GPRS
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Data communication and Networking - GPRS
The General Packet Radio Service (GPRS) is a non-voice mobile data network technology developed by the GSM standards body that is an extension of the standard GSM network infrastructure. GPRS offers a faster transmission rate (9.6~115kbps) by utilising the radio bandwidth more efficiently, enabling users to use both voice calls and data transmission simultaneously. The overall radio bandwidth remains the same; it is simply shared between voice and data users. GPRS is a connectionless packet data service that provides extra functionality (compared to standard GSM) such as IP based data transfer, similar to that of the Internet.
GPRS works by overlaying a packet based interface over the traditional circuit switched method. This technique involves splitting the data stream into smaller pieces, sending them over the network and then reassembling them at the receiving end. This means that individual users only use radio bandwidth when they are sending and receiving data. Also unlike GSM, which used one dedicated channel for data transfer, GPRS can facilitate multiple users on the same channel. This efficient use of resources the same bandwidth can be shared by large numbers of GPRS users and there is less need to accommodate for 'idle capacity' that is only used in peak hours...