Dual MCCH Mapping for RRC Inactive 5G Multicast Reception

The patent segments the MCCH into two distinct types: first MCCH for broadcast MBS sessions and second MCCH for multicast MBS sessions. This segmentation allows the network to provide differentiated control mechanisms for different service types, enabling UEs in RRC inactive state to efficiently receive broadcast services while maintaining appropriate network control for multicast services requiring UE interaction.

The patent applies local quality by providing different MCCH types tailored to specific service requirements. The first MCCH is optimized for broadcast services where UEs in RRC inactive state can efficiently receive content without establishing full RRC connections, while the second MCCH maintains traditional multicast control for services requiring UE network interaction. This localized optimization resolves the contradiction by allowing service-specific adaptability without universally increasing network complexity.

The patent extracts the broadcast service control functionality from the traditional multicast MCCH, creating a separate first MCCH dedicated to broadcast MBS sessions. This extraction allows broadcast services to be delivered with optimized control mechanisms suitable for RRC inactive state UEs, while the second MCCH continues to handle multicast services. The separation improves service delivery efficiency by applying appropriate control strategies for each service type without forcing a one-size-fits-all approach.

The patent implements universality by designing the dual MCCH system to handle both broadcast and multicast services within a unified framework. The network can selectively activate and manage the first and second MCCH based on service requirements, making the system adaptable to different service types while maintaining a single standardized interface for UE interaction. This multi-functional design improves productivity by efficiently serving diverse services without proportionally increasing management complexity.

The patent applies preliminary action by providing mapping information in advance that indicates the correspondence between MBS session identifiers and MCCH types. This allows UEs to pre-configure their reception behavior and efficiently determine which MCCH to monitor for specific MBS sessions without requiring complex real-time decisions. The mapping information is provided through system information or RRC signaling, enabling UEs in RRC inactive state to efficiently receive broadcast services with minimal processing overhead.

The mapping information acts as an intermediary that bridges the MBS session identifier and the appropriate MCCH type. Instead of requiring UEs to directly interpret complex service configurations or monitor multiple MCCH types indiscriminately, the mapping information provides a simple lookup mechanism that efficiently directs UEs to the correct MCCH for each MBS session. This intermediary reduces UE processing complexity and improves efficiency while keeping signaling overhead manageable through compact representation.