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Research On Key Energy-efficient Routing Technology Of WSN Based On Cluster

Posted on:2016-09-11Degree:MasterType:Thesis
Country:ChinaCandidate:J P ShaoFull Text:PDF
GTID:2308330464967812Subject:Computer application technology
Abstract/Summary:PDF Full Text Request
Wireless sensor network(WSN) is a wireless network which is composed of a large number of sensor nodes which are self-organized and connected with each other in the manner of multi-hop. The nodes perceive, acquire, process and transmit information of the targets in the monitored field collaboratively and send these information to the manager of the network. The technology of WSN is widely used in the area of military, medical and so on. But in WSN, the number of nodes is huge, the energy is limited and the communication bandwidth is small, so how to prolong the network lifetime and guarantee the safe and reliable transmission of information is the primary goal of the design of WSN. And efficient routing protocol can not only find the optimal path and improve the utilization efficiency of nodes’ energy, but also can balance the network load and prolong the network life cycle.Therefore, based on the background of wireless sensor network and the analysis of the characteristics of the clustering wireless sensor network, the existing clustering routing protocols for WSN was studied and an Improved Unequal Routing Protocol(IUCRP) was designed based on unequal cluster, which can reduce the energy consumption of node in WSN, balance the energy consumption of the network and avoid the problem of “single path”, improve the utilization rate of the link and prolong the network life cycle. The achievements obtained are as follows:At first, aiming at the problem of unequal network energy consumption and the shortening of network life cycle which is led by not considering the factors of residual energy and density of the nodes in EEUC(Energy-Efficient Uneven Clustering), EEUC was improved and the IUCRP was designed. IUCRP adopts an improved unequal clustering algorithm, which determines the competition radius of cluster heads according to the comprehensive weights of the distance to the Sink node, residual energy of node and the density of the nodes around to the cluster unequally in order to make the nodes closer to the Sink node can preserve energy for data forwarding and to make the clusters with smaller residual energy, dense nodes around smaller to reduce the energy consumption of cluster head so as to balance network energy consumption and prolong the network life cycle.Secondly, aiming at the problem of large energy consumption caused by long-distance data transmission between clusters in existing WSN routing algorithms based on cluster, in this paper, the inner-cluster and inter-cluster communication strategy and the update mechanism of clusters was designed. The data was transmitted between clusters using relay nodes to avoid too large energy consumption caused by long distance communication and to effectively reduce the energy consumption. At the same time, the next hop was chosen by considering the factors of distance, remaining energy, link cost and link quality overall to refrain from large energy consumption of a single node and effectively increase the link utilization, reduce the packet loss rate in order to achieve the purpose of prolonging the worktime of the network.Finally, the achievement was simulated by using the simulation tool OPNET. The results of simulation shows that compared with EEUC, IUCRP can make the death time of the first nodes delay and extend the network life, reduce the energy consumption of cluster heads in each round and shorten the end-to-end delay of the network.
Keywords/Search Tags:Routing protocol, Unequal clustering, Relay nodes, Link quality, Remaining energy
PDF Full Text Request
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