School of Electrical Engineering and Computer Science, National University of Sciences and Technology, H-12, Islamabad, Pakistan.
Sensors (Basel). 2012;12(1):92-114. doi: 10.3390/s120100092. Epub 2011 Dec 22.
In this work, we present an energy efficient hierarchical cooperative clustering scheme for wireless sensor networks. Communication cost is a crucial factor in depleting the energy of sensor nodes. In the proposed scheme, nodes cooperate to form clusters at each level of network hierarchy ensuring maximal coverage and minimal energy expenditure with relatively uniform distribution of load within the network. Performance is enhanced by cooperative multiple-input multiple-output (MIMO) communication ensuring energy efficiency for WSN deployments over large geographical areas. We test our scheme using TOSSIM and compare the proposed scheme with cooperative multiple-input multiple-output (CMIMO) clustering scheme and traditional multihop Single-Input-Single-Output (SISO) routing approach. Performance is evaluated on the basis of number of clusters, number of hops, energy consumption and network lifetime. Experimental results show significant energy conservation and increase in network lifetime as compared to existing schemes.
在这项工作中，我们提出了一种节能的分层协作聚类方案，用于无线传感器网络。通信成本是消耗传感器节点能量的关键因素。在提出的方案中，节点在网络层次的每个级别合作形成集群，确保最大的覆盖范围和最小的能量消耗，同时在网络内相对均匀地分配负载。通过协作多输入多输出（MIMO）通信来提高性能，确保在大面积地理区域内的 WSN 部署的能量效率。我们使用 TOSSIM 测试了我们的方案，并将提出的方案与协作多输入多输出（CMIMO）聚类方案和传统的多跳单输入单输出（SISO）路由方法进行了比较。性能是根据簇的数量、跳数、能量消耗和网络寿命来评估的。实验结果表明，与现有方案相比，该方案显著节省了能量，并延长了网络寿命。
