Integrated Clock Synchronization Scheme in Wireless Sensor Networks

Aiming at the problems that for the existed synchronization schemes in Wireless Sensor Networks(WSNs) have a main drawback that they only correct the clock offset,a novel clock synchronization scheme is proposed to integrate clock offset synchronization and clock rate synchronization.In this scheme,single-hop synchronization is based on three consecutive message transmissions,and multiple-hop synchronization is based on a layered spanning tree.Simulation experimental results show this scheme can achieve longer resynchronization period and less synchronization error than existed ones.