Tracking Reference Signal Configuration for High-Speed Train Doppler Compensation

The patent segments the Doppler shift compensation task by configuring separate tracking reference signal (TRS) resources for each transmission and reception point (TRP). Each TRS resource is associated with a specific TCI state that corresponds to a particular TRP, allowing the UE to independently estimate and compensate for Doppler shifts from each TRP rather than using a single aggregated estimation.

The patent changes the parameter configuration by introducing multiple TCI states with different Doppler shift values. The network configures the UE with multiple TRS resources, each linked to a specific TCI state containing Doppler shift information for its corresponding TRP. This allows dynamic adaptation to varying Doppler conditions from different TRPs based on the UE's relative motion.

The patent applies preliminary action by pre-configuring multiple TRS resources and their associated TCI states before actual data transmission. The network provides the UE with a pool of TRS resources and corresponding TCI states in advance, so that when multi-TRP transmission occurs, the UE can immediately use the pre-prepared resources without real-time configuration delays, simplifying the transmission process.

The patent makes the TCI state structure universal by designing it to handle both single-TRP and multi-TRP scenarios. The same TCI state mechanism and TRS resource configuration framework are used regardless of whether one or multiple TRPs are transmitting, allowing the system to adapt to different transmission modes without requiring separate complexity-heavy mechanisms for each case.