CSI Measurement Configuration for Time-Varying NR Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In NR systems, the time-varying characteristics of channels cause an offset between past CSI channel information reported by the base station and the CSI channel information required for scheduling, leading to inefficiencies in spectrum efficiency and capacity.
Innovation Solution
A method for CSI measurement and reporting that includes acquiring CSI measurement configuration information, which may include reference signal, usage conditions, and measurement resource configurations, and performing CSI measurements based on these configurations, potentially using AI modes for prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI measurement is performed based on past channel information, then the measurement process is simple, but the accuracy of CSI for current scheduling deteriorates due to channel time-variation
Solution Approach 1:
The system performs preliminary CSI measurements at multiple past time points (t-1, t-2, ..., t-k) and stores these measurements for later use. By having these measurements ready in advance, the system can quickly generate current CSI estimates without waiting for new measurements, thus reducing time delay while maintaining accuracy through the use of multiple historical data points.
Solution Approach 2:
The system continuously feeds back CSI measurements from multiple time points to the base station. The base station uses this feedback information along with channel state indicators (CSI-RSRP, CSI-SINR, CSI-RI) to dynamically adjust and refine CSI estimates for current scheduling decisions, improving measurement accuracy through iterative feedback processing.
2Measurement precision
If multiple CSI measurement time points are used, then the accuracy of current CSI estimation improves, but the complexity of measurement and processing increases
Solution Approach 1:
The system segments the CSI measurement process into distinct time-point measurements (t-1, t-2, ..., t-k), where each measurement is performed independently on separate reference signals. This segmentation allows parallel processing of individual measurements and simplifies the overall complexity by breaking down the complex task of current CSI estimation into manageable independent components that can be processed and combined systematically.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a communication method, a user equipment, and a base station. The communication method comprises: acquiring CSI measurement configuration information; and, performing CSI measurement and reporting based on the CSI measurement configuration information. By acquiring CSI measurement configuration information and performing CSI measurement and reporting based on the CSI measurement configuration information, this scheme avoids the offset of CSI measurement caused by the time-varying characteristics of channels, and improves the spectrum efficiency and capacity of the wireless communication system.