Radio Communication Device CSI Feedback Mechanism
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Solution Overview
Problem
Radio communication devices face challenges in efficiently transmitting limited bandwidth information related to reception quality measurements, particularly in scenarios where periodic UE Selected Subband CSI is implemented, leading to outdated or invalid CSI reports that affect channel tracking and throughput.
Innovation Solution
Incorporating a measurement circuit to assess both wideband and subband reception qualities, with a comparison circuit to determine the validity of previously transmitted information, allowing for efficient transmission of updated CSI reports using additional signaling bits to indicate report status, thereby reducing reporting intervals and improving channel tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic UE Selected Subband CSI is transmitted to enable channel tracking, then channel tracking capability is improved, but the information becomes outdated or invalid leading to reduced throughput
Solution Approach 1:
The patent implements a feedback mechanism where the receiving device evaluates the quality of received CSI reports and feeds back indication information to the transmitting device. This feedback loop allows the system to identify when CSI reports become outdated or invalid and adjust transmission behavior accordingly, resolving the contradiction between maintaining channel tracking capability and preserving throughput by eliminating useless reports through feedback-based validation.
Solution Approach 2:
The patent changes the parameter of CSI report validity by introducing quality evaluation metrics that assess whether reported channel state information remains accurate and useful. By dynamically determining and signaling the validity status of CSI reports, the system transforms raw measurement data into validated information, enabling the receiver to distinguish between current accurate CSI and outdated reports, thus maintaining both tracking capability and throughput efficiency.
2Measurement precision
If measurement and reporting of reception quality is performed, then channel state information accuracy is improved, but bandwidth for transmitting information is limited
Solution Approach 1:
The patent extracts only the essential validity indication information from the full CSI report and transmits it separately as indication information. This extraction approach allows the system to maintain accurate reception quality measurements while reducing the bandwidth required for transmission by separating the validation status signal from the main measurement data, thereby addressing the bandwidth limitation without sacrificing measurement accuracy.
Solution Approach 2:
The patent segments the CSI reporting process into two components: the full measurement data and the validity indication. By dividing the information transmission into these segments, the system can prioritize transmitting only the critical validity status when bandwidth is constrained, while still maintaining the ability to process and utilize accurate channel state information when available, thus resolving the contradiction between measurement precision and transmission bandwidth.
3Reliability
If validation of previously transmitted information is performed, then information quality is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service validation where the transmitting device autonomously evaluates the quality of its own previously transmitted CSI reports using stored reference information and comparison circuits. This self-validation mechanism eliminates the need for complex external validation systems or additional signaling protocols, thereby improving information quality reliability while minimizing the increase in device complexity by leveraging the transmitting device's existing processing capabilities.
Data Source
AI summary
A radio communication device may be provided. The radio communication device may include: a measurement circuit configured to measure a first reception quality of a first signal from another radio communication device and configured to measure a second reception quality of a second signal from the other radio communication device; a transmitter configured to transmit information related to the measured first reception quality to the other radio communication device; a memory configured to store information related to the transmitted information; a comparison circuit configured to compare information related to the measured second reception quality with the stored information; a determiner configured to determine a quality of the previously transmitted information based on the comparison by the comparison circuit; and the transmitter further configured to transmit to the other radio communication device information indicating the determined quality of the previously transmitted information.