1. GSMA IPI (IP Interworking) in Asia Qiang Wei weiqiang@chinamobile.com The 4th CJK NGN Working Group Meeting June 24, 2005, Beijing

2. Agenda Background IP Interworking Model Trial in Asia Conclusion

3. Background Today’s IP Network No signaling Simple IP interworking New IP Network With signaling and control -- IMS Services: voice, POC, … Challenges!! Service control & charging ？？ service interworking ？？ IPI – IP Interworking A project in GSMA (GSM Association)

4. IP Interworking Objective –Standardization of service charging –Promote global IP service interoperation Feature –Service based charging –Focus on SIP based services –Not only technical solutions Content –IP interworking model centralized –Business model –Requirements and technical specifications

5. IP Inter-working Model High-quality, managed services High-quality, managed services via commercial agreement with service providers via commercial agreement with service providers value-based pricing (service-based ) value-based pricing (service-based ) Calling Party Pays Calling Party Pays single bill single bill managed third party access via gateways to increase consumer choice. managed third party access via gateways to increase consumer choice. Best effort Best effort no commercial agreement with actual service provider no commercial agreement with actual service provider volume/time pricing volume/time pricing Mobile Party Pays Mobile Party Pays billed by multiple end providers. billed by multiple end providers. Intermediator －－ IPX (IP Packet eXchange) Intermediator －－ IPX (IP Packet eXchange) Inter-network connectivity Inter-network connectivity SIP functionality （ Proxy/Relay ） SIP functionality （ Proxy/Relay ） BSS （ Business Support ） BSS （ Business Support ） Charging : generation, collection and Charging : generation, collection and analysis of CDRs analysis of CDRs IPX utilizes existing technologies ： 1 、 IETF and 3GPP ’ s SIP Protocol 2 、 Architecture based on 3GPP IMS Service control: CSCF 、 ASService control: CSCF 、 AS Service billing CDRService billing CDR Authentication & AuthorizationAuthentication & Authorization Bearer control: PEF/PCFBearer control: PEF/PCF

6. Status of IPI Trial IPI trial in Europe have completed. China Mobile is leading IPI trial in Asia Participants: –Operators: 7 –Vendors: 4 –Carriers: 3 Scope: –IMS NNI (Network to Network Interface) –IPX to IPX Interface –Services: Only peer to peer applications are selected, such as Video sharing, Multimedia Instant Messaging, Gaming, etc.

7. IPI Trial Environment

8. Conclusion Globalization service interworking Service layer: –Interworking –Charging, billing & balancing New business model: IPX operator A possible approach for international NGN internetworking!

9. Thank you!