Abstract: In the randomly deployed wireless sensor networks (WSNs),there may always contain some redundant nodes of coverage and communication,which would not only cause huge waste of energy,but also affect the network’s service quality．Therefore,how to effectively schedule the redundant nodes becomes a heated issue in WSNs．This paper proposed a distributed algorithm for active nodes with communication and sensing coverage in the randomly deployed WSNs (RCSC)．Based on the cellular structure,RCSC optimizes the working set of nodes by adding "bridge nodes" and filling the "sensing hole",in order to ensure "communication coverage" and "sensing coverage" performance of the whole network to be achieved．Finally,combined with LEACH protocol,RCSC can schedule all the nodes dynamically．Simulation shows that in the network topology constructed by RCSC,working nodes are fewer while the network is stable,as a result,it extends the network lifetime by decreasing the extra energy consumption caused by random communications among nodes.

Key words: WSNs,Sensing coverage,Communication coverage,Cellular structure