CSI Capability Reporting for Accurate CJT Resource Configuration
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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 align with their capabilities, thereby enabling accurate CSI measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the network device configures measurement resources for CJT based on single-TRP CSI calculation complexity, then the configuration process is simple, but the terminal capability is exceeded and measurement accuracy deteriorates
Solution Approach 1:
The patent changes the parameter basis for resource configuration from single-TRP complexity to multi-TRP CJT complexity. The network device determines measurement resources based on the terminal's reported CJT capability parameters (maximum number of CSI measurement hypotheses, maximum number of reference signal resources per hypothesis, maximum processing capability), ensuring the configuration matches the terminal's actual processing capacity for joint transmission scenarios.
Solution Approach 2:
The patent introduces dynamic capability reporting where the terminal reports its CJT-specific measurement capabilities to the network device. This creates a dynamic adaptation mechanism where the network device adjusts measurement resource configuration based on the terminal's reported capability, rather than using a static single-TRP based configuration approach.
2Measurement precision
If the terminal performs joint CSI measurement on multiple measurement resources for CJT, then measurement accuracy improves, but measurement complexity exceeds terminal capability
Solution Approach 1:
The patent applies preliminary action by having the terminal report its CJT capability parameters to the network device before the network device configures measurement resources. This advance information allows the network device to pre-calculate and configure an appropriate number of measurement resources that match the terminal's processing capability, preventing overwhelming the terminal with excessive measurement complexity.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal reports its CJT measurement capability (maximum number of hypotheses, maximum reference signal resources, processing capability) to the network device. The network device uses this feedback to adjust and optimize the configuration of measurement resources, creating a closed-loop system that balances measurement accuracy with terminal capability.
Data Source
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, or a maximum total quantity of transmit ports on a reference signal resource associated with the one CSI measurement hypothesis. 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.