Optimum Parameters for VoIP in IEEE 802.11e Wireless LAN

摘要：

IEEE 802.1 le is an enhanced standard in wireless LAN which has QoS mechanisms, EDCA and HCCA. This paper analyzes the performance of IEEE 802.11e EDCA functions through working testbeds and a large-scale simulation.EDCA has three parameters: AIFS, CW and TXOP to differentiate packets. This paper shows the effectiveness of EDCA by simple experiments. Then, we try to find the optimum values for EDCA parameters. It is interesting that default parameter values do not ensure good communication quality for VoIP communications.This paper also illustrates the results of a simulation which covering a large number of nodes. Again, it is shown that the default values are not ideal for VoIP communications on a larger scale.The results of this paper are meaningful when VoIP communications have priority over other traffic in a wireless LAN environment.

关键词： IEEE 802-1 le EDCA

作者: Ryo Kitahara Koichiro Doi Tomoya Iimura Shingo Morita Shigeki Goto

作者单位: NTT DoCoMo 3-5 Hikari-no-oka,Yokosuka City Kanagawa Prefecture, Japan Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo, JAPAN

会议类型: 国际会议

会议名称: APAN Network Research Workshop 2007(第24届亚太高速网络会议)

会议地点: 西安

会议语种:英文

页码: 75-83

在线出版日期: 2007-08-27（万方平台首次上网日期，不代表论文的发表时间）