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Gprs ppt

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  • 1. Prepared by: Tanmoy Surul
  • 2. Wireless raodmap
  • 3. What is GPRS General Packet Radio Service • General -> not restricted to GSM use (DECT ?, 3rd generation systems ?) • Packet Radio -> enables packet mode communication over air • Service, not System -> existing BSS (partially also NSS) infrastructure is used Main benefits • Resources are reserved only when needed and charged accordingly • Connection setup times are reduced • Enables new service opportunities
  • 4. GPRS characteristics GPRS uses packet switched resource allocation • resources allocated only when data is to be sent/received Flexible channel allocation • one to eight time slots • available resources shared by active users • up and down link channels reserved separately • GPRS and circuit switched GSM services can use same time slots alternatively Traffic characteristics suitable for GPRS • Intermittent, bursty data transmissions • Frequent transmissions of small volumes of data • Infrequent transmission of larger volumes of data
  • 5. GPRS Applications • Standard data network protocol based IP based applications WWW, FTP, Telnet, ... Any conventional TCP/IP based applications X.25 based applications Packet Assembly/Disassembly (PAD) type approach • GPRS specific protocol based Point-to-point applications Toll road system, UIC train control system Point-to-multipoint applications Weather info, road traffic info, news, fleet management • SMS delivery (GPRS as a bearer for SMS)
  • 6. How to make money with GPRS?  New users  More subsribers  New services  New ways to get money from users  New intances to pay instead of the users (e.g. advertisers)  New applications  New ways to get money from users  More data traffic  More data traffic  Small payments per packet, but huge number of packets
  • 7. GPRS Architecture BTS BTS MS BSC Gb SGSN Gf Gs Gr DEIR MSC/VLR HLR Gc Gn GGSN Gi PDN Gp GGSN Other GPRS PLMN
  • 8. Users' benefits of GPRS  GPRS Selling arguments:  Higher capacity Internet access  Up to 171,2 kbps in theory, 40 kbps in practice  Quicker access to Internet  No set up time, Iternet access all the time available  Lower cost  Flat rate or volume based billing  Or no cost  via anonymous access (somebody else pays the bill)
  • 9. Conclusion  GPRS provides efficient access to Packet Data Networks.  Multislot operation in GPRS leads to efficient channel utilization.  GPRS is more effective for long data packet transmission than short ones.