Presentation is loading. Please wait.

Presentation is loading. Please wait.

NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI200117284 1 TECHNICAL SEMINAR PRESENTATION Presented by NISHITH RANJAN SAHOO Roll no:

Similar presentations


Presentation on theme: "NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI200117284 1 TECHNICAL SEMINAR PRESENTATION Presented by NISHITH RANJAN SAHOO Roll no:"— Presentation transcript:

1 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI TECHNICAL SEMINAR PRESENTATION Presented by NISHITH RANJAN SAHOO Roll no: EI Under the Guidance of MIGRATION OF GSM TO GPRS Dr. Partha S. Mallik

2 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS (General Packet Radio Service) Reuse the existing GSM infrastructure Introduce packet-switched routing functionality Better data transfer rates Low cost and connectivity-oriented Migration Path to 3G Networks Always on / always connected INTRODUCTION MIGRATION OF GSM TO GPRS

3 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI NEED FOR GPRS Existing Cellular networks have problems: Data Rates too slow – about 9.6 kbps Connections setup too long & complicated Proves expensive for bursty traffic utilization Inefficient resource utilization for bursty traffic No efficient method for packet transfers MIGRATION OF GSM TO GPRS

4 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI PACKET-SWITCHED TECHNIQUE VS. CIRCUIT-SWITCHED In circuit-switching, resources (e.g. a channel) are allocated to user for duration of connection Inefficient use of resources User pays for the whole connection High QoS: channel maintains real-time connection In packet-switching, resources are allocated to user only for the time it takes to send each packet A channel can serve many users User pays by the packet Ideal for bursty data connections MIGRATION OF GSM TO GPRS

5 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS ARCHITECTURE GPRS = GSM + packet switching. GPRS has the features of a real data network. Speeds up to 190 kbps (theoretical maximum). No dial-up modems needed, but direct connections. Billing based on sended/received bits, no telephone ticks. All applications available (www, , ftp,..). The setup time is negligible – less than a second. MIGRATION OF GSM TO GPRS

6 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS ARCHITECTURE How is the high speed of GPRS realized? Dynamic assignment of bursts to a user. In GSM 1 burst per user. In GPRS theoretical maximum of 8 bursts per user. 000Data: 57 bits11 Sync: 26 bits Data: 57 bits 000 MIGRATION OF GSM TO GPRS

7 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI MIGRATION FROM GSM TO GPRS The migration path from GSM to GPRS requires: Additional packet switching nodes (routers between the base stations and the mobile switch center). The existing GSM nodes to be upgraded with GPRS functionality. Commercial data services to be provided for this a GPRS operator needs to deploy other elements like Access servers and Firewalls. MIGRATION OF GSM TO GPRS

8 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS ENVIRONMENT MIGRATION OF GSM TO GPRS

9 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS ARCHITECTURE : MOBILE STATION GPRS MS includes two components: MT (Mobile Terminal). Typically a handset used to access the radio interface. TE (Terminal Equipment). Typically a laptop or a Personal Digital Assistant (PDA). Three types of MS: Class-A: Could be attached to both GPRS and other GSM services, and the MS supports simultaneous operation of GPRS and other GSM services. Class-B: Could be attached to both GPRS and other GSM services, but the MS can only operate one set of services at a time. Class-C: Could be exclusively attached to one service type at a given time. MIGRATION OF GSM TO GPRS

10 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS Architecture Interfaces TEMTBSSSGSNGGSN PDN TE MSC/VLRHLR SGSN CGF EIR Billing System Other PLMN GGSN RUm A Gs D Gr Gc GbGnGi Gn Gp Gf Ga CGF(Charging Gateway) MIGRATION OF GSM TO GPRS

11 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI SGSN – SERVING GPRS SUPPORT NODE At the same hierarchical level as the MSC. Transfers data packets between mobile stations and GGSNs. Keeps track of the individual MSs location and performs security functions and access control. Detects and registers new GPRS mobile stations located in its service area Participates into routing, as well as mobility management functions. MIGRATION OF GSM TO GPRS

12 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GGSN – GATEWAY GPRS SUPPORT NODE Provides inter-working between PLMN and external packet-switched networks. Converts the GPRS packets from SGSN into the appropriate packet data protocol format (e.g., IP or X.25) and sends out on the corresponding packet data network. Participates into the mobility management. Maintains the location information of the mobile stations that are using the data protocols provided by that GGSN. Collects charging information for billing purpose. MIGRATION OF GSM TO GPRS

13 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS ARCHITECTURE:BACKBONE NETWORK Tunnels of data and signaling messages between GPRS support nodes.Protocol architecture based on the Internet Protocol (IP). GTP (GPRS Tunneling Protocol) used to tunnel user data and signaling between GPRS Support Nodes. Two kinds of GPRS backbone Network: Intra-PLMN backbone network: The IP network interconnecting GSNs within the same PLMN. Inter-PLMN backbone network: The IP network interconnecting GSNs and intra-PLMN backbone networks in different PLMNs. Border Gateway handles the packet transfer between GPRS PLMNs. MIGRATION OF GSM TO GPRS

14 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI GPRS ARCHITECTURE: BACKBONE NETWORK Inter-PLMN Backbone Packet Data Network Intra-PLMN Backbone GGSNBG SGSN BGGGSN SGSN Gi Gp MIGRATION OF GSM TO GPRS

15 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI PACKET TRANSFER MIGRATION OF GSM TO GPRS

16 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI PLMN1 PLMN2 MS BTS BSC SGSN Gn Intra-PLMN GPRS Backbone Gn SGSN GGSN Gi Packet Data Network(PDN) Eg.Internet,Intranet Border Gateway Gp Inter-PLMN GPRS Backbone Border Gateway Intra-PLMN GPRS Backbone GGSN Router Host SGSN BSC BTS MIGRATION OF GSM TO GPRS

17 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI MOBILITY MANAGEMENT Mobility management is the means by which GPRS keeps track of a mobile subscriber location while connected to the Network. Main concepts : GPRS mobility management states GPRS network access. Attachment. Location management Packet Data protocol PDP context Detachment MIGRATION OF GSM TO GPRS

18 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI MOBILITY MANAGEMENT STATES Explicit Detach IDLE READY STANDBY GPRS Attach GPRS Detach Timer expiry/ Force STANDBY/ Abnormal RLC condition PDU Transmission /Reception reachable mobile unreachable mobile MIGRATION OF GSM TO GPRS

19 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI CONCLUSION The GPRS should cost uses less than circuit-switched services since communication channels are being used on a shared basis and also the packets are need-based rather than dedicated only to one user. The next stepping stone would be moving towards 3G by implementing EDGE (Enhanced Data rates for Global Evolution), The GPRS is the key transition phase and is a fundamental requirement for Third Generation Mobile Communications. MIGRATION OF GSM TO GPRS

20 NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI THANK U !!!!!!!!!!!!! MIGRATION OF GSM TO GPRS


Download ppt "NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY Nishith Ranjan Sahoo EI200117284 1 TECHNICAL SEMINAR PRESENTATION Presented by NISHITH RANJAN SAHOO Roll no:"

Similar presentations


Ads by Google