A session method and device 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 problem that STUN technology is difficult to traverse NAT function, etc., and achieve the effect of simplifying networking

Active Publication Date: 2012-02-01
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0028] 2) Use STUN technology for NAT traversal: This method first needs to add an additional STUN server in the public network, and also requires the SIP terminal to support the STUN client function, and with the continuous enhancement of NAT security features, the existing STUN It is difficult for technology to complete the function of traversing NAT alone, and it must be combined with other technologies to realize NAT traversal

Method used

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  • A session method and device based on session initiation protocol
  • A session method and device based on session initiation protocol
  • A session method and device based on session initiation protocol

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Embodiment Construction

[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 invention provides a session method and device based on the session initiation protocol. The session method establishes a SIP message channel between two ends of the session, and utilizes the SIP message to carry and transmit media messages. According to the present invention, SIP messages and RTP / RTCP messages can traverse NAT without the need of NAT gateway to support ALG function, and without setting additional STUN server, so as to realize the conversation between the user agent in the private network and other user agents .

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M7/00H04L29/12H04L29/06
Inventor 张岩
Owner NEW H3C TECH CO LTD
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