CSI Capability Signaling for CJT Measurement Resource Limits
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Solution Overview
Problem
The complexity of CSI measurement in coherent joint transmission (CJT) exceeds the capability of terminals due to mismatched measurement resources configured by the network device, leading to incorrect CSI reporting.
Innovation Solution
A communication method where terminals report their CSI measurement capabilities, including maximum transmit ports and resources, to ensure network devices configure resources that do not exceed their capabilities, thereby enabling accurate CSI measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network device configures measurement resources for CJT without considering terminal capability, then the measurement resources may exceed terminal processing capability, but the network device cannot obtain accurate terminal capability information
Solution Approach 1:
The terminal device reports its CSI measurement capability information to the network device in advance, before the network device configures the measurement resources. This preliminary action enables the network device to obtain accurate terminal capability information and configure measurement resources that match the terminal's processing capability, avoiding resource configuration that exceeds terminal capability.
2Measurement precision
If the terminal performs joint CSI measurement on multiple measurement resources for CJT, then measurement accuracy improves, but measurement complexity increases beyond terminal capability
Solution Approach 1:
The system dynamically adapts the measurement resource configuration to match the terminal's reported capability. The network device configures the quantity of measurement resources based on the terminal's capability information, allowing the terminal to perform joint CSI measurement on multiple resources when capable, while preventing excessive complexity for terminals with limited processing capability.
3Productivity
If the network device configures more measurement resources for better CSI performance, then cell edge throughput improves, but terminal processing load exceeds its capability
Solution Approach 1:
The terminal device provides feedback about its CSI measurement capability to the network device. The network device uses this feedback to configure an appropriate number of measurement resources that balance the need for accurate CSI (for cell edge throughput) with the terminal's processing capability, preventing excessive energy consumption while maintaining performance.
Data Source
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AI summary
This application provides a communication method and a communication apparatus, and relates to the communication field. In the method, a terminal generates first information, and sends the first information. The first information indicates at least one first capability parameter set, the first capability parameter set includes a maximum total quantity of transmit ports in one frequency unit and at least two of a maximum quantity of transmit ports on one resource associated with one CSI measurement hypothesis, a maximum total quantity of resources associated with the one CSI measurement hypothesis, or a maximum total quantity of transmit ports on a reference signal resource associated with the one CSI measurement hypothesis. A network device configures the reference signal resource for the terminal based on the first information. The terminal reports a single CSI measurement capability and/or a CSI measurement capability in one frequency unit, to ensure that the network device performs CSI measurement configuration without exceeding the CSI measurement capabilities of the terminal, thereby ensuring that the terminal can correctly perform CSI measurement.