The capability of the EDCA mechanism to support voice traffic in a mixed voice/data transmission over 802.11e WLANs - an experimental investigation

32nd IEEE Conference on Local Computer Networks (LCN 2007) Pub Date : 2007-10-15 DOI:10.1109/LCN.2007.152

M. Narbutt, M. Davis

{"title":"The capability of the EDCA mechanism to support voice traffic in a mixed voice/data transmission over 802.11e WLANs - an experimental investigation","authors":"M. Narbutt, M. Davis","doi":"10.1109/LCN.2007.152","DOIUrl":null,"url":null,"abstract":"In this paper we experimentally evaluate the capability of the EDCA mechanism to support voice traffic in a mixed voice/data transmission over 802.1 le WLANs. In particular we investigate how real-time voice transmission can be supported by tuning four EDCA parameters, namely AIFSN, CWmin , CWmax, and TXOP and how this impacts on background data transmission. The experimental set-up involves fifteen VoIP terminals sending bi-directional traffic between wired and wireless subnets and another station injecting various types of heavy background loads to the wireless subnet. End-to-end voice transmission quality is predicted from time-varying transmission impairments with the use of the latest appendix to the ITU-T E-model. Our experimental results show that the AIFSN parameter more effectively protects voice calls against background data traffic than CWmin. We also demonstrate that tuning of the TXOP parameter does not improve the quality of voice transmission. To the best of our knowledge, this is the first experimental investigation regarding tuning of MAC layer EDCA parameters in a real 802.1 le WLAN network from the perspective of end-to-end voice transmission quality and end user satisfaction.","PeriodicalId":333233,"journal":{"name":"32nd IEEE Conference on Local Computer Networks (LCN 2007)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"32nd IEEE Conference on Local Computer Networks (LCN 2007)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/LCN.2007.152","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 12

Abstract

In this paper we experimentally evaluate the capability of the EDCA mechanism to support voice traffic in a mixed voice/data transmission over 802.1 le WLANs. In particular we investigate how real-time voice transmission can be supported by tuning four EDCA parameters, namely AIFSN, CWmin , CWmax, and TXOP and how this impacts on background data transmission. The experimental set-up involves fifteen VoIP terminals sending bi-directional traffic between wired and wireless subnets and another station injecting various types of heavy background loads to the wireless subnet. End-to-end voice transmission quality is predicted from time-varying transmission impairments with the use of the latest appendix to the ITU-T E-model. Our experimental results show that the AIFSN parameter more effectively protects voice calls against background data traffic than CWmin. We also demonstrate that tuning of the TXOP parameter does not improve the quality of voice transmission. To the best of our knowledge, this is the first experimental investigation regarding tuning of MAC layer EDCA parameters in a real 802.1 le WLAN network from the perspective of end-to-end voice transmission quality and end user satisfaction.

查看原文本刊更多论文

EDCA机制在802.11e无线局域网中支持混合语音/数据传输的语音流量的能力-一项实验性研究

在本文中，我们通过实验评估了EDCA机制在802.1 le无线局域网中支持混合语音/数据传输的语音流量的能力。我们特别研究了如何通过调整四个EDCA参数，即AIFSN、CWmin、CWmax和TXOP来支持实时语音传输，以及这对后台数据传输的影响。实验设置包括15个VoIP终端，在有线和无线子网之间发送双向流量，另一个站向无线子网注入各种类型的繁重后台负载。通过使用ITU-T e模型的最新附录，根据时变传输损伤预测端到端语音传输质量。实验结果表明，AIFSN参数比CWmin更能有效地保护语音呼叫免受后台数据流量的影响。我们还证明了调谐TXOP参数并不能提高语音传输的质量。据我们所知，这是第一次从端到端语音传输质量和最终用户满意度的角度对真实802.1 le WLAN网络中MAC层EDCA参数进行调优的实验研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

32nd IEEE Conference on Local Computer Networks (LCN 2007)

自引率

0.00%

发文量