QoS support for VoIP traffic to prepare emergency

2004 International Symposium on Applications and the Internet Workshops. 2004 Workshops. Pub Date : 2004-01-26 DOI:10.1109/SAINTW.2004.1268593

M. Noro, Takahiro Kikuchi, K. Baba, H. Sunahara, S. Shimojo

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引用次数: 4

Abstract

Emergency communication support on the Internet is an important task. In the event of an emergency, such as a disaster, accepting as many VoIP calls as possible in limited bandwidth is an important requirement. Another important requirement is providing high quality service for important communications (ex. 911 services in the US). But, for non-emergency communication, the number of sessions (calls) that can be supported is much more important than the quality of each session. SIP supports various kinds of media; not only voice but also video can be used. In a multimedia session, it is not necessary to guarantee quality of all media for normal communications in an emergency situation. So, packets that contain video data or high quality voice data can be dropped in a very congested network. Diffserv AF service is suitable to realize this kind of quality policy. We propose a scheme which provides high quality service for important VoIP communication sessions and minimum quality for normal sessions using Diffserv AF service and a call admission method based on observing VoIP flow information and a log of SIP messages.

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QoS支持，为VoIP话务做好应急准备

互联网应急通信保障是一项重要任务。在紧急情况下，例如灾难，在有限的带宽内接受尽可能多的VoIP呼叫是一项重要要求。另一个重要的要求是为重要通信提供高质量的服务(例如美国的911服务)。但是，对于非紧急通信，可以支持的会话(呼叫)的数量比每个会话的质量重要得多。SIP支持多种媒体;不仅可以使用语音，还可以使用视频。在多媒体会话中，没有必要保证在紧急情况下正常通信的所有媒体的质量。因此，包含视频数据或高质量语音数据的数据包可能会在非常拥塞的网络中被丢弃。差别化服务适合实现这种质量方针。本文提出了一种利用Diffserv AF服务为重要的VoIP通信会话提供高质量服务、为普通会话提供最低质量服务的方案，并提出了一种基于VoIP流信息观察和SIP消息日志的呼叫接纳方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2004 International Symposium on Applications and the Internet Workshops. 2004 Workshops.

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