A method for traversing subnet and subnet traversing system

Abstract

The invention discloses a subnet traversal method and a subnet traversal system. In the method, a subnet server is configured in the subnet, a public network management server is configured in the public network, and the calling subnet server and the called subnet server Channels are established between network servers, and when the calling subnet user terminal communicates with the called subnet user terminal, the established channel is used for data interaction. The system includes a public network and a call-related subnet, the public network includes a public network management server, the subnet includes a subnet user terminal, a subnet server and a subnet network address translator NAT, the subnet server and The public network server is used to establish communication channels between subnet user terminals that can pass through different subnets, and establish call connections. By using the method and system of the present invention, it is not necessary to replace or upgrade the network address translator (NAT) of the subnet, nor to modify the client program of the subnet access user terminal, so that the call can traverse the subnet.

Description

technical field [0001] The invention relates to a next generation network (NGN) traversal technology, in particular to a subnet traversal method and a subnet traversal system. Background technique [0002] At present, the NGN network is gradually moving from experiment to commercial use. Many practical problems have been encountered in the application process, especially the access problem of NGN users. Since NGN is a network based on packet network, access users are addressed by IP addresses. , the actual situation of the current NGN network is that due to various reasons such as IP address shortage and security, a large number of subnets on the Internet have basically adopted a network address translator (NAT, Network Address Translation) through which private IP addresses pass through the egress. When user terminals in the network communicate, the communication protocol needs to pass through the NAT of the subnet, and most of the initial NAT only supports data application...

AI Technical Summary

Problems solved by technology

[0008] The shortcoming of prior art two: this mode has the same shortcoming with prior art one, because a large amount of NATs do not support MIDCOM agreement on the Internet at present, so will utilize the MIDCOM mode to realize traversing subnet NAT and need to change or upgrade the NAT of subnet, like this It will increase a lot of cost, and it will take up a lot of NAT resources, which will reduce the efficiency of network usage

[0016] The STUN method also needs to install the STUNCLIENT application program on each user terminal in the subnet, which wastes a lot of resources for users and causes inconvenience for users

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