Channel State Information Feedback Segmentation for Signaling Overhead Reduction
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Solution Overview
Problem
In mobile communication, the feedback period of channel state information (CSI) from terminals to network devices is challenging to optimize, as short periods increase signaling overhead while long periods lead to poor accuracy, especially at medium to high speeds.
Innovation Solution
The method involves sending channel state information, including time domain and Doppler domain parameters, from terminals to network devices, allowing for determination of channel coherence time, thereby reducing signaling overhead and improving CSI feedback accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the period of CSI feedback is shortened to improve accuracy, then CSI feedback accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent segments CSI feedback into two parts: wideband CSI feedback sent periodically, and subband CSI feedback sent only when channel conditions change significantly. This segmentation allows the system to maintain accurate CSI representation without transmitting redundant information, thereby reducing signaling overhead while preserving measurement precision.
Solution Approach 2:
The patent implements periodic wideband CSI feedback combined with event-triggered subband CSI feedback. The periodic wideband feedback provides baseline channel information, while subband feedback is transmitted periodically or aperiodically based on channel variation thresholds. This periodic action structure ensures accuracy without excessive signaling overhead.
2Quantity of substance
If the period of CSI feedback is lengthened to reduce signaling overhead, then signaling overhead is reduced, but CSI feedback accuracy deteriorates
Solution Approach 1:
The patent divides CSI feedback into wideband and subband components with different reporting periods. Wideband CSI is reported periodically at longer intervals, while subband CSI is reported only when channel variations exceed thresholds. This segmentation enables reduced overall signaling overhead while maintaining accuracy through selective subband reporting.
Solution Approach 2:
The patent dynamically adjusts feedback parameters including wideband and subband CSI reporting periods, thresholds for triggering subband feedback, and quantization precision. By changing these parameters based on channel conditions and mobility patterns, the system reduces signaling overhead while preserving necessary CSI accuracy.
Data Source
AI summary
The present application relates to the field of mobile communication and discloses an information reporting method and apparatus, an information receiving method and apparatus, a device, and a storage medium. The method comprises: a terminal sends channel state information to a network device, the channel state information comprising a time domain parameter and/or a Doppler domain parameter. The terminal reports the channel state information comprising the time domain parameter and/or the Doppler domain parameter to the network device, where the time domain parameter and/or the Doppler domain parameter may indicate a coherence time of the channel, so as to facilitate determination of a time domain correlation of the channel on the basis of the determined coherence time of the channel; also, signaling overhead is reduced while CSI feedback accuracy is improved.