Abstract:

A multievent cluster data failure tolerance schema called MEDFT is proposed for wireless sensor networks, based on the tradeoff achieved by failure tolerance and energy efficiency in event clusters. For this schema, the paper firstly develops a distributed clusterheader election method by calculating the product of both node residual energy and node confident rate. Secondly, it puts forward a node disposal policy for the nodes deployed in the multievent wrapped area, and finally, it establishes a compensation mechanism of multievent cluster data failure tolerance. The simulation results demonstrate that the multievent cluster with MEDFT can significantly increase the network survival period, and obtain event values with less errors and greater data failure tolerance, compared with other algorithms.

Key words: multievent cluster;data failure tolerance;energy efficiency