GSM Vs CDMA - A Comparative Study

Details

Themes: Technology / Benefits and Problems
Period : 1997 - 2003
Organization : -
Pub Date : 2003
Countries : -
Industry : Telecom and Broadband

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Case Code : MISC008
Case Length : 12 Pages
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Setting Up a Call in a GSM Network

When a mobile unit is switched on, it tries to contact a BTS that is within range to log onto the network. The BTS also transmits the frequencies of neighbouring BTSs to the mobile unit so that the unit can determine which BTS it is getting better reception from. The mobile unit transmits the measurements of the different frequencies back to the BTS, which in turn passes this information to the BSC. The BSC has a better view of what is happening in the network. The BSC then lets the phone switch BTSs. For an incoming call, the HLR finds out which VLR knows where the phone is, and the VLR then sends a signal to that particular phone. The mobile unit responds, and the call is set up.

The GSM Family

The GSM family of wireless communication provides several voice and data enabling services. It also provides several enriching features to meet the ever-growing needs of customers world-wide.

The GSM family of wireless communication platforms, apart from today's GSM,¹⁸ consists of GPRS, EDGE and 3GSM. These three basic platforms put together form GSM. (Refer Table I)

Table I
The GSM Family

Basic Platforms	Features offered
General Packet Radio Service (GPRS)	• offer 'always-on', higher capacity, Internet-based content and packet-based data services. • enables services such as colour Internet browsing, e-mail on the move, powerful visual communications, multimedia messages and location-based services.
Enhanced Data rates for GSM Evolution (EDGE)	• enhancements in data capability over the core GSM network • delivery of advanced mobile services such as the downloading of video and music clips, full multimedia messaging, high-speed colour Internet access and e-mail on the move.
3GSM	• makes available third generation mobile multimedia services globally.

Source: www.gsmworld.com

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18] The second generation GSM network which delivers high quality and secure mobile services and data services with full roaming capabilities across the world.