Multi-Codebook CSI Measurement for Scalable Downlink MIMO
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Solution Overview
Problem
Current wireless communication systems lack the capability to efficiently measure and report channel state information (CSI) for multiple sets of antenna ports, which is essential for scalable multiple-input multiple-output (MIMO) systems, leading to outdated CSI reports due to violations of minimum timing requirements and inefficient CPU utilization.
Innovation Solution
A method and apparatus for measuring and reporting CSI based on multiple CSI report configurations, allowing for simultaneous measurement and reporting of CSI for multiple sets of antenna ports, with flexible CPU allocation and linkage between configurations, ensuring compliance with minimum timing requirements and optimizing CPU usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI measurement is performed for multiple sets of antenna ports simultaneously, then the accuracy and timeliness of CSI reports are improved, but the CPU occupancy and system complexity increase
Solution Approach 1:
The patent segments the CSI measurement task by dividing antenna ports into multiple sets, each associated with a separate codebook. This allows the UE to measure CSI for different antenna port sets independently using separate codebooks, improving measurement accuracy while managing complexity through structured organization of measurement tasks.
Solution Approach 2:
The patent introduces a new dimension of organization by associating multiple codebooks with different antenna port sets. This dimensional approach enables simultaneous CSI measurement for multiple antenna configurations without overwhelming the UE's processing capacity, as each codebook operates in its own dimensional space.
2Loss of time
If minimum timing requirements are strictly enforced for CSI measurement, then the timeliness of CSI reports is improved, but the CPU occupancy increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple codebooks with different antenna port set associations before CSI measurement is needed. This allows the UE to have measurement templates ready in advance, enabling timely CSI reports without requiring excessive CPU occupancy during the actual measurement period, as the measurement framework is already in place.
3Adaptability or versatility
If multiple codebooks are configured for different antenna port sets, then the versatility of CSI measurement is improved, but the CPU occupancy increases
Solution Approach 1:
The patent implements universality by creating a multi-functional codebook structure where each codebook can be associated with different antenna port sets. This universal codebook design allows the same measurement framework to handle various antenna configurations, improving versatility while the patent manages CPU occupancy through efficient resource allocation and linkage mechanisms between codebooks.
Data Source
AI summary
A user equipment (UE) includes a processor configured to receive, from a radio access network (RAN), at least one channel state information (CSI) report configuration. The at least one CSI report configuration identifies two or more (N) codebooks. Each codebook of the N codebooks is based on a respective set of antenna ports of two or more sets of antenna ports. The two or more sets of antenna ports include a first set of antenna ports and one or more additional sets of antenna ports. Each of the one or more additional sets of antenna ports includes a respective set of antenna ports selected from the first set of antenna ports. The processor is further configured to measure CSI based on at least one of the N codebooks, and transmit, to the RAN, at least one CSI report based on the measured CSI.