Railway MCVideo Group Call Video Transmission Control

The patent applies local quality by defining category-specific permission control rules for different user terminals in railway communication. Instead of using a uniform permission control mechanism from 3GPP standards, the system implements localized permission configurations tailored to railway-specific roles and scenarios, ensuring that each user category receives appropriate access rights suited to their functional requirements.

The patent implements partial action by enabling video transmission only for specific user categories that require it, rather than allowing all terminals to transmit video. The permission control mechanism selectively activates video transmission capabilities based on user category definitions, ensuring that network resources are allocated only to terminals that have legitimate operational requirements, thus avoiding unnecessary resource consumption.

The patent applies segmentation by dividing user terminals into distinct categories based on their functional requirements in railway communication. This categorical segmentation simplifies permission management by grouping terminals with similar needs together, allowing the system to apply uniform permission rules within each category while maintaining precise control. The segmentation approach reduces complexity compared to managing individual permissions for each terminal.

The patent introduces an intermediary layer in the form of a category management module that sits between the terminal devices and the core MCVideo functionality. This intermediary handles category-based permission control and translation, allowing the system to implement railway-specific permission management while maintaining compatibility with existing 3GPP MCVideo standards. The intermediary acts as a bridge that adapts standard protocols to meet specialized railway communication requirements.