基于DCF协议的基本服务集互听的系统性能分析

System performance analysis of basic service set mutual listening system based on DCF protocol

本文首先介绍了在分布式协调机制(distributed coordination function,DCF)下数据传输流程和蒙特卡洛仿真流程。其次,为分析在复杂条件下的系统性能,本文对二维马尔科夫模型进行改进并建立了一个以吞吐量期望为系统评价指标的信道接入机制性能分析框架。最后,为了评估所建立的框架的有效性和准确性,本文将两组实际参数作为框架输入,进行吞吐量的求解,并进行了两组仿真实验得出物理层速率对系统单节点吞吐量的影响。仿真结果表明,本文所建立的信道接入机制性能分析框架在推导吞吐量方面具有较高的精度,与仿真器模拟结果相比误差较小,对指导实际网络信道接入具有科学的参考意义。

Firstly,this paper represents the data transmission process and the Monte Carlo simulation process under the distributed coordination function(DCF).Secondly,to analyze the system performance under complex conditions,this paper improves the two-dimensional Markov model and establishes a performance analysis framework of channel access mechanism with throughput expectation as the system evaluation index.Finally,to evaluate the effectiveness and accuracy of the established framework,this paper takes two sets of actual parameters as the input of the framework to solve the throughput.Two sets of simulation experiments are carried out to obtain the influence of the physical layer rate on the single node throughput of the system.The simulation results show that the performance analysis framework of the channel access mechanism established in this paper has high accuracy in deriving throughput.The error is small compared with the simulation results of the simulator,which has scientific reference significance for guiding the actual network channel access.