摘要
针对无线网络的IEEE802.11的DCF机制,文章构建一种基于冲突概率p的分析模型,该模型综合考虑了无线网络中的节点数、网络负载及退避算法中的退避阶数及重传次数等影响因素,利用M/G/1/K队列模拟无线网络终端的饱和与非饱和状态,采用二维Markov对无线网络系统建模,由该模型得到网络系统的归一化吞吐量,并分析不同的数据包到达率对网络性能的影响,为预测和优化系统的性能提供理论依据。
A performance analytic model based on collision probability is proposed for IEEE802.11 DCF in wireless local area network.The model takes into account the number of the network terminals, traffic loads, number of back-off and number of retransmission in the BEB mechanism, use the M/G/1/K queuing to model the saturation and unstauration, based on this, a new analytical Markov model is used to model the system, and the normalized throughput is evaluated, and its performance under different packet arrival rates is analied. The accuracy of the model is confirmed through simulation, and it provides a theory basis for predicting and optimizing the performance of the DCF.
出处
《无线互联科技》
2015年第21期11-12,共2页
Wireless Internet Technology
