility logic within the MS-ER controls the seamless session/personal mobility Mobility to non-IP/SIP technologies (e.g. GSM) Media processing

14. Broadband Europe 2007 We3A.3 — 14 Seamless Session Mobility across Devices and Technologies Domains involved in the demonstrator SIP2IMS GW MS-ER Demonstrator (xCSCF, AS & MGW) HSS IETF SIP [RFC 3261] Diameter Cx [TS 29.228] 3GPP SIP [TS 24.229] SIP2IMS GW IETF SIP [RFC 3261] 3GPP SIP GSM/SIP GW GSM SIP2IMS GW IETF SIP Alice‘s devices Bob‘s device

15. Broadband Europe 2007 We3A.3 — 15 Seamless Session Mobility across Devices and Technologies Demonstrator: Mobility trigger blade HSS A7720/A5350 SIP2IMS P-CSCF I-CSCF S-CSCF AS: Mobility Comp. MEGACO cl MEGACO srv MEGACO (Add [A], Subtract [S], Modify [MF]) MGW* (MSW) 1 2 3 „INVITE Bob“ mobility trigger Bob Alice

16. Broadband Europe 2007 We3A.3 — 16 Multi-Service Edge Router A5350 Application Server Runtime A7720 Access Border Control R&I Seamless Session Mobility Service Seamless Session Mobility across Devices and Technologies Demonstrator Architecture (with call legs) R&I SIP2IMS Gw Fraunhofer module Alcatel-Lucent module IMS functional entity functional entity Interface (IMS type) Fraunhofer Home Subscriber Server Media Stream Switch HSS SIP (ISC) IMS AS H.248 IETF SIP [RFC3261] RTP/RTCP (Mb) IETF SIP [RFC3261] H.248 MGW RTP/RTCP (Mb) S-CSCF P-CSCF I-CSCF SIP (Gm) SIP (Mw) SIP2IMS Diameter (Cx) HTTP (Ut) AliceBob

17. Broadband Europe 2007 We3A.3 — 17 Seamless Session Mobility across Devices and Technologies Demonstrator Set-up at TID (only MS-ER) NSP1: 201 NSP2: 202 MGNT: 4093 Service Plane ISAM 7302 0/1 0 1 2 3 0/6 201 e1e4 e5e20/7 202 12.1.2.2/24 11.1.2.2/24 e3 4093 e6 mirror SIP phone SIP phones IMX P2P MGW MSER 23.1.1.2/24 0/3 e0 0/4 0/2 Alice 1 Bob Alice 2 Home 1 Home 2 MNG Aggregation Switch Edge Router

18. Broadband Europe 2007 We3A.3 — 18 Agenda > The Multi-Service Edge Router Concept (MS-ER) A single node to deploy IMS: The MS-ER > Seamless Session Mobility across Devices and Technologies > Demonstrator > Conclusions

19. Broadband Europe 2007 We3A.3 — 19 Conclusions > Multi-Service Edge Router (MS-ER) features increase the overall message efficiency scalable application support architecture inherent redundancy solution simplified network architecture > Application Layer Session Mobility access network technology agnostic solution device and access network depending media adaptations (e.g. voice only  voice and video) > Demonstration of a homogeneous seamless session mobility solution across physical devices and access network technologies (GSM, IP-based)

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