无线局域网络的性能模型和仿真

Performance Model and Simulation on the Wireless Local Area Network

为估算网络性能和设计连接接纳控制算法,研究了无线局域网络的媒体接入控制协议,提出了一种无线局域网络的随机服务模型,通过排队理论得到了无线局域网络在不同终端数目和不同网络负载条件下的性能指标.进一步指出了对于终端数目较多的无线局域网络,在网络负载的饱和临界点附近,网络性能存在突然的恶化,为连接接纳控制算法提供了理论依据.仿真试验验证了模型和结论的合理性.

A stochastic service system model based on the media access control protocol is provided for the performance estimation,and the connection admission control algorithm design of wireless local area networks.The network performances for various numbers of stations and various traffic loads are obtained based on the model and queue theory.Furthermore,it is presented that the network performances will deteriorate seriously when the traffic exceeds the saturated threshold in the wireless network with numerous stations and thus it provides theoretically results for the connection admission control algorithm.The model and conclusions are verified by simulations.