HANDOFF MECHANISM IN CELLULAR NETWORK :
Cellular systems require handover procedures, as single cells do not cover the whole service area. It can only upto 35Km around each antenna on the countryside and some hundred meters in cities.
There are 2 basic reasons for handover-
Ø The mobile station moves out of the range of a BTS or a certain antenna. Then the received signal level decreases continuously until it falls below the minimum requirements for communication.
Ø Load balancing:-if the traffic in one cell is too high then shift some MS to other cells with a lower load.
CELLULAR SWITCHING EQUIPMENT :
} Switching Equipment is the brain of the cellular system
} It consists of two parts : the switch and the processor
} The processor controls all the functions that are specific for cellular systems viz. frequency assignment, decisions regarding handoff and monitoring of traffic
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