Research On Mobile Charging Technology In Wireless Sensor Networks

As one of the most important ways to obtain information data in contemporary information-based society,Using wireless sensor network to collect information data has always been concerned by many scholars from different industries.Wireless sensor network is playing an important role in various fields and having it indispensable and irreplaceable function,for example,collecting scalar data such as temperature,humidity and position,also as well as in medical surveillance,traffic monitoring and intelligent home monitoring.While in a wireless sensor network,the sensor node power issue is brought into sharp focus.In order to maintain the normal operation of the sensor node,it is a key issue to supplement the power of the node to prolong the life of the network.Based on a rechargeable sensor network,this paper proposes a method of using a mobile vehicle as a charging device to supplement the power of the rechargeable sensor nodes distributed in the network.Based on various limitations of the network model,sensor energy consumption model,etc.,set in different scenarios,the supplementary plans for the mobile vehicle will also be different.The general method is to establish an abstract model of a sensor network,then establish a charge to be charged set based on need and make a plan of charging paths in the set to be charged.Firstly,we study the use of a single mobile vehicle to serve the entire network in a smaller sensor network.Performing a single vehicle charging process with the goal to maximize the power-using efficiency,we add more nodes to the pool to be charged gradually.Secondly,we study the addition of data collection during the charging process.Finally we investigate the use of multiple mobile vehicle service networks in a larger network.Then we propose a two-step method to solve the problem,in order to achieve minimize the total number of mobile vehicle and travel route.The results of simulation show that the algorithm proposed in this paper effectively improves the power-using efficiency of the charging trolley,also can supplement the power of the wireless sensor network more efficiently and prolong the network lifetime.