Channel Information Segmentation for High-Precision CSI Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face challenges in obtaining high-precision channel state information (CSI) due to compression, which is necessary for AI-based training and monitoring, leading to low precision and inefficient resource utilization.
Innovation Solution
The method involves segmenting ground truth channel information into multiple segments and transmitting them via UCI, ensuring each segment's length is within the maximum code length supported by UCI, allowing for high-precision channel information feedback with controlled overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ground truth channel information is transmitted with high precision, then the accuracy of AI model training and monitoring is improved, but the feedback overhead exceeds the maximum code length supported by UCI
Solution Approach 1:
The patent divides the ground truth channel information into multiple segments, where each segment's length is less than or equal to the maximum code length supported by UCI. This segmentation allows the complete high-precision CSI to be transmitted through multiple UCI messages without exceeding the code length limit, thereby resolving the contradiction between maintaining high precision and controlling feedback overhead.
2Quantity of substance
If ground truth channel information is compressed to fit within UCI code length limits, then feedback overhead is controlled, but the precision of CSI is reduced
Solution Approach 1:
Instead of compressing the channel information which would reduce precision, the patent segments the complete high-precision ground truth channel information into multiple parts. Each segment fits within the UCI code length limit and is transmitted separately, preserving the original precision while controlling the overhead of each individual UCI message.
3Measurement precision
If multiple pieces of UCI are used to transmit segmented channel information, then high-precision CSI can be obtained, but the complexity of the transmission process increases
Solution Approach 1:
The patent segments the channel information into multiple parts to be transmitted through multiple UCI messages. While this does increase the number of transmission steps, it provides a systematic and manageable approach that preserves precision. The segmentation creates a clear structure for transmission and reception, making the complex process organized and implementable.
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
Embodiments of this application provide a communication method and a communication apparatus. The method includes: generating first channel information, where the first channel information includes K segments, K is an integer greater than 1, a length of each of the K segments is less than or equal to a first threshold, a type of the first channel information is ground truth channel information, and the first channel information is any one of the following: a channel response, a channel eigenvector matrix, a precoding matrix, reference signal received power, or a signal to interference plus noise ratio; and transmitting a part or all of K pieces of uplink control information (uplink control information, UCI) to a network device, where the K pieces of UCI respectively include the K segments. The solutions in embodiments of this application may be applied to a communication system with an AI/ML function, to enable a network device to obtain high-precision channel information.