IEEE 802.11DCF的不公平性及改进方法综述

Survey of Unfairness in IEEE 802.11DCF and its Solutions

首先介绍了几种关于公平性的定义,讨论了IEEE802.11标准中定义的分布式协调功能DCF产生不公平性现象的原因以及由此带来的不利后果;对当前已提出的各种主要的IEEE802.11公平性改进方法作了系统地介绍和评述,并对它们的特点进行了比较;最后,对公平性研究的发展趋势作了展望。

Firstly,introduces several definitions on fairness and discusses the main reasons that cause the unfairness problem in the DCF of IEEE 802.11 standard.Its negative effects on the protocol performance are also illustrated.Then,several typical improved algorithms for achieving IEEE 802.11 fairness are reviewed in categories,their main ideas are discussed and some comments are made.Finally,points out several future research directions on this topic.