GPRS GPRS is a packet-based data bearer service for GSM and TDMA networks. GPRS gives mobile users faster data speeds and is particularly suitable for "busty" Internet and intranet traffic. It makes mobile data faster, cheaper and more user-friendly than ever before. With GPRS-enabled mobile devices, users can be "always on" the Mobile Internet, so that, for example, s arrive instantaneously. It also permits users to receive calls simultaneously when sending and receiving data calls.
Key User Features 1.Speed 2.Immediacy 3.New Application, Better Application 4.Service Access
Key Network Features Packet Switching Spectrum Efficiency Internet Aware Supports TDMA and GSM
GPRS Terminals Three Classes Of Terminals: Class A:supports GPRS and other GSM services (such as SMS and voice) simultaneously Class B terminal can monitor GSM and GPRS channels simultaneously, but can support only one of these services at a time Class C terminal supports only no simultaneous attach. The user must select which service to connect to. Supports manual selection of service.
GPRS Telephones Device Type DescriptionData Transmission Speed Type 2+1 two downlink channels + one uplink data transmission Receive 26.8Kbits and send 13.4Kbits. Type 3+1 three downlink channels + one uplink data transmission Receive 40.2Kbits and send 13.4Kbits. Type 4+1 four downlink channels + one uplink data transmission Receive 53.6Kbits and send 13.4Kbits.
GPRS Architecture Consists Of: Mobile Equipment Base Station Controller Base Transceiver GGSN SSGN
Modifications Required For GPRS GSM Network Element Modification or Upgrade Required for GPRS Subscriber Terminal (TE) A totally new subscriber terminal is required to access GPRS services. These new terminals will be backward compatible with GSM for voice calls. BTSA software upgrade is required in the existing base transceiver site (BTS). BSCThe base station controller (BSC) will also require a software upgrade, as well as the installation of a new piece of hardware called a packet control unit (PCU). The PCU directs the data traffic to the GPRS network and can be a separate hardware element associated with the BSC. Core NetworkThe deployment of GPRS requires the installation of new core network elements called the Serving GPRS Support Node (SGSN) and Gateway GPRS Support Node (GGSN). Databases (VLR, HLR, and so on) All the databases involved in the network will require software upgrades to handle the new call models and functions introduced by GPRS.
Limited Cell Capacity For All Users Speeds Much Lower in Reality Support of GPRS Mobile Terminate by Terminals is not Ensured Sub optimal Modulation Transit Delays No Store and Forward Limitations of GPRS
Chat Textual and Visual Information Still & Moving Images Web Browsing Document Sharing/ Collaborative Working Internet Vehicle Positioning Remote LAN Access File Transfer And Many More………. Applications Of GPRS
Billing Tariff Customer Service Related GPRS Challenges