Energy-efficient Time Synchronization for Self Reclustering Mechanism in Heterogeneous Wireless Sensor Networks

摘要

In Heterogeneous wireless sensor networks, scalability is one of the basic concerns, because of the huge number of sensor nodes with limited battery power at each and every node. Suppose if the huge number of sensor nodes are dynamically deployed in the network maintenance of the synchronization between the nodes is not so easy and also it effects the scalability metric. The synchronization protocol ensures that synchronization reliability does not degrade significantly when large numbers of sensor nodes are deployed. The goal of this protocol is to maintain a unique global time slot by creating self re-clustering hierarchical topology in a wireless sensor network. A Cluster head in the topology will act as synchronization head to the cluster member. The importance of this mechanism gaining and manage the effective synchronization at a large scale cluster based network when cluster head losses its local synchronization due to physical disturbances or energy depletion rather than small cluster nodes lying in a neighborhood. The proposed re-clustering works in three phases: setup phase, synchronization phase and re-clustering phase.