A clustering-tree topology control based on the energy forecast for heterogeneous wireless sensor networks
A clustering-tree topology control based on the energy forecast for heterogeneous wireless sensor networks
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DOI：
10.1109/jas.2016.7373764
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发表时间：
2016-01
期刊：
影响因子：
--
通讯作者：
Zhen Hong;Rui Wang;Xile Li
中科院分区：
文献类型：
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作者：
Zhen Hong;Rui Wang;Xile Li
如何设计一种高效节能的算法，使复杂场景下的网络寿命最大化，是异构无线传感器网络（HWSN）的关键问题。本文提出了一种基于能量预测（CTEF）的聚类树拓扑控制算法，在考虑链路质量、丢包率等因素的同时，实现了节能和保证网络负载均衡。在CTEF中，利用中心极限定理和正态分布机制，根据理想平均剩余能量与实际平均剩余能量的差值，准确预测每轮网络的平均能量（网络的寿命以轮表示）。在此基础上，根据代价函数（包括能量、链路质量和丢包率）及其距离选择簇头。非簇头通过能量、距离和链路质量来确定是否加入簇。此外，在每个簇中选择若干个非簇头作为中继节点，通过多跳通信传输数据，以减少每个簇头的负载，延长网络的生命周期。仿真结果表明了CTEF的有效性。与低能量自适应聚类层次（LEACH）、能量耗散预测与聚类管理（EDFCM）和高效动态聚类方案（EDCS）协议相比，CTEF具有更长的网络寿命和更多的基站接收数据包。
How to design an energy-efficient algorithm to maximize the network lifetime in complicated scenarios is a critical problem for heterogeneous wireless sensor networks (HWSN). In this paper, a clustering-tree topology control algorithm based on the energy forecast (CTEF) is proposed for saving energy and ensuring network load balancing, while considering the link quality, packet loss rate, etc. In CTEF, the average energy of the network is accurately predicted per round (the lifetime of the network is denoted by rounds) in terms of the difference between the ideal and actual average residual energy using central limit theorem and normal distribution mechanism, simultaneously. On this basis, cluster heads are selected by cost function (including the energy, link quality and packet loss rate) and their distance. The non-cluster heads are determined to join the cluster through the energy, distance and link quality. Furthermore, several non-cluster heads in each cluster are chosen as the relay nodes for transmitting data through multi-hop communication to decrease the load of each cluster-head and prolong the lifetime of the network. The simulation results show the efficiency of CTEF. Compared with low-energy adaptive clustering hierarchy (LEACH), energy dissipation forecast and clustering management (EDFCM) and efficient and dynamic clustering scheme (EDCS) protocols, CTEF has longer network lifetime and receives more data packets at base station.