CSI-RS Resource Selection for Wireless Signaling Overhead Reduction

The patent segments the CSI reporting process into two distinct parts: (1) reporting an indicator identifying the selected CSI-RS resource from multiple configured resources, and (2) reporting the actual CSI (CQI/PMI/RI) derived from the selected resource. This segmentation allows the system to support multiple transmission points through multiple CSI-RS resources while keeping the signaling overhead manageable by separating the resource selection information from the detailed channel state information.

The patent creates a universal CSI reporting mechanism that can handle both single and multiple CSI-RS resources within a unified framework. The UE receives configuration information for multiple CSI-RS resources, selects one resource based on channel conditions, and reports CSI accordingly. This multi-functional approach allows the system to adapt to different transmission scenarios (single or multiple transmission points) without requiring separate, dedicated configurations for each case, thereby reducing device complexity while maintaining versatility.

The patent implements preliminary action by having the network pre-configure multiple CSI-RS resources with beamforming parameters before actual data transmission. The UE receives and stores these configuration information in advance, including resource allocation, beamforming vectors, and associated parameters. When transmission is needed, the UE simply selects from the pre-configured resources based on current channel conditions, avoiding the need for complex real-time configuration negotiations and reducing overall system complexity while maximizing the number of transmission points.