Multi-TRP Uplink Timing Alignment with Separate TAG-Based Advance

The patent divides the timing advance management into separate groups (TAGs), where each TAG can be associated with different TRPs. This segmentation allows independent timing adjustment for each TRP group, resolving the contradiction by maintaining simple management within each group while achieving accurate timing across multiple TRPs through group-based segmentation.

The patent applies different timing advance values to different TRPs based on their specific distances from the terminal device. This local quality approach ensures that each TRP receives appropriately optimized timing parameters for its specific location, improving timing accuracy without requiring complex global coordination.

By organizing multiple timing advance values into distinct TAG groups, the patent reduces the complexity of managing multiple values. Each TAG can be independently configured and managed, making the overall system more tractable while still providing accurate timing for each TRP.

The TAG mechanism serves multiple functions: it groups TRPs, manages timing advance values, and enables independent adjustment for different TRP sets. This multi-functionality reduces the need for separate complex management mechanisms for each TRP, thereby reducing overall device complexity while maintaining accuracy.

The patent applies timing advance adjustments specifically tailored to each transmission type (PUSCH, PUCCH, SRS) based on their respective requirements and the associated TRP characteristics. This local optimization improves transmission efficiency for each channel type while maintaining manageable coordination through the TAG framework.

The patent enables dynamic timing adjustments for different transmission types within the TAG structure, allowing the system to adapt timing parameters based on specific transmission requirements and TRP conditions, thereby improving overall communication efficiency without rigid coordination constraints.