研究音频/视频服务体系结构的性能。2代理网络

A. Uyar, G. Fox
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引用次数: 10

摘要

p.1见同上,第120-127页(2005)。日益增长的网络带宽和计算能力为互联网视频会议系统提供了新的机遇。在不久的将来,除了家庭和小型办公室之外,就连手机也可以接入宽带互联网。因此,我们可以想象,越来越多的视频会议系统的使用趋势将继续下去。这需要普遍可访问和可扩展的视频会议系统,可以提供数千个并发音频和视频流。然而,在互联网上开发视频会议系统是一项具有挑战性的任务,因为音频和视频分发需要高带宽和低延迟。目前的视频会议系统如ip组播和H.323不能完全解决可扩展性和普遍可访问性的问题。我们提出了面向服务的视频会议架构GlobalMMCS,并使用事件代理中间件NaradaBrokering向大量用户提供实时音频和视频流。事件代理网络的性能对视频会议系统的成败至关重要。在本文中,我们评估了NaradaBrokering代理网络在音频/视频传输背景下的分布式设置的性能。结果表明,即使是少量的代理也可以以非常好的质量将音频/视频流传递给一千多个用户。它们还特别为GlobalMMCS的部署提供了指导方针,并为一般使用基于软件的音频/视频传输系统的可行性提供了有用的见解
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating the performance of audio/video service architecture. II. Broker network
For pt.1 see ibid., p.120-127 (2005). Increasing network bandwidth and computing power provide new opportunities for videoconferencing systems over Internet. In addition to homes and small officies, even the cell phones have broadband Internet access in the near future. Therefore, we can imagine that the trend in the increasing usage of videoconferencing systems continues. This requires universally accessible and scalable videoconferencing systems that can deliver thousands of concurrent audio and video streams. However, developing videoconferencing systems over Internet is a challenging task, since audio and video distribution requires high bandwidth and low latency. Current videoconferencing systems such as IP-Multicast and H.323 can not fully address the problem of scalability and universal accessibility. We propose service oriented architecture for videoconferencing, GlobalMMCS, and use an event brokering middleware, NaradaBrokering, to deliver real-time audio and video streams to high number of users. The performance of the event brokering network is critical to the success of this videoconferencing system. In this paper, we evaluate the performance of NaradaBrokering broker network in distributed settings in the context of audio/video delivery. The results demonstrate that even small number of brokers can deliver audio/video streams to more than a thousand users with very good quality. They also provide guidelines for the deployment of GlobalMMCS in particular, and they provide useful insights for the feasibility of using software based audio/video delivery systems in general
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