Transport of MPEG-2 Video Traffic Over ATM Networks

这项研究的主要目标是调查资源管理和与流量相关的问题，以实现在ATM网络上高效地传输压缩视频流。这些问题包括要分配给给定业务流的网络资源的确定、压缩视频流的优先排序、网络可以实施以向各种优先级提供区分服务的调度技术的设计和管理、以及资源共享对分配给流的有效带宽和缓冲区大小的影响。为了研究上述问题，需要对压缩视频流量进行准确的表征。因此，我们将首先捕获、数字化和压缩(通过压缩标准)几个视频流(例如，电影)，从而画面动态(就场景变化、平移、缩放而言)因电影而异。这些捕获的轨迹将用于开发单个和聚合(统计多路复用)压缩视频流的流量模型。所开发的业务模型将扩展到ATM网络的入口节点之外，以包括ATM网络内部中间节点处的压缩流。性能研究(基于排队)将对混合了压缩流(mpeg-2)的干扰流量进行。密歇根州立大学的ATM试验台将用于拟议的研究。有关此项目的更多信息，请参阅我们的网址(http://www.cps.msu.edu//~hughes/mpeg-2.html))。

The primary goal of this research is to investigate resource management and traffic-related issues that will enable efficient transport of compressed video streams over an ATM network. These issues include the determination of network resources to be allocated for a given traffic stream, the prioritization of compressed video streams, the design and management of scheduling techniques that the network can implement to provide differential service to various priority levels, and the effect of resource sharing on the effective bandwidth and buffer size allocated to a stream. In order to study the aforementioned issues, an accurate characterization of compressed video traffic is required. Accordingly, we will first capture, digitize, and compress (via compression standards) several video streams (e.g., movies), whereby the picture dynamics (in terms of scene changes, panning, zooming) varies from one movie to another. These captured traces will be used to develop traffic models for single and aggregate (statistically multiplexed) compressed video streams. The traffic models developed will extend beyond the entry node of an ATM network to include compressed streams at intermediate nodes inside the ATM network. Performance studies (queueing-based) will be done of interfering traffic mixed with compressed streams (MPEG-2). The ATM testbed at Michigan State University will be used for the proposed research. Refer to our URL address (http://www.cps.msu.edu//~hughes/mpeg-2.html) for additional information about this project.