US-Egypt Cooperative Research: A New Quality of Service Video Conferencing Model Across the Internet

0211036 Elzarki描述：该奖项是为了支持一个联合研究项目，该项目由加州大学欧文分校信息与计算机科学系的Magda El Zarki博士和埃及开罗电子研究所（ERI）计算机与系统系的Hussein Eissa博士共同完成。 该项目涉及因特网上的电视会议。 这两位研究人员计划为区分服务（diffserv）体系结构开发一个特定的模型，并通过模拟来评估这个模型。 他们将探索在OPNET仿真器中实现diffserv架构，并研究该架构在实时和非实时流量下的性能。 他们计划通过使用视频会议应用程序捕获生成的数据包来分析视频/音频特性，以绘制数据包PDF曲线（数据包大小和数据包到达间隔时间）。 新提出的模型是通过在边缘设备上使用一些Diffserv简单块来保证所需的质量。 它还在可能的情况下使用IP组播机制，以节省更多的网络资源。新模型依赖于对轮廓外的流进行整形，在实时标记的分组的情况下丢弃分组，并且在非实时标记的分组的情况下重新标记分组。 通过在边缘设备中实现这些简单的模块，核心路由器上的过载将被最小化。范围：这个项目将提供对互联网上视频/音频流的更好理解。 并且应该推进多媒体联网的技术水平。该项目将导致美国和埃及机构之间的强有力合作。这两个PI之间的合作可能是富有成效的，因为他们之前有过互动，而Eissa博士在2000年在美国进行博士研究。 加州大学欧文分校和ERI工作人员的访问将对这两个机构有益，并将为埃及的研究生提供帮助，特别是在实验和模拟部分任务方面。

0211036ElzarkiDescription: This award is for support of a joint research project by Dr. Magda El Zarki, Department of Information and Computer Sciences at the University of California at Irvine, Irvine, California and Dr. Hussein Eissa, Computer and Systems Department at the Electronics Research Institute (ERI), Cairo, Egypt. The project addresses videoconferencing over the Internet. The two investigators plan to develop a particular model for a differentiated services (diffserv) architecture and to evaluate this model through simulation. They will explore the implementation of the diffserv architecture in the OPNET simulator, and study the performance of the architecture with both real-time and non-real-time traffic. They plan to analyze the video/audio characteristics by using videoconferencing applications & capturing the generated packets to draw the packet PDF curves (packet size and packet interarrival time). The new proposed model is to guarantee the required quality by using some of the Diffserv simple blocks at edge devices. It also uses the IP Multicast mechanism where possible, to save more network resources. The new model is to rely on shaping the out-of-profile streams, dropping packets in case of real-time marked packets, and re-marking packets in case of non real-time marked packets. By implementing these simple blocks in the edge devices, the overload on the core routers will be minimized.Scope:This project will provide better understanding of video/audio streams over the Internet. and should advance the state of art in multimedia networking. The project will lead to a strong collaboration between the U.S. and Egyptian institutions. The collaboration between the two PIs is likely to be productive since they have had prior interaction, while Dr. Eissa was carrying out his doctorate research in the year 2000 in the United States. The visits by the staff from UC at Irvine and the ERI will be beneficial to the two institutions, and will help graduate students in Egypt, especially with the experimental and simulation component tasks.