Gprs architecture ppt
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GPRS is a packet-based mobile data service on GSM networks. It provides higher speed data transmission than previous GSM data services. The GPRS architecture introduces two new network nodes - SGSN and GGSN. SGSN handles mobility management and packet transmission between MS and GGSN, while GGSN connects the GPRS network to external packet networks like the Internet. GPRS enhances the GSM network by allowing dynamic allocation of bandwidth and intermittent data transmission, making it suitable for bursty, low-volume data applications.
Gprs architecture ppt
- 2. Content What is GPRS? Characteristics of GPRS GPRS Architecture Support nodes of GPRS Network Enhancements GPRS interface Security
- 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
- 6. 4 GATEWAYSUB SYSTEM 3 RADIO SUB SYSTEM 2 NETWORK SUBSYSTEM 1 BASE STATION SUB SYSTEM BTS 1 BTS 2 BSC 1 BSC 2 MSC VLR SGSN TO A NO OF BSC EIR HLR MS 1 MS 2
- 7. GPRS Architecture.. Uses gsm architecture+ gsn(gprs support nodes) Sgsn (servicing gsn) Ggsn ( gateway gsn) Uses packet switching Faster than gsm and cdma Enable simultaneous transmission of packets SGSN and GGSN will be explain in next slide
- 8. GPRS support nodes There are two network nodes use to offer packet data service called GPRS support nodes 1) Serving GPRS Support Node (SGSN) 2) Gateway GPRS Support Node (GGSN)
- 9. Serving GPRS Support Node(SGSN) Serving GPRS Support Node(SGSN) is one of the GPRS support node Routing the packet switched data to and from the ms Mobility management Location management Authentication and charging for calls Stores the location information of the user User’s profile
- 10. Gateway GPRS Support Node(GGSN) Provide a gateway b/w gprs & pdn Convert data from sgsn to pdp format( packet data protocol) Store the current sgsn address Stores the location of user in its location register Perform authentication & charging functions
- 12. Base Station System(BSS) BSS system needs to enhancement to recognize and send packet data. BSS includes BTS and MS. Network Subsystem(NSS) It consist of a number of sgsns Also consist of a number of msc helps in – authentication, operation & maintenance of subsystems
- 13. SIM ME BTS BTS BSC BSC HLR HLR HLR HLR MSC SGSN GGSN PSTN, ISDN, PSPDN CSPD N BSS NSS
- 14. RADIO STATION SUBSYSTEM Consist of a number of ms, bts & bsc’s Ms having gprs capability Stores a cksn( cipher key sequence number – a logical identity) GATEWAY SUBSYSTEM Consist of sgsn & ggsn Provide connections to other networks & pda Pda – public data network
- 15. GPRS other components Home Location Register(HLR): registers user profile and responds to queries from GSNs . Mobile Station(MS): it is the mobile phone or device SMS Nodes: used for sms transmission via the SGSN
- 16. Acronyms GPRS – GENERAL PACKET RADIO SERVICE MS – MOBILE STATION BTS – BASE TRANCEIVER STATION BSC – BASE STATION CONTROLLER MSC – MOBILE SERVICES SWITCHING CENTER HLR – HOME LOCATION REGISTER AUC – AUTHENTICATION CENTER EIR – EQUIPMENT IDENTITY REGISTER VLR – VISITOR LOCATION REGISTER
- 17. 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.
- 18. References Mobile Computing by Ashoke k Talukder http://www.tutorialspoint.com/gprs/gprs_architectur e.html Mobile Communications by Jochen Schiller