Cloud Audio Conference Transfer Without Losing Host Privileges
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Solution Overview
Problem
Conventional telephony systems fail to transfer ongoing audio calls from audio-only devices like VOIP softphones to mobile devices without causing interruptions, and they do not support the transfer of call rosters and host capabilities based on user roles.
Innovation Solution
A cloud-based audio call transfer scheme using SIP signaling generates a conference ID with the same indicator as the current conference ID, allowing seamless transfer of audio calls and associated call rosters and host capabilities to mobile devices by adding the mobile device to the call and removing the VOIP softphone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional telephony systems transfer ongoing audio calls from VOIP softphones to mobile devices, then device mobility is improved, but call continuity is broken due to interruptions
Solution Approach 1:
The system performs preliminary actions by establishing a new audio call channel to the mobile device before terminating the softphone connection. The conference bridge pre-establishes the mobile device's participation in the conference before the actual transfer completes, ensuring continuous audio flow without interruption.
Solution Approach 2:
The conference bridge acts as an intermediary that mediates between the softphone and mobile device. It maintains the audio conference session alive by routing calls through itself, allowing seamless transition from softphone to mobile device without breaking the continuous audio stream.
2Adaptability or versatility
If conventional telephony systems transfer audio calls, then device mobility is improved, but call roster and host capabilities are lost
Solution Approach 1:
The system implements universality by transferring not just the audio call but also the complete conference state including call roster, host capabilities, and conference configuration to the mobile device. The mobile device becomes a universal participant inheriting all conference attributes, enabling it to function as a full-featured conference participant.
Solution Approach 2:
The system creates a copy of the complete conference state including call roster, host capabilities, and configuration parameters. This copy is then transferred to the mobile device, allowing the mobile device to assume the role of the original softphone participant with all associated metadata and control capabilities intact.
3Reliability
If VOIP softphones maintain ongoing audio calls, then communication reliability is improved, but inability to transfer to mobile devices reduces operational flexibility
Solution Approach 1:
The system introduces dynamics by enabling the audio call routing to change adaptively based on user needs. The conference bridge can dynamically switch the active participant from softphone to mobile device while maintaining continuous audio conference, allowing operational flexibility without compromising communication reliability.
Data Source
AI summary
A server of a system is configured to transmit a message from a first device that includes a conference identifier (ID) and a user ID to a second device to connect the second device to an ongoing audio conference bridge call without interrupting the audio conference bridge call. By providing the conference ID and the user ID, host privileges associated with the user associated with the user ID are transferred to the second device. By transferring the host privileges to the second device, the user can, via the second device, view the participant roster and add or remove participants from the audio conference bridge call.