Abstract:

The requirement of clock synchronization cannot be met in realtime application based on the timing synchronization function(TSF) of IEEE 802.11 WLAN, which uses offset compensation as the clock synchronization protocol. This paper introduces a continuous clock synchronization algorithm (CCSA) based on the beacon value of WLAN to realize master/slave clock synchronization. The proposed algorithm has the advantages of high synchronized precision, continuous tracking, beacon delay and losing tolerance.

Key words: WLAN; beacon; continuous clock synchronization; least square; fault tolerance