Content Delivery Network with Hot-Video Broadcasting and Peer-to-Peer Approach

摘要

With the growth of bandwidth, video/audio streaming services have become popular, and are considered a future killer application on the Internet. Many researches proposed several possible technologies for streaming services, such as hot-video broadcasting, caching, content delivery network (CDN), and peer-to-peer communications. In the paper, we propose a new streaming architecture combining the above technologies. We construct our CDN using two-level hashing, which the first level maps user requests to video servers, and in the second level, the selected video servers choose proxy cache servers for the requests. Once receiving the user request, the cache server first checks whether it has the requested video data. If the data are available, the server transmits them to the user over hot-video broadcasting. Otherwise, the server connects to the original video server for the data, which are then broadcast to the user. In addition, the server saves the user information in its hash table. When a user request for the same video arrives, the server can direct the request to the former user with the data, so as to save bandwidth. Finally, we have realized our architecture using Java language.