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Migration towards IP standards in GSM Mobile Networks

Migration towards IP standards in GSM Mobile Networks. Rajkrishna Srinivasan 780915A355 2G1330, Wireless and Mobile Network Architecture 3 rd June 2004 Royal Institute of Technology rsr@kth.se. Structure. Why this topic? GSM Introduction The life cycle IP in GSM IP in GPRS IP in 3G

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Migration towards IP standards in GSM Mobile Networks

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  1. Migration towards IP standards in GSM Mobile Networks Rajkrishna Srinivasan 780915A355 2G1330, Wireless and Mobile Network Architecture 3rd June 2004 Royal Institute of Technology rsr@kth.se

  2. Structure • Why this topic? • GSM Introduction • The life cycle • IP in GSM • IP in GPRS • IP in 3G • The Future

  3. Why this topic? • Technology suffers due to proprietary standards • IP - Open Technology • Telephony through IP picking up • Best Effort Service in Carrier Grade System?

  4. GSM Introduction - 1 • CEPT - Conférence Européenne des Postes et Télécommunications • SMG – ETSI • GSM – Global System for Mobile Communication • A Success Story – 190 + countries

  5. AUC VLR HLR SS MSC A Interface BSC BSC BSS BTS BTS MS MS GSM Introduction - 2

  6. Life Cycle • Need to evolve • New methods to make money • Data Traffic • Existing spectrum getting congested

  7. GSM Architecture

  8. IP in GSM • No provision for IP in this architecture • Ericsson Trials of “GSM on Net”1 • But still no “real support” for DATA – only HSCSD • Since IP not used -> Problems of interoperability 1 -http://www.theregister.co.uk/1998/12/23/ericsson_plans_merger_of_wireless/

  9. GPRS • First attempt to address problem of handling data • Consists of GSNs (Support Nodes) • Pay for data usage – always connected! • Only an interim solution

  10. IP in GPRS Application IP IP Relay SNDCP GTP - SNDCP GTP - U LLC LLC UDP UDP Relay RLC BSSGP RLC BSSGP IP IP MAC MAC Network Network L2 L2 Service Service GSM RF GSM RF L1bis L1bis L1 L1 Um Gb Gn Gi MS BSS SGSN GGSN

  11. 3G • What is 3GPP • Significance of Release 5 • WCDMA UMTS • SIP and IP for Multimedia

  12. 3GPP Architecture • Radio Network Controller • Node B • Home Subscriber Server • IP Multimedia Subsystem

  13. Why IMS • Release 4 of UMTS problems • VoIP market growth • Session Initiation Protocol -> Call Control Protocol • New content, killer apps, multimedia

  14. Why SIP in IMS • Change in internet model • Client Server – HTTP, FTP etc • Now it’s Peer to Peer • Here SIP has five roles in Establishing, maintaining and terminating communications: User Location, User Availability, User Capability, Call Setup and Call Handling

  15. 3GPP Architecture

  16. Open Service Access • Who is going to make use of all this technology? • How to boost ARPU? • Parley group • Parley OSA -> Common Application Programming Interface (API)

  17. OSA Architecture Application server Application discovery OSA API Open Service Access Interface class User Location framework Service capability server(s) WGW HLR CSE Servers WPP OSA internal API

  18. Challenges for IP • IP designed for traditional internet - delay is OK! • Lower layers shielded – Preventive strategy for critical applications • Notorious radio links

  19. The Future • 3GPP – Europe and Japan • 3GPP2 – America and Korea • IP in 3GPP and 3GPP2

  20. Conclusion • All IP alternative – Huge Bandwidth Available • More revenues – ARPU vs. OpEx/CapEx • More enriched services • 4G – The “all IP” system

  21. Thank You • Questions and Comments • Mail address: rsr@kth.se • Mobile: +46 736959977

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