Research On Energy Supplement Method Of Mobile Sensor Network Based On The Prediction Of Encounter Position

The wireless sensor network is a wireless network composed of a large number of static or dynamic sensors in a self-organizing manner.It can check and transmit the information of the perceived object,and is widely used in marine monitoring,ecosystem monitoring,and seismic monitoring.However,the limited battery power of the sensor node will result in insufficient energy supply to the node,which will not complete the monitoring task as usual and affect the performance and life cycle of the network.Therefore,it is necessary to solve the energy supplement problem of wireless sensor networks.Mobile sensor networks in wireless sensor networks are more flexible than static sensor networks,but the mobility of sensor nodes also poses new challenges for efficient energy replenishment of mobile sensor networks.Based on the dynamic characteristics of wireless mobile sensor networks,this paper proposes a mobile sensor network energy supplement method based on encounter position prediction.Firstly,according to the remaining energy and movement information of the mobile sensor,the minimum encounter time and the encounter position of the mobile charging device and each of the proposed charging request sensors are calculated.Sensors with short encounter times get a higher priority for the charging request service than for sensors with a long encounter time.At the same time,the fairness of charging of the sensor that proposes the charging request is considered,and the charging strategy is optimized.After obtaining the meeting position of the mobile charging device and the next required charging sensor node according to the charging strategy,the mobile charging device merges with the sensor at this position to reduce the moving speed and synchronously moves to charge it.The mobile charging device can perform the charging service independently during the entire charging process.At the same time,it is proved that the encounter time T_??i(T_??i)of the mobile charging device and the next sensor node i receiving the charging service is the shortest encounter time.Through a large number of simulation experiments,the experimental results are comprehensively analyzed from the three performances of node failure rate,average charging delay and charging cost.The analysis results show that the charging strategy proposed in this paper shortens the charging delay and improves the charging efficiency while ensuring the working efficiency of the sensor.