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An Optimal AgreementOptimal Agreement • June 29th, 2012
Abstract—A Wireless Sensor Network (WSN) is a wireless network consisting of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions. A cluster of sensor nodes in WSN is cooperating to achieve some objectives; each sensor node communicates with other sensor nodes by using broadcast in WSN, but also leads to a severe problem, such as broadcast storm. Many researchers proposed cluster schemes to improve the broadcast storm. However, Cluster-based Wireless Sensor Network (CWSN) has been more important topic than the other topics recently. For CWSN, a stable topology is an important research topic that provides good environment for transmission data. Further, the fault-tolerance and reliability of the CWSN has been an important topic. The problem of reaching agreement in the distributed system is one of the most important issues to design a fault-tolerance system. In previous works, reach a common agreement among healthy nodes to
