SEMINAR ON “ GPRS “

GPRS- General Packet Radio Service provides a direct link into the Internet from a GSM phone

INTRODUCTION TO GPRS

GPRS will undoubtedly speed up a handset's Internet connection - but it remains to be seen exactly how much speed can be achieved out of the system . GPRS works by aggregating a number of separate data channels. This is possible because data is being broken down into small 'packets' which are re-assembled by the receiving handset back into their original format.

INTRODUCTION (cont…)GPRS stands for General Packet Radio Service , and is a relatively low cost technology that offers packet-based radio service and allows data or information to be sent and received across mobile telephone networks. GPRS provides a permanent connection where information can be sent or received immediately as the need arises, subject to radio coverage.

GPRS ARCHITECTURE

GPRS Subscriber Terminals GPRS BSS GPRS Networks Node GPRS Mobility Management

GPRS SUBSCIBER TERMINALSNew terminals are required because existing GSM phones do not handle the enhanced air interface, nor do they have the ability to packetize traffic directly.

A variety of terminals will exist, as described in a previous section, including a high-speed version of current phones to support high-speed data access.

BACK

GPRS BSSEach BSC will require the installation of one or more PCUs and a software upgrade. The PCU provides a physical and logical data interface out of the base station system (BSS) for packet data traffic.

The BTS may also require a software upgrade, but typically will not require hardware enhancement.

BACK

GPRS NETWORKS NODEIn the core network, the existing MSCs are based upon circuit-switched central-office technology, and they cannot handle packet traffic. Thus two new components, called GPRS Support Nodes, are added:

Serving GPRS Support Node (SGSN) Gateway GPRS Support Node (GGSN)

BACK

GPRS MOBILITY MANAGEMENT

Mobility management within GPRS builds on the mechanisms used in GSM networks.

As a MS moves from one area to another, mobility management functions are used to track its location within each mobile network.

WORKING OF GPRS

Each voice circuit in GSM transmits the speech on a secure 14kbps digital radio link between the mobile phone and a nearby GSM transceiver station.

The GPRS service joins together multiple speech channels to provide higher bandwidth data connections for GPRS data users. The radio bandwidth remains the same, it is just shared between the voice users and the data users.

WORKING-RADIO INTERFACEEach GSM radio transceiver uses Time Division Multiplexing to deliver eight voice circuits on one radio channel. Maximum numbers are limited by many factors including - operators radio license, interference with other nearby GSM cells, cost of equipment, capacity of radio site infrastructure etc. Each 14kbps channel may be shared by multiple 'connected' GPRS users.

RADIO INTERFACE (cont…)As a user's data requirements grow, they will use more of the available capacity within that timeslot

GPRS MOBILE DEVICES

The key use for GPRS is to send and receive data to a computer application such as Email, web browsing or even telemetry.

To use GPRS the service is 'dialed' in a similar manner to a standard data call at which point the user is 'attached' and an IP address is allocated.

GPRS MOBILE DEVICES(cont…)

The three standard methods to connect your computer to GPRS mobile phone are:

1… Infrared 2… Data-cable3… Bluetooth

GPRS Roaming

In the short term don't expect to be able to roam to many countries with GPRS, many networks are still negotiating to set up roaming agreements. Technically there are two type of GPRS Roaming

1… Home Network Roaming 2… Local Network Roaming

GPRS SECURITY The radio interface is considered to be relatively secure being controlled by the GSM network's security - (SIM card + HLR). Security issues arise when data needs to leave the GPRS network to be delivered to either the Internet or a company LAN.

Internet connectivity is the cheapest and most common - and here you can take charge of security by encrypting sensitive data.

FEATURES OF GPRS

Key User Features of GPRS

Key Network Features of GPRS

KEY USER FEATURES OF GPRS

Speed… Immediacy… New and Better Applications…Service Access…

KEY NETWORK FEATURES OF GPRS

Packet Switching… Spectrum Efficiency… Internet Aware… Supports TDMA and GSM…

APPLICATIONS OF GPRSE-Commerce Banking Financial TradingUnified Messaging

GENERAL APPLICATIONS OF GPRS

Communications—E-mail and fax; Intranet/Internet access Value-added services (VAS)—Information services; games E-commerce—Retail; ticket purchasing; banking; financial trading Location-based applications—Navigation; traffic conditions; airline/rail schedules; location finderVertical applications—Freight delivery; fleet management; sales-force automation Advertising

ADVANTAGES OF GPRSGPRS will enable a variety of new and unique services to the mobile wireless subscriber. These mobile applications contain several unique characteristics that enhance the value to the customers. First among them is mobility—the ability to maintain constant voice and data communications while on the move. Second is immediacy, which allows subscribers to obtain connectivity when needed, regardless of location and without a lengthy login session. Finally, localization allows subscribers to obtain information relevant to their current location

LIMITATIONS OF GPRSLimited Cell Capacity for All Users Speeds Much Lower in Reality Support of GPRS Mobile Terminate by Terminals is Not Ensured Suboptimal Modulation Transit Delays No Store and Forward

CONCLUSION From this we can conclude that E-Commerce,Banking ,Financial Trading, Unified Messaging are the fields where GPRS is very much advantageous.

But the areas like limited cell capacity,lower speeds,and other certain limitations are the areas where it needs to improve.

CONCLUSION (cont…)

GPRS is classified as a 2.5G (or 2G Plus) technology because it builds upon existing network infrastructure

In order to compete with 3G, EDGE must offer links running at 384 Kbit/s and originally this equated to running GPRS three times faster. However, because GPRS has proved much slower than expected, it now needs to be seven times faster.

QUERIES, IF ANY ???

THANK YOU !!!

SEMINAR ON GPRS

PREPARED BY:

DHAVAL PATEL