Differential VoIP service in Wi-Fi networks and priority QoS maps

被引：0
|
作者：
Dao, NT [1 ]
Malaney, RA [1 ]
Exposito, E [1 ]
Wei, X [1 ]
机构：
[1] Natl ICT Australia, Eveleigh, NSW 1430, Australia
来源：
GLOBECOM '05: IEEE Global Telecommunications Conference, Vols 1-6: DISCOVERY PAST AND FUTURE | 2005年
关键词：
802.11; voice over IP; QoS; differential service;
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Differential VoIP services for Wi-Fi will greatly enhance the experience of mobile wireless users who have requested premium service for their VoIP applications. In this work we present detailed simulations of modified 802.11b protocols that purport to provide differential service to wireless VoIP users. The modified protocol we identify as providing the best differential service - whilst maintaining the least starvation to best effort users - involves a modified minimum contention window, combined with a modified back-off time. A detailed differential VoIP capacity analysis of this modified protocol is presented. Also, we introduce the notion of a "Priority Service QoS Map" for wireless VoIP. Such a map is a two dimensional representation of the VoIP QoS metrics available to a mobile priority VoIP user, as a function of location. We outline how our VoIP capacity analysis is used to construct a Priority Service QoS Map, and discuss the practical benefits of relaying such maps to mobile users of wireless VoIP.
引用
收藏
页码：2653 / 2657
页数：5
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