无线传感器网络中基于链路转发的拓扑控制算法

Topology control algorithm in wireless sensor networks based on link transmit hybrid cluster

提出一种基于链路转发的混合分簇(LTHC)拓扑控制算法。该算法是在传统低功耗自适应集簇分层型(LEACH)算法的基础上,通过改变簇首的通信方式来降低能耗。算法主要思想是:在网络生成若干簇后,在簇首与SINK节点之间建立一条链路,并且链路节点为非簇首节点,簇首通过该链路转发数据到SINK节点。通过这种通信方式可以有效降低离SINK节点较远的簇首能量消耗,使得网络的能量消耗平均分布到网络其他节点上,从而延长网络的生命期,提高网络通信量。通过仿真,发现LTCH算法远远优于传统LEACH算法,在通信量和网络生存期上都有很大的提高。

This paper put forward Link Transmit Hybrid Clustering （LTHC） topology control algorithm. On the basis of Low-Energy Adaptive Clustering Hierarchy （LEACH）, LTHC reduced energy consumption through changing the communication way of the cluster header. When clusters had been formed, a link was created between clusters and SINK node, and link node must not be the cluster header. Cluster head transmitted data to SINK node through the link. The communication could decrease much energy consumption of the node far away from SINK node, and make energy to be distributed on network equally, prolong the network lifetime, and increase the amount of communication. The experimental results show that LTCH is much better than LEACH, and has much improvement in communication amount and network lifetime.