Research On Low Energy Efficient Routing Protocol For WSN

Sensor Technology, Computer Network Technology, embedded systems and Wireless communication technology are relatively mature technology. Wireless sensor network(WSN)technology is developed on the basis of the m.The information can be perceived and collected by the network,and they will be sent to the terminal after processed.WSN is appeared In all walks of life. Wireless sensor network sensor nodes are usually powered by a battery,once the battery is depleted,the nodes will die, the network lifetime and network quality of service will decline sharply. Therefore,how to increase the lifetime of the network is the core of study WSN.Due to the energy utilization rate and communication quality of WSN are not high,this article presents a highly efficient low-power WSN routing protocols. The focus of the study are as follows:(1) Due to the initial energy, communications and computing power of each node are typically not the same, the role of nodes are different, and the energy consumption are not the same,therefore, this article considers the residual energy of nodes, node density, the transfer packet success rate and other factors in the cluster head election phase.(2)This article presents a hybrid routing communication scheme in Intra-cluster communication. Whether it is a single-hop or multi-hop scheme program,there are shortcomings, in single- hop scenario, the cluster head far away from the sink node will consume more energy, in a multi- hop scenario, the cluster head near to the sink node will consume more energy. Based on this, This article makes full use of the strengths of single-hop and multi-hop, we propose a hybrid routing communication scheme.(3)Inter-cluster communication in the chain heads selection consider four aspects: the energy value of chain head, chain data transmission cost, success rate of transporting packets and the distance between chain head and the base station.(4)this article presents a strategy of discarding the packet. Due to noise, attenuation, reflection usually interference WSN and network communication resource is limited which will inevitably lead to fierce competition,the data can not be transported Reliable and timely. Therefore, when it detects congestion occurred,WSN takes the strategy of discarding the packet. the order of discarding the packet is depending on the residual value of the packet, discard the packet which residual value is least. This strategy can make full use of the limited bandwidth and improves communication quality sharply.Simulation under the environment of O mnet++ proves that compared with LEAC H and PEGASIS, the algorithm can increase data receiving rate, improve communication quality and effectively extend the network life cycle.