Uplink TAG Assignment for Multi-TRP Time Advance Alignment

The patent divides uplink channels and signals into multiple Timing Advance Groups (TAGs), where each TAG is associated with a specific TRP and uses a dedicated time advance value. This segmentation allows different time advances to be applied to different groups of transmissions, resolving the timing accuracy issue while maintaining manageable complexity through organized grouping.

The patent applies different time advance values to different TAGs based on their specific propagation characteristics to each TRP. Each TAG receives a locally optimized time advance value tailored to its specific propagation delay, ensuring accurate timing alignment for transmissions to different TRPs without requiring a single global time advance.

The patent creates a unified TAG management framework where a single TAG structure can accommodate multiple uplink channels and signals (PUCCH, PUSCH, SRS) that share the same timing characteristics. This multi-functional TAG approach reduces complexity by grouping related channels together rather than managing each channel's timing independently.

The patent introduces a new organizational dimension by associating TAGs with spatial relationships to different TRPs. Instead of managing time advances for each individual channel, the system adds a spatial grouping dimension where channels are organized by their target TRP, simplifying the management complexity through this additional organizational layer.