Researches On Routing Protocol Based On Topology Control In Wireless Sensor Network

Wireless sensor network(WSN)is composed by a large number of sensor nodes.Wireless sensor nodes have characteristics of huge number,cheap price,limited energy,self-organization communicational and informational exchange forms.For the sake of the characteristics of the ease of deployment,low cost and the adaptation to the harsh environment,WSN has a strong value and great prospects for development in practice.Topology control and routing algorithms have been the main research direction of WSN.To the issue that network node energy is limited,setting the network topology and establishing appropriate routing algorithms has been a hot point.In this paper,under the analysis of classical WSN protocol,a new solution has been proposed during the period of researching.The following study is below.Firstly,the basic concepts of WSN and topology control are introduced according to classification and comparison.Then according to different design methods,several typical routing protocol based on topology control are list respectively to analyze their design ideas,which can be pointed out their advantages and shortcomings.Through the analysis,it can be concluded that hierarchical clustering routing protocol is better than plane routing protocol,in terms of stability of the topology,the network of energy consumption balance,the reaction rate agreements and scalability.Through previous analysis,two representative protocols,HEED and EEUC,are selected in clustering routing protocol.Some essential detailed analysis has been done with the improved algorithm.To the problem of uneven location and the differ in numbers of clusters,"hot zone",a kind of uneven layered energy efficient routing protocol(ULEE)has been proposed.Under the ULEE Protocol,the entire network monitoring area is hierarchical preconditioning by the base station side.Monitoring area is divided into several layers of varying width.By assuming energy of each part is equal,campaign by formula deduced radius and width of each node in the hierarchical.Nodes are clustered in the respective layers.From high-level to low-level and then to the base station,the nodes complete the construction of the entire network topology via multi-hop transmission.ULEE is designed to be a way to hierarchical clustering.Clusters have been more evenly distributed.The number of clusters within each node is approximately equal.As a result of non-uniform layered mechanism,the design from the outset to reduce the possibility of "Hot Zone" issues that may arise.By setting topology maintenance,periodic network reconfiguration,the life of the network is further extended.Through simulation,analysis stratified ULEE protocol parameters n,ULEE has been taken for comparison with other routing protocols.By calculation and simulation analysis,the hierarchical parameter ULEE agreement in the monitoring area established in this paper,n=2 has the best performance.Meanwhile,in order to verifying the effect of ULEE agreement,LEACH,HEED,EEUC and other classic protocols are realized.By comparing the results on the number of sub-clusters,cluster heads energy consumption,energy consumption and network lifetime,ULEE agreement have a best performance.Finally,the whole essay makes a conclusion and points out the direction of future research.