CSI Reporting Across Multiple Time Instances With PMI Filtering
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately transmitting and receiving channel state information (CSI) for multiple time instances, leading to inefficiencies in channel prediction and increased processing complexity.
Innovation Solution
A method and apparatus for transmitting and receiving CSI that involves receiving configuration information related to multiple time instances, using CSI-reference signals (CSI-RS) and precoding matrix indicators (PMI) to exclude time instances with low channel prediction accuracy, while considering the correlation between basis vectors and CSI-RS resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel state information is reported for all time instances, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts and excludes time instances with low channel prediction accuracy from the CSI reporting process. By identifying and removing these low-value time instances, the system maintains accurate channel state information for critical time points while reducing the overall processing burden and device complexity associated with handling all time instances uniformly.
Solution Approach 2:
The patent changes the parameter of time instance selection by using channel prediction accuracy as a filtering criterion. Instead of uniformly processing all time instances, the system dynamically adjusts which time instances are included in CSI reporting based on their predicted accuracy, thereby optimizing the balance between measurement precision and processing complexity.
2Productivity
If channel state information is compressed for multiple time instances, then productivity is improved, but loss of information increases
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different time instances based on their channel prediction accuracy. High-accuracy time instances retain more detailed CSI information, while low-accuracy instances undergo greater compression or exclusion. This localized approach to information retention optimizes the balance between reporting efficiency and information preservation.
3Measurement precision
If CSI-RS resources are increased for channel measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies partial action by selectively measuring and reporting CSI only for time instances that meet a certain accuracy threshold, rather than uniformly processing all time instances. This partial measurement approach reduces the effective number of CSI-RS resources needed while maintaining sufficient measurement precision for critical time points, thereby reducing device complexity.
Data Source
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AI summary
A method and a device for transmitting/receiving channel state information (CSI) in a wireless communication system are disclosed. The method according to an embodiment of the present disclosure may comprise the steps of: receiving CSI-related configuration information from a base station, the configuration information including information associated with a plurality of time instances; receiving a CSI-RS on K (K is an integer greater than 0) CSI-RS resources from the base station; and transmitting CSI to the base station, the CSI including a PMI corresponding to codebook indexes.