Wireless CSI Bitmap Reporting for Multi-TRP Coherent Joint Transmission

The patent segments the CSI report into multiple parts (first part CSI and second part CSI) with different bitmap structures. The first bitmap reports selected CSI-RS resources, while the second bitmap reports non-zero coefficient positions. This segmentation allows efficient reporting of multi-TRP CSI information without requiring a completely new complex reporting framework.

The patent introduces bitmap-based reporting in the CSI report structure, adding a new dimensional approach to CSI feedback. Instead of traditional quantitative CSI parameters alone, the system now includes bitmap indicators that efficiently represent selected TRPs and non-zero coefficient positions, enabling more compact and efficient multi-TRP CSI reporting.

The patent extracts only the essential information needed for multi-TRP CSI reporting by using bitmaps to indicate selected CSI-RS resources and non-zero coefficient positions. Instead of reporting complete CSI data for all configured TRPs, the system extracts and reports only the relevant subset, reducing reporting overhead while maintaining measurement precision for the selected TRPs.

The patent changes the reporting parameter structure by introducing bitmap-based indicators instead of traditional detailed CSI parameters for all TRPs. The first bitmap parameter indicates which CSI-RS resources are selected, and the second bitmap parameter indicates non-zero coefficient positions, fundamentally changing how multi-TRP information is represented and reducing overall reporting overhead.