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3G Network Convergence


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  • 1. 3G Network Convergence The Road to a unified mobile network Dr. Stanley Chia Director, Strategic Technologies, Group R&D-US
  • 2. Contents The OHG Harmonisation Effort and the Global 3G System Proposal MWIF Continued to Drive Network Convergence The Toronto All-IP Harmonization Meeting Putting Words into Actions 2
  • 3. Strong Growth in Mobile Industry 1997 1998 1999 2000 2001 2002 Regional 3G Technology Selection IMT2000 Submissions / OHG Formed 3
  • 4. Ten IMT-2000 Terrestrial 3G System Proposals … TD- TD- EDGE EDGE DECT DECT WCDMA WCDMA SCDMA SCDMA WCDMA CDMA- CDMA- WCDMA 2000 2000 CDMA- CDMA- 2000 2000 WCDMA WCDMA Korea WCDMA USA Europe WCDMA China Japan WIMS WIMS 4
  • 5. … Giving Rise to Multiple 3G Scenarios Unified standards are good for consumers, operators & manufacturers Fragmented Two to Three Unification of Standards Major Standards Standards Unnecessary costs to Same problem as Eliminates unnecessary industry fragmentation industry costs Uncertainty by Maximum industry Stimulates value-added application developers growth not realised services Complexity to consumers Continuation of Meets the needs of “Standards Wars” customers 5
  • 6. Two Uncompromisable Factions … Chip Rate: 3.6864 Mcps Chip Rate: 4.096 Mcps Common Pilot with Dedicated Pilot with Code Division Multiplexing Time Division Multiplexing Synchronous Asynchronous CDMA2000 WCDMA IMT-2000 A Common Chip Rate Uniform Pilot Structures Asynchronous & Synchronous 6
  • 7. … Unwillingly Agreed to a Global Harmonization Framework … Radio Access FDD FDD “Family of 3G TDD DS MC CDMA Modes” Flexible connection between Modes and Core Networks based on operator needs Core Network “Family of 3G Evolved Evolved Systems” GSM MAP ANSI-41 Core Network Network “3G Inter-Family to Network Roaming” Interface MC = Multicarrier DS = Direct Spread NNI = Network Node Interface F/TDD = Frequency/Time Division Duplex 7
  • 8. … Which Led to the Historical OHG Agreement IMT-2000 FDD FDD TDD Direct Spread Multi-carrier Chip Rate 3.84 Mcps 3.6864 Mcps 3.84 Mcps Common Pilot CDM CDM tbd Dedicated Pilot TDM CDM tbd Asynchronous/ Synchronous Synchronization tbd Synchronous as CDMA2000 FDD = Frequency Division Duplex TDD = Time Division Duplex CDM = Code Division Multiplexing TDM = Time Division Multiplexing 8
  • 9. Strong Growth in Mobile Industry 1997 1998 1999 2000 2001 2002 Regional OHG 3G Technology Agreement Selection IMT2000 Submissions / OHG Formed 9
  • 10. But The Core Network Remained More Problematic … Network to Network Interface ANSI-41 GSM-MAP based based Core Network Core Network To ANSI-41CN via To GSM-MAP CN CDMA2000 stack via WCDMA stack MC-Mode MC-Mode DS-Mode DS-Mode Access Access Access Access Network Network Network Network To GSM-MAP CN To ANSI-41 CN via WCDMA L3 & via CDMA2000 L3 CDMA2000 stack & WCDMA stack 10
  • 11. … And the Answer is to Use Hooks and Extensions GSM MAP ANSI-41 GSM MAP ANSI-41 L3 L3 L3 L3 (WCDMA) (CDMA2000) (WCDMA) (CDMA2000) (WCDMA) L3 RRC (WCDMA) Hooks Extension Extension Hooks L3 RRC (cdma2000) L2 (WCDMA) Hooks Extension Extension Hooks L2 (cdma2000) L1 (WCDMA) Hooks Extension Extension Hooks L1 (cdma2000) Additional functionalities which needed to be specified to meet requirements when hooks are in place Functionalities specified in the initial release of the standards for future extensions without major protocol change 11
  • 12. The “Global 3G System” Ideal … Had No Real Industry Interests WCDMA, EDGE cdmaOne Chip rate = 3.84 Mcps Direct-Spread TDD Common Chip rate = 3.84 / Asynchronous Mode Pilot Mode 1.36 Mcps CDM Common Pilot Other parameters tbd TDM Dedicate Pilot 2G to 3G Interoperation Chip rate = 3.6864 Mcps Hooks and extension Synchronous Multi-carrier to be defined to ensure CDM Common Pilot Mode GSM MAP / handoff / roaming CDM Dedicated Pilot ANSI-41 cdmaOne CDMA2000 1X 12
  • 13. Strong Growth in Peak of the Mobile Industry Internet Boom 1997 1998 1999 2000 2001 2002 Regional OHG 3G Technology Agreement Selection IMT2000 MWIF Submissions / Formed OHG Formed 13
  • 14. MWIF Was Formed in 2002 to Drive the Vision of Convergence • A Mobile Internet Environment With: – Interoperability of services and applications with all radio and other media access technologies Includes legacy wireless and wire line networks Common radio access protocol – Standard open interfaces among core network components Plug and play installation and configuration – True customer mobility across all networks – Common service and applications development environment • Single IP based “backhaul” network • Shared equipment between the Internet and Telecommunications communities • Seamless integration of mobile telephony and Internet services and content 14
  • 15. Strong Growth in Peak of the Economy Mobile Industry Internet Boom Slow Down 1997 1998 1999 2000 2001 2002 Regional OHG 3G License 3G Technology Agreement Auctions in Selection Europe IMT2000 MWIF OHG Submissions / Formed Toronto OHG Formed Meeting 15
