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对无线Mesh网络准确建模是开展Mesh网络各项研究的基础,基于传统802.11协议模型来分析Mesh网络性能会导致较大的偏差。提出了一种适用于无线Mesh网络的新型模型用以计算网络饱和状态下性能参数的理论值,如丢包率、节点发送概率等,性能分析和仿真结果表明,该方法更能精确地评估无线Mesh网性能。同时在此基础上给出了路由判据ETX理论值的计算方法,该方法可用来预测ETX值而无需实测,从而有效的减少了测量误差和带宽消耗。
Accurately modeling wireless Mesh network is the basis of all researches on Mesh networks. Analyzing the Mesh network performance based on the traditional 802.11 protocol model will lead to large deviations. A new model of wireless Mesh network is proposed to calculate the theoretical parameters of performance parameters under saturation, such as packet loss rate and node transmission probability. The performance analysis and simulation results show that this method can evaluate wireless Mesh network performance. At the same time, the calculation method of the ETX theoretical value of the routing criterion is given. The method can be used to predict the ETX value without actual measurement, so as to effectively reduce the measurement error and the bandwidth consumption.