MCU Token Control for Auxiliary Stream in Multi-Point Conferences
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Solution Overview
Problem
In multi-point double-stream video-conferencing systems, the MCU lacks full control over the auxiliary stream token, leading to delays in token release and potential conference disruptions when a terminal holds the token for an extended period, especially during urgent presentations.
Innovation Solution
Implementing a method where the MCU receives and judges token depriving requests, executing token deprivation by sending specific messages to the token-holding terminal, either by setting a symmetryBreaking field to 0 or sending a token depriving request message, allowing for forced token release and prioritization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the token mechanism is used to control auxiliary stream transmission, then the conference terminal can send auxiliary stream, but the token may be held for extended period causing delays in urgent presentations
Solution Approach 1:
The patent introduces dynamic token management by enabling the MCU to actively adjust token allocation based on real-time conference needs. The symmetry breaking field allows the system to transition from static token holding to dynamic token redistribution, where the token can be forcibly reallocated from one terminal to another based on urgent presentation requirements, thus resolving the contradiction between reliable transmission control and timely token release
Solution Approach 2:
The patent changes the parameter of token allocation by introducing the symmetry breaking field as a control mechanism. This parameter change enables the MCU to modify token distribution based on conference priorities, allowing forced token release when urgent presentations are detected, thereby balancing the reliability of transmission control with the timing requirements of urgent content delivery
2Extent of automation
If the MCU controls token delivery according to H.239 protocol, then the auxiliary stream token can be managed, but the MCU cannot fully control the token release when terminal holds it for extended period
Solution Approach 1:
The patent enhances MCU authority by introducing dynamic token control mechanisms. The symmetry breaking field enables the MCU to actively manage token allocation rather than passively following protocol rules, allowing forced token release when necessary. This dynamic control resolves the contradiction by giving the MCU both automated protocol compliance and flexible adaptive control over token release timing
Solution Approach 2:
The patent introduces the symmetry breaking field as an intermediary control mechanism between the MCU and conference terminals. This intermediary allows the MCU to exert influence over token allocation without directly violating the H.239 protocol, enabling flexible token release control while maintaining protocol compliance. The intermediary mechanism resolves the contradiction by providing a controlled interface for adaptive token management
Data Source
AI summary
The present invention relates to a method, a system, and a device for controlling a token for an auxiliary stream in a multi-point double-stream conference. In the multi-point double-stream conference, when the token is held by the first conference terminal, the auxiliary stream is sent, and the second conference terminal requests for depriving the token, an MCU receives the token depriving request message. Then, the MCU judges whether to execute the token depriving according to the identifier carried in the token depriving request message. When the MCU decides to execute the token depriving, the token of the first conference terminal is deprived. By means of judging whether the token depriving can be executed according to the ID carried in the token depriving request message after the MCU receives the token depriving request message, and executing the specific token depriving by the MCU when the MCU determines to execute the token depriving, the preceding solution effectively solves the problem that the auxiliary stream token is held by a certain conference terminal for a long time and the sending of an emergent and important auxiliary stream is disturbed, realizes the absolute control of the auxiliary stream token in a multi-point double-stream conference, and meets the need of user.