Multi-TRP CSI-RS Configuration for Scalable CSI Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) from single and/or multiple transmission reception points (TRPs) due to the increasing demand for faster data rates, higher device connectivity, and low latency, particularly in next-generation mobile communication systems.
Innovation Solution
The solution involves methods and apparatus for transmitting and receiving CSI-RS from terminals equipped with multiple panels, enabling optimal channel state information reporting and resource configuration for single and/or multiple TRPs, which enhances link adaptation and improves wireless communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel state information is transmitted from single and/or multiple TRPs to support explosive data traffic and faster transmission rates, then the transmission rate and data capacity improve, but the system complexity and resource configuration difficulty increase
Solution Approach 1:
The patent segments the channel state information transmission by dividing it into multiple TRP-specific CSI reports. Each TRP transmits independent CSI-RS resources, and the terminal generates separate CSI reports for each TRP, allowing the system to handle multiple transmission points without overwhelming complexity by treating them as modular, independent units
Solution Approach 2:
The patent introduces a new dimension of TRP identification in the CSI reporting mechanism. By adding TRP-specific resource indicators and association parameters to the existing CSI framework, the system extends the traditional single-TRP dimension to multi-TRP space, enabling scalable complexity management through dimensional expansion
2Quantity of substance
If channel state information is transmitted from single and/or multiple TRPs to accommodate increased device connectivity, then the number of connected devices improves, but the resource configuration and management difficulty increase
Solution Approach 1:
The patent creates a universal CSI reporting framework that can accommodate any number of TRPs and any terminal configuration (single-panel or multi-panel). The resource configuration mechanism uses standardized parameter structures and association rules that scale universally, allowing the same framework to serve both simple single-TRP cases and complex multi-TRP scenarios without requiring separate configuration procedures
Solution Approach 2:
The patent implements dynamic resource configuration where the network can flexibly allocate and reconfigure CSI-RS resources based on current system conditions, terminal capabilities, and traffic demands. The resource association parameters can be dynamically adjusted to match changing connectivity requirements, making the system adaptable rather than static
3Loss of time
If channel state information is transmitted from single and/or multiple TRPs to achieve very low End-to-End latency, then the latency improves, but the measurement and reporting overhead increase
Solution Approach 1:
The patent performs preliminary channel measurements at the terminal using TRP-specific CSI-RS resources before actual data transmission. By pre-measuring and pre-reporting CSI for each TRP, the system prepares the channel state information in advance, enabling faster scheduling decisions and reducing the latency of the actual data transmission without requiring extensive real-time measurements
4Use of energy by moving object
If channel state information is transmitted from single and/or multiple TRPs to support high energy efficiency, then the energy efficiency improves, but the terminal processing complexity increases
Solution Approach 1:
The patent extracts TRP-specific information from the overall channel state by separating the CSI measurement and reporting per TRP. The terminal identifies and extracts relevant channel characteristics for each individual TRP, generating focused CSI reports that contain only the necessary information for each TRP, thereby reducing the total processing load compared to handling all TRPs as a single complex entity
Data Source
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AI summary
A method and an apparatus of transmitting and receiving channel state information in a wireless communication system is disclosed. A method of transmitting channel state information (CSI) in a wireless communication system according to an embodiment of the present disclosure may include: receiving, from a base station, configuration information related to CSI; receiving, from the base station, a CSI-reference signal (CSI-RS) on a plurality of CSI-RS resources; and transmitting, to the base station, first CSI based on the configuration infor.mation. The plurality of CSI-RS resources corresponding to the configuration information may be configured with one or more channel measurement resources (CMRs) and one or more CMR pairs, the one or more CMRs may be configured to be used to derive CSI based on a single CMR, the one or more CMR pairs may be configured to be used to derive CSI based on a single CMR pair, unless there is a specific configuration by the configuration information, based on the first CSI being CSI derived based on a single CMR, any CMR included in the one or more CMR pairs may be not used to derive the first CSI.