Method and system for improving P2P connection rate

Abstract

The invention discloses a method and a system for improving P2P connection rate. When establishing P2P connection with a second opposite terminal, a first opposite terminal judges whether the first opposite terminal is one end which initiates connection firstly; if yes, first connection information comprising a first TTL value is generated, and the first TTL value is larger than the hop count A from the first opposite end to the corresponding first NAT and smaller than the hop count B from the first opposite end to the second opposite end; a first opposite terminal judges whether the first opposite end is a terminal which initiates connection first or not, if yes, first connection information comprising a first TTL value is generated, and a first NAT establishes a mapping relation betweenthe first opposite end and a second opposite end according to the first connection information. At the moment, the first connection information is automatically lost because the first TTL value is attenuated to 0 before reaching the second NAT, so that the pre-used port number reserved by the second NAT for the second opposite end is not damaged, and the P2P connection success rate is effectivelyimproved.

Description

technical field [0001] The invention relates to the field of computer networks, in particular to a method and system for improving the P2P connection rate. Background technique [0002] The full English name of NAT is Network Address Translation, which means Network Address Translation in Chinese. It is an IETF (Internet Engineering Task Force, Internet Engineering Task Force) standard, which allows an entire organization to appear on the Internet with a public IP (Internet Protocol) address. superior. As the name suggests, it is a technology that translates internal private network addresses (IP addresses) into legal network IP addresses. Therefore, we can think that, to a certain extent, NAT can effectively solve the problem of insufficient public network addresses. [0003] A very important prerequisite in P2P transmission is to obtain the public IP of the host on the intranet and the port mapped on the NAT. If you want to obtain the public IP:Port of the intranet host...

AI Technical Summary

Problems solved by technology

However, in fog computing, trillions of nodes perform related operations, which will put pressure on communication servers and backbone networks, especially for central / scheduling servers, which will consume additional resources such as bandwidth, CPU, and memory.

[0005] By analyzing the data returned by a large number of nodes, some of the NATs (probably 15% to 20%) have the following characteristics: the pre-used port will cause this pre-used port when it is accessed by other network devices. The used port cannot be allocated temporarily, so the prediction of Symmetric NAT is invalid

[0006] When initiating a connection in P2P, one end (Peer1) will always initiate a connection later than the other end (Peer2). For some NATs, if Peer1 initiates a connection first, when the connection information reaches the second NAT, it will send the second The pre-used port reserved for Peer2 on the NAT is destroyed, making it impossible to establish a P2P connection between Peer1 and Peer2, which will affect the P2P connection success rate

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