Predictive CSI Reporting for Mobile Beamforming Accuracy
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Solution Overview
Problem
Existing CSI reporting methods in mobile communication systems, especially for multi-antenna systems, suffer from inaccuracies due to outdated channel state information caused by user equipment movement, leading to suboptimal beamforming and modulation, which reduces spectral efficiency.
Innovation Solution
Implementing a method where a first device predicts and reports channel state information for a future time period, allowing a second device to receive and utilize this predicted information, thereby enhancing accuracy and reducing the impact of movement-related inaccuracies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel state information is reported at current time, then the reporting method is simple, but the channel state information becomes outdated due to user equipment movement, leading to poor accuracy
Solution Approach 1:
The patent applies preliminary action by predicting future channel state information before it becomes outdated. The receiving end performs prediction on channel state information that will be needed in future time periods, thereby proactively obtaining accurate CSI rather than reacting after the channel changes. This resolves the contradiction by preparing accurate measurements in advance, improving precision without requiring complex real-time tracking systems.
2Measurement precision
If channel state information is updated frequently to track movement, then accuracy is improved, but the overhead and complexity of the system increases
Solution Approach 1:
Instead of continuously updating and reporting channel state information, the patent uses prediction to obtain future CSI values. The receiving end predicts channel state information for future time periods based on current and historical data, eliminating the need for frequent updates and reducing reporting overhead while maintaining accuracy.
Solution Approach 2:
The patent segments the channel state information into current measured values and predicted future values. By separating the measurement function (performed periodically) from the prediction function (performed as needed), the system reduces the quantity of information that needs to be reported and processed, lowering overhead while maintaining precision through prediction rather than continuous reporting.
3Productivity
If beamforming and modulation are optimized based on current CSI, then spectral efficiency improves, but the optimization becomes inaccurate when user equipment moves
Solution Approach 1:
The patent applies preliminary action by predicting future channel state information before beamforming and modulation optimization is needed. The receiving end predicts CSI for future time periods, allowing the transmitting end to perform accurate beamforming and modulation optimization in advance, ensuring reliability maintains accuracy even when user equipment moves during the communication process.
Data Source
AI summary
This application discloses an information reporting method and apparatus, a first device, and a second device. The method includes: reporting first information to a second device; where the first information includes predicted first channel state information or second information determined based on the predicted first channel state information, and the first channel state information includes channel state information of a first time period after a reference time point.