Timing Advance Determination via Round Trip Time in Wireless Systems

The patent segments the TA determination process into separate components: SSB reception timing, PRACH transmission timing, and RTT calculation. By dividing the measurement process into distinct segments with specific timing references, the system achieves both high communication capacity through efficient random access procedures and high positioning accuracy through precise timing measurements of individual segments.

The patent introduces RTT (round trip time) as an intermediary parameter that mediates between the SSB reception timing and PRACH transmission timing. This intermediary enables the system to derive accurate TA values that simultaneously support high communication capacity operations and precise positioning measurements, resolving the contradiction between productivity and measurement precision.

The patent implements a feedback mechanism where the base station receives the PRACH signal, calculates RTT based on the timing difference between SSB transmission and PRACH reception, and provides TA information back to the UE. This feedback loop ensures that the TA values used for signal transmission are accurate and reliable, simultaneously improving positioning accuracy and maintaining transmission reliability through continuous timing adjustment.

The patent performs preliminary timing measurements by having the UE record the SSB reception timing and the PRACH transmission timing before final TA determination. These preliminary actions provide the necessary timing data for accurate RTT calculation, which then enables both high positioning accuracy and reliable signal transmission through proper TA application in advance of actual communication.