基于预测的无线 mesh 网络切换机制的研究

将无线mesh网技术应用到城市轨道交通中，对车地通信中存在的关键问题———越区切换延时进行分析，并提出一种差分预测的方案对切换延时较长的问题进行优化。通过应用OP-NET仿真软件对现有的切换方案与本文提出的差分预测切换方案进行比较。仿真表明，差分预测切换方案有效降低了切换延时。

Research on Prediction-based Handoff Mechanism in Wireless Mesh Network

This paper used wireless mesh network technology into the city track traffic .The problem that exists in the train -ground communication＇s handoff delay was analyzed , and a difference predictive scheme which can optimize the problem of handoff delay longer was put forward .Then, existing handoff scheme and difference predictive handoff scheme were simulated with OPNET .Simulation results show that differential pre-dictive handoff scheme can effectively reduce the handoff delay .