Terminal Device Capability Reporting for CSI Configuration
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Solution Overview
Problem
In MIMO technology, terminal devices face challenges in accurately reporting channel state information (CSI) due to inappropriate configuration of parameters by the network device, leading to insufficient processing capability and affected system performance.
Innovation Solution
A method where the terminal device generates and sends first indication information to the network device, indicating frequency domain parameters and associated capability parameters such as port quantity, spatial domain parameter, reference signal resource quantity, and total port quantity, allowing the network device to configure CSI measurement parameters within the terminal's capability range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the network device configures CSI measurement parameters without considering terminal capability, then the configuration process is simple, but the terminal device cannot process the parameters and CSI reporting fails
Solution Approach 1:
The terminal device performs capability indication before the network device configures CSI measurement parameters. The network device receives the capability information and uses it to determine appropriate configuration parameters that match the terminal's processing capabilities, ensuring successful CSI reporting while maintaining configuration simplicity.
2Reliability
If the network device configures parameters within terminal capability range, then CSI reporting succeeds, but the network device needs to perform additional capability assessment
Solution Approach 1:
The terminal device automatically performs capability assessment and reports its processing capabilities to the network device. This self-service approach allows the network device to configure parameters within the terminal's capability range without requiring complex external assessment mechanisms, ensuring reliable CSI reporting while keeping the network device processing relatively simple.
3Measurement precision
If the terminal device performs large amount of calculation for CSI, then measurement precision improves, but processing capability requirements increase
Solution Approach 1:
The terminal device reports its calculation capability parameters to the network device. Based on these parameters, the network device adjusts the CSI measurement configuration parameters (such as frequency domain parameters, port quantity, spatial domain parameters) to match the terminal's processing capabilities. This ensures the terminal can perform accurate CSI calculations without exceeding its processing limits.
Data Source
AI summary
This application provides a method for reporting a terminal device capability and a communications apparatus. The method includes: The terminal device generates first indication information and sends the first indication information to a network device. The first indication information is used to indicate one or more frequency domain parameters and one or more of the following capability parameters associated with each frequency domain parameter: a port quantity, a spatial domain parameter, a reference signal resource quantity, and a total port quantity. The frequency domain parameter is used to indicate a maximum quantity of frequency domain units that can be supported by the terminal device. The frequency domain unit is a frequency domain unit based on which the terminal device feeds back a PMI. Each capability parameter group may be used to indicate one combination of a plurality of parameters that can be supported by the terminal device.