UE RX Beam Switching with CSI Report Delay

The UE performs beam training and selects the new RX beam in advance, but delays the actual beam switching until after the TRP has updated its precoder based on the CSI report. This preliminary selection followed by timed execution resolves the contradiction by preparing the optimal beam beforehand while coordinating the switch timing to maintain transmission quality.

The UE transmits a CSI report to the TRP containing channel state information measured with the new RX beam. The TRP uses this feedback to update its precoder configuration. This feedback mechanism ensures that the TRP's transmit beamforming is synchronized with the UE's receive beam switching, preventing quality deterioration.

The UE completes beam training and selects the optimal new RX beam before transmitting the CSI report, performing the measurement and selection work in advance. This preliminary action reduces the actual switching delay after the report is transmitted, as the beam selection decision is already made and ready for execution.

The system dynamically coordinates the beam switching timing based on the CSI report transmission schedule. The UE switches beams at the optimal moment determined by the network's processing requirements and the scheduled CSI report transmission, making the switching delay adaptive rather than fixed, thus minimizing unnecessary delays while maintaining quality.