Hierarchical, collaborative wireless energy transfer in sensor networks with multiple Mobile Chargers
Hierarchical, collaborative wireless energy transfer in sensor networks with multiple Mobile Chargers
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DOI：
10.1016/j.comnet.2016.01.007
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发表时间：
2016-03-14
影响因子：
5.6
通讯作者：
Raptis, Theofanis P.
中科院分区：
文献类型：
--
作者：
Madhja, Adelina;Nikoletseas, Sotiris;Raptis, Theofanis P.
无线能量传输用于从根本上解决无线可充电传感器网络（WRSNs）中的能量管理问题。在这样的网络中，移动的实体穿越网络并且无线地补充传感器节点的能量。在最近的协同无线充电研究中，移动的实体也被允许相互充电。我们区分两组充电器，层次较低的移动的充电器充电传感器节点和层次较高的特殊充电器充电移动的充电器。我们定义了协调决策问题，并证明了它是NP-完全的。此外，我们提出了一个新的协议，1-D网络，我们比较的最先进的协议。受1-D网络改进的启发，我们提出并实现了4个新的2-D网络协同计费协议，以实现高效的计费和改善重要的网络属性。我们的协议是集中式或分布式的，并假设不同层次的网络knowledge.广泛的模拟结果表明显着的性能增益，相对于非协作状态的最先进的收费方法。特别是，我们的协议改善了几个网络属性和指标，如网络生命周期，路由鲁棒性，覆盖和连接。我们的方法的一个有用的功能是，它们可以适当地添加到顶部的非协作协议，以进一步提高其性能。(C)2016爱思唯尔B. V.保留所有权利。
Wireless energy transfer is used to fundamentally address energy management problems in Wireless Rechargeable Sensor Networks (WRSNs). In such networks mobile entities traverse the network and wirelessly replenish the energy of sensor nodes. In recent research on collaborative wireless charging, the mobile entities are also allowed to charge each other.In this work, we enhance the collaborative feature by forming a hierarchical charging structure. We distinguish the Chargers in two groups, the hierarchically lower Mobile Chargers which charge sensor nodes and the hierarchically higher Special Chargers which charge Mobile Chargers. We define the Coordination Decision Problem and prove that it is NP-complete. Also, we propose a new protocol for 1-D networks which we compare with a state of the art protocol. Motivated by the improvement in 1-D networks, we propose and implement four new collaborative charging protocols for 2-D networks, in order to achieve efficient charging and improve important network properties. Our protocols are either centralized or distributed, and assume different levels of network knowledge.Extensive simulation findings demonstrate significant performance gains, with respect to non-collaborative state of the art charging methods. In particular, our protocols improve several network properties and metrics, such as the network lifetime, routing robustness, coverage and connectivity. A useful feature of our methods is that they can be suitably added on top of non-collaborative protocols to further enhance their performance. (C) 2016 Elsevier B.V. All rights reserved.