Throughput and Delay Analysis for a Differentiated p-Persistent CSMA Protocol with the Capture Effect
Throughput and Delay Analysis for a Differentiated p-Persistent CSMA Protocol with the Capture Effect
复制标题
具有捕获效应的差异化p-持续CSMA协议的吞吐量和延迟分析
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Timothy O’Farrell
中科院分区：
文献类型：
--
作者：
S. Abukharis;R. MacKenzie;Timothy O’Farrell
随着802.11无线局域网（WLAN）的广泛部署和对更高服务质量（QoS）的需求，具有服务区分的802.11e MAC被开发出来。由于无线信道的易出错性，分析衰落、阴影效应和远近效应对802.11性能的影响是实际应用中的一个基本考虑因素，本文提出了一种p-持久CSMA协议，该协议允许使用多种业务类型区分服务，并考虑到瑞利多径衰落环境下的捕获效应，建立了一个精确实用的模型。提出了一种新的分析方法来计算多种业务类型的吞吐量和分组延迟。为该新模型提供的结果表明，捕获效应在高负载系统中使吞吐量增加了32%，从而证明了在无线协议中包括捕获效应的重要性
With the extensive deployment of 802.11 wireless local area networks (WLANs) and the need for better quality of service (QoS), the 802.11e MAC with service differentiation was developed. Analysing the effect of fading, shadowing and near-far effect on the performance of 802.11 is a fundamental consideration in practical situations since the wireless channels are errorprone.This paper develops a p-persistent CSMA protocol, which allows for service differentiation by using multiple traffic types, into an accurate and practical model that takes into account the capture effect in a Rayleigh multipath fading environment. A new analytical approach is developed to calculate the throughput and packet delay for multiple traffic types. Results provided for this new model show that the capture effect increases the throughput by 32% in a highly loaded system thereby demonstrating the importance of including the capture effect in wireless protocols