确保无线AdHoc网络服务质量的MAC协议研究

本文针对无线局域网中MAC层Qos支持技术进行了研究，在分析了现有的EDCF退避机制的静态参数设置方法的基础上，提出结合网络负载状况动态调节不同优先级业务的竞争窗口和退避时间，改变不同优先级业务的信道接入方式的方法。仿真结果表明，动态调节法相较于静态参数法在网络吞吐量、时延、碰撞率方面都有更好的表现。

Research on QoS-Guaranteed MAC Protocol in AdHoc Network

In the paper, the QoS support for Media Access Control （MAC） layer in wireless LAN is researched. On a basis of static parameter setting used in EDCF＇s backoff mechanism, in combination with network load, the compete window and backoff time with priority of different services can be dynamically adjusted to select the access mode to the channel in order of priority. The simulation shows that the dynamic adjustment has better performance in network throughout, time delay and collision rate than the mentioned static parameter setting.