1. CAT2000 GSM Evolution Towards UMTS IFT6275 Shouwen Zhang Fuman Jin

2. GPRS: General Packet Radio Service IMT- 2000 Goals p Global system for wireless communications p Multi-environment operation  Vehicular  Pedestrian and Outdoor-to-Indoor  Indoor Office  Satellite p Support for packet data and circuit-switched services p Multimedia services support p Expected data rates:  144 kbps in vehicular  384 kbps in pedestrian  2 Mbps in indoor office environment p IMT- 2000 spectrum allocated at WARC 1992 in the 2 GHz band p Year 2000+ services (subject to market considerations)

3. GPRS: General Packet Radio Service n Low cost n Light weight n Low power drain / long talk time n Toll-quality voice n High security n Use multiple devices with the same User ID  Services, routing and charging by personal ID/subscription n International roaming n Broad range of services  Fixed and mobile  Voice, data, multimedia IMT-2000 End User Terminal Requirements

4. GPRS: General Packet Radio Service IMT- 2000 Key Architectural Requirements p Broadband Radio Access  Data Rates: 144, 384, 2000 kbps  Evolution from 2G (CDMA, TDMA, GSM, PHS, etc.)  Mobility vs. Fixed Wireless Access  Harmonized Spectrum Allocations p Broadband Backbone Infrastructure  Integrated Voice, Data, Image p Network Architecture  Functional Distribution  WIN, GSM MAP, INAP

5. GPRS: General Packet Radio Service Third-Generation Systems Design Goals p Meet IMT-2000 requirements p Offer additional capacity and service enhancements as an evolution of 2G systems (TDMA based GSM and IS-95 / ANSI-41 based CDMA) p Integrated voice and data system  Optimized for voice and packet services  Support higher rate circuit services p Smooth, backwards-compatible evolution from existing 2G systems  Evolve network infrastructure and software from 2G systems  New dual-mode terminals allow gradual build-up of high data rate services in 2G service areas  Coexistence of 2G voice and data terminals with new wideband terminals

6. GPRS: General Packet Radio Service Third-Generation Capabilities for Wideband Wireless multi-media n Wide-band “bit pipe” between service providers and end-users lup to 384 kb/s in wide areas lup to 2 Mb/s in limited areas n IP connectivity from end-to-end lData ( and Voice) lReal-time and non real-time n High bit-rate Services lat least 384 kb/s wide area lup to 2 Mb/s in indoor environment n Multimedia Applications n Optimized for Packet-data transfer/internet access

7. Migration Paths

8. GPRS: General Packet Radio Service GPRS ' GPRS  Packet-based wireless communication service  New bearer service for GSM  evolutionary step toward Enhanced Data GSM Environment and Universal Mobile Telephone Service

9. GPRS: General Packet Radio Service Benefits  Higher data rates  Using all 8 Packet Data Channels (PDCH) GPRS can achieve up to 171.2kbps (theoretical maximum)  Packet switched principle  efficient for burst traffic (e.g., Internet traffic)  radio channel only be allocated when needed  spectrum efficiency  User-friendly billing  payment based on the amount of transmitted data

10. GPRS: General Packet Radio Service GPRS  How to implement GPRS from GSM network: 8 Packet Data Channels (PDCH) Gateway GPRS Support Node (GGSN) Serving GPRS Support Node (SGSN)-- GSM terminal change to have a GPRS protocol stack and application software A Packet Control Unit (PCU) is added to each Base Station Subsystem (BSS) Radio link Contol Media Access Control Radio resource configuration and channel assignment

11. GPRS: General Packet Radio Service GPRS System Architecture

12. GPRS: General Packet Radio Service SGSN  Serving GPRS Support Node  perform mobility management for GPRS mobile stations  manage the logical link to mobile stations  route and transfer packets between mobile stations and the GGSN (Gateway GPRS Support Node)  handle PDP(Packet Data Protocol (IP and X.25)) contexts  inter-work with the radio resource management in the BSS  authentication  charging (billing customers)

13. GPRS: General Packet Radio Service GGSN  Gateway GPRS Support Node  function as a border gateway between the GPRS network and the packet data network (e.g., IP and X.25)  set up communications with the packet data network  route and tunnel packets to and from the SGSN  mobility management  authentication  charging

14. GPRS: General Packet Radio Service Services  Bearer services  PTP(Point-To-Point) –transfer data packets between two users –connectionless mode (e.g., for IP) –connection-oriented mode (e.g., for X.25)  PTM(Point-To-Multi-point): not available yet –transfer data packets from one user to multiple users –multicast service –group call service  Supplementary services  call forwarding unconditional

15. GPRS: General Packet Radio Service Routing GPRS Routing Example

16. GPRS: General Packet Radio Service Routing MS SGSN GGSNHost logical link tunnel Internet/P DN Packt IP datagram GPRS NetworkIP Network

17. GPRS: General Packet Radio Service Logical Channels

18. Enhanced Data rates for GSM Evolution (EDGE) n 200 kHz carrier spacing n Reach up to 384kbps n 8 TDMA time-slot n Modulation Format 8-PSK as opposed to GMSK (in GPRS, HSCSD) l8-PSK:encodes 3 bits per modulated symbol GMSK: 1 bit per symbol n Edge transceiver unit need to be added to each cell n Edge terminal--upgrade to use EDGE network functionality

19. GPRS: General Packet Radio Service EDGE System Architecture

21. GPRS: General Packet Radio Service UMTS n 384 kbps data capability to satisfy the IMT-2000 requirements for pedestrian(microcell) and low speed vehicular (macrocell) environments. n 144 kbps data capability for high speed vehicular environment n 2 Mbps requirement for indoor office is met by using wide band EDGE (1.6 MHz) carrier

22. Path Suggested

23. GSM Path to 3G  HSCSD is not necessary. GPRS is already available.  GPRS is ten times faster than HSCSD.  GPRS expect to be able to offer higher data rates without building too many new sites.  EDGE follows GPRS and allow a quick and cheap rollout of fast mobile service.  GSM->GPRS->EDGE->UMTS : smooth evolution cost-effective

24. Conclusion  GPRS will be deployed cost-effectively in GSM first.  EDGE will follow GPRS to be deployed as a quick and cheap rollout of fast mobile service.  UMTS will finally be deployed upon EDGE.