Stream Caching Techniques for New Generation CDNs and Its Ubiquitous Extension

本研究主要集中在两个方面：(1)高效的流媒体缓存技术；(2)高效的流媒体分发技术，特别是针对数字视频内容在互联网上的流媒体分发。(2003)关于分层编码压缩的流媒体内容的分布式缓存技术，我们提出了一种在内容服务器存储约束下的流媒体内容的优化分发方法。(2004)作为对2003年S结果的扩展，我们针对流内容的分布式检索、分布式复制和缓存一致性管理提出了三种新的方法。(2005)我们将框架扩展为一种流媒体内容的协作缓存方法，可以应用于移动和泛在环境。对于每一项成果，我们都在许多国内和国际会议上发表了我们的贡献。我们还出版了三本p…在流媒体的内容分发方面，我们每年都取得了下一步的成果。(2003)针对IP电视广播中的节点故障问题，我们提出了一种新的主动路由维护方法，该方法在不增加信令开销的情况下，能够在节点发生故障时实现快速的路由恢复。(2004)为了满足互联网连接从旧的拨号调制解调器到快速光纤到家庭的各种类型的客户，我们通过结合分层编码建立了一种新的IP广播方案，该方案对连接分集问题非常灵活。(2005)作为这项研究的最后一年，我们合并了两年的结果，并在PC上实现了他们的软件。我们在实际的互联网上进行了评估实验，确实验证了我们方法的有效性。对于每个结果，。我们在许多国内和国际会议上发表了我们的投稿。目前，已提交了两篇论文，目前正在审查过程中。较少

This research had focused on two topics ; (1)efficient caching techniques of streaming media, and (2) efficient distribution techniques of streaming media, especially aiming at streaming distribution of digital video contents over the Internet.With regards to the stream caching, we had achieved next results per year. (2003) On the distributed caching technology of streaming contents compressed by layered coding, we had proposed an optimum distribution method of the streaming contents under the storage constraint of content servers. (2004) As extensions to 2003's result, we had proposed three new methods about distributed retrieval, distributed replication and cache consistency management of streaming contents. (2005) We had extended our framework to a cooperative caching method of streaming contents, which can be applied to mobile and ubiquitous environment. For each result, we had published our contributions at many domestic and international conferences. We had also published three p … More apers and are now preparing submission of one new paper.With regards to the content distribution of streaming media, we had achieved next results per year. (2003) For the node failure problem in IP TV broadcasting, we had proposed a novel proactive route maintenance method, which enables fast route recovery when the node failure happens without causing heavy signaling overheads. (2004) In order to satisfy various kinds of customers whose internet connections are quite diverse from old dialup modems to fast fiber to the home, we had established a new IP broadcasting scheme which is quite flexible to the connection diversity problem by incorporating layered coding. (2005) As a last year of this research, we had merged two years' results and had brought their software implementation on the PCs. We carried out evaluation experiments over the actual internet and had indeed verified effectiveness of our approached. For each result,. we had published our contributions at many domestic and international conferences. Currently, two papers were submitted and they are now in review process. Less