CSI Reference Timing for Multi-TRP Reporting Completion
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Solution Overview
Problem
The challenge of ensuring that terminal devices have sufficient time to complete channel state information (CSI) measurement and computation for coherent joint transmission (CJT) in multi-station collaboration scenarios, leading to reduced CSI reporting success rates.
Innovation Solution
Determine the time domain position of CSI reference resources based on the quantity of reference signal resources and the terminal's capability, ensuring adequate time for CSI measurement and computation by defining minimum intervals between CSI reporting and triggering signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple reference signal resources are used for CSI measurement in multi-station collaboration, then the system throughput and user experience are improved, but the measurement and computation complexity increases significantly
Solution Approach 1:
The patent segments the joint CSI feedback process into multiple independent CSI reports, each corresponding to a specific TRP. This allows the terminal to measure and report CSI for each TRP separately rather than computing a single complex joint CSI, reducing computational complexity while maintaining the benefits of multi-station collaboration
Solution Approach 2:
The patent introduces a new dimension for CSI reporting by enabling simultaneous CSI feedback for multiple TRPs through separate reporting mechanisms. This dimensional expansion allows the system to handle multi-station collaboration without increasing the computational burden on the terminal device
2Reliability
If the terminal device is required to complete joint CSI measurement and computation for multiple TRPs, then coherent joint transmission is enabled, but the time required for measurement and computation increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring multiple independent CSI reporting resources and measurement configurations for different TRPs. This allows the terminal to have ready-made reporting paths and measurement procedures, reducing the time required when actual CSI measurement and reporting are needed
Solution Approach 2:
The patent implements dynamic CSI reporting where the terminal can selectively report CSI for individual TRPs or combinations of TRPs based on current channel conditions and timing requirements. This dynamic approach allows flexible adaptation to time constraints while maintaining reliable CSI feedback
3Ease of operation
If a fixed time domain position is used for CSI reference resource, then the system operation is simplified, but the terminal device cannot complete CSI computation and reporting within the specified time
Solution Approach 1:
The patent makes the time domain position of CSI reference resources dynamic by associating it with the quantity of reference signal resources. This allows the system to automatically adjust timing parameters based on the number of TRPs being served, ensuring sufficient computation time while maintaining operational simplicity through standardized adjustment rules
Data Source
AI summary
This application provides a method for determining a channel state information measurement parameter and a related apparatus. The method includes: A terminal device receives, from a network device, first information indicating a quantity NTRP of reference signal resources used for channel state information (channel state information, CSI) measurement, where a CSI reporting type is aperiodic CSI reporting, and NTRP is a positive integer greater than or equal to 1. The terminal device determines a time domain position of a CSI reference resource based on the first information. The technical solutions provided in this application can increase a success rate of reporting CSI by the terminal device.