The document discusses the evolution of mobile technology from 1st generation to 3rd generation networks. It specifically focuses on EDGE (Enhanced Data rates for GSM Evolution) technology, which allows 2G GSM networks to transmit data at up to 384 kilobits per second, providing a higher speed alternative to GPRS for packet-based data services. EDGE builds on existing GSM infrastructure and provides a smooth transition path to 3G networks for mobile operators. It also enables new multimedia and data applications to be introduced on existing GSM networks.

1. Welcome By Karthik

2. EDGE TECHNOLOGY AN EVOLUTION IN MOBILE TECHNOLOGY

3. History In 1 st G AMPS(Advanced Mobile system) developed in U.S in 1983 In 2 nd G there was introduction of CDMA,TDMA and GSM Between 2 nd and 2.5 th G of GPRS Between 2.5 th and 3 rd G there was an introduction EDGE TECHNOLOGY

4. Then Came Digital……….. AMPS CDPD 1G 2G CDMA TDMA GSM IDEN 2.5G GPRS 1XRTT 3G 1X-EVDO EDGE WAN LAN 802.11

5. Introduction Enhanced data for global evolution(EDGE) is a high speed mobile data standard,intended to enable second generation global system for mobile communication (GSM) and time division multiple access(TDMA). Transmits data at up to 384 kilobits per second(Kbps)

6. Topics of Discussion Mobile evolution Edge technology GPRS EDGE system performance Channel coding and frame structure Applications Conclusion

7. Mobile evolution 1 st generation mobile communication 2 nd generation mobile communication 2.5 th generation mobile communication 3 rd generation mobile communication 3G and above

8. EDGE Technology Evolutionary path to 3G services for GSM and TDMA operators Builds on General Packet Radio Service (GPRS) air interface and networks Phase 1 (Release’99 & 2002 deployment) supports best effort packet data at speeds up to about 384 kbps Phase 2 (Release’2000 & 2003 deployment) will add Voice over IP capability

9. Enhanced Data rates for GSM Evolution Can increase the capacity and data throughput typically to 3-4-fold over GPRS Theoretical maximum speeds of up to 473 kilobits per second (kbps) Average recognizable data rates between 80 and 130 kbps TDMA carriers must still convert to GSM, then add GPRS before deploying EDGE technology EDGE

10. 2.5G (Between 2G and 3G) Uses General Packet Radio Services (GPRS) technology. GSM and TDMA were enhanced to packet based networks GPRS is primarily a simple software upgrade on GSM and TDMA Easy for the service providers to update their networks

11. GPRS Packet based networked over existing circuit switched GSM network. GPRS radio resources are used only when users are actually sending or receiving data. Rather than dedicating a radio channel to a mobile data user for a fixed period of time, the available radio resource can be concurrently shared between several users. Brings desktop experience to wireless such as web browsing and chat. Enables file transfer and home automation.

12. 2.5G characteristics Data rates 64 – 144 Kbps . A leap from 9.6kbps of 2G to 64Kbps Packet based networks. Always-on connectivity. Instant messaging + small attachments . New wireless standards started emerging.

13. GPRS shortcomings GPRS packets are sent in all different directions to reach the same destination Potential for packet getting lost or corrupted during the data transmission over the radio link. Though it incorporates data integrity and retransmission strategies, potential transit delays can occur.

14. EDGE Technology EDGE – Enhanced Data GSM Environment. Developed to increase the bandwidth of GPRS technology. EDGE increased the bandwidth of GSM from 144 Kbps to 384 Kbps . Migration towards 3G technology started.

15. Courtesy: http://www.gsmworld.com/technology/index.shtml

16. EDGE System Performance Probability throughput < = X per timeslot X (kb/s) 26 users/sector at 3.84 kbps average load per user Probability packet delay < = X X (msec) % %

17. EDGE modulations

18. EDGE Channel Coding and Frame Structure 464 bits 1 data block Convolution Coding Rate = 1/3 Length = 7 Puncture Interleave Burst N Burst N+1 Burst N+2 Burst N+3 Burst Format 8PSK Modulate 1392 bits 1392 bits 348 bits/ burst 348 bits 468.75 bits 156.25 symbols/slot 0 1 2 3 4 5 6 7 8 Time Slots 1 Time Slot = 576.92 µs Tail symbols 3 Data symbols 58 Tail symbols 3 Data symbols 58 Training symbols 26 Guard symbols 8.25 Modulation: 8PSK, 3 bits/symbol Symbol rate: 270.833 ksps Payload/burst: 348 bits Gross bit rate/time slot: 69.6 kbps - overhead = 59.2 kbps user data 20 msec frame with 4 time-slots for each of 8 bearers

19. Some of the generation mobile phones 2 nd generation phones

20. Personal Digital Assistants & 2.5 G phones Wireless via Bluetooth Internet Wireless via GPRS

21. Combined PDAs and 2.5 G phones

22. 3 G phones

23. Applications EDGE enables operators to introduce 3G data applications into existing GSM existing GSM networks and thereby increase the speed of packet oriented transmission three-fold.  Mobile Internet access  Mobile Office  Field sales/service  Wireless access to databases

24. Application cont  Electronic commerce: Point of sale Electronic banking Electronic cash Electronic payment  Messaging  Fleet management  Road guide systems  Security/supervisory systems

25. Application cont Reservation system (e.g. hotel, theater, flights) Highway charging systems Location based info service Video telephony Telescoping

26. Conclusion EDGE paves the way into mobile multimedia applications whilst offering the maximum of investment protection:  No need for new network elements Low risk of investment thanks to the dual mode of GSM/EDGE (Slot by slot)

27. Conclusion cont 1. Smooth evolution path 2. Supporting same type of services as GPRS but with higher data rates of more than 400 kbit/s 3. Use of GSM spectrum, bandwidth, protocol, carrier structure and cell planning process i. Additional step towards UMTS –enables smooth network evolution ii. New business opportunities in a market with tremendous growth potential iii. Better ratio of cost to bandwidth

28. THANK YOU THANK YOU FOR YOUR PRECIOUS TIME