Abstract:

On the basis of the amount of power held, the sensor nodes can realize time synchronization in limited communication domains.Namely,according to monitoring TPSN synchronization beacons that is for synchronization exchanges between low-energy nodes, the high-energy nodes can achieve the Receiver-Only time synchronization mode. And through citing the Kalman filter method in this mode to optimize the synchronous node′s clock deviation, the synchronization error rate can be effectively decreased. Experimental simulation shows that this synchronization protocol, compared with the TPSN synchronization algorithms, greatly improves the synchronization accuracy.

Key words: wireless sensor networks; time synchronization; TPSN algorithm; Kalman filter