p2p on-demand system and method

Abstract

The invention discloses a P2P on-demand system and method, wherein the system includes an edge server, a directory server, a push server and a playback node; the directory server is used to store video parameters corresponding to each video, and the video parameters include erasure code thresholds and coded segments The number of bytes and url; the push server is used to obtain video data from the edge server and divide it into several data blocks, and use [N, k] erasure code to encode each data block into N coded segments, where k is the erasure code Threshold, the number of bytes of each encoded segment is the number of encoded segment bytes, the playback node is used to receive on-demand requests, the on-demand request includes the url of the video, use the url to obtain the video parameters corresponding to the video from the directory server, and obtain the encoded segments from the push server And use the erasure code threshold and the byte count of the encoded segment to decode the encoded segment and play it. The invention has the advantages of simple realization mode, low cost, less occupied bandwidth resource and improved broadcast start speed.

Description

technical field [0001] The present invention relates to the technical field of video-on-demand, in particular to a P2P (Peer to Peer, peer-to-peer network) on-demand system and method based on CDN (content distribution network) infrastructure. Background technique [0002] The full name of CDN is Content Delivery Network, that is, content distribution network. The basic idea is to avoid bottlenecks and links on the Internet that may affect the speed and stability of data transmission as much as possible, so as to make content transmission faster and more stable. By placing a layer of intelligent virtual network based on the existing Internet based on node servers placed everywhere in the network, the CDN system can real-time according to the network traffic and the connection of each node, the load status, the distance to the user and the response time and other comprehensive information to redirect the user's request to the service node closest to the user. Its purpose is...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a traditional CDN infrastructure based on the traditional CDN infrastructure to overcome the shortcomings of the existing P2P on-demand system, such as complex implementation methods, high implementation costs, large bandwidth resources, and slow start-up speed. A P2P on-demand system and method that can efficiently utilize unreliable nodes for P2P transmission to reduce implementation costs and save bandwidth resources

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