An Energy-Efficient Routing Protocol For Wireless Sensor Network

When"Ubiquitous Computing"is advocated today,wireless sensor network(WSN)is used as a new way of getting information. Sensor nodes are distributed to some places where are so dangerous that human can't reach. The sensor nodes in WSN play the role of observing and transmitting. Although WSN has a bright future,it has not been widely used. It's not easy to design the network because of WSN's special characteristics,such as large amounts of nodes,frequent topology changes, limited energy and memory. As a result,the traditional network technologies are not suitable for WSN. So we demand a serious of special protocols for WSN. Routing protocol of WSN is designed to balance the total energy consuming, whichis the most important performance indicator. There are various kinds of WSN routing protocols for different environments. They can be divided into two groups,the hierarchical routing protocol and the plane routing protocol. Generally,the hierarchical routing protocol has a longer lifetime,and its nodes die stochastically.LEACH is an important hierarchical routing protocol. It changes the cluster head periodically with the intention of saving energy. But it has disadvantages in the clustering policy that brings on inappropriate cluster structure. CCRP introduces a clustering policy based on candidate and a multi-frames data transferring policy based on forecast to resolve the problem. The simulation result proves that CCRP is effective.