Integrated P2P (Peer-To-Peer) VOD (Video-On-Demand) system and partner node selecting method

Abstract

The invention discloses an integrated P2P (Peer-To-Peer) VOD (Video-On-Demand) system and a partner node selecting method. The invention adopts network topology comprising a directory server, a content server and client nodes, wherein the directory server searches nodes in a node list according to user VOD segment information in a request of a client node and returns a node list containing a search result, and the client node selects an optimal node according to the returned node list, sends a request for establishing a connection and uses the remaining nodes as spare father nodes. The methodcomprises the following steps of: receiving a node with a connection request, judging whether the condition for establishing the connection is allowable and establishing the connection with the requesting node and enabling the requesting node to start receiving video data if the condition for establishing the connection is allowable; reselecting from the spare father nodes if the connection is unsuccessfully established; and directly requesting to the content server for establishing a connection by the requesting client node if all the spare father nodes fail. According to the invention, the extendible network node topology can be constructed so that the system has rapid interrupt recovery capability.

Description

technical field [0001] The invention relates to the technical field of peer-to-peer (Peer-to-Peer, P2P) network streaming media, in particular to a centralized peer-to-peer on-demand system and a partner node selection method. Background technique [0002] Streaming media refers to playing media formats, such as audio, video or multimedia files, on the Internet (Internet) / Intranet (Intranet) by means of streaming transmission. Streaming transmission parses the entire audio, video, and 3D media and other multimedia files into compressed packets through a specific compression method, and transmits them sequentially or in real time from the video server to the user's computer. The client can play the video without downloading the full video. Compared with the simple download method, this streaming transmission method of downloading and playing multimedia files not only greatly shortens the start-up delay, but also greatly reduces the demand for system cache capacity, greatly r...

AI Technical Summary

Problems solved by technology

[0006] 1) Network controllability is not considered. VOD is different from other types of streaming media applications. Most video content has copyright issues, and all participating nodes of the entire tree maintain the entire network information, which increases the uncontrollability;

[0007] 2) Network scalability is not considered. When a node in the tree is interrupted or blocked, all nodes in the subtree may be interrupted, and higher-level nodes require higher output bandwidth to ensure that the depth of the tree does not exceed too deep;

[0008] 3) Node interaction is not considered. Most VOD systems only implement asynchronous VOD, and do not consider operations such as program progress interaction. Frequent dynamic behavior may lead to continuous destruction of the network topology and affect the streaming media transmission of the entire system.

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