The Research On Adaptive Evolution For Task-oriented Wireless Sensor Network

Wireless sensor network (WSN) is a new kind of information platform, itconsists of a cluster of sensor nodes in an extensive monitoring domain,the nodes withlow price,the ability of organization, etc. Sensor nodes to transmit informationthrough multiple hops routing to sink node, gathered by other network nodes is passedto the user, so as to realize data collection and monitoring tasks. Compared totraditional wireless networks, wireless sensor network with low cost, disorderlyinfrastructure, strong robustness, the characteristics of high adaptability to dynamicnetwork topology. In various fields, it received more and more attention.Wireless sensor network topology control is the basis of wireless sensor networkand communication, can be directly affects all aspects of the wireless sensor network.Through the control of the activity in the node or link, topology mechanism canreduce the network energy consumption, extend the service life of the network, datalink layer can be reduced by the data conflict, reduce the complexity of the networkrouting protocol. Based on physical topology control in wireless sensor network andthe formation of logical topology control. Mainly studied the following two aspects:The formation of the wireless sensor network physical topology, is a wirelesssensor network are faced with the problem in the first place. Good topology canreduce the communication distance between nodes, and reduces the energyconsumption of the node. Based on the analysis of the distribution of the energyconsumption of wireless sensor network (WSN), a control mechanism based on gridtopology is proposed, according to the sensing radius of sensor node and perceptualaccuracy, determine the appropriate radius of the grid, so that the radius of the gridpartition in a reasonable range, reduce the network energy consumption. Afterconsidering node dormancy may lead to problems for specific grid made a moredetailed classification, so ensure no blind area in the grid, thus ensuring the reliabilityof the grid.Perception tasks occur often and other factors have relevance, thus willsurrounding factors included in the data analysis of wireless sensor network is feasible.This train of thought on this, advances the idea, the knowledge of the wireless sensornetwork layer through the analysis of knowledge layer, can or specific area for topology control in wireless sensor network. In knowledge layer feedback sensornetwork topology control feedback reverse transmission problems, through in view ofthe topology control mechanism is put forward in this paper, put forward a kind of IPaddress allocation mechanism, on the premise of guarantee address uniqueness, as faras possible to reduce the size of the message header, which can save the networkenergy consumption.