1. Lucent Technologies – Proprietary Use pursuant to company instruction 1 3GPP2 Workshop MMD IMS Architecture June 28, 2005 Anne Y. Lee IMS Systems Engineering Lucent Technologies aylee@lucent.com (630)713-1257

2. Lucent Technologies – Proprietary Use pursuant to company instruction 2 Agenda:  Operator MMD/IMS – Deployment Challenges  Proposal to Address Challenges  Standards Implications

3. Lucent Technologies – Proprietary Use pursuant to company instruction 3 MMD/IMS standards definition has: –Many functional entities –Many interfaces Some operators may find that for deployment of their MMD/IMS solution, they will need: 1) Aggregation of functional entities into small number of platforms : –Allow for easy mixing & matching of MMD/IMS “boxes” from multiple vendors –Minimizes operations costs 2) Regional allocation/assignment of IMS servers: –Optimizes performance for “roamers” –Reduces bearer & signalling paths Operator MMD / IMS Deployment Challenges

4. Lucent Technologies – Proprietary Use pursuant to company instruction 4 (1)Solution: Aggregation  Currently, no industry convention for aggregation –Currently, every vendor is developing a different combination of MMD/IMS functional entities on their platform(s).  Advantages of an industry convention for product aggregation of MMD/IMS functional entities –Reduces interoperability testing to manageable number or scenarios –Reduces operations costs by: Minimizing number of platforms to maintain Minimizing number of interfaces to monitor  Next slides show proposal for one view of aggregation

5. Lucent Technologies – Proprietary Use pursuant to company instruction 5 Example Proposal for Aggregation: Functional Clusters  ACP (application control point): Includes session control and management, data management for service execution, interworking with other MMD, enterprise, and legacy networks. –(P-CSCF, S-CSCF, BGCF, SCIM+, SBC/I-CSCF, Enterprise Telephony Server)  BSCP (bearer services control point): Includes resource management and mobility mgmt functions, charging functions, filtering and security functions –(BCP+, Security, Filtering, Charging, S-MM)  Security center (SC) – Includes management of multi-layer authentication and encryption for user services –(KDC, security services) –All security keys in SC  Services Data Management Center (SDMC) – Includes routing, accounting. –(SDB, AA Server)

6. Lucent Technologies – Proprietary Use pursuant to company instruction 6 Services Data Mgmt Center (SDMC) Security Center (SC) Provisioning Regulatory server Appl svr Media Svr PSTN GW Provisioning and Billing IP diameter SIP diameter UE diameter PSTN/ PLMN PSTN/ PLMN IP diameter IP Application Control Point (ACP) Bearer Services Control Point (BSCP) Proposal for Aggregation of Std IMS Entities: Minimizes Platforms & Interfaces SIP RAN Other MMD Legacy Domains Operator IP Ntwk

7. Lucent Technologies – Proprietary Use pursuant to company instruction 7 (2) Solution: Regional Allocation of IMS Servers  Develop industry guidelines for implementing procedures to support assignment of IMS session servers in region of subscriber access –Current deployment thinking assumes assignment of IMS session servers to those in a fixed geographic location per subscriber regardless of location of subscriber. –Regional assignment does NOT radically change IMS model; need to ensure that vendors implement the standards options that allow for regional allocation  Regional Allocation Benefits: –Reduces signalling path distance minimizing NATs/ALGs, routers, firewalls traversed. Minimizes potential signalling delay. –Reduces bearer path distances for applications with a real-time bearer component such as for conferencing: MRF. (not addressed in standards) –Can easily support access of local services (e.g. local applications referring to local businesses such as restaurants) –Intended to still allow access to subscribed-to applications regardless of location of subscriber

8. Lucent Technologies – Proprietary Use pursuant to company instruction 8 BSCP RAN ACP Regional Site App Server SDMC SC Central Site App Server SDMC SC Central Site BSCP RAN ACP Regional Site BSCP RAN ACP Regional Site BSCP RAN ACP Regional Site BSCP RAN ACP Regional Site BSCP RAN ACP Regional Site BSCP RAN ACP Regional Site BSCP RAN ACP Regional Site Geographic Distribution of MMD/IMS Core Elements

9. Lucent Technologies – Proprietary Use pursuant to company instruction 9 RNC BTS PDSN Access Network P-CSCF AAAPCRF IMS Network Topologies 3GPP2 MMD/IMS Multi-Network View IMS Home Network S,I-CSCFHSS AS Proposed Intra-Operator MMD/IMS Topology S,I-CSCFRNC BTS PDSN Access Network P-CSCF AAAPCRF AS Centralized IMS Components HSS AS IMS Home Network Multi-operator scenario Single operator scenario

10. Lucent Technologies – Proprietary Use pursuant to company instruction 10 Multi-Vendor environment will require vendors developing to common set of requirements Aggregation Impacts – SC 3GPP GAA / Liberty Alliance equivalent need standardization completion in 3GPP2 – ACP New registration procedures or interface between SDMC and SC if move all security keys in SC – BSCP New functionality and/or framework; may need standardization if more than re-packaging existing standardized capabilities. Regional Allocation Impacts – SDMC Adopt SLF from 3GPP or standardize full duplication of all subscriber data in all SDMCs. – ACP Enhancements for procedures to support regional allocation Standards Impacts & Approach

11. Lucent Technologies – Proprietary Use pursuant to company instruction 11 Conclusion / Summary / Next Steps  Aggregation –Reduces interoperability testing to manageable number or scenarios –Reduces operations costs by: Minimizing number of platforms to maintain Minimizing number of interfaces to monitor  Regional Allocation –Reduces signalling path distance minimizing NATs/ALGs, routers, firewalls traversed. Minimizes potential signalling delay. –Reduces bearer path distances for applications with a bearer component such as for conferencing: MRF. (not addressed in standards) –Can easily support access of local services (e.g. local applications referring to local businesses such as restaurants) –Intended to still allow access to subscribed-to applications regardless of location of subscriber  Both deployment challenges can be solved independently  CDMA2000 industry should consider program to ensure multi-vendor interoperability of MMD/IMS “boxes”.