移动流媒体内容分发子系统的研究设计

Research and design of a content delivery subsystem of mobile streaming media

针对移动流媒体业务中网络拥塞、响应速度慢的问题,设计了基于内容分发网络CDN的网络结构体系,并针对MSM-CDN内容分发给出了保证边缘缓存服务器容量的缓存容量保留策略;对于保持CDN地域级节点和CDN边缘节点与CDN中心节点的内容一致性,提出了可灵活设置内容绝对访问量和内容相对访问量门限值的内容更新实施策略。所设计的移动流媒体内容分发子系统能够适应移动流媒体系统应用中访问量和访问内容大幅变化的情况,避免了骨干网络带宽占用及内容服务器超载的问题,能够为用户提供高质量的流媒体服务。

In this paper we designed a distributing CDN network structure aiming at the problem of network inconsistency and slowness of mobile streaming media, which provided a reserved strategy to support the edge server emphasizing the content delivery of MSM - CDN. A renewed method to keep the consistence of the CDN regional pitch point, the CDN edge pitch point and the CDN central pitch point was also developed. It will reduce the transmitting capacity at the network and the load of CDN central server so as to improve the speed of interaction. It also solves such problems as the occupying of main network wideband, the over-load of content server, therefore provides high - qualified service for the users.