Aperiodic Hybrid CSI Reporting for eMIMO Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively reporting aperiodic hybrid channel status information (CSI) in multi-antenna communication systems, which affects the accuracy and efficiency of data transmission.
Innovation Solution
A method and apparatus that enable a terminal to receive a CSI report triggering message from a base station, update aperiodic CSI based on reference signals corresponding to different eMIMO types, and report the updated CSI, including beamforming for the second eMIMO type based on CSI from the first eMIMO type, to improve feedback efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a terminal reports aperiodic hybrid CSI for multiple eMIMO types separately, then the channel status information accuracy is improved, but the feedback overhead and reporting complexity increase
Solution Approach 1:
The patent combines multiple eMIMO type CSI reports (first and second eMIMO types) into a single hybrid CSI report. The terminal determines a first CSI for the first eMIMO type and a second CSI for the second eMIMO type, then reports them together as hybrid CSI when triggered by an aperiodic CSI report request, reducing feedback overhead while maintaining accuracy
Solution Approach 2:
The patent creates a universal hybrid CSI reporting mechanism that can handle multiple eMIMO types through a single reporting framework. The base station can trigger hybrid CSI reporting for different eMIMO type combinations using a unified DCI format, making the system adaptable to various transmission scenarios without requiring separate reporting procedures
2Manufacturing precision
If the terminal updates aperiodic CSI based on reference signals for multiple eMIMO types, then the data transmission accuracy is improved, but the processing time and complexity increase
Solution Approach 1:
The patent segments the CSI processing into distinct eMIMO type components (first eMIMO type CSI and second eMIMO type CSI), allowing the terminal to independently determine each component based on corresponding reference signals, then combine them into hybrid CSI. This modular approach simplifies the processing complexity while maintaining accuracy
3Loss of information
If the base station triggers aperiodic CSI reporting for multiple CSI processes, then the channel status information completeness is improved, but the uplink resource consumption increases
Solution Approach 1:
The patent merges multiple CSI process reports into a single hybrid CSI report transmitted on uplink resources. When the base station triggers aperiodic CSI reporting, the terminal combines CSI from multiple CSI processes (including first and second eMIMO types) into one hybrid report, reducing uplink resource consumption while maintaining information completeness
Data Source
AI summary
Disclosed is a method for a terminal reporting aperiodic channel status information (CSI) to a base station in a wireless communication system. The method comprises the steps of: receiving, from a base station via downlink control information (DCI), a CSI report triggering message of at least one CSI process, among multiple CSI processes, that is connected with one enhanced multiple input multiple output (eMIMO) type among a first eMIMO type and a second eMIMO type; and updating an aperiodic CSI associated with the at least one CSI process and reporting same to the base station based on a reference signal corresponding to the one eMIMO type.