Private network detection and traverse compounding method for P2P (Peer-to-Peer) network application system

Abstract

The invention discloses a private network detection and traverse compounding method for a P2P (Peer-to-Peer) network application system, which comprises the following steps of: firstly, setting different priority levels for tree methods, namely UPNP (Universal Plug-n-Play), STUN (Simple Traversal of UDP (User Datagram Protocol) over NATs) and TURN (Traversal Using Relay NAT (Network Address Translation)), with the sequence as the UPNP, the STUN and the TURN; and detecting and classifying networks where nodes are positioned; secondly, if the detection result shows that the open of external nodes can be realized by a network environment where the nodes are positioned through the UPNP technology, realizing the NAT traverse of internal nodes of the network by using the UPNP technology and otherwise executing the third step; thirdly, if the network environment supports the STUN technology, realizing the private network traverse of the nodes by using the STUN technology and otherwise executing the fourth step; and fourthly, if the network environment supports the TURN technology, realizing the private network traverse of the nodes by adopting the TURN technology. Compared with single private network traverse method, the method disclosed by the invention has better adaptability and traversing rate, can be used for improving the data sharing efficiency of the P2P system and provides technical assurance for the large-scale and high-capacity P2P application system.

Description

technical field [0001] The invention belongs to the technical field of large-scale network applications, and relates to a composite method for private network detection and traversal in a P2P network application system. Background technique [0002] P2P (Peer-to-Peer, point-to-point) technology occupies an important position in many network application systems (such as live video, video on demand, file download, network security, etc.). The prerequisite for improving the performance of the P2P system is the interconnection and intercommunication capability between the system nodes. The characteristics of real networks determine the importance of NAT detection methods and traversal methods in P2P systems. Traditional network detection and traversal methods generally provide targeted solutions for a specific application, but with the increase in network complexity and the high requirements of P2P systems for private network connectivity indicators, it is necessary to design a...

AI Technical Summary

Problems solved by technology

This method cannot provide stable internal and external network address mapping for network nodes hidden behind symmetric NAT

TURN technology is implemented by using the transit service of a specific public network server, such as figure 2 As shown, it completely solves the problem of multi-layer network nesting, but completely uses the intermediate server to forward data so that the intermediate server becomes the performance bottleneck and single-point single-point obstacle of the system, and it is difficult to realize the system's support for large transmission volume

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