Enhanced Indirect-Broadcasting Synchronization Protocol for Wireless Sensor Networks

摘要

Time synchronization in Wireless Sensor Networks (WSN) is critical to many WSN applications. A new time synchronization protocol for WSN called Indirect-Broadcast Synchronization (IBS) has been already proposed. As the protocol operates in cluster tree topology, network lifetime may be shortened mainly by cluster head node[s] (called as a Leader Node in IBS), which consumes more power than cluster member (i.e. non-leader) nodes usually. In this paper, we propose enhanced version of IBS (called EIBS) which saves overall energy and prolongs network lifetime by re-constructing partial cluster tree locally. Compared with other tree construction approaches, this tree reconstruction algorithm is not only simpler, but also more efficient in the light of overall power consumption and network lifetime.