Reference Signal Resource Configuration Index for CSI Feedback
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Solution Overview
Problem
Current wireless communication systems face challenges in managing increased antenna ports, leading to excessive resource overheads and complexity in channel state information (CSI) measurement for user equipment, which hampers system capacity and coverage.
Innovation Solution
The user equipment receives a reference signal set corresponding to a resource configuration index, determining CSI based on this set and reporting it to the base station, thereby reducing time-frequency resource usage and measurement complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If more antenna ports are configured to improve system capacity and coverage, then system capacity and coverage are improved, but resource overheads and CSI measurement complexity increase excessively
Solution Approach 1:
The patent segments the reference signal resources by introducing a reference signal resource configuration index that points to different reference signal resource configurations. This allows the system to divide the large number of antenna ports into multiple groups, each with its own reference signal configuration, thereby reducing the complexity of CSI measurement while maintaining support for multiple antenna ports.
Solution Approach 2:
The patent introduces dynamic selection of reference signal resource configurations through the reference signal resource configuration index. The user equipment can dynamically select which reference signal configuration to measure based on the index, allowing the system to adaptively manage resource overhead and measurement complexity according to actual channel conditions and system requirements.
2Productivity
If more antenna ports are configured to improve system capacity and coverage, then system capacity and coverage are improved, but time-frequency resource overheads increase excessively
Solution Approach 1:
The patent segments reference signal resources across different time-frequency resources by defining multiple reference signal resource configurations. Each configuration can use different time-frequency patterns, allowing the system to distribute reference signals for multiple antenna ports across different resources rather than concentrating them, thereby reducing instantaneous resource overhead.
Solution Approach 2:
The patent implements periodic transmission of reference signals with different configurations across time. The reference signal resource configuration index can indicate different periodic patterns, allowing the system to transmit reference signals for multiple antenna ports periodically rather than simultaneously, reducing peak time-frequency resource overhead while maintaining measurement capability.
Data Source
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Figure 1c
Figure 1d
AI summary
Embodiments of the present invention disclose a method for reporting channel state information, including: receiving a sounding signal set sent by the base station; determining a reference signal resource configuration index according to the sounding signal set, where the reference signal resource configuration index is used to indicate a reference signal resource configuration in reference signal resource configuration set information; receiving a reference signal set sent by the base station, where the reference signal set corresponds to the reference signal resource configuration; determining channel state information according to the reference signal set; and sending the reference signal resource configuration index and the channel state information to the base station. Correspondingly, the embodiments of the present invention further disclose user equipment and a base station for reporting channel state information. According to the present invention, time-frequency resource overheads can be saved effectively, and complexity of CSI measurement performed by the user equipment can be reduced effectively or CSI feedback precision can be improved.