Gsm Mobile Communication Technology

www.vadakaranews.com1. HSCSD (High Speed Circuit Switched Data), an enhanced version of the GSM standard, is a circuit switching data service.
Several GSM radio channels are used simultaneously for data transmission in order to achieve higher transmission rates (57kbps)


2. GPRS (General Packet Radio Service) is a packet-oriented data service for data transmission in the GSM network that has been enhanced by including additional infrastructural components. Several radio channels can be bundled together, so that transmission rates of up to 171 kbps ( in practice , approx. 50 kbps ) are theoretically possible.


3. The Third Generation Mobile Communication System UMTS ( Universal Mobile Telecommunications System) is the successor to GSM. Through more powerful radio technology ( including more bandwidth and CDMA transmission methods), any content ( e.g. multimedia application, downloads from the internet, videoconferencing ) can be transmitted at a high transmission rate. This opens the door to a variety of new services in the future.

The data transmission rates specified in the UMTS system range from 144 kbps for the highly mobile user ( maximum speed 500 km/h ) through to 2 Mbps for quasi-stationary operation. UMTS data devices will from the outset be multi-mode capable, i.e. they will also be able to use the GSM network for voice and data connections.

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