Network boundary treatment method

Abstract

The present invention discloses a method of network boundary disposal, which comprises: a signaling channel is established between a first SIP terminal and a second SIP terminal; and a media cannel is established between the first SIP terminal and the second SIP terminal. The network boundary disposal method provided by the present invention can realize that a conversation edge controller is adopted to conduct firewall or NAT crossing with no change to the prior network rack. The method is a network boundary disposal mechanism which is widely used for the network systems based on SIP such as the 3G core network and the next generation network.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a network boundary processing method based on Session Initiation Protocol (Session Initiation Protocol, SIP). Background technique [0002] With the deployment of the 3G network, and even accumulated some experience in networking and operation, the standard of the 3G network is still developing and perfecting, currently going through six stages from R99 to R7. But boundary problems such as private address translation, firewall penetration, and topology hiding still exist. [0003] First of all, in order to serve more users, the 3G core network must support the existing general packet radio service (General Packet Radio Service, GPRS) / universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) user access, wireless local area network (WirelessLAN , WLAN) user access, even fixed users. There are great differences between these diff...

AI Technical Summary

Problems solved by technology

In theory, packet filtering firewalls can be configured to judge based on any part of the protocol header, but most filters are configured to filter only the most important data fields

[0009] In the 3G core network, unsolicited incoming calls are adopted, and the calling party cannot predict the network situation of the called party. If the called party is behind a firewall, even if a port on the firewall is opened to receive call signaling, After the call is established, the voice and video channels are allocated dynamically, so they may not be transmitted due to the firewall

However, the functions of these functional units are very repetitive. When the functions change, many peripheral interfaces are involved, which is not conducive to the heterogeneous integration and upgrade of 3G networks.

[0011] The Internet Engineering Task Force (IETF) proposed the use of session edge controller (Session Board Controller, SBC) to solve the problem of address mapping and firewall penetration, but it is mainly aimed at softswitch networks, especially in enterprise networks. Penetrating the problem, but only defines the relevant functional requirements, and does not elaborate on its implementation mechanism

In addition, there are various network boundary problems in various SIP-based network systems such as NGN and multimedia enterprise communications.

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