NTN RACH Configuration for Timing Advance-Based Random Access

The patent segments the random access procedure by introducing multiple RACH configurations corresponding to different reference points. Each reference point has dedicated RACH occasions and timing advance values, allowing UEs to select the most appropriate configuration based on their location and propagation delay, thereby improving access efficiency and reducing time loss in NTN environments

The patent changes key parameters of the random access procedure by introducing multiple RACH configurations with different timing advance values and RACH occasion settings. This allows the system to adapt parameters dynamically based on the UE's distance from the satellite and propagation conditions, optimizing the random access procedure for different scenarios in NTN

The patent manages complexity by segmenting the RACH configuration into multiple independent sets, each associated with a specific reference point. The UE selects one configuration set based on its conditions, which simplifies the actual access process while allowing the system to support multiple reference points. This segmented approach improves efficiency without proportionally increasing UE complexity

The patent applies preliminary action by pre-configuring multiple RACH configuration sets with different timing advance values before the random access procedure begins. The UE receives and stores these configurations in advance, then selects the appropriate one based on its propagation delay conditions. This preliminary preparation allows efficient random access without requiring complex real-time calculations during the actual access procedure