Edge technology


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  • Sdsdghh
  • GSM – Global System and Mobile Communications TDMA – Time Division Multiple Access
  • This pictures visually shows the evolution of wireless technology from 2G to 3G and beyond.
  • Edge technology

    1. 1. Welcome By Karthik
    3. 3. History <ul><li>In 1 st G AMPS(Advanced Mobile system) developed in U.S in 1983 </li></ul><ul><li>In 2 nd G there was introduction of CDMA,TDMA and GSM </li></ul><ul><li>Between 2 nd and 2.5 th G of GPRS </li></ul><ul><li>Between 2.5 th and 3 rd G there was an introduction EDGE TECHNOLOGY </li></ul>
    4. 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. 5. Introduction <ul><li>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). </li></ul><ul><li>Transmits data at up to 384 kilobits per second(Kbps) </li></ul>
    6. 6. Topics of Discussion <ul><li>Mobile evolution </li></ul><ul><li>Edge technology </li></ul><ul><li>GPRS </li></ul><ul><li>EDGE system performance </li></ul><ul><li>Channel coding and frame structure </li></ul><ul><li>Applications </li></ul><ul><li>Conclusion </li></ul>
    7. 7. Mobile evolution <ul><li>1 st generation mobile communication </li></ul><ul><li>2 nd generation mobile communication </li></ul><ul><li>2.5 th generation mobile communication </li></ul><ul><li>3 rd generation mobile communication </li></ul><ul><li>3G and above </li></ul>
    8. 8. EDGE Technology <ul><li>Evolutionary path to 3G services for GSM and TDMA operators </li></ul><ul><li>Builds on General Packet Radio Service (GPRS) air interface and networks </li></ul><ul><li>Phase 1 (Release’99 & 2002 deployment) supports best effort packet data at speeds up to about 384 kbps </li></ul><ul><li>Phase 2 (Release’2000 & 2003 deployment) will add Voice over IP capability </li></ul>
    9. 9. <ul><li>Enhanced Data rates for GSM Evolution </li></ul><ul><li>Can increase the capacity and data throughput typically to 3-4-fold over GPRS </li></ul><ul><li>Theoretical maximum speeds of up to 473 kilobits per second (kbps) </li></ul><ul><li>Average recognizable data rates between 80 and 130 kbps </li></ul><ul><li>TDMA carriers must still convert to GSM, then add GPRS before deploying EDGE technology </li></ul>EDGE
    10. 10. 2.5G (Between 2G and 3G) <ul><li>Uses General Packet Radio Services (GPRS) technology. </li></ul><ul><li>GSM and TDMA were enhanced to packet based networks </li></ul><ul><li>GPRS is primarily a simple software upgrade on GSM and TDMA </li></ul><ul><li>Easy for the service providers to update their networks </li></ul>
    11. 11. GPRS <ul><li>Packet based networked over existing circuit switched GSM network. </li></ul><ul><li>GPRS radio resources are used only when users are actually sending or receiving data. </li></ul><ul><li>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. </li></ul><ul><li>Brings desktop experience to wireless such as web browsing and chat. </li></ul><ul><li>Enables file transfer and home automation. </li></ul>
    12. 12. 2.5G characteristics <ul><li>Data rates 64 – 144 Kbps . </li></ul><ul><li>A leap from 9.6kbps of 2G to 64Kbps </li></ul><ul><li>Packet based networks. </li></ul><ul><li>Always-on connectivity. </li></ul><ul><li>Instant messaging + small attachments . </li></ul><ul><li>New wireless standards started emerging. </li></ul>
    13. 13. GPRS shortcomings <ul><li>GPRS packets are sent in all different directions to reach the same destination </li></ul><ul><li>Potential for packet getting lost or corrupted during the data transmission over the radio link. </li></ul><ul><li>Though it incorporates data integrity and retransmission strategies, potential transit delays can occur. </li></ul>
    14. 14. EDGE Technology <ul><li>EDGE – Enhanced Data GSM Environment. </li></ul><ul><li>Developed to increase the bandwidth of GPRS technology. </li></ul><ul><li>EDGE increased the bandwidth of GSM from 144 Kbps to 384 Kbps . </li></ul><ul><li>Migration towards 3G technology started. </li></ul>
    15. 15. Courtesy: http://www.gsmworld.com/technology/index.shtml
    16. 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. 17. EDGE modulations
    18. 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. 19. Some of the generation mobile phones <ul><li>2 nd generation phones </li></ul>
    20. 20. Personal Digital Assistants & 2.5 G phones Wireless via Bluetooth Internet Wireless via GPRS
    21. 21. Combined PDAs and 2.5 G phones
    22. 22. 3 G phones
    23. 23. Applications <ul><li>  </li></ul><ul><li>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. </li></ul><ul><li>         Mobile Internet access </li></ul><ul><li>         Mobile Office </li></ul><ul><li>         Field sales/service </li></ul><ul><li>         Wireless access to databases </li></ul>
    24. 24. Application cont <ul><li>         Electronic commerce: </li></ul><ul><li>Point of sale </li></ul><ul><li>Electronic banking </li></ul><ul><li>  Electronic cash </li></ul><ul><li>Electronic payment </li></ul><ul><li>         Messaging </li></ul><ul><li>         Fleet management </li></ul><ul><li>         Road guide systems </li></ul><ul><li>         Security/supervisory systems </li></ul>
    25. 25. Application cont <ul><li>Reservation system (e.g. hotel, theater, flights) </li></ul><ul><li>Highway charging systems </li></ul><ul><li>Location based info service </li></ul><ul><li>Video telephony </li></ul><ul><li>Telescoping </li></ul>
    26. 26. Conclusion <ul><li>EDGE paves the way into mobile multimedia applications whilst offering the maximum of investment protection: </li></ul><ul><li>    No need for new network elements </li></ul><ul><li>Low risk of investment thanks to the dual mode of GSM/EDGE (Slot by slot) </li></ul>
    27. 27. Conclusion cont <ul><li>1.     Smooth evolution path </li></ul><ul><li>2.     Supporting same type of services as GPRS but with higher data rates of more than 400 kbit/s </li></ul><ul><li>3.     Use of GSM spectrum, bandwidth, protocol, carrier structure and cell planning process </li></ul><ul><li>      i.      Additional step towards UMTS –enables smooth network evolution </li></ul><ul><li>     ii.     New business opportunities in a market with tremendous growth potential </li></ul><ul><li>      iii.      Better ratio of cost to bandwidth </li></ul>