Mobile Networks
...er is valid a message is sent to the corresponding base station and the call is activated. If a user moves from one cell to the other a hand-off occurs. Three strategies have been proposed to detect the need for a handoff: In mobile controlled handoff MCHO the MS continuously monitors the signals of surrounding BS and initiates the handoff process when some of the hand off criteria are met. MCHO is used in DECT and PACS. In network-controlled hand off (NCHO) the surrounding BS s measure the signal from the MS, the network initiates the handoff process when some handoff criteria are met. NCHO is used in CT-@ plus and AMPS. In mobile assisted hand off (MAHO) the network asks the MS to measure the signal from the surrounding BSs. The ne...