DESIGN OF DISTRIBUTED PREFETCHING PROTOCOL IN PUSH-TO-PEER VIDEO-ON-DEMAND SYSTEM

ABSTARCT: Peer-to-peer networks have to streaming the video o n the Internet. In Peer-to-peer systems, peer interest plays the central role in content transmis sion and storage and each peer pulls content only i f the content is of interest. Once pulled content has bee n stored locally, that peer may then in turn distri bute this content to yet other self-interested peers. So , this system has to make more congestion and serve r load in the network. In P2P streaming system, the upstre am bandwidth of peers are larger than video playback rate. This system does not overcome the upstream bandwidth limitation by server based stream delivery. But, the push-to-peer system does not rel y on content servers except in the push phase. So, this system can overcome the bandwidth limitation. In this system, the uplink bandwidth is smaller than vid eo playback rate. In this project is content placement and associated pull policies that allow the optima l use of uplink bandwidth in push-to-peer video-on-demand system. The initial content placement increases th e content availability and improves the use of peer u plink bandwidth. The mostly required videos are proactively pushed to the set-top-boxes in the digi tal subscriber line networks during time of low net work utilization that is in the early morning. There are two approaches used for content placement and pull policies, which are Full striping scheme and Code-b ased placement scheme. The client can easily download and play out video from set-top-boxes. So, we can reduce server load, network load and downloading time. In Full striping scheme, videos a re strip into video blocks and push the distinct vi deo block into the set-top-box. This system has to prov ide high quality of video streaming and to reduce t he client’s waiting time. This system can reduce the s erver load, network load and congestion. In Code-based placement scheme, videos are encoded into coded symbol by using rate less code algorithm. This approach could eliminate the box failure in full st riping scheme. When the client’s required data is n ot available in the set-top-box, then the distributed prefetching protocol used to directly connect clien t to the video server and streaming the video from video ser ver to client.