  • 16. Another Attempt … The OHG / MWIF Toronto Meeting An IP Core Network Harmonization Workshop was held on April 3-4, 2002 in Toronto, Canada. The following conclusions and recommendations were reached: – The harmonization of 3GPP/3GPP2 IP Multimedia Core Networks is a worthwhile and achievable goal. – This should be pursued urgently by both PP groups. – Focus the harmonization efforts to areas where synergies already exist with priority given to the harmonization of: OSA / PARLAY based service APIs. IP Multimedia Subsystem (IMS). – Adopt a single IMS reference model with consistent terminology. – Ensure interoperability between all IMS mobiles. – Ensure application level intersystem IMS roaming 16
  • 17. … And There Is A Glimpse of Hope The Meeting agreed that 3GPP and 3GPP2 should: – avoid duplication of work – align the IMS and service aspects of their respective Reference Models – collaborate closely on any requirements to be input into IETF related to SIP extensions and other issues – establish formal and informal mechanisms (e.g., joint e–mail exploder) to promote harmonization activities – consider routes to joint requirements analysis and joint specification development – work together on a common evolution strategy taking into account the vision work in other groups including ITU and IP2 Ad Hoc It was also agreed that: – the existing schedules (e.g., 3GPP Release 5) should not be negatively impacted. – common mobility management is an item for future consideration. – 3GPP2 should utilize 3GPP Release 5 IMS and Parlay 3.1 as the base for their on-going development activities. 17
  • 18. To Put Words into Actions … Vodafone Group and Verizon Wireless have jointly issued an invitation to their strategic suppliers to collaborate on identifying a common core architecture: - An architecture towards which each company can evolve its core network. - The target networks is to be based on a common standard. Such a common core network would support: - Service transparency. - Application portability. - Roaming between Vodafone and Verizon Wireless networks. 18
  • 19. … With A Number of Key Objectives Enable interoperability between CDMA2000 and GSM / WCDMA networks and other wireless technologies. Achieve end-user service and quality of service transparency between CDMA2000 and GSM / WCDMA operators. Share common service applications and service creation capabilities. Enable the deployment of All-IP-based network for voice, data and multimedia services. Adapt a common set of 3GPP / 3GPP2 standards. Assure a coordinated evolution plan from the existing circuit switched and packet data networks to “All-IP” based networks. Drive standards organization to converge to a single common core network standard. 19
  • 20. An All-IP Common Core Concept … A common core network is considered essential to ensure service transparency between CDMA2000 and GSM/WCDMA operators in the long term “Common” core network CDMA2000 UMTS CDMA2000 Terminal UMTS Terminal RAN RAN - or - - or - Multimode Terminal Interface 1 Interface 2 Multimode Terminal CDMA2000 UMTS Radio Interface Interface 3 Radio Interface WLAN Terminal - or - WLAN Multimode Terminal 802.11b / a Radio Interface 20
  • 21. … Some Basic Requirements for the Solution The solution should meet, at least, the following requirements: - Transparent and seamless support of current and evolving services and applications when roaming from one market to another - Seamless support of SIP based call model and service management - Provision to support legacy infrastructure in the respective networks - A common service creation platform - Evolution path to the target IP based architecture - Compatible with existing and future mobiles as well as wireless LAN based radio interfaces - Full quality-of-service support for real-time and non-real-time services IP 21
  • 22. A Potential Evolution Roadmap The evolution to a common core network may need to go through two key stages: - G95 type interoperability and interworking function initially to achieve near term service transparency. - Migration to an “All-IP” platform by the adoption of compatible IP-based core network with capability of supporting multiple radio interfaces. Gateway A single standard IP-based Interworking multimedia Near term function domain / Long term subsystem Multiple core Single core and multiple with multiple radio radio interfaces interfaces 22
  • 23. Key Steps to a Common Core Network Drive the common core solution through the standards bodies Work with suppliers to come up with a single solution Submit requirements to key infrastructure suppliers to derive solutions One core network Verizon Wireless Ubiquity and Vodafone to agree on common Transparent core requirements services 23
  • 24. “This time like all times is a good one, if we but know what to do with it.” -Ralph Waldo Emerson Thank You 24