SRS and CSI Configuration for Multi-TRP Channel Measurement
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently acquiring and reporting channel state information (CSI) in network cooperative communication systems, which is crucial for optimizing signal transmission and reception.
Innovation Solution
A method and apparatus for a terminal in a wireless communication system to receive configuration information for sounding reference signal (SRS) and CSI reports from a base station, and to transmit SRS and CSI reports based on this information, enabling effective channel state measurement and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional CSI acquisition methods are used in network cooperative communication systems, then the system structure is simple, but the measurement precision and signal quality are insufficient
Solution Approach 1:
The patent segments the CSI acquisition process into multiple independent components: SRS transmission for uplink channel measurement, downlink channel measurement, and CSI report generation. This segmentation allows each component to be optimized independently, improving measurement precision while maintaining manageable system complexity through modular design
Solution Approach 2:
The patent introduces SRS (Sounding Reference Signal) as an intermediary element that facilitates accurate CSI measurement. The SRS acts as a mediator between the terminal and base station, enabling the terminal to measure downlink channel characteristics by transmitting uplink reference signals, thus improving measurement precision without requiring direct downlink signal analysis
2Productivity
If CSI is acquired through multiple TRPs (Transmission and Reception Points), then the signal quality and data rates improve, but the complexity of configuration and measurement increases
Solution Approach 1:
The patent makes the SRS resource configuration universal by allowing a single configuration to serve multiple TRPs. The terminal can measure channels from multiple TRPs using the same measurement framework and processing procedures, enabling multi-TRP operation to improve data rates while avoiding proportional increase in configuration complexity
Solution Approach 2:
The patent handles multi-TRP complexity by adding a spatial dimension to the measurement process. Instead of treating each TRP as a completely separate measurement system, the patent measures channels from multiple TRPs simultaneously using the same temporal and frequency resources, organizing the complexity into a structured spatial measurement framework
3Measurement precision
If the terminal transmits both SRS and CSI reports, then the channel state information is accurately captured, but the transmission time and latency increase
Solution Approach 1:
The patent applies preliminary action by having the terminal transmit SRS signals before the actual data transmission. This allows the base station to acquire channel state information in advance, enabling faster CSI reporting and reducing overall transmission latency. The SRS transmission serves as a preparatory step that facilitates subsequent rapid communication
4Reliability
If the base station receives CSI reports from multiple TRPs, then the signal transmission is optimized, but the processing load and time increase
Solution Approach 1:
The patent merges the processing of CSI reports from multiple TRPs into a unified procedure. Instead of treating each TRP's CSI report as a completely independent processing task, the base station combines and processes these reports simultaneously using the same processing framework, improving signal transmission reliability while minimizing the increase in processing time through efficient consolidation
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system includes receiving, from a base station, first configuration information on a sounding reference signal (SRS) resource, receiving, from the base station, second configuration information for a channel state information (CSI) report, transmitting, to the base station, an SRS for a first channel between a first transmission and reception point (TRP) and the terminal based on the first configuration information, and transmitting, to the base station, the CSI report including a measurement result of a second channel between a second TRP and the terminal based on the second configuration information.