GPRS

Name: Sanket Chougule

Title: General Packet Radio Service

Company Name: Cubez Technocrats Pvt. Ltd.

Introduction The General Packet Radio System (GPRS) is a new service that provides actual packet radio access for mobile Global System for Mobile Communications (GSM) and time-division multiple access (TDMA) users.The main benefits of GPRS are that it reserves radio resources only when there is data to send and it reduces reliance on traditional circuit-switched network elements.Theoretical up to 171.2 kbps transmission speed are achievable using all eight timeslots at the same time.No dial-up connection is necessary, GPRS facilitates instant connections whereby information can be sent or received.

GPRS fully enables Mobile Internet functionality by allowing interworking between the existing Internet and the new GPRS network.

GPRS Architecture

BTS

BTSMS

BSC GbSGSN

GfGs

Gr

DEIR

MSC/VLR

HLR

Gc

Gn

GGSN Gi PDN

Gp GGSN

Other GPRSPLMN

GPRS Normal Service ProcedureProvision

— GPRS services: Point To Point (PTP) and Point To Multipoint (PTM). — Quality of Service (QoS): 1) priority; 2) reliability; 3) delay; 4) user data throughput; 5)scheduled repeated transmission.

GPRS-Attach and GPRS-Detach— Attach: MS indicates its presence to the PLMN

(public mobile network) or the purpose of using the GPRS services. — Detach: MS indicates to the PLMN that the MS will no longer be using the GPRS services

RegistrationBy registering the service parameters, the

subscriber optimizes the its present, dynamic service profile within the limitations of the static subscription profile.

Erasure The subscriber erases previously registered service parameter values from the service profile.

Interrogation The subscriber interrogates the status/value of

registered service parameters as defined in the current service profile.

Activation The subscriber activates each of the registered

interworking profiles independently within the limitations of the subscription profile.

De-activation The subscriber de-activates the previously activated interworking profiles independently within the limitations of the subscription profile.

Invocation and operation The GPRS service is invoked upon transmission or

reception of GPRS data by subscribers.PIN and Password Management

Correct subscriber identification has been confirmed by entry of the current GSM PIN & GPRS services is offered to a subscriber with the subscription option of using a password.

GPRS Normal Service Procedure

Provision — GPRS services: Point To Point (PTP) and Point To Multipoint (PTM). — Quality of Service (QoS): 1) priority; 2) reliability; 3) delay; 4) user data throughput; 5) scheduled repeated transmission.

GPRS-Attach and GPRS-Detach

GPRS Application

CommunicationsUse the mobile communications network purely as a pipe to access messages or information.

— E-mail; fax; unified messaging; internet accessValue-added services (VAS)

Refer strictly to content provided by network operators to increase the value of their service to their subscribers. — E-commerce; banking; financial trading; Retail; ticket purchasing

Location-based applications Provide the ability to link push or pull information services with a user's location. — Navigation; traffic conditions; airline/rail schedules; location finder

Vertical applicationsApply to systems utilizing mobile architectures to support the carrying out of specific tasks within the value chain of a company. — Freight delivery; fleet management; sales-force automation

Advertising

— Detach: MS indicates to the PLMN that the MS will no longer be using the GPRS services.

— Attach: MS indicates its presence to the PLMN (public mobile network for the purpose of using the GPRS services.

Benefits of GPRSNew Data ServicesHigh Speed (Data Rate 14.4 – 115 kbps)Efficient use of radio bandwidth (Statistical Multiplexing) Circuit switching & Packet Switching can be used in parallelConstant connectivity

Salient Features of GPRSImportant step on the path to 3GStandardized by ETSI GPRS is an overlay network over the GSMProvides Data Packet delivery serviceSupport for leading internet communication protocols Billing based on volume of data transferred Utilizes existing GSM authentication and privacy procedures.

High Data RateGPRS uses radio channel i.e. 200 kHz wideRadio channel carries digital data stream of 271 kbpsThis rate is divided into 8 time slots each carrying 34 kbps per time slotData rate 14 kbps per time slot achieved after correctionsGPRS can combine up to 8 time slots giving data rate of 114 kbps

GPRS Terminals

Class AMS supports simultaneous operation of GPRS and GSM services

Class BMS able to register with the n/w for both GPRS & GSM services simultaneously. It can only use one of the two services at a given time.

Class CMS can attach for either GPRS or GSM services

GPRS Network ElementsGPRS Architecture is same as GSM except few hardware modifications

GPRS includes GSNs GGSN : Gateway GPRS Support Node SGSN : Serving GPRS Support Node

GPRS Register

THANK YOU…