UE CSI Report Configuration for Capability-Based Memory Reduction

The patent introduces dynamic capability reporting where the UE indicates whether it supports cri-RI-CQI reports with or without non-PMI-PortIndication through separate capability indicators. This allows the UE to dynamically select which reporting type to use based on its actual capabilities and the network's requirements, rather than being forced to support both types simultaneously. The gNB configures CSI report settings based on the UE's reported capabilities, enabling flexible adaptation without requiring the UE to maintain memory for both report formats.

The patent segments the precoding control into two distinct restriction types: first restriction on PMI codebook rank and second restriction on PMI codebook values. By separating these control mechanisms, the patent allows the gNB to apply restrictions independently at different levels (rank level and value level), avoiding conflicts that would arise from combining multiple restrictions on the same parameter. This segmentation enables precise precoding control while maintaining configuration simplicity.

The patent leverages the periodic nature of DRX active time periods to optimize CSI resource storage. Instead of continuously storing all CSI resources, the UE stores CSI resources received during each DRX active time period and performs measurements based on these stored resources. This periodic approach allows the UE to maintain measurement accuracy by using the most recent CSI resources from the active period while minimizing memory overhead by discarding older resources when the DRX cycle repeats.