Uplink Timing Adjustment for Multi-SCS Mobile Systems

The patent applies parameter changes by introducing multiple subcarrier spacing configurations (e.g., 15kHz, 30kHz, 60kHz) to support different QoS requirements. Each subcarrier spacing has associated timing parameters (NTA, K values, Ts) that are adjusted based on the selected configuration, allowing the system to adapt timing characteristics to match service requirements while maintaining manageable complexity through standardized parameter sets.

The patent segments the timing adjustment mechanism into distinct components: TA command reception, NTA calculation with cell-specific K values, offset application (NTA,offset), and final timing determination. This segmentation allows each component to be independently configured and managed, reducing overall system complexity while supporting multiple subcarrier spacings.

The patent uses parameter changes by defining specific relationships between subcarrier spacing and timing parameters. For example, the time unit Ts is defined as 1/(Δf·N) where Δf is subcarrier spacing and N is FFT size, and NTA is calculated as TA×K where K is cell-specific. These parameter relationships enable accurate timing alignment while automating calculations to reduce processing burden.

The patent implements self-service through automated timing calculation mechanisms. The UE automatically determines NTA based on received TA commands and cell-specific parameters, applies appropriate offsets based on frame structure and SCS configuration, and calculates final timing without manual intervention. This self-service approach maintains high accuracy while reducing operational complexity.