Recharging and Monitoring Mechanisms in Wireless Sensor Networks for Unlimited Lifetime and Balanced Quality of Target Monitoring

• Main Authors: Chao-Lun Cheng, 鄭昭倫
• Other Authors: Shin-Jia Hwang
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/ys9297

碩士 === 淡江大學 === 資訊工程學系資訊網路與通訊碩士班 === 102 === Target coverage is an important issue of wireless sensor networks and has been received a lot of attention in the past few years. Recent studies have shown that energy harvesting is essential for sensor networks in some specific situations, because it is costly and hard to maintain the wireless networks if the sensors’ battery was frequently replaced. As a result, this paper addresses the target coverage problem for the solar-powered sensor networks, and this paper also consider that the POIs would have the different importance since they are distributed in different places over the network environment. In the considered WSN, each sensor can either recharge its battery or monitor the point of interest (POI) at the same time. To make the WSN perpetual and balance the quality of target monitoring, this paper proposes two efficient sensor activation schedules while guarantee the target coverage and the POIs which with the higher importance will have the higher QoM. In addition, the proposed activation schedules can guarantee that all POIs can be well monitored even during the nighttime. In the performance study, it presents that the proposed mechanism outperforms the existing mechanisms in term of QoM balance index of POIs, decrease the range of the POIs’ QoM.