Mobile Terminal CSI Measurement With Doppler Shift Reporting
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Solution Overview
Problem
Existing radio communication systems struggle to accurately measure and report the impacts of movement on channel state information (CSI) for terminals moving at medium speeds, leading to degraded communication throughput and quality.
Innovation Solution
A terminal equipped with a control section to measure Doppler shift and determine CSI based on a CSI-reference signal, and a transmitting section to report the CSI, enhancing measurement and reporting on the impacts of movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional CSI measurement methods are used for moving terminals, then measurement process is simple, but measurement precision of movement impacts deteriorates
Solution Approach 1:
The patent segments the CSI measurement process into distinct components: conventional CSI measurement functionality and new Doppler shift measurement functionality. The control section is divided to handle different measurement tasks separately, allowing precise movement impact measurement while maintaining manageable system complexity through functional segmentation.
Solution Approach 2:
The patent introduces Doppler shift measurement as an additional dimension to traditional CSI measurement. By measuring frequency shifts caused by terminal movement and combining this with conventional CSI parameters, the system achieves comprehensive movement impact assessment without overwhelming complexity increase.
2Measurement precision
If Doppler shift measurement is added to CSI measurement, then measurement precision of movement impacts is improved, but device complexity increases
Solution Approach 1:
The patent merges Doppler shift measurement with existing CSI measurement processes in the control section. By combining these measurements and integrating their results into unified CSI determination, the system achieves precise movement impact measurement while avoiding the complexity of completely separate measurement systems through functional integration.
Solution Approach 2:
The control section is designed with multi-functionality to handle both conventional CSI measurement and Doppler shift measurement using the same reference signals. This universal approach allows the control section to perform multiple measurement functions without proportionally increasing complexity, as the same hardware and signal processing resources serve multiple purposes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Proper measurement and reporting of movement-related impacts on CSI are achieved, improving communication performance for moving terminals.
Implementation Method 1
a control section that performs a measurement on a Doppler shift of a channel state information (CSI)-reference signal (RS)
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a control section that performs a measurement on a Doppler shift of a channel state information (CSI)-reference signal (RS) and determines channel state information (CSI) based on the measurement, and a transmitting section that transmits a reporting of the CSI. According to one aspect of the present disclosure, the measurement/reporting on the impacts of movement can be properly performed.