CSI Reporting for Multi-TRP Beam Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) and managing beams between terminals and multiple transmission reception points (TRPs), leading to suboptimal performance and increased signaling overhead.
Innovation Solution
A method and apparatus for transmitting CSI in a wireless communication system, which involves receiving configuration information from a base station, utilizing reference signals (RS) for channel and interference measurement, and reporting Layer 1 Signal-to-Interference-plus-Noise Ratio (L1-SINR) values for selected RS resource groups, optimizing beam management across multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel state information is transmitted and received between terminal and multiple TRPs, then beam management performance is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the CSI reporting process by introducing separate reporting mechanisms for different TRPs. The terminal divides the CSI feedback into multiple parts, each corresponding to a specific TRP, allowing selective reporting of channel state information for different transmission points. This segmentation enables efficient beam management across multiple TRPs while controlling signaling overhead by reporting only necessary information for each segment.
Solution Approach 2:
The patent adds a spatial dimension to CSI reporting by introducing TRP-specific reporting structures. Instead of a single aggregated CSI report, the system implements multi-dimensional reporting where CSI is organized along the TRP dimension, enabling the network to identify and select optimal beams from multiple TRPs based on spatial characteristics and channel conditions.
2Measurement precision
If reference signals are transmitted by different downlink spatial domain transmission filters, then channel measurement accuracy is improved, but transmission complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple downlink spatial domain transmission filters and their associated reference signals before actual data transmission. The base station prepares a set of candidate beams with corresponding RS resources in advance, allowing the terminal to perform accurate channel measurements on pre-established spatial filters without requiring complex real-time filter adjustments during transmission.
Data Source
AI summary
Disclosed are a method and apparatus for transmitting and 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 configuration information related to the CSI from a base station; receiving one or more reference signal (RS) resources transmitted from the base station through different downlink spatial domain transmission filters; and transmitting, to the base station, the CSI including a layer 1 signal-to-interference-plus-noise ratio (L1-SINR) generated on the basis of the one or more RS resources.