FD MIMO CSI Feedback Configuration for Flexible Mode Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing FD MIMO system's CSI feedback approach is inflexible and cannot support the feedback of various CSI-related information after measurement, particularly in scenarios requiring beamformed or non-precoded CSI measurement pilots.
Innovation Solution
A method and device for feeding back channel state information in an FD MIMO system, where a terminal receives CSI feedback configurations and configuration information from a base station, allowing for flexible CSI feedback modes, including beam-formed and non-precoded transmission modes, and specific indications for PUCCH and PUSCH channels, enabling the terminal to measure and report CSI accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing CSI feedback approach is used in FD MIMO system, then the system structure is simple, but the system cannot support flexible feedback of various CSI-related information
Solution Approach 1:
The patent introduces dynamic configuration parameters including CSI feedback mode indication information, codebook indication information, and codebook subset restriction indicator that allow the system to adaptively switch between different CSI feedback modes (beamformed and non-precoded) based on channel conditions and requirements, transforming the static feedback mechanism into a dynamic one
Solution Approach 2:
The patent changes key parameters of the CSI feedback system by introducing new configuration parameters (CSI feedback mode, codebook selection, subset restriction) that modify the behavior of the feedback mechanism, enabling transitions between different operational modes without changing the underlying system architecture
2Measurement precision
If beamformed CSI measurement pilot is used, then the measurement precision is improved, but the system requires specific configuration information that increases complexity
Solution Approach 1:
The patent applies preliminary action by having the base station pre-configure CSI feedback mode indication information, codebook indication information, and codebook subset restriction indicators before CSI measurement and feedback occurs, allowing the terminal to perform precise measurements with the appropriate configuration already in place
Solution Approach 2:
The patent introduces configuration information as an intermediary between the base station and terminal, where this intermediary layer ( consisting of CSI feedback mode indication, codebook indication, and subset restriction) enables precise beamformed measurements by providing the necessary guidance without requiring direct complex interaction between the entities
Data Source
AI summary
The present invention discloses a channel state information (CSI) feedback method and related device for an FD MIMO system, and is configured to support the scenario in which various CSI related information needs to be fed back after a CSI measurement in an FD MIMO system. The method comprises: a terminal receives a CSI feedback configuration group indicated by a base station and configuration information for performing a CSI feedback based on the CSI feedback configuration group; and the terminal performs a CSI measurement and feedback according to the CSI feedback configuration group and the configuration information, wherein the CSI feedback configuration group comprises at least one CSI feedback configuration, and the CSI feedback configuration is a downlink signal configuration for a downlink CSI measurement and feedback.