计算机应用与软件2013，Vol.30Issue(1)：232-234,3.DOI:10.3969/j.issn.1000-386x.2013.01.058
基于信道利用率的无线自组网竞争窗口控制算法
CHANNEL EFFICIENCY-BASED CONTENTION WINDOW CONTROL IN WIRELESS AD HOC NETWORKS
摘要
Abstract
Physical carrier sensing is an effective mechanism for medium access control (MAC) protocols to reduce collisions, at the same time, the size of carrier sensing threshold has a great impact on the network performance. Since there is multiple rates in physical layer of wireless ad hoc networks, when the sending rate of MAC level does not match that of physical layer, it will cause network congestion and network performance degradation. In the paper, we investigate the relationship between rates in physical layer and carrier sensing threshold, and present an algorithm for choosing the carrier sensing threshold which is matched with multiple rates. Finally, based on the optimal rates in physical layer, we compare the MAC channel efficiency with that of physical layer, and adaptively control the sending rate in MAC by using the contention window in order to enhance the network performance. Simulation results show that the proposed mechanism outperforms 802. 11 DCF in terms of throughput and delay, 47.66% and 33. 18% , respectively.关键词
空间复用/信道利用率/竞争窗口/载波侦听阈值Key words
Spatial reuse/Channel efficiency/Contention window/Carrier sensing threshold分类
信息技术与安全科学引用本文复制引用
程辉,杨寿保,吕军..基于信道利用率的无线自组网竞争窗口控制算法[J].计算机应用与软件,2013,30(1):232-234,3.基金项目
滁州学院自然科学研究项目(2011kj014B). （2011kj014B）
