CSI Report Offset Timing for Accurate Duplex Mode Switching
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Solution Overview
Problem
The accuracy of channel state information (CSI) reporting is poor due to changes in antenna configuration during mode switching between full-duplex and half-duplex operations in base stations, leading to mismatched measurement results and inaccurate channel measurements.
Innovation Solution
A CSI reporting method that determines the second time unit based on a third time unit and a preset offset value, and includes CSI measured in a first time unit, 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 operational flexibility is improved, but the antenna configuration changes causing CSI reporting accuracy to deteriorate
Solution Approach 1:
The patent applies preliminary action by determining the second time unit in advance based on the first time unit and offset value before CSI measurement and reporting occurs. This ensures that the measurement timing is pre-coordinated with the downlink reference signal transmission timing, so when mode switching occurs, the terminal already has the correct timing relationship established, preventing accuracy degradation from mismatched measurements.
Solution Approach 2:
The patent applies dynamics by making the time unit determination dynamic and adaptable to mode switching conditions. The second time unit is dynamically determined based on the first time unit and offset value, allowing the system to adapt timing relationships in real-time during mode transitions, ensuring continuous accuracy despite changing operational modes.
2Ease of operation
If the terminal uses fixed timing for CSI measurement, then the measurement process is simplified, but the mismatch between measurement results and downlink reference signals worsens accuracy
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the timing parameter (second time unit) based on the first time unit and offset value. Instead of using fixed timing, the system changes the timing parameter to match the actual downlink reference signal transmission timing, resolving the contradiction between simple fixed timing and accurate matched timing.
3Loss of time
If the terminal reports CSI based on outdated measurements, then the reporting delay is reduced, but the relevance of CSI to current channel conditions deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-determining the second time unit based on the first time unit and offset value before the actual measurement and reporting occurs. This advance timing coordination ensures measurements are taken at the optimal moment with minimum delay while maintaining relevance to current channel conditions.
Data Source
AI summary
A channel state information (CSI) report transmission method includes: receiving, by a terminal, a CSI reporting configuration from a network-side device; and sending, by the terminal based on the CSI reporting configuration, a first CSI report to the network-side device in a first time unit; wherein the first CSI report includes CSI measured in a second time unit, and the second time unit is determined based on at least one of a third time unit and or a first time-frequency type; and the third time unit is determined based on the first time unit and a preset offset value, and the first time-frequency type includes either of the following: a time-frequency type of the third time unit, and or a time-frequency type indicated by the network-side device.