Multimedia Ring Tone Playback During Active Call
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Solution Overview
Problem
Existing multimedia ring tone services cannot continuously play multimedia content during a call, as they stop once the call is answered, failing to provide continuous audio or video experiences for users.
Innovation Solution
A method and system that utilize a Multimedia Resource Function (MRF) for audio mixing, where a Customized Ringing Signal-Application Server (CRS-AS) sends re-INVITE and UPDATE messages with Session Description Protocol (SDP) offers to terminals, ensuring continuous playback of multimedia ring tones by instructing the MRF to execute audio mixing processing during a call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the prior art method is used where the CRS server stops playing the CRS after the called party answers the call, then the call enters a normal call stage, but the multimedia ring tone cannot be played continuously during the call
Solution Approach 1:
The patent implements continuous playback of the multimedia ring tone (CRS/CAT) during the entire call duration by maintaining the audio mixing state. The MRF continues to mix the ring tone with the call audio stream even after the called party answers, ensuring the useful action of ring tone playback persists throughout the call rather than stopping at call answer.
Solution Approach 2:
The patent introduces the MRF (Media Resource Function) as an intermediary component that mediates between the CRS-AS (Customized Ringing Signal Application Server) and the terminals. The MRF performs audio mixing to combine the ring tone with the call audio stream, enabling continuous playback during the call without interfering with the normal call stage transition.
2Reliability
If the CRS server stops playing the CRS when the called party answers, then the system enters normal call stage, but the user experience of continuous multimedia content playback is lost
Solution Approach 1:
The MRF is designed to perform multiple functions: it handles both the ring tone playback during the ringing stage and the continuous audio mixing during the call stage. This multi-functionality allows the system to maintain reliable call stage transitions while avoiding the need for separate systems for ring tone management and call management.
Solution Approach 2:
The MRF acts as an intermediary that simplifies the system architecture by centralizing audio processing functions. Instead of requiring complex coordination between multiple servers to maintain continuous playback, the MRF mediates the audio streams, making the system easier to manufacture and deploy while ensuring reliable call stage transitions.
3Duration of action of moving object
If audio mixing processing is executed continuously during the call, then multimedia ring tone can be played continuously, but additional server resources and session update messages are required
Solution Approach 1:
The patent maintains continuous audio mixing processing during the entire call duration to ensure uninterrupted ring tone playback. The MRF continuously mixes the ring tone with the call audio stream, and the CRS-AS continuously manages the session state, ensuring the useful action of multimedia playback persists without interruption.
Solution Approach 2:
The system implements feedback mechanisms where the CRS-AS monitors the call state and sends re-INVITE or UPDATE messages to maintain the audio mixing session. This feedback loop ensures that the session management adapts to call stage changes while maintaining continuous playback, managing the complexity through automated state monitoring and response.
Data Source
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AI summary
A method, a server and a terminal device for playing a multimedia ring tone during a call are provided according to the embodiments of the present invention, where the method includes: receiving a request flag sent by a calling terminal or a called terminal; and triggering continuous play of a multimedia ring tone during a call according to the request flag. Through the method, server and terminal device for continuously playing a multimedia ring tone during a call, a problem in the prior art that a multimedia ring tone cannot be continuously played for a user during a call is solved.