Multi-TRP Power Headroom Reporting for Accurate Uplink Power Control

The patent segments the power headroom reporting process by introducing a reporting target TRP concept. Instead of treating multiple TRPs uniformly, the UE selects specific target TRPs for reporting based on criteria such as pathloss. This segmentation allows accurate power control for each target TRP while managing UE complexity through selective reporting rather than comprehensive reporting to all TRPs.

The patent applies local quality by allowing different power control parameters to be configured for different target TRPs. The network can configure pathlossReferenceRS for each target TRP, enabling localized power control optimization. This approach improves power headroom reporting accuracy for specific TRPs without requiring uniform complex processing across all TRPs, thus balancing accuracy with UE complexity.

The patent extracts only the necessary power headroom information by selecting specific target TRPs for reporting. Instead of reporting PHR for all configured TRPs, the UE identifies and reports only for target TRPs that meet specific criteria (e.g., lowest pathloss). This extraction approach maintains power control reliability for critical TRPs while reducing signaling overhead by eliminating redundant reports for non-target TRPs.

The patent implements partial action by reporting power headroom for a subset of TRPs rather than all TRPs. The network configures a set of target TRPs, and the UE reports PHR for these selected targets. This partial reporting approach provides sufficient power control reliability for the most important TRPs while keeping signaling overhead manageable, avoiding the excessive overhead of reporting to every possible TRP.