Routing Protocol for Heterogeneous Wireless Sensor Networks Based on a Modified Grey Wolf Optimizer

被引:48
作者
Zhao, Xiaoqiang [1 ,2 ]
Ren, Shaoya [1 ,2 ]
Quan, Heng [1 ,2 ]
Gao, Qiang [3 ]
机构
[1] Xian Univ Posts & Telecommun, Sch Commun & Informat Engn, Xian 710121, Peoples R China
[2] Xian Univ Posts & Telecommun, Shaanxi Key Lab Informat Commun Network & Secur, Xian 710121, Peoples R China
[3] Northwest Agr & Forestry Univ, Coll Mech & Elect Engn, Yangling 712100, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
heterogeneous wireless sensor networks; grey wolf optimizer; network lifecycle; energy consumption; ENERGY-EFFICIENT; ALGORITHM; LEACH;
D O I
10.3390/s20030820
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Wireless sensor network (WSN) nodes are devices with limited power, and rational utilization of node energy and prolonging the network lifetime are the main objectives of the WSN's routing protocol. However, irrational considerations of heterogeneity of node energy will lead to an energy imbalance between nodes in heterogeneous WSNs (HWSNs). Therefore, in this paper, a routing protocol for HWSNs based on the modified grey wolf optimizer (HMGWO) is proposed. First, the protocol selects the appropriate initial clusters by defining different fitness functions for heterogeneous energy nodes; the nodes' fitness values are then calculated and treated as initial weights in the GWO. At the same time, the weights are dynamically updated according to the distance between the wolves and their prey and coefficient vectors to improve the GWO's optimization ability and ensure the selection of the optimal cluster heads (CHs). The experimental results indicate that the network lifecycle of the HMGWO protocol improves by 55.7%, 31.9%, 46.3%, and 27.0%, respectively, compared with the stable election protocol (SEP), distributed energy-efficient clustering algorithm (DEEC), modified SEP (M-SEP), and fitness-value-based improved GWO (FIGWO) protocols. In terms of the power consumption and network throughput, the HMGWO is also superior to other protocols.
引用
收藏
页数:18
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