FD-MIMO CSI Feedback Mode Segmentation for Resource Overhead Reduction

The patent segments the channel status information reporting into multiple feedback modes (first feedback mode and second feedback mode). The first feedback mode reports channel status information for all antenna ports, while the second feedback mode reports channel status information for a subset of antenna ports. This segmentation allows the system to reduce resource consumption by selectively reporting only necessary channel status information while maintaining system capacity benefits from multiple antennas.

The patent implements partial action by allowing the UE to report channel status information for only a portion of the antenna ports in certain feedback modes. Instead of requiring full reporting for all antenna ports in all scenarios, the system accepts partial channel status information when appropriate, thereby reducing the quantity of feedback resources consumed while still enabling effective MIMO operation.

The patent introduces dynamic feedback mode indication where the UE can switch between first feedback mode (reporting all antenna ports) and second feedback mode (reporting subset of antenna ports) based on channel conditions and system requirements. This dynamic adaptation allows the system to maintain high measurement precision when needed while reducing feedback overhead in other scenarios, making the channel status reporting flexible and efficient.

The patent changes the parameter of feedback mode to control the amount of channel status information reported. By introducing a feedback mode indicator that switches between different reporting configurations, the system can adjust the measurement precision and feedback overhead parameters dynamically. The first feedback mode uses full reporting for high precision, while the second feedback mode uses reduced reporting for lower overhead, and the system can change between these parameter states as needed.