Adaptive CSI Reporting for Uplink Resource Efficiency
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Solution Overview
Problem
Current communication systems face inefficiencies in allocating uplink channel resources for channel state information (CSI) reporting, leading to waste of resources due to unpredictable bit quantities associated with rank indication (RI), precoding matrix indicator (PMI), and channel quality indicator (CQI) changes, resulting in insufficient or excessive resource allocation.
Innovation Solution
A method where a terminal device determines the actual CSI to report based on reference information and status parameters, allowing it to efficiently use the allocated uplink channel resources by adjusting the reporting of CSI parameters, such as RI, CQI, and PMI, to match the available resource capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device always allocates uplink channel resource based on maximum CSI bit quantity, then the resource allocation can satisfy the maximum CSI reporting requirement, but the uplink channel resource is wasted when the actual CSI bit quantity is smaller
Solution Approach 1:
The patent applies dynamics by making the CSI reporting content adaptive rather than fixed. The terminal device dynamically adjusts which CSI parameters to report based on the allocated resource quantity. When resources are sufficient, high-precision CSI with more parameters is reported; when resources are limited, lower-precision CSI with fewer parameters is reported. This dynamic adaptation resolves the contradiction between ensuring reliable CSI transmission and avoiding resource waste.
Solution Approach 2:
The patent changes the parameters of CSI reporting based on available resources. The terminal device modifies the CSI bit quantity and content by adjusting which parameters (RI, PMI, CQI) are included and their precision levels. This parameter adjustment allows the system to match the reporting detail to the allocated resource capacity, preventing both resource waste and transmission failures.
2Productivity
If the network device estimates RI based on prior information to allocate resources, then resource allocation becomes more efficient, but the allocated resource may be insufficient for the actual CSI bit quantity
Solution Approach 1:
The patent makes the CSI reporting process dynamic by allowing the terminal device to adjust reporting content based on actual resource allocation. Instead of relying solely on network estimation, the terminal adapts its reporting to match the allocated resources, ensuring that transmission can succeed with the actual resources provided while maintaining efficient resource utilization.
Solution Approach 2:
The patent introduces feedback mechanisms where the terminal device receives resource allocation information from the network and adjusts its CSI reporting accordingly. This feedback loop allows the system to reconcile the network's resource estimation with the actual resources allocated, ensuring both efficient resource usage and reliable transmission by making the reporting adaptive to actual conditions.
3Measurement precision
If the terminal device reports high-precision CSI with more parameters, then the CSI accuracy improves, but the required uplink channel resource increases
Solution Approach 1:
The patent applies parameter changes by allowing the terminal device to adjust CSI reporting parameters based on available resources. When resources are abundant, the terminal reports high-precision CSI with complete parameters (RI, PMI, CQI). When resources are limited, the terminal reduces reporting precision or excludes certain parameters. This dynamic parameter adjustment resolves the contradiction between CSI accuracy and resource consumption.
Solution Approach 2:
The patent makes the CSI reporting precision dynamic rather than fixed. The terminal device adapts the reporting detail and parameter inclusion based on the allocated resource quantity, enabling the system to achieve optimal balance between measurement precision and resource usage in different scenarios.
4Loss of energy
If the terminal device reduces CSI reporting content to save resources, then uplink channel resource usage decreases, but the CSI transmission performance deteriorates
Solution Approach 1:
The patent uses parameter changes to allow flexible adjustment of CSI reporting content. The terminal device modifies which parameters are reported and their precision levels based on available resources, ensuring that CSI transmission performance is maintained at an acceptable level while optimizing resource consumption. This prevents both resource waste and performance deterioration.
Solution Approach 2:
The patent makes the CSI reporting strategy dynamic by adapting the reporting content to match actual resource allocation. The terminal device dynamically adjusts between high-precision and reduced-precision reporting based on resources available, ensuring optimal balance between resource consumption and transmission performance in different scenarios.
Data Source
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AI summary
This application provides a data transmission method, a terminal device, and a network device. The method includes: determining, by a terminal device, reference information; and sending, by the terminal device, second channel state information CSI based on a comparison result of the reference information and a status parameter, where the second CSI includes all parameters in first CSI or includes some parameters in the first CSI, the first CSI is CSI that needs to be reported and that is configured by a network device for the terminal device, and the status parameter includes at least one of a transmission parameter of uplink data, a parameter in the first CSI, and a transmission parameter of the first CSI. The data transmission method, the terminal device, and the network device in embodiments of this application help improve transmission performance of CSI.