The Scheme For Mobile Date Gathering And Charging In Wireless Sensor Networks

With the development of wireless charging technology,we can charge the sensor nodes in wireless sensor networks and keeps the network running.In the meanwhile,data gathering has been a hot topic in wireless sensor networks.The traditional way of data gathering transmits the data to the base station through multi-hop relay.Recently,mobile data gathering has been considered as an efficient alternative to traditional data gathering.In this paper,we propose schemes which integrate wireless charging with mobile data gathering.This paper first proposes a scheme which assumes the energy consumption of sensor nodes and the data generation rate of sensor nodes are constant,the remaining energy of sensor nodes can be predicted based on the offline model.Then we propose another scheme and adopt the on-demand strategy based on the online model.The online model assumes the energy consumption of sensor nodes and the data generation rate of sensor nodes are not constant,the remaining energy of sensor nodes cannot be predicted.The main contents of this paper are as follows:(1)The scheme uses multiple SenCars to gather data in the network and replenish energy for the network based on the offline model.The previous schemes proposed by the scholar is not guaranteed that the data generated by the sensor nodes in the network is gathered in each cycle,and the sensor nodes would die during the network operation(the sensor node is called "death" when its remaining energy is lower than the normal working value).The sensor nodes cannot die in some cases,so the previous schemes cannot be used in these cases.(2)In the previous research,the data gathering combine with charging are offline and passive.This paper further studies the scheme which integrate wireless charging with mobile data gathering based on the online model.We want to gather as much data as possible within the service capabilities of a single SenCar.To this end,we propose Weight Priority Charging Scheme and theoretically analyze the upper limit of network size that a single SenCar can service.(3)This paper implement these schemes on the platform of Eclipse.The feasibility and validity of the proposed schemes are proved by simulation.