No abstract

A wireless sensor network (WSN) is a distributed system that comprises thousands of sensor nodes and a sink. The sensor nodes communicate with other sensor nodes by using broadcast in the WSN and this leads to a severe problem. Hence many researchers proposed cluster schemes to prevent the broadcast storm. Cluster-based wireless sensor networks (CWSNs) have been studied more recently. In order to increase the capability of the fault-tolerance and reliability of CWSNs, the Byzantine agreement problem is revisited. A protocol for achieving the task of agreement between nodes in a CWSN is proposed in this paper. The proposed protocol is referred to as the optimal agreement protocol and is demonstrated to make each healthy node reach an agreement value to cope with the influence from faulty components in the CWSN.