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Residual Energy-Aware Duty-Cycle Scheduling Scheme in Energy Harvesting Wireless Sensor Networks
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 Title & Authors
Residual Energy-Aware Duty-Cycle Scheduling Scheme in Energy Harvesting Wireless Sensor Networks
Lee, Sungwon; Yoo, Hongseok; Kim, Dongkyun;
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 Abstract
In order to increase network lifetime, duty-cycle MAC protocols which can reduce energy consumption caused by idle listening is proposed for WSNs. In common duty-cycle MAC protocols, each sensor node calculates its duty-cycle interval based on the current amount of residual energy. However, in WSNs with the capability of energy harvesting, existing duty-cycle intervals based on the residual energy may cause the sensor nodes which have high energy harvesting rate to suffer unnecessary sleep latency. Therefore, a duty-cycle scheduling scheme which adjust the duty-cycle interval based on both of the residual energy and the energy harvesting rate was proposed in our previous work. However, since this duty-cycle MAC protocol overlooked the performance variation according to the change of duty-cycle interval and adjusted the duty-cycle interval only linearly, the optimal duty-cycle interval could not be obtained to meet application requirements. In this paper, we propose three methods which calculate the duty-cycle interval and analyse their results. Through simulation study, we verify that network lifetime, end-to-end delay and packet delivery ratio can be improved up to 23%, 44% and 31% as compared to the existing linear duty-cycle scheduling method, respectively.
 Keywords
Duty-cycle MAC protocol;Energy Efficiency;Energy Harvesting;
 Language
Korean
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