无线局域网MAC层DCF方式的仿真研究

The Simulation Research of Wireless Local Area Network's MAC with DCF Way

针对无线局域网MAC层DCF方式模型建立难度较高,性能参数较难得到的问题,采用一种基于时间窗口分析的方法,建立DCF基本模型.根据IEEE802.11提供的二进制指数退避算法,应用OPNET仿真工具进行实验设计.实验结果表明,系统的网络吞吐量指标随着节点个数的增加而减少,时延指标则随时间的增加而线性增长.

Modeling of network is hard and the performance parameter is difficult to get in the WLAN＇s MAC floor with DCF way, to adopt one method based on time window＇s analysis.to build the model, IEEE supports us with binary exponential backoff arithmetic, so we use OPNET simulator to design the work, the result states that when the node＇s amounts increase, the system＇s throughput decreases and when time increases, the system＇s delay increases linear.