A Fair Polling Scheme for Energy Harvesting Wireless Sensor Networks
A Fair Polling Scheme for Energy Harvesting Wireless Sensor Networks
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DOI：
10.1109/vtcspring.2015.7145602
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
Masashi Kunikawa;H. Yomo;Kenichi Abe;Tetsuya Ito
中科院分区：
文献类型：
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作者：
Masashi Kunikawa;H. Yomo;Kenichi Abe;Tetsuya Ito
能量收集无线传感器网络（EHWSNs）正在积极研究，以解决电池供电的无线传感器网络所面临的问题，即电池更换成本和对环境的影响。在eh - wsn中，每个节点收集周围的能量，如光、热、振动，并将其用于传感、计算和无线通信，其中每个节点收集的能量量取决于其周围的环境。eh - wsn的MAC协议需要设计成高吞吐量和高公平性，但传统的eh - wsn MAC协议不能适应每个节点的收获速率，导致公平性较差。本文提出了一种基于轮询的eh - wsn公平MAC协议。该方案根据单个收获率调整各节点的争用概率，从而提高低收获率节点的吞吐量。我们通过计算机模拟对所提出的公平轮询方案的吞吐量和公平性进行了评估，结果表明所提出的方案可以在不降低整体网络吞吐量的情况下提高公平性。
Energy harvesting wireless sensor network (EHWSNs) are being actively studied in order to solve the problems faced by battery-operated WSNs, namely the cost for battery replacement and impacts on the environment. In EH-WSNs, each node harvests ambient energy, such as light, heat, vibration, and uses it for sensing, computations, and wireless communications, where the amount of harvested energy of each node varies depending on their surrounding environments. MAC protocols for EH-WSNs need to be designed to achieve high throughput and fairness, however, the conventional MAC protocols proposed for EH-WSNs do not adapt to the harvesting rate of each node, resulting in poor fairness. In this paper, we propose a fair MAC protocol based on polling scheme for EH-WSNs. The proposed scheme adjusts contention probability of each node according to the individual harvesting rate, thereby increasing throughput achieved by nodes with low harvesting rate. We evaluate throughput and fairness of the proposed fair polling scheme by computer simulations, and show that the proposed scheme can improve fairness with little degradation of the overall network throughput.