Mobility

Scanning: This is a process in which, BS allocates time for each MS to monitor and measure the radio condition of the neighboring BSs. and the time allocated to each MS is called the scanning interval. Each scanning intervalis followed by an interval of normal operation, referred to as the interleaving interval

In order to start the scanning process, the BS issues a MOB_SCN-REQ message that specifies to the MS the length of each scanning interval, the length the of interleaving interval, and the number of scanning events the MS is required to execute

The identity of neighboring BSs and the frequencies that a MS is required to scan are provided in the MOB_NBR-ADV message sent over the broadcast channel

During a scanning interval, the MS measures the received signal strength indicator (RSSI) and the signal-to-noise-plus noise ratio (SINR) of the neighboring BS and it sends MOB_SCN_REP message to serving BS