Group-Based CSI Reporting for Multi-TRP Beam Ambiguity
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Solution Overview
Problem
The existing mobile communication systems face challenges in efficiently managing channel state information (CSI) due to the increasing demand for faster data services and the need for advanced beam management in multi-TRP environments, leading to ambiguity and increased complexity in CSI transmission and reception.
Innovation Solution
A method and apparatus for transmitting and receiving CSI that employs group-based reporting, where CSI resources are configured in sets and groups, allowing for the calculation of differential L1-RSRP/L1-SINR values and CSI resource set information, ensuring clear transmission and reduced complexity even with varying beam differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If group-based reporting is configured for multiple CSI resource sets, then beam reporting capability is enhanced for multiple TRPs, but ambiguity and complexity in CSI transmission increase
Solution Approach 1:
The patent segments the CSI resource groups into multiple CSI resource sets, where each set is associated with a specific TRP. This segmentation allows the UE to report CSI for different TRPs separately, enhancing beam reporting capability while managing complexity through structured organization of CSI resources.
Solution Approach 2:
The patent introduces a new dimension by configuring multiple CSI resource sets (M sets) where each set corresponds to a different TRP. This multi-dimensional approach allows simultaneous beam reporting for multiple TRPs by adding the TRP dimension to the traditional single CSI resource structure.
2Measurement precision
If the number of CSI resource pairs/groups is large, then comprehensive channel state coverage is improved, but ambiguity in CSI identification increases
Solution Approach 1:
The patent divides a large number of CSI resources into multiple smaller CSI resource sets, each associated with a specific TRP. This segmentation maintains comprehensive channel state coverage while improving identification clarity by limiting the number of resources within each set, making it easier to identify and manage individual CSI resources.
Solution Approach 2:
The patent introduces TRP-specific identification as an intermediary mechanism to distinguish between CSI resources from different TRPs. This intermediary layer of identification prevents ambiguity by clearly associating each CSI resource with its corresponding TRP, even when the total number of resources is large.
Data Source
AI summary
Disclosed are a method and a device for transmitting or receiving channel state information in a wireless communication system. A method for transmitting channel state information (CSI) according to an embodiment of the present disclosure may comprise the steps of receiving, from a base station, first configuration information related to a CSI report and second configuration information related to a CSI resource, wherein the second configuration information includes information on M (M is a natural number) CSI resource sets associated with the first configuration information on the basis of a group-based report being configured by the first configuration information; receiving, from the base station, a CSI-reference signal (CSI-RS) on a plurality of CSI resources of the M CSI resource sets on the basis of the second configuration information; and transmitting the CSI to the base station on the basis of the first configuration information.