Content distribution method for minimizing cross-domain flows in CDN-P2P fusion network

Abstract

The invention provides a content distribution method for minimizing cross-domain flows in a CDN-P2P fusion network. According to the method, a network scene comprises a CDN replica server, CDN content buffering servers, local tracker servers (Loc-tracker servers) and user nodes. The local tracker servers are established through an ISP. One the basis of topological information, such as link delay, link cost and the number of crossed operators, collected by the Loc-tracker servers, a path and the node with lowest transmission cost are calculated and selected, and the total cost of content distribution is controlled, so that the servers are pushed to select the nodes with low transmission cost on same ISP domains, and the purpose of optimizing node selection is achieved. The Loc-tracker servers are used for managing the nodes in local ISP domains and the CDN content buffering servers. Information exchanging is performed among the Loc-tracker servers in a P2P mode, and therefore an overlay network is formed. Generation of the cross-domain flows can be effectively reduced, operating cost of the network is reduced, waste of bandwidth resources of a backbone network is reduced, and the efficiency of the content distribution is improved.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to an optimized control method for cross-domain traffic in a CDN-P2P converged content distribution network. Background technique [0002] CDN (Content Distribution Network) network and P2P (peer-to-peer) network are the most popular content distribution technologies, but both have many defects. CDN has high reliability but poor scalability, and it is difficult to fundamentally improve distribution. Efficiency, while P2P has strong scalability, but poor stability, which can easily cause backbone network congestion. Therefore, the integration of CDN and P2P technology can complement its own shortcomings on the one hand, and transform the traditional structure of CDN or P2P, on the other hand, it can also make a perfect combination of the scalability of P2P and the reliability and manageability of CDN. Therefore, the CDN-P2P converged content distribution network is a c...

AI Technical Summary

Problems solved by technology

[0004] In the current CDN-P2P fusion network, the selection of the optimal node is based on a random algorithm. The range of node selection is very wide without any regionalization, and the peer selection of P2P applications is based on the layered network, which cannot consider the connection in the physical network. Utilization of resources such as relationships and bandwidth

Therefore, unreasonable cross-domain traffic floods the entire network, consumes huge network bandwidth, overwhelms the network infrastructure, and continuously increases ISP cross-domain costs

Aiming at the consumption of ISP network infrastructure by a large amount of ISP cross-domain traffic, operators have adopted various blocking measures such as blocking ports, traffic shaping, and bandwidth control, which caused problems such as excessive download time and a significant decline in user satisfaction. CDN-P2P Converged network users have also taken corresponding measures to carry out anti-blocking, presenting a state of confrontation between users and ISPs, seriously affecting the development of the Internet

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