CCF多信道机制性能分析模型和方法  

Performance analytic model and method for CCF multi-channel mechanism

作　　者：严军荣[1] 张顺颐[1] 孙雁飞[1] 李君[1] 

机构地区：[1]南京邮电大学信息网络技术研究所,江苏南京210003

出　　处：《通信学报》2009年第4期118-124,共7页Journal on Communications

基　　金：国家高技术研究发展计划("863"计划)基金资助项目(2009AA01Z202;2009AA01Z212;2006AA01Z232);江苏省自然科学基金资助项目(BK2007603);浙江省自然科学基金资助项目(Y1080935);江苏省重大科技支撑计划资助项目(BE2008134);江苏省高技术研究计划资助项目(BG2007045)~~

摘　　要：提出802.11s草案中公共信道框架(CCF)多信道机制的性能分析模型和方法。确定CCF存在着分配和不分配公共信道传输数据2种状态,在公共信道上分别提出2种状态的性能分析模型并推导吞吐率计算公式,同时提出CCF的状态转移条件;以信道速率、数据帧有效载荷、信道数和站点数为参数对CCF的吞吐率和信道平均吞吐率进行仿真。仿真结果显示随着信道速率的增加、站点数的增多和/或数据帧有效载荷的减少,CCF由分配公共信道转移为不分配公共信道传输数据状态所占用的信道数量减少,CCF处于不分配公共信道传输数据状态时吞吐率最大。According to the characteristics of common channel framework（CCF） multi-channel mechanism of 802.11s draft, a performance analytic model and method were proposed. Considering two states of assigning or no assigning common channel to transmit data existed in CCF, two performance analytic models based on common channel were proposed and throughput formulas were deduced, furthermore condition of state transition was presented. There were four parameters, such as data rate, payload, number of channels and number of stations, participating in the simulation of throughput. The simulation result shows that with increasing of data rate, increasing of number of stations and/or decreasing of payload, the number of channels needed decreases as state of assigning common channel transiting to state of no assigning common channel, and then the throughput of CCF reaches the maximum.

关 键 词：无线mesh网络:802.11s 多信道 公共信道框架 

分 类 号：TP393.17[自动化与计算机技术—计算机应用技术]