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The Research About Routing Protocols Based On Wireless Sensor Network

Posted on:2010-06-29Degree:MasterType:Thesis
Country:ChinaCandidate:Y W QiaoFull Text:PDF
GTID:2178360275977949Subject:Control theory and control engineering
Abstract/Summary:PDF Full Text Request
As one of the ten high technologies in the future, wireless sensor network is attracting more and more important attention in the research field. In recent years,with rapid development of digital circuit, wireless communications and Micro Electro Mechanism Systems, the wireless sensor network which based on these technologies become the hot field. It also dominates the application markets of military, health, and domestic usages etc.In this paper, firstly the main features of wireless sensor network is introduced. some comparisons of the wireless sensor network and traditional wireless network are also given, and several important parameters of the wireless sensor network is introduced. To determine whether the wireless sensor network is efficient or not, energy consumption is the most important index. In order to increase the performance of the wireless sensor network and improve the validity of the energy, energy consumption of the network should be decreased. Secondly, both of the system architecture and the corresponding protocol in OSI layers are described,and then several traditional network routing protocols are enumerated, are also compared and analysised. After that, a dynamic clustering Wireless Sensor Network Routing protocol algorithm which based on energy threshold is presented in this paper. This novel Routing protocol is the improvement of Low-Energy Adaptive Clustering Hierarchy protocol algorithm. The operation of the new protocol is divided into rounds, and every round is divided into three phase as follows: Set-up Phase, Steady-state Phase, and Dynamic- reorganization phase, after some time of running, because of cluster managing, data-fusing, and sending information to the Sink, some Cluster Head consumes a lot of energy. In the protocol of LEACH, the election of cluster head is stochastic and equal and have nothing to do with the energy remained. Once the node with lower energy remained is elected to be cluster head, its energy will exhaust soon and the cluster will invalid. And then, the next round election will carried out. But the frequent cluster head election also consume a lot of energy. In order to solve the problem, this paper do some improvement of LEACH:When the remained energy of the Cluster Head is less than the energy threshold, the Cluster Head will choose a node of its cluster whose remained energy is the most and the Cluster Head becomes the normal node. In the next round, the chosen node will be the Cluster Head of the cluster. After discussion of the basic algorithm, much more perfect content is set up for the routing. Flexible communication mechanism is presented and specified the format and content of the message which is used to communicate with each other of the nodes. At last, a new routing protocol is presented and some simulations of the wireless sensor network is done in the paper. In the mean while, the simulation of the Low-Energy Adaptive Clustering Hierarchy protocol is also carried out. The simulating results shows that, comparing with the traditional ones, the dynamic clustering Wireless Sensor Network Routing protocol algorithm which based on energy threshold consumes less energy and the life span of the network is much longer.
Keywords/Search Tags:wireless sensor network, routing protocol, energy efficiency, dynamic clustering
PDF Full Text Request
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