Near-Field Visibility Region Selection for MIMO CSI Configuration
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Solution Overview
Problem
Existing MIMO systems in wireless communications face challenges in optimizing near field visibility regions for User Equipment (UE), which affects data rate, latency, and reliability, particularly in next-generation radio communication systems like 5G NR.
Innovation Solution
A base station (BS) with an antenna array defines and manages visibility regions (VRs) associated with subsets of its antenna ports, transmitting CSI configurations to UE, receiving quality measurement reports, and selecting optimal VRs based on these reports to enhance communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the BS configures multiple CSI resource sets for different VRs, then the measurement precision and channel state information accuracy are improved, but the device complexity and configuration overhead increase
Solution Approach 1:
The patent segments the antenna array into multiple visibility regions (VRs), each associated with a subset of antenna ports. The BS configures multiple CSI resource sets, where each set corresponds to a specific VR. This segmentation allows the system to measure channel state information separately for each VR, improving measurement precision while managing complexity through structured organization of the segmentation.
Solution Approach 2:
The BS performs preliminary configuration by defining multiple VRs and associating them with CSI resource sets before actual channel measurement. The BS determines the VRs based on antenna array geometry and pre-configures the corresponding CSI resource sets, enabling efficient subsequent measurements without real-time complex calculations.
2Reliability
If the BS selects VRs based on channel quality measurement reports, then the reliability and data rate are improved, but the processing time and latency increase
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures channel quality for configured CSI resource sets and reports the results to the BS. The BS uses these feedback reports to select the appropriate VR for communication. This feedback loop enables reliable VR selection based on actual channel conditions while maintaining efficient processing through structured measurement and reporting procedures.
3Adaptability or versatility
If the system supports multiple VRs with different antenna port subsets, then the adaptability and versatility are improved, but the ease of operation and system management become more difficult
Solution Approach 1:
The patent creates a universal framework where the BS can configure multiple VRs with different antenna port subsets, and the UE can operate with any of these VRs based on channel conditions. The CSI resource set structure serves multiple functions: it defines VRs, associates antenna ports, and enables systematic measurement. This multi-functional approach improves adaptability while simplifying management through a unified configuration structure.
Data Source
AI summary
A method for a base station (BS) is provided. The method defines several basic visibility regions (VRs). Each basic VR is associated with a non-overlapping subset of the antenna ports of the BS. The method transmits a first CSI configuration that includes several CSI resource sets to a UE. Each CSI resource set identifies one or more CSI resources for one of the basic VRs. The method receives a set of channel quality measurement reports from the UE, each of which corresponds to a CSI resource set. The method then selects, for the UE, a UE-specific VR based on the set of channel quality measurement reports. The UE-specific VR includes one or more basic VRs. The method then transmits, to the UE, a second CSI configuration that includes a set of CSI resource sets, each of which identifies one or more resources for a basic VR of the UE-specific VR.