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Edge technology
 

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 Edge technology Presentation Transcript

  • Welcome By Karthik
  • EDGE TECHNOLOGY AN EVOLUTION IN MOBILE TECHNOLOGY
  • 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
  • Then Came Digital……….. AMPS CDPD 1G 2G CDMA TDMA GSM IDEN 2.5G GPRS 1XRTT 3G 1X-EVDO EDGE WAN LAN 802.11
  • 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)
  • Topics of Discussion
    • Mobile evolution
    • Edge technology
    • GPRS
    • EDGE system performance
    • Channel coding and frame structure
    • Applications
    • Conclusion
  • 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
  • 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
    • 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
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • Courtesy: http://www.gsmworld.com/technology/index.shtml
  • 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) % %
  • EDGE modulations
  • 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
  • Some of the generation mobile phones
    • 2 nd generation phones
  • Personal Digital Assistants & 2.5 G phones Wireless via Bluetooth Internet Wireless via GPRS
  • Combined PDAs and 2.5 G phones
  • 3 G phones
  • 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
  • Application cont
    •          Electronic commerce:
    • Point of sale
    • Electronic banking
    •   Electronic cash
    • Electronic payment
    •          Messaging
    •          Fleet management
    •          Road guide systems
    •          Security/supervisory systems
  • Application cont
    • Reservation system (e.g. hotel, theater, flights)
    • Highway charging systems
    • Location based info service
    • Video telephony
    • Telescoping
  • 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)
  • 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
  • THANK YOU THANK YOU FOR YOUR PRECIOUS TIME