Multi-TRP Reference Signal Alignment for High-Speed Mobility

The patent applies parameter changes by dynamically adjusting carrier frequencies at different TRPs based on measured frequency shifts. The base station modifies the frequency parameters of reference signals transmitted through multiple TRPs to compensate for Doppler effects, ensuring that UEs can reliably receive signals despite high mobility conditions while managing synchronization complexity through controlled parameter adaptation.

The patent implements feedback mechanisms where the base station measures frequency shifts of uplink reference signals from UEs, then uses this feedback information to adjust the carrier frequencies of downlink reference signals transmitted through multiple TRPs. This closed-loop feedback approach maintains transmission reliability by continuously adapting to changing channel conditions while keeping synchronization manageable through measured rather than arbitrary frequency adjustments.

The patent applies preliminary action by having the base station perform frequency shift measurements using uplink reference signals before transmitting downlink reference signals through multiple TRPs. This advance measurement allows the system to pre-compensate for Doppler frequency shifts, ensuring stable signal reception without requiring complex real-time frequency tracking during data transmission.

The patent uses reference signals as intermediaries to facilitate frequency shift measurements. These dedicated reference signals serve as mediators between the UE and base station, enabling accurate frequency offset detection without interfering with data transmission. The reference signals provide a clean measurement target that simplifies frequency shift detection while the compensation applied to these same signals ensures stable reception of subsequent data transmissions.