Research On Mobile Energy Supplement Method Based On Virtual Force In Wireless Sensor Network

Wireless sensor networks(WSN)is composed of a large number of cheap and low-power sensor nodes.The sensor nodes are powered by batteries,which have limited energy and are not easy to add energy.WSN usually works in a harsh environment without communication infrastructure.In order to achieve an effective data collection,the existing routing mechanism is prone to cause routing storm,resulting in a large number of node energy consumption.Therefore,how to prolong the lifetime of the nodes and the whole network has become a key problem in WSN.The emergence of wireless charging technology has solved the problem of limited energy in wireless sensor networks to a certain extent.The wireless rechargeable sensor network(WRSN)emerges at the required times.This paper makes a systematic and comprehensive analysis and summary on the method of mobile energy supplement in wireless sensor network,on the basis of in-depth study of the mobile wireless sensor network in rechargeable energy complementary methods respectively in one to one charging and one to more charging aspect made some innovation and research results.The main contributions of this article include the following aspects:Firstly,when sensor nodes is sparse,in view of the unfairness problem of current charging method of one to one charging,put forward moving energy based on virtual force of scheme by considering the distance of node and the mobile charging device and residual energy of the node to construct the virtual force model,provides a new and effective a fair way to achieve the WRSN energy supplement.Secondly,sensor nodes are more dense,and obviously it is more appropriate to use a one to more charging method.Based on this a single to multiple mobile energy efficient supplementary method is put forward,the mobile charging device maintains a B+ tree,and the leaf nodes into clusters according to the node location information request charging,the charging real-time node requests into B+ tree suitable clusters,delete the node in the charging is finished after power,mobile charging device calculates the virtual force of each cluster according to the residual energy of the nodes in the cluster and the cluster center and the distance information of the size of the largest cluster as a virtual force charging candidate cluster.When the mobile charging device is charged in the cluster,the virtual force of each node will be calculated periodically according to the residual energy and location information,and the position of the mobile charging device will be adjusted to the point of force balance to achieve one to many charging for each node in the cluster.