CSI Resource Grouping for TRP-Specific Beam Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) for TRP-specific beam management, particularly in supporting high data traffic, increased transmission rates, and low latency, while maintaining energy efficiency.
Innovation Solution
A method and apparatus for transmitting and receiving CSI, involving the configuration of CSI reports and resources, with group-based reporting, where user equipment receives CSI-reference signals and downlink control information to determine minimum time and processing units required for CSI reporting, enabling effective TRP-specific beam management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If group-based reporting is configured with multiple CSI resource sets (M>1) and CSI resource groups (N>1), then TRP-specific beam management capability is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent segments CSI resources into multiple resource sets (first CSI resource set, second CSI resource set, etc.) and organizes them into CSI resource groups (first group, second group, etc.). Each resource set contains CSI resources associated with specific TRPs, allowing the system to handle multiple TRPs independently while maintaining overall coordination. This segmentation enables TRP-specific beam management without requiring the entire CSI processing system to handle all TRPs simultaneously, thus reducing processing complexity.
Solution Approach 2:
The patent introduces a group dimension (N CSI resource groups) in addition to the resource set dimension (M resource sets). This creates a two-dimensional structure where resources are organized both by TRP-specific sets and by reporting groups. This dimensional organization allows the system to manage complexity by providing multiple levels of abstraction and control, enabling efficient TRP-specific beam management across multiple dimensions.
2Measurement precision
If multiple CSI resources from different resource sets are simultaneously received, then measurement accuracy and beam management precision are improved, but processing time and computational resources increase
Solution Approach 1:
The patent configures multiple CSI resource sets and groups in advance through higher-layer signaling (RRC configuration) before actual CSI measurement and reporting occurs. The UE is pre-configured with the structure of M resource sets and N groups, including which resources belong to which sets and groups. This preliminary configuration allows the UE to efficiently process simultaneous CSI resources from different TRPs without requiring complex runtime decisions, thus reducing processing time while maintaining measurement accuracy.
3Productivity
If minimum time parameters (Z, Z') and CPU resources are dynamically determined based on N groups configuration, then resource allocation efficiency is improved, but control signaling overhead increases
Solution Approach 1:
The patent uses higher-layer signaling (RRC configuration) as an intermediary to pre-configure the structure of CSI resource sets and groups, including the values of M and N and their associations. This intermediary configuration layer separates the structural definition from the dynamic resource allocation, allowing efficient CSI reporting without requiring excessive dynamic control signaling. The DCI can then trigger CSI reports with minimal additional overhead since the basic structure is already established through the intermediary RRC configuration.
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, on the basis that a group-based report is configured by the first configuration information, the second configuration information includes information on M (M is a natural number) CSI resource sets associated with the first configuration information; receiving, from the base station, a CSI-reference signal (CSI-RS) through a plurality of CSI resources of the M CSI resource sets on the basis of the second configuration information; receiving, from the base station, downlink control information (DCI) for triggering a CSI report; and transmitting, to the base station, the CSI report on the basis of the DCI and the first configuration information.