Interaction method, device and system for dual-tone multi-frequency in separation structure

Abstract

This invention relates to an interaction method, a device and a system under a separation structure, in which, the method includes: a media control device instructs a media process device to apply a mode of H,245UserInput Indication message to send a dual-sound multi-frequency signal to a receiving end after it tests receiving the signal, or it indicates the process device to be converted to a mode received by the receiving end to send the siganl to the receiving end after it tests the message of the H.245UserInput Indication.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a dual-tone multi-frequency interaction method, device and system under a separate architecture. Background technique [0002] A multimedia communication system refers to a network system that can provide multimedia sessions, such as audio and video communications. Currently there are many multimedia communication systems, including H.324 networks using H.324, H.245, H.223 and other protocols; H.323, H.225.0, H.245, RTP (Real-time Transport Protocol) / RTCP H.323 network with protocols such as (Real-time Transport Control Protocol); IMS (IP Multimedia Subsystem) network with protocols such as SIP (Session Initiation Protocol), SDP (Session Description Protocol), RTP / RTCP, etc. [0003] The intercommunication between different multimedia communication systems needs to realize the intercommunication of signaling and media, which is generally completed by the cooperati...

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Problems solved by technology

[0018] 1) The way to send DTMF to the CS side is to play DTMF. Since the CS side uses compressed audio codec, this method of directly transmitting DTMF through the audio stream is very unreliable, and there may be missed or wrong detections. Happening

[0019] 2) The MGC cannot instruct the MGW to directly convert the DTMF detected from the IMS side into an H.245UserInput Indication message and send it to the CS side; in this way, the MGW can only transmit the DTMF signal to the CS side through the audio stream, and there will be risks of missed detection and false detection

[0020] 3) The current protocol does not clearly describe how the MGW should handle the DTMF transmitted through the H.245 UserInputIndication message from the CS side

[0021] 4) If the MGW needs to report to the MGC after receiving the DTMF transmitted through the H.245 UserInput Indication message from the CS side, it can only report the entire H.245 UserInput Indication message, which is inconsistent with the MGW's idea of ​​terminating H.245. The MGC receives After such a report, H.245 protocol analysis needs to be performed. Such an H.245 UserInput Indication message needs to be processed on both the MGW and the MGC, which makes the processing quite complicated.

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