| dc.description.abstract | As the growth of bandwidth of Internet, the delivery of multimedia stream increases too. Because multimedia stream has huge amount of data, uses more bandwidth, be delivered through WAN and need to protect the copyrights of the origin content provider. So the common method is to use the Content Delivery Network (CDN), the peers must register to the origin content provider first, then the CDN will redirect the request of peers to the nearest replica/cache server to share the load of the video server, reduce the use of bandwidth and protect the copyrights of the origin content provider.
Someone proposed Peer-to-Peer Network to transmit multimedia stream, because p2p network share data with each other, the overload will not happen to any video server. The system has better scalability and ability of fault tolerant. When the data shared with each other, the p2p network can not protect the copyrights of the origin content provider.
Using the replication-aware CDN-P2P architecture, the external peer cache with server function can provide service to other peers to decrease the load of the replica/cache server like p2p network, peers must get the copy permission of the origin content provider to download contents from the nearest replica/cache server like CDN.
Under the replication-aware CDN-P2P architecture, there is external peer cache can provide services, it is different with the environment only having replica/cache server. In this paper, we hypothesize that (1)CDN provider provides reward mechanism to the peers who are willing to be the peer cache (2)peers will be off line after finishing the video(3)peers request to download contents from peer cache which has the closest arrival time. We propose a better cache replacement scheme of replica/cache server.
We analyze and compare the hit ratio of replica/cache server with and without external peer cache service and proposed a HPLRU scheme used external peer cache. We also simulate the result of cache replacement with variant peer cache service time, peer cache rate and video popularity. The HPLRU scheme shows the better cache hit ratio than other schemes under the consideration of added external peer cache. | en_US |