Performance enhancement and bandwidth guarantee in IEEE 802.11 wireless LANs

被引：2

作者：

Peng, Y ^{[1
]}

Cheng, SD ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecommunicat Networks, Natl Lab Switching Technol, Beijing, Peoples R China

来源：

JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY | 2004年 / 19卷 / 02期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

IEEE; 802.11; performance enhancement; bandwidth guarantee;

D O I：

10.1007/BF02944792

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper first revisits the previously proposed NSAD (New Self-Adapt DCF) mechanism. Some modifications are presented to further enhance the performance of NSAD in the error-prone environment. Then a new MAC mechanism is proposed that can realize bandwidth guarantee by assigning different self-adapt parameters to users at different priority levels. The bandwidth guarantee property of this new mechanism is analyzed and the high priority users are found to have bandwidth guaranteed even in heavy contention condition, which is proved true not only by theoretical analysis but also by simulation results. At the same time the new scheme keeps the self-adapt character of NSAD, so the overall system utilization is kept very high in heavy contention condition compared with the previously studied DCF-based QoS mechanisms.

引用

页码：150 / 157

页数：8

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