Media gateway, media gateway controller, multimedia telephone intercommunication method and system

A multimedia phone and media gateway technology, which is applied in the field of communication, can solve problems such as inability to adjust and adapt quality problems, quality information feedback of multimedia phone terminals, and not conducive to improving the quality of multimedia phone intercommunication communication, etc., to achieve the effect of improving communication quality

Active Publication Date: 2009-10-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The quality problems that occur or are detected by the IMS-side multimedia phone terminal can only be solved by the gateway system through packet loss, but the IMS-side multimedia phone terminal cannot feed back specific quality information to the gateway system,

Method used

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  • Media gateway, media gateway controller, multimedia telephone intercommunication method and system
  • Media gateway, media gateway controller, multimedia telephone intercommunication method and system
  • Media gateway, media gateway controller, multimedia telephone intercommunication method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050]For the established multimedia telephone intercommunication, when an MTSI (IMS multimedia telephone) terminal moves to a place where wireless users are densely populated, the bandwidth allocated to a single user will decrease due to relatively tight wireless resources. At this time, the IMS-side multimedia phone terminal detects that the network bandwidth drops, and the IMS-side multimedia phone terminal will feed back a maximum bandwidth request TMMBR request message to the MGW through RTCP, requesting the MGW to reduce the bandwidth. After receiving the maximum bandwidth request, the MGW first judges whether a video transcoder has been inserted into the session, and whether the video can be adjusted to the bandwidth requirement.

[0051] Case 1: If the session already includes a video transcoder and can adjust the video to the bandwidth requirement, then the MGW can process the video and adjust the video sending rate. like figure 2 As shown, the specific steps are: ...

Embodiment 2

[0066] Usually, in the case of a certain bandwidth, it is necessary to select a high frame rate and low picture quality to ensure the quality of multimedia intercommunication for images with intense video content movement; High picture quality to ensure the quality of multimedia intercommunication. When it is detected that the video quality is not good, the main reason is that the frame rate and picture quality are not coordinated. At this point, the MGW first judges whether a video transcoder has been included or inserted in the session with the multimedia phone terminal on the IMS side, and judges whether the video coding can be adjusted to the requested frame rate and resolution.

[0067] If a video transcoder has been inserted into the session, and the video encoding can be adjusted to the requested frame rate and resolution, then the MGW itself will handle the process to coordinate and balance the frame rate and image resolution. The specific steps are: first, the IMS si...

Embodiment 3

[0075] When the multimedia phone terminal on the IMS side detects that the packet loss rate exceeds the upper threshold, it will feed back the detected quality information to the MGW. Adjustment.

[0076] If the communication quality can be adjusted according to the packet loss rate, the MGW itself can process the video, convert the packet loss rate into bandwidth information, and modify the encoding and frame rate according to the bandwidth information.

[0077] If the communication quality cannot be adjusted according to the packet loss rate, the MGW will convert the packet loss rate into bandwidth information and report it to the MGCF through an H.248 message, and the MGCF will feed back the maximum bandwidth information through H.245 For the H.324 multimedia telephone terminal on the CS side, the H.324 multimedia telephone terminal on the CS side modifies the encoding and frame rate according to the bandwidth information. like Figure 5 As shown, the specific steps are: ...

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Abstract

The invention discloses a media gateway, a media gateway controller, a multimedia telephone intercommunication method and a system, which relate to the field of communication technology and are invented for solving the problem of not dynamically adjusting the communication quality during the intercommunication of an IMS multimedia telephone and a CS multimedia telephone in the prior art. The multimedia telephone intercommunication method provided by the embodiment of the invention comprises the following steps under the scene of the intercommunication of the IMS multimedia telephone and the CSmultimedia telephone: the media gateway receives quality messages fed back by an IMS side multimedia telephone terminal; and the media gateway dynamically adjusts the communication quality accordingto the quality messages. The invention is suitable to the intercommunication of the multimedia telephones, and improves the communication quality of the intercommunication of the multimedia telephones.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a media gateway, a media gateway controller, and a multimedia telephone interworking method and system. Background technique [0002] Currently, in the intercommunication between 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) multimedia telephone terminals and CS (Circuit Switch, circuit switching) side H.324 multimedia telephone terminals , usually through the gateway system for information exchange. [0003] In the process of intercommunication between the IMS-side multimedia telephone terminal and the CS-side H.324 multimedia telephone terminal, the IMS-side multimedia telephone terminal usually encounters quality problems such as buffer overflow that the data packets sent by the IMS-side multimedia telephone terminal are not stable enough. After the gateway system finds the...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04N7/14
Inventor 许志勇
Owner HUAWEI TECH CO LTD
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