Multicast Broadcast Service Reception on Non-Serving Cells
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Solution Overview
Problem
Current multicast broadcast service designs restrict users from receiving services from non-serving cells, limiting the maximum number of users, especially in emergency and public safety scenarios where simultaneous unicast and multicast services are required from different or same operators.
Innovation Solution
User equipment (UE) reports assistance information to the serving primary cell for receiving multicast broadcast services from secondary or non-serving cells, allowing simultaneous unicast and multicast service reception by reconfiguring unicast service components and using specific control channels for efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE only receives MBS from serving cell, then service reception is simple and reliable, but service accessibility is limited and maximum number of users is restricted
Solution Approach 1:
The patent segments the service reception process into distinct components: assistance information reporting for capability indication, control channel reception (BCCH/MCCH) for service configuration, and traffic channel reception (MTCH) for actual data. This segmentation allows UE to receive MBS from non-serving cells while maintaining manageable complexity through structured information flow and separate functional blocks.
Solution Approach 2:
The patent introduces assistance information as an intermediary mechanism between UE and network. This intermediary enables the network to understand UE capabilities for receiving MBS from non-serving cells, facilitating coordinated resource allocation and service configuration without requiring fundamental changes to the core MBS architecture.
2Adaptability or versatility
If UE receives MBS from non-serving cell simultaneously with unicast service, then service coverage is expanded, but resource allocation becomes more complex
Solution Approach 1:
The patent implements dynamic resource allocation where the network can flexibly assign resources for MBS reception from non-serving cells based on UE capabilities and current service conditions. The assistance information mechanism allows dynamic adjustment of unicast and multicast resource allocation, enabling the system to adapt to varying service demands and optimize resource utilization.
Solution Approach 2:
The patent utilizes parameter changes in the assistance information (such as supported band combination, CFR configuration, number of component carriers, MIMO layers, modulation order, and subcarrier spacing) to optimize resource allocation. By adjusting these parameters based on UE capabilities and network conditions, the system can efficiently allocate resources for simultaneous unicast and MBS reception.
3Productivity
If UE reports assistance information for MBS reception, then resource allocation is optimized, but signaling overhead increases
Solution Approach 1:
The patent implements preliminary action by having the UE report assistance information before actual MBS reception begins. This preliminary capability indication allows the network to pre-configure resources and optimize allocation parameters in advance, improving resource allocation efficiency while containing signaling overhead within acceptable boundaries through structured and timely information exchange.
Data Source
AI summary
Apparatus and methods are provided for multicast broadcast service (MBS) transmission and reception on secondary cell (SCell) or non-serving cell. In one novel aspect, the UE receiving unicast from a serving PCell, reports assistance information for receiving MBS to the PCell and receives MBS from the non-serving cell or the SCell simultaneously with the reception of the unicast. In one embodiment, the assistance information includes one or more elements comprising supported band combination, common frequency resource (CFR) configuration, the number of component carrier, MIMO layer, modulation order and subcarrier spacing. In one embodiment, the UE receives adjustment configuration for the unicast in preparation for the MBS reception. In one embodiment, one or more CCs for the unicast is deactivated/released for the MBS reception. In one embodiment, the two-step procedure, which is the broadcast control channel (BCCH) and MBS control channel (MCCH), is used for the MBS reception.