C-MCC:无线可充电传感器网络中一种基于分簇的多MC协同充电策略

C-MCC:A Clustering-based Coordination Charge Policy of Multiple Mobile Chargers in Wireless Rechargeable Sensor Networks

已有研究显示,将无线能量转移机制应用到WSN中能够从根本上改善WSN的寿命.为了提供稳定的并且高的充电效率以提高网络的性能,提出了一种基于分簇的多移动充电器(Mobile Charger,MC)协同充电策略C-MCC,文中定义MC相对合适度用于衡量网络中的MC相对于簇头节点的合适程度,并结合MC的当前剩余能量和MC与簇头节点的距离给出了相应的计算公式.在C-MCC中,整个网络被划分为多个充电簇,簇头节点只向网络中相对合适度最大的MC传送簇状态信息.MC在进行充电决策时,不仅考虑了充电簇的当前剩余能量,还考虑了MC与簇头节点之间的距离.仿真结果表明,C-MCC提高了充电效率,在网络中存活的节点数方面较DCLK都有所增加,网络路由鲁棒性和网络连通度较DCLK提高了7.7%.

Previous studies show that the wireless transfer mechanism can be used to improve the life of WSN. In order to provide a stable and high efficiency charging to improve network performance, this paper proposes a clustering-based collaborative charging poli- cy of multi-MC named C-MCC. Relative suitability is defined in this paper used to measure the appropriate degree relative to cluster header, and the corresponding formula which take both the current residual energy of MC and distance between MC and cluster header into consideration is given in this paper. The entire network is divided into multiple clusters, each cluster head send the cluster state message only to the most appropriate MC. The simulation results show, the proposed C-MCC strategy can improve the charging efficiency. C-MCC can increase the survival nodes over DCLK, the routing robustness and connectivity of network improved by 7. 7% compared to DCLK.