A Uniform Clustering Mechanism for Wireless Sensor Networks
A Uniform Clustering Mechanism for Wireless Sensor Networks
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DOI：
10.1155/2014/924012
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发表时间：
2014-03
影响因子：
2.3
通讯作者：
Rabia Noor Enam;Rehan Qureshi;S. Misbahuddin
中科院分区：
文献类型：
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作者：
Rabia Noor Enam;Rehan Qureshi;S. Misbahuddin
在动态分簇的无线传感器网络中，簇头的选择通常不是基于簇头的位置。这导致簇头的不规则分布和簇中的节点数量高度可变。此外，一些簇分布在网络内的大范围内，导致相关传感器节点之间的空间相关性有限。这些簇位置和尺寸上的不规则性对无线传感器网络的效率产生了负面影响。例如，对于协作数据聚合，它需要可变或大小的分组，而基于传感器节点空间相关性的聚合不容易被利用。本文针对基于分簇的无线传感器网络提出了一种分布式统一分簇算法(DUCA)。在DUCA中，簇的形成机制基于虚拟网格系统和节点的感知范围，从而提供均匀的簇分布、均匀的簇大小和降低的能量消耗。仿真结果表明，与已有协议相比，DUCA协议的簇头分布改善了2倍以上，能耗降低了15%~50%。
In wireless sensor networks with dynamic clustering, the cluster heads are usually not selected on the basis of their locations. This causes irregular distribution of cluster heads and highly variable number of nodes in the clusters. Also, some of the clusters are spread over large areas within the network, causing limited spatial correlation between associated sensor nodes. These irregularities in cluster placements and dimensions negatively impact the efficiency of a wireless sensor network. For example, for a cooperative data aggregation, it necessitates variable or large sized packets while the aggregations, based on spatial correlation of sensor nodes, cannot be exploited easily. In this paper, we have developed a Distributed Uniform Clustering Algorithm (DUCA) for cluster based WSN. In DUCA, cluster formation mechanism is based on a virtual-grid system and sensing ranges of nodes that provide even distribution of clusters, homogenized cluster sizes, and reduced energy consumption. Simulation results show that DUCA improves the distribution of cluster heads by more than 2 times and reduces the energy consumption within a range of 15% to 50% as compared to the existing protocols.