无线传感器网络中基于时空分集的分布式能量有效成簇算法

A Distributed Energy-efficient Clustering Algorithm Based on Space-time Diversity for Wireless Sensor Networks

为了延长无线传感器网络的生存时间,需要设计适合无线传感器网络特点的能量有效的协议。成簇算法能够减少无线传感器网络的能量消耗,对增强网络的可扩展性和延长网络的生存时间有着重要的作用。但现有算法对多路衰退的链路并不十分能量有效,针对这些算法的不足,提出了基于时空的分布式能量有效成簇算法,每个簇由一个簇首节点和一个协作节点相互合作运用时空编码实现数据传输的时空分集,以减少网络能耗和均衡节点能量。模拟实验结果显示,与现有重要成簇算法相比,该算法能够提供更长的网络生存时间。

In order to prolong the lifetime of network, it is necessary to design a energy-efficient protocol according to the characteristics of wireless sensor network. Clustering algorithm can reduce the energy consumption of wireless sensor networks. It provides good performance for the network scalability and helps great in prolonging network lifetime. The existing algorithms are not energy-efficient enough for the channel suffered from multi-path fading. This paper proposes a distributed energy-efficient clustering algorithm based on space-time diversity. In each clustering, there are one cluster head and one cooperative node. They provide space-time diversity for the data transmission which would reduce the energy consumption of the network and balance the energy of the nodes. The experiment results show that algorithm provides lifetime of the network than current clustering algorithms.