IEEE802.11a WLAN中DCF性能分析  

Saturation Throughput and Delay Analysis of DCF in IEEE 802.11a WLAN

作　　者：陈羽中[1] 杨丙卿[1] 开彩红[1] 刘政凯[1] 

机构地区：[1]中国科学技术大学信息处理中心,安徽合肥230026

出　　处：《应用科学学报》2006年第2期165-170,共6页Journal of Applied Sciences

基　　金：中国科学院知识创新工程(cxjj-91);国家"863"高技术研究发展计划资助项目(2002AA783043)

摘　　要：引入二维马尔科夫模型,对DCF的两种传输方式:基本接入方式和RTS/CTS方式,在IEEE802.11a WLAN中的饱和吞吐量和传输时延性能进行了理论分析和仿真,理论分析和仿真结果表明,与低速IEEE802.11WLAN中的情况相反,在IEEE802.11a WLAN中,基本接入方式在多数情况下比RTS/CTS方式更有效.IEEE 802.11a is a popular high-speed WLAN standard with a data rate up to 54 Mps. The basic Medium Access Control （MAC） protocol of IEEE 802.11a is the contention-based distributed coordination function. DCF includes two access mechanisms： basic access mechanism and RTS/CTS access mechanism. In this paper, an analysis and comparison of saturation throughput and access delay of these two access mechanisms in IEEE 802.11a WLAN is conducted by introducing a two-dimensional Markov model. The study reveals that, in contradiction to the situation in IEEE 802.11 WLAN, basic access mechanism is always more effective than RTS/CTS mechanism in high-speed IEEE 802.11 a WLAN.

关 键 词：IEEE802.11A DCF 饱和吞吐量 传输时延 

分 类 号：TP393.17[自动化与计算机技术—计算机应用技术]