Session method and apparatus based on session initiation protocol

A technology of initial protocol and purpose, applied in the field of session method and equipment based on session initiation protocol, can solve the problems of continuous upgrading, ALG cannot take effect, STUN technology is difficult to traverse NAT function, etc., to achieve the effect of simplifying networking

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A technology of initial protocol and purpose, applied in the field of session method and equipment based on session initiation protocol, can solve the problems of continuous upgrading, ALG cannot take effect, STUN technology is difficult to traverse NAT function, etc., to achieve the effect of simplifying networking

CN101552848AActive Publication Date: 2009-10-07NEW H3C TECH CO LTD

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[0063] The SIP-based session method and equipment provided by the embodiments of the present invention expand and improve the existing SIP protocol, so that SIP messages can be passed through the NAT gateway based on the SIP mechanism itself, and media packets are encapsulated in SIP messages. It is sent to the opposite end of the session, thereby realizing the NAT traversal of the media message, so that the UA in the private network can have a session with the UA in other private or public networks. The present invention will be further described through specific embodiments below in conjunction with the accompanying drawings.

[0064] Please refer to image 3 , in the SIP-based session method of the embodiment of the present invention, the UA in the private network is connected to the public network through the NAT gateway, and the session method includes the following steps:

[0065] Step 31, the UA establishes and maintains the correspondence between the first IP address / ...

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Abstract

The present invention provides a session method and apparatus based on session initiation protocol. The session method is establishing a SIP message channel between two session terminals and using the SIP message to load and transmit media message. According to the invention, a SIP message and a RTP / RTCP message traversing a NAT can be implemented and then a session between a user agent and other user agent of private network can be implemented without function of a NAT gateway supporting a ALG and without setting additional STUN server.

Description

technical field [0001] The present invention relates to the technical field of Session Initiation Protocol (SIP, Session Initiation Protocol), in particular to a session method and device based on the Session Initiation Protocol. Background technique [0002] Voice over Internet Protocol (VoIP, Voice over Internet Protocol) is based on an IP packet switching network. Through a series of processing such as digitizing, compressing, packaging, and encapsulating traditional analog voice signals, voice services can be carried over the IP network. For example, IP telephony is a typical application of VoIP. [0003] SIP is currently the most widely used VoIP technology, and it is also an important communication protocol for the third-generation mobile communication. SIP messages include SIP request messages and SIP response messages. Typical networking applications of SIP are as follows: figure 1 shown. figure 1 Among them, the registration and proxy server (Registrar Server&Pr...

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Application Information

Patent Timeline

07 Oct 2009

Publication

CN101552848A

IPC: H04M7/00; H04L29/12; H04L29/06

Inventors: 张岩