Control channels: It is defined as the radio channel used for the transmission of beacons such as call set up, call request, call initiation etc.

Mobile station: It is defined as a station in the cellular radio service which is used when in motion at an unspecified location. Mobile stations may be held-held personal units (portables) or installed in vehicles (mobiles).

Mobile Switching Centre (MSC): The MSC co-ordinates the activities of all the base stations and connects the entire cellular system to the PSTN. a typical MSC handles 100,000 cellular subscribers and 5,000 simultaneous conversations at a time, and accommodates all billing and system maintenance functions as well. Communication between the BS and mobile is defined by a standard common air interface (CAI) that specifies four different channels.

Cell spitting: Cell spitting is the process of subdividing a congested cell in to smaller cells, each with its own base station and corresponding reduction in antenna height and transmitter power.