1. Interworking IPv6 in Mobile Networks Mat Fordmatthew.ford@bt.com

2. © British Telecommunications plc, 20022 Agenda  Broadband IP network evolution  Broadband/3G integration  Benefits of MobileIPv6  Interworking options - NAT-PT - DSTM  Smartv6 Demonstration  Conclusions

3. © British Telecommunications plc, 20023 Typical Broadband IP Model L2TP Tunnel Access PoP ISP INTERNET Carrier IP core Access PoP

4. © British Telecommunications plc, 20024 BAS Broadband ‘Direct’ Access PoP ASP INTERNET Access PoP Carrier IP core

5. © British Telecommunications plc, 20025 IP Mobility  No true IP mobility is available  L2TP provides limited IP mobility within the boundaries of the specific access network  Only MobileIP technology can provide true IP mobility to end users

6. © British Telecommunications plc, 20026 Agenda  Broadband IP network evolution  Broadband/3G integration  Benefits of MobileIPv6  Interworking options - NAT-PT - DSTM  Smartv6 Demonstration  Conclusions

7. © British Telecommunications plc, 20027 IPv6 in 3G Networks IM Domain IPv6 PS Domain IPv4 or IPv6 Existing IPv4 Internet SGSN GGSN Mobile Terminal SIP Proxy Server Media/ Signalling Gateway PSTN SIP Client SIP Proxy Server GTP Operators ISP WWW Server

8. © British Telecommunications plc, 20028 IPv6 in Broadband Networks DSLAM ATM IP Core Internet BAS Internet VC – Variable Bit Rate SIP VC – Constant Bit Rate IPv6 Multimedia Domain SIP Serve r Other Operator’s Multimedia Domain Globally routable IPv6 address(es) IPv4 or IPv6 address

9. © British Telecommunications plc, 20029 Broadband/3G Integration  Unified infrastructure - No interworking or gateways  No addressing problems - Forecasted volumes easy to cater for  Leverage application development for maximum returns

10. © British Telecommunications plc, 200210 Agenda  Broadband IP network evolution  Broadband/3G integration  Benefits of MobileIPv6  Interworking options - NAT-PT - DSTM  Smartv6 Demonstration  Conclusions

11. © British Telecommunications plc, 200211 MobileIPv6 Benefits  MobileIPv6 + Broadband ‘Direct’ model is a powerful enabler of IP mobility  End-users running services are continuously on-line and contactable while roaming between broadband network access segments

12. © British Telecommunications plc, 200212 MobileIPv6 and Broadband  Without MobileIP, connections from UserA to UserB have to go via ISP A and ISP B  Inefficient routing  Poor scalability  Multiple single-points- of-failure ISP B User A User B ISP A

13. © British Telecommunications plc, 200213 MobileIPv6 and Broadband ISP B User A User B ISP A Initial traffic only passes through ISPs Subsequent traffic direct to Care-of-address Home Agent Holds care-of- address of user B Holds care-of- address of user A

14. © British Telecommunications plc, 200214 Agenda  Broadband IP network evolution  Broadband/3G integration  Benefits of MobileIPv6  Interworking options - NAT-PT - DSTM  Smartv6 Demonstration  Conclusions

15. © British Telecommunications plc, 200215 IPv6 Transition & Interworking  Transition - how we migrate to IPv6  Interworking - how we continue to operate with IPv4  New networks have no transition requirements  Transition requirements for core networks met through routine upgrades

16. © British Telecommunications plc, 200216 IPv6 Interworking  Interworking multimedia domains - Enabling SIP application interworking - Deploy proxies at the network boundary  Interworking network core - Dependent on type of address allocation to end- user - Translation is required where user has no IPv4 address

17. © British Telecommunications plc, 200217 IM Domain IPv6 PS Domain IPv4 or IPv6 Existing IPv4 Internet SGSN GGSN Mobile Terminal SIP Proxy Server Media/ Signalling Gateway PSTN SIP Client SIP Proxy Server GTP Operators ISP WWW Server Interworking Options Potential points of IPv4/IPv6 interworking support

18. © British Telecommunications plc, 200218 NAT-PT Translation DSL Access Network IP Network (IPv4) Access Router (IPv6) End User Equipment (IPv6 only) NAT-PT IPv6 DNS IPv4 DNS DNS exchange initiates communication via translator Communication with IPv4 via translator

