Uplink Power Allocation in Multi-TA Group Wireless Systems

The patent segments the serving cells into multiple Timing Advance (TA) groups, where each group is assigned a distinct time alignment value. This segmentation allows cells with different propagation characteristics to be managed independently, resolving the contradiction by maintaining reliability through group-specific timing alignment while avoiding the complexity of individually managing each cell's timing.

The patent applies local quality by assigning different time alignment values to different TA groups based on their specific propagation characteristics. Instead of using a uniform time alignment value across all cells, each TA group receives localized timing adjustment tailored to its propagation environment, thereby improving uplink transmission reliability without excessive complexity.

The patent implements preliminary action by determining the time alignment values for different TA groups before scheduling uplink transmissions. The device checks whether SRS and uplink channel transmissions overlap in time, and if they do, it adjusts the transmit power or schedules transmissions in different time slots to prevent power exceedance. This preliminary timing and power management prevents interference while maintaining efficient resource utilization.

The patent applies dynamics by making the transmit power adjustable based on the timing overlap between SRS and uplink channel transmissions. When transmissions overlap, the device dynamically reduces power for one or both signals to stay within maximum power limits. This dynamic power control prevents harmful interference while allowing flexible resource utilization across different scenarios.