CSI-RS Measurement Scheduling for Accurate 3D Channel Reporting
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Solution Overview
Problem
The challenge of ensuring accurate channel state information (CSI) reporting in 5G communication systems, particularly with the introduction of three-dimensional channel information computation, is exacerbated by the difficulty in terminal devices completing CSI measurements within appropriate time frames, leading to resource inefficiencies and potential performance degradation.
Innovation Solution
A method and apparatus that allow terminal devices to receive configuration information for flexible time allocation of CSI-RS measurements, enabling more efficient computation of CSI by adjusting the measurement moments and gaps, thereby ensuring sufficient time for CSI operations without resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional channel information computation is implemented using a CSI-RS burst with multiple measurement moments, then measurement precision is improved, but device complexity increases due to the challenging computation requirements
Solution Approach 1:
The patent applies preliminary action by having the terminal device receive and store measurement signals at multiple predetermined moments before the CSI reporting is needed. The measurement moments are configured in advance with appropriate time gaps, allowing the terminal to prepare and store the necessary measurement data without requiring complex real-time computation during the critical reporting period.
Solution Approach 2:
The patent segments the channel measurement process into multiple discrete measurement moments with defined time gaps between them. By dividing the measurement process into separate temporal segments rather than requiring continuous complex computation, the patent reduces the computational burden on the terminal device while maintaining measurement precision through the accumulation of measurements at different moments.
2Productivity
If the measurement gap between adjacent measurement moments is reduced to increase spectral efficiency, then productivity is improved, but device complexity increases due to tighter computation time constraints
Solution Approach 1:
The patent applies dynamics by allowing flexible configuration of measurement gaps between adjacent measurement moments. The time gap can be dynamically adjusted based on system requirements, enabling optimization between spectral efficiency and computation complexity. The network can configure appropriate gaps that balance productivity gains with terminal device capability constraints.
Solution Approach 2:
The patent changes the temporal parameter (measurement gap) to optimize system performance. By adjusting the time gap between measurement moments, the system can achieve higher spectral efficiency while ensuring that the terminal device has sufficient time to complete computations, thus balancing productivity improvement with complexity management.
3Loss of time
If the time domain location of CSI reference resource is set too close to CSI report, then loss of time is reduced, but measurement precision deteriorates due to insufficient computation time
Solution Approach 1:
The patent applies preliminary action by performing measurements at multiple moments before the CSI reporting is required. The measurement signals are received and stored in advance, allowing the terminal device to have sufficient computation time between the last measurement moment and the CSI report while minimizing overall time loss through efficient measurement scheduling.
Solution Approach 2:
The patent uses periodic action by configuring measurement moments with appropriate periodic gaps between them. This periodic measurement structure ensures that sufficient time is allocated for computation while maintaining efficient use of time resources. The periodic gaps allow the terminal device to complete computations accurately without excessive time loss.
4Measurement precision
If multiple measurement moments are used for three-dimensional channel information, then measurement precision is improved, but loss of time increases due to extended measurement duration
Solution Approach 1:
The patent segments the measurement process into multiple discrete moments with optimized time gaps. By segmenting rather than using continuous measurement, the system achieves high measurement precision for three-dimensional channel information while minimizing total measurement duration through efficient temporal distribution of measurements.
Solution Approach 2:
The patent optimizes the time parameter (measurement gap) to balance measurement precision and total measurement duration. By adjusting the gap between measurement moments, the system can achieve accurate three-dimensional channel information with minimal time loss, optimizing the trade-off between precision and time efficiency.
Data Source
AI summary
Embodiments of this application provides a method and an apparatus for channel measurement. A network device sends first information, where the first information indicates K sending moments for sending an NZP CSI-RS and a sending gap m between adjacent sending moments in the K sending moments. After receiving the first information, a terminal device may determine a time domain location of a target CSI reference resource, and receive a measurement signal before the target CSI reference resource (time domain location). The terminal device reports, based on the measurement signal, CSI to the network device at a time domain location of CSI report, and the network device receives the reported CSI. According to the method in embodiments of this application, channel measurement and determining of channel information can be effectively completed, to ensure communication performance of the terminal device.