VoWLAN中基于TDMA的QoS机制  

TDMA-based quality of service mechanism for VoWLAN

作　　者：吴燕玲[1] 张丽娟[2] 潘玉茹[1] 

机构地区：[1]东莞理工学院城市学院,广东东莞523106 [2]东莞理工学院计算机学院,广东东莞523808

出　　处：《计算机应用》2011年第1期215-218,228,共5页journal of Computer Applications

基　　金：国家自然科学基金资助项目(10890095);东莞市高等院校科研机构科技计划项目(200910814038)

摘　　要：针对无线局域网语音应用缺乏可靠服务质量的情况,提出了一种基于时分多址接入的服务质量新机制。该机制采用了IEEE802.15.3无线个域网的中心调度方式,使用时分多址接入机制控制节点接入信道。在平均接入时延、时延抖动和分组丢失率三方面对IEEE802.11b、IEEE802.11 e和新方案三者的性能进行了对比。仿真结果表明,IEEE802.11b性能最差,新机制的性能在平均接入时延和分组丢失率方面比IEEE802.11 e分别改善了20%和50%左右。Wireless Local Area Networks （WLANs） has become a ubiquitous networking technology deployed everywhere. And Voice over Internet Protocol （VoIP） is one of the most popular applications and an alternative to traditional Public Switched Telephone Network （PSTN） due to its cost efficiency. Voice over WLAN （VoWLAN） is an emerging application taking advantage of the promising VoIP technology and the wide deployment of WLANs all over the world. Concerning the lack of Quality of Service （QoS） for VoWLAN application, a new QoS mechanism was proposed. This mechanism applied the central scheduling strategy inspiring from IEEE802.15.3 Wireless Personal Access Network （WPAN）, which allows all nodes to share the channel with Time Division Multiple Access （TDMA） technology. Performance on access delay, jitter, and packet loss rate were evaluated for IEEE802.11 b, IEEE802. 11 e with this proposed mechanism. Simulation results show with this proposed mechanism the access delay and the packet loss rate are improved about 20%, 50% respectively compared to IEEE802.15. 3.

关 键 词：无线局域网语音应用 时分多址接入 服务质量 无线个域网 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]