Truncated Beam Failure Recovery MAC CE for Multi-TRP NR Systems

The patent segments the beam failure recovery information transmission by introducing a first indicator field that specifies whether the BFR MAC CE contains recovery information for one TRP or multiple TRPs. This segmentation allows the system to adaptively structure the MAC CE content based on the number of TRPs experiencing beam failure, thereby completing the information transmission for multiple TRPs when necessary while avoiding unnecessary data transmission when only one TRP is affected, thus resolving the contradiction between information completeness and payload resource consumption.

The patent implements a dynamic BFR MAC CE structure where the first indicator field enables the MAC CE to adapt its effective size and content based on the actual beam failure scenario. When only one TRP experiences beam failure, the MAC CE contains minimal information for that single TRP; when multiple TRPs experience beam failure, the MAC CE expands to include recovery information for all affected TRPs. This dynamic adaptation resolves the contradiction by allowing the MAC CE to be compact when possible (improving transmission efficiency) while expanding when necessary (preserving information capacity).