SIP (Session Initiation Protocol) protocol-based multimedia network communication method

A SIP protocol and network communication technology, applied in wireless communication, wireless network protocol, transmission system, etc., can solve the problems of mismatched multimedia codec capability sets of terminals, incompatibility with heterogeneous network terminals, inconsistent network bandwidth capabilities, etc. Optimized media negotiation strategy, good compatibility and reasonable design effect

Inactive Publication Date: 2011-04-20
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a multimedia network communication method based on the SIP protocol, realize the communication of incompatible heterogeneous network terminals, and solve the problem of inconsistency in network bandwidth capabilities and mismatch of terminal multimedia codec capability sets in a heterogeneous network environment Interoperability problems caused by large differences in screen resolution

Method used

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  • SIP (Session Initiation Protocol) protocol-based multimedia network communication method
  • SIP (Session Initiation Protocol) protocol-based multimedia network communication method
  • SIP (Session Initiation Protocol) protocol-based multimedia network communication method

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Embodiment 1

[0058] This embodiment 1 is combined with the attached Figure 6 The following describes the specific implementation of the present invention under the condition that there is a user media capability database.

[0059] The user media capability database is established and managed by the server, and the corresponding content is created and updated through the user multimedia coding capability set carried in the SDP when the SIP user sends the REGISTER message.

[0060] According to the SIP protocol, when users send REGISTER messages, it is not mandatory to include SDP and corresponding multimedia coding capability sets, etc., but this kind of extension can be carried out on the basis of SIP without affecting the functions required to be realized by the REGISTER message itself, and this This newly defined REGISTER message is just the innovation of the present invention and the realization basis of this embodiment.

[0061] The specific process is as follows:

[0062] Client1 i...

Embodiment 2

[0078] This embodiment 2 is combined with the attached Figure 7 The following describes the specific implementation of the present invention when there is no user media capability database.

[0079] The specific process is as follows:

[0080] Client1 is the initiator of a session. When Client1 needs to initiate a session, it first sends an INVITE signaling. The SDP in this signaling includes the multimedia coding capability set of Client1, and it can be known from Table 1 that its elements are a, b, and c. After the signaling is established, Client1 sends it to Client2.

[0081] The INVITE signaling arrives at the server first, and the server first records the multimedia coding capability set of Client1, and then directly forwards the INVITE signaling to test the matching of the media capabilities of both communication parties.

[0082] At the same time, the server sends a 100Trying message to Client1 to indicate that it is processing its request.

[0083] Client2 receiv...

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Abstract

The invention relates to an SIP (Session Initiation Protocol) protocol-based multimedia network communication method. The method is characterized by comprising the following steps of: after an SIP server receives a failure message of a Client2, sending a help request to a media adapter gateway; and if a multimedia coding capability set supported by the media adaptor gateway and multimedia coding capability sets of two communication parties have an intersection, successfully establishing a session through the media adapter gateway with a method of carrying out media transcoding based on the coding type in the intersection. The invention has the characteristics of expanding the multimedia coding capability sets of heterogeneous terminals and optimizing a media negotiation strategy through realizing the normal communication of incompatible heterogeneous network terminals, solves the problem on intercommunication due to inconsistent network bandwidth capabilities in a heterogeneous network environment, unmatched terminal multimedia coding-decoding capability sets and large screen resolution difference, intelligently adapts the capabilities of the two multimedia network communication parties and ensures that the compatibility of multimedia network communication is better, and the application range is wider.

Description

technical field [0001] The invention relates to multimedia network communication, in particular to a communication terminal media negotiation and capability set extension method based on SIP protocol. Background technique [0002] With the development and popularization of multimedia network communication, various corresponding audio and video coding and communication protocols continue to emerge, which improves the quality of multimedia network communication, expands the scope of multimedia network communication, and makes people's multimedia network communication life more convenient and colorful. . [0003] However, due to various reasons, the media codec methods used by various communication terminals are not the same, such as AMR, G.729, G.723, and iLBC in audio coding, and H.263, H.264, and MPEG in video -4 etc. Even with the same codec, there are differences in resolution, rate, and format encapsulation. Therefore, when different communication terminals perform mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04W80/10
Inventor 莫益军蔡译锋黄本雄戴彬
Owner HUAZHONG UNIV OF SCI & TECH
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