NTN Propagation Delay Timing During GNSS Outages

The patent introduces an intermediary mechanism where the base station assists the UE in estimating propagation delay by providing reference signals and timing information. The base station acts as a mediator that enables accurate timing even when GNSS is unavailable, resolving the contradiction between GNSS-based precision and reliability during GNSS outages.

The patent implements feedback mechanisms where the base station provides timing advance indications and propagation delay information back to the UE. This feedback loop enables the UE to continuously adjust its timing estimates based on actual network conditions, maintaining both accuracy and reliability regardless of GNSS availability.

The patent enables the UE to perform self-service timing adjustment by automatically estimating propagation delay using received reference signals and applying timing advance without requiring complex manual configuration. The UE independently calculates and applies timing corrections, maintaining signal reception quality while avoiding excessive device complexity.

The patent dynamically changes timing parameters based on propagation delay estimates. The UE adjusts transmission timing parameters in real-time based on the estimated delay, allowing the system to adapt to varying conditions without requiring complex fixed architectures, thus balancing simplicity with precision.