Stored stream media data downloading method based on elastic overlapping network

Abstract

The invention relates to a method for downloading stored streaming media data based on an elastomeric overlay network: 1) a data request node sends a request for downloading target data to a P2P network; 2) the request node inquires all target nodes in the elastomeric overlay network according to the address of the target nodes, and after being matched, the elastomeric overlay network returns the application layer routing table entry of all the target nodes to the request node; 3) the request node selects n target node(s) from all the target nodes according to the application layer routing table entry and the nearly reached maximum time delay; 4) the n target node(s) selected from step 3) is / are taken as P2P peer end(s), and all the file blocks of the target data are downloaded according to the route in the routing table entry returned by the elastomeric overlay network. The method of the invention reduces the probing workload at P2P level in the streaming media service, and improves the quality of the subjective perception of the user; furthermore, the invention provides a fuzzy matching method which can route the data to the nodes which are not on the elastomeric overlay network, thus enhancing the robustness of the network and broadening the application range of the elastomeric overlay network.

Description

technical field [0001] The invention relates to the technical field of information network, in particular to a network downloading method for storing stream media data between geographically dispersed computing nodes that need to cooperate with each other. Background technique [0002] At present, in the information network, the video-on-demand service form is gradually accepted by people. This service form first appeared in the 1990s. At that time, the service mode of client-server was adopted, which was limited by the service capability of the server. , that is, the limitations of processing power, storage space, and network interface speed; in order to solve the server bottleneck problem, at the beginning of the 21st century, a peer-to-peer (P2P) computing model appeared in the computer world, initially used for file transfer and In recent years, this technology has been used in streaming media (storage streaming media, live streaming media) and has achieved certain resul...

AI Technical Summary

Problems solved by technology

In the prior art, one method is that the central index server directly returns n peers for use by the requesting end. The disadvantage is that it is subject to the policy of the central indexing server and cannot reflect various network parameters between the requesting end and the peers. ;The second method is the idea of ​​combining data request and routing, using the flooding method. There is no clear definition of the number of peers in this method. The disadvantage is that there is no guarantee for whether the data can be found, and the quality of service limited by the nature of its approach

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