东南大学学报（自然科学版）Issue(1)：34-38,5.DOI:10.3969/j.issn.1001-0505.2014.01.007
无线多跳网络中802．11 DCF广播信道接入性能分析
Performance analysis of 802.11 DCF broadcast channel access in wireless multi-hop networks
摘要
Abstract
Channel access problems in wireless multi-hop networks adopting network coding and op-portunistic forwarding technologies are analyzed.A model for an 802.1 1 distributed coordination function (DCF)broadcast channel access process is built to quantitatively analyze the factors that af-fect the performance including the throughput,delay and fairness in wireless multi-hop networks. Behaviors of nodes such as packet arriving,queuing,channel access and sending are modeled based on an M/M/1/K queue and a two-dimensional discrete-time Markov chain when these nodes have different packet arriving rates.By solving the model,equations are obtained to calculate several per-formance indices such as the actual transmission rate and packet service time on each node and the total throughput of the system.Results generated by the model are compared with experimental re-sults from a simulation based on the NS-2 platform.It is shown that the model can effectively predict transmission performance indices including average packet service time and fairness of channel re-source allocation under various traffic load combinations.关键词
无线mesh网络/Markov链/广播信道接入Key words
wireless mesh networks/Markov chain/broadcast channel access分类
信息技术与安全科学引用本文复制引用
张三峰,刘铮,吉逸..无线多跳网络中802．11 DCF广播信道接入性能分析[J].东南大学学报（自然科学版）,2014,(1):34-38,5.基金项目
国家自然科学基金资助项目（61300200）、江苏省自然科学基金资助项目（BK2011335）． （）
