Research Of Clustering Routing Protocol Based On Energy For WSN

There is serious energy limited in wireless sensor network, therefore, WSN has the important challenge that to design routing protocol of high energy efficiency in order to prolong the network lifetime. Clustering routing technology is better for increasing utilization of energy and scalability for WSN. However, in clustering routing protocol, when cluster heads transmit date to BS via multi-hop communication, due to cluster heads closer to BS have a higher load of relay traffic and consume more energy. Consequently, they will die much faster than the other cluster heads, it easy leads to energy consumption unbalanced among cluster heads and reduces the network lifetime. Meanwhile, because the different node distributed density in different area may lead to different cluster members in clusters. Consequently, it also to cause energy consumption unbalanced among cluster heads. In addition, if the node having lower energy is still selected cluster head ,it will have a higher energy-load. Therefore, it is essential that to consider energy-load of nodes and balance energy consumption when design clustering routing protocol.From overall network, to aim at all above problem and absorb excellent idea from some clustering routing. An overall energy-balanced clustering routing protocol algorithm is proposed. It named as OEBCR. In the cluster forming phase, OEBCR adopt thought of unequal clustering size. According to different distances and node distributed density, tentative cluster heads construct clusters of unequal size. When tentative cluster heads have similar node distributed density ,the cluster heads closer to BS have smaller size than those farther away from the BS, thus cluster heads closer to the BS can preserve some energy for the inter-cluster date forwarding and balance energy consumption among cluster heads. When tentative cluster heads'distance from BS is similar, the cluster heads having big value of node density function will have smaller size than others, thus cluster heads via reduce cluster members to achieve energy balancing. In competing cluster head, the nodes which have more energy will have more chance to be tentative cluster heads, OEBCR to pull into parameter of energy of neighborhood tentative heads, it avoids the nodes having lower energy being cluster heads. In addition, Inter-cluster multi-hop communication consider nodes'residual energy and energy consumption, cluster heads according value of weight to choose best relay nodes. Finally, via matlab to emulate. Simulation results show that OEBCR effectively balances energy consumption and improves the energy utilization rate among nodes ,it prolongs the network lifetime well.