CSI Reporting Timing Alignment for Duplex Mode Switching
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Solution Overview
Problem
The change in antenna configuration during mode switching between full-duplex and half-duplex modes in base stations leads to poor accuracy in channel state information (CSI) reporting due to mismatched spatial characteristics in channel measurements.
Innovation Solution
A CSI reporting method where a terminal sends a CSI report in a first time unit, with the second time unit determined based on a third time unit and a preset offset value, and the first time-frequency type being either indicated by the network-side device or inherent, improving the matching between measurement results and downlink reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station switches between full-duplex and half-duplex modes, then the adaptability of the communication system is improved, but the measurement precision of channel state information deteriorates due to spatial characteristic changes
Solution Approach 1:
The patent applies preliminary action by having the terminal determine the second time unit in advance based on the first time unit and preset offset value before actual CSI measurement. This ensures that the measurement is performed at the appropriate time when spatial characteristics match the downlink reference signal, thereby resolving the accuracy deterioration caused by mode switching while maintaining adaptability
Solution Approach 2:
The patent uses copying by having the terminal measure channel state based on downlink reference signals transmitted by the base station. The terminal creates a measurement result that copies the channel characteristics, and by timing this measurement to occur when spatial characteristics are matched (determined through the time unit calculation), ensures accurate CSI reporting even during mode switching operations
2Productivity
If the terminal performs channel measurement based on downlink reference signal, then the productivity of channel state information acquisition is improved, but the measurement precision deteriorates due to mismatched spatial characteristics
Solution Approach 1:
The patent applies preliminary action by calculating the second time unit in advance using the first time unit and preset offset value. This preliminary timing determination ensures that when the terminal performs channel measurement on downlink reference signals, the spatial characteristics are properly matched, thereby maintaining both measurement efficiency and precision simultaneously
Data Source
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AI summary
The present application belongs to the technical field of communications. Disclosed are a CSI report transmission method and apparatus, and a terminal, a network-side device and a medium. The CSI report transmission method in the embodiments of the present application comprises: a terminal receiving a CSI reporting configuration from a network-side device; and the terminal sending a first CSI report to the network-side device in a first time unit on the basis of the CSI reporting configuration, wherein the first CSI report comprises CSI, which is measured in a second time unit, the second time unit is determined on the basis of at least one of a third time unit and a first time-frequency type, the third time unit is determined according to the first time unit and a preset offset value, and the first time-frequency type comprises at least one of the following: a time-frequency type of the third time unit, and a time-frequency type which is indicated by the network-side device.