19. © British Telecommunications plc, 200219 DSTM Support for native IPv4 DSL Access Network IP Network (IPv4) Access Router (IPv6) End User Equipment (Initially IPv6 only) DHCPv6 End user discovers communication to IPv4 – requests temporary IPv4 address Native communication with IPv4 IPv4 over IPv6 tunnel

20. © British Telecommunications plc, 200220 Agenda  Broadband IP network evolution  Broadband/3G integration  Benefits of MobileIPv6  Interworking options - NAT-PT - DSTM  Smartv6 Demonstration  Conclusions

21. © British Telecommunications plc, 200221 Smart v6 Trial  Collaboration between BT, SmarTone and Ericsson  Demonstrating: - IPv6 applications - IPv6/IPv4 interworking - IPv6 over GPRS - MobileIPv6 - Intelligent content delivery

22. © British Telecommunications plc, 200222 Smart v6 Trial  Scenario 1: IPv6-only clients, IPv6-only network running Quake, mp3, Video, WWW  Scenario 2: Interworking IPv4 and IPv6  Scenario 3: MobileIPv6 and content customisation  Scenario 4: Inter-technology handover

23. © British Telecommunications plc, 200223 IPv4 GPRS Container RNC WLAN BS2 Serial Router 2 Ultima 202.140.100.18 202.140.100.22-30 HK Live IPv4 MAP 202.140.100.20 Scenario 4: Fixed/Mobile roaming R520 Ethernet Scenario 3: Broadband MobileIPv6 Scenario 2: Wireless broadband IPv6 WLAN BS1 Scenario 1: Fixed broadband IPv6 VOD Local Native IPv6 Network HA Hub 3Hub 2 APPS (WWW, MP3, Quake, DNS) 202.140.100.17 PROXY 202.140.100.19 CN Hub 1 Router 1 Ethernet 6in4 tunnel 202.140.100.21 PC 6in4 tunnel Private IPv4 addresses To UK PC MIPv6

24. © British Telecommunications plc, 200224 Scenario 1: Broadband IPv6 Applications Server DNS Server HK IPv6 Network WLAN Quake IPv6 Local Internet IPv6 MP3 Audio IPv6 VoD

25. © British Telecommunications plc, 200225 Scenario 2: IPv6 meets IPv4 DNS Server HK IPv6 Network IPv4 Internet UK IPv6 Network IPv6 Internet IPv4 Internet IPv6 MP3 Audio

26. © British Telecommunications plc, 200226 Scenario 3: MobileIPv6 Portal Server Database Server Home Agent IPv4 Internet HK IPv6 Network Local News & Weather Home Domain Office Domain WLAN Business News, Shares & Reminders WLAN MIPv6

27. © British Telecommunications plc, 200227 Scenario 4: Inter-technology handover Portal Server Database Server Home Agent IPv4 Internet WLAN HK IPv6 Network GPRS Business News, Shares & Reminders Mobile Domain Low Bandwidth Business News, Shares & Reminders GPRS Office Domain High Bandwidth Business News, Shares & Reminders Reformatted MIPv6

28. © British Telecommunications plc, 200228 Smart v6 Trial

29. © British Telecommunications plc, 200229 Agenda  Broadband IP network evolution  Broadband/3G integration  Benefits of MobileIPv6  Interworking options - NAT-PT - DSTM  Smartv6 Demonstration  Conclusions

30. © British Telecommunications plc, 200230 Conclusions  Provide a Broadband ‘Direct’ architecture - No ISP lock-in - Optimises bandwidth consumption - Greater flexibility for end-users  Build a network that will scale - Use IPv6  Allow for ‘always-on’ P2P applications - Requires globally routable addressing - Requires IPv6

31. © British Telecommunications plc, 200231 Conclusions  Prepare for 3G multimedia convergence - 3G IP multimedia *will* run IPv6 only  IPv6 provides many advantages for broadband - Autoconfiguration, mobility, security…  Transition and migration issues must be overcome

32. © British Telecommunications plc, 200232 Useful Links  www.ist-ipv6.org  www.bt.com/ipv6  www.6winit.org

33. © British Telecommunications plc, 200233 www.bt.com/ipv6 matthew.ford@bt.com