摘要
通过二维马尔可夫链模型分析了IEEE802.11DCF在饱和状态下的延迟特性,提出了二进制回退算法中平均回退窗的计算方法,并在此基础上给出了分布式协调功能(DCF)中接入延迟的理论分析方法,通过仿真验证了计算方法的有效性,为研究在无线局域网传输实时业务提供了理论依据.该计算方法还适合于IEEE802.11eEDCF在饱和状态下的延迟分析.
According to a simple but accurate 2-dim Markov chain model proposed by Banchi, the performance of BEB algorithm for IEEE 802.11 DCF in saturated situation was analyzed. An expression to compute the average back-off windows in the saturated case was given, and the evaluation of average access delay by theoretical analysis was also presented. From the simulation study, it was seen that the analytical method accorded with the simulation results preferably, which provided a theory basis for researches of real-time transmitting operations in wireless local area network. The computation method of average back-off windows and the analytical method of access delay could be applied to IEEE 802. lle EDCF without little modification in saturated situation of wireless LAN.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第4期27-29,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(60572047)
湖北省青年杰出人才基金资助项目(2005ABB006).
关键词
IEEE
802.11无线局域网
分布式协调功能
二进制指数回退算法
IEEE 802.11 wireless local area network
distributed coordination function（DCF）
binary exponential back-off（BEB） algorithm
