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选择合适的路由量度对于提高无线传感器网络的路由效率而言至关重要。综述了现有无线网络几种典型的路由量度,并通过实验研究,发现了无线传感器网络的通信链路存在着高丢失率、非对称性等特点;进而分析了采用传统单一的路由量度方法在设计无线传感器网络路由协议时存在的不足;通过定义链路连接门限β,提出了一种基于Hops与ETX相结合的混合路由量度方法;将此路由量度方法应用于AODV协议中,仿真结果表明所提出的混合路由量度是一种高吞吐量,低丢失率的量度方法,能够为无线传感器网络高效路由协议的设计提供有价值的参考。
Choosing the right route metric is crucial to improving the routing efficiency of wireless sensor networks. Several typical routing metrics of existing wireless networks are reviewed. Through experimental research, it is found that there are high loss rates and asymmetries in the communication links of wireless sensor networks. Furthermore, the traditional single routing metric The design of wireless sensor network routing protocol has some shortcomings. By defining the link threshold β, a hybrid routing metric based on Hops and ETX is proposed. The routing metric method is applied to AODV protocol. The simulation results show that The proposed hybrid routing metric is a high-throughput and low-loss metric that provides a valuable reference for the design of efficient routing protocols in wireless sensor networks.