移动终端在异构无线网络中的接入方法

Vertical handoff for heterogeneous wireless network based on mobile terminal priority

移动客户终端在网络中的频繁切换,直接影响了网络的维持时间和网络通信的时效性,无法满足移动客户端对网络的需求。提出一种基于优先移动客户终端的垂直切换方法。根据信号强度、网络带宽、误码率、网络阻塞率、网络维持时间、终端移动趋势以及移动客户终端的决策,计算条件概率切入最优网络。仿真结果表明,切换质量得到了提高,有效地保障了网络的更新。

Frequent switching of mobile client terminal in the network directly affects the network maintenance time and the timeliness of network communication,which fails to meet the need of mobile clients on the network.Based on the priority of the mobile client terminal the vertical handoff method of selecting optimal network was proposed,to select optimal network by calculating the conditional probability on a basis of signal strength,network bandwidth,bit error rate,network congestion rate,the network maintenance time,terminal mobility as well as mobile client terminal decision.Simulation results showed that the switching quality was improved,and the switching could effectively guaranteed the network updating.