Reference Signal Reconfiguration for Accurate Downlink Link Evaluation
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Solution Overview
Problem
Current communication systems face inaccuracies in downlink radio link quality evaluation due to dynamic antenna shutdown, where terminal devices cannot adapt to changes in reference signal configurations, leading to incorrect power adjustments and evaluation results.
Innovation Solution
The terminal device receives first indication information to determine a deviation value for the reference signal, adjusting receive power or predefined evaluation parameters to accurately evaluate radio link quality, reducing signaling overheads by only receiving configuration information for different reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dynamic antenna shutdown is implemented to reduce energy consumption, then energy saving is achieved, but downlink radio link quality evaluation accuracy deteriorates
Solution Approach 1:
The network device performs preliminary actions by notifying the terminal device of reference signal configuration changes before actual transmission. The terminal device uses this advance information to correctly adjust its evaluation parameters, ensuring accurate radio link quality assessment even when antenna configurations change dynamically.
Solution Approach 2:
The system implements feedback mechanisms where the network device informs the terminal device about configuration changes through indication information. This feedback loop enables the terminal device to adapt its receive power adjustment and evaluation parameter selection based on current antenna shutdown states, maintaining evaluation accuracy.
2Loss of energy
If reference signal configuration changes after dynamic antenna shutdown, then energy saving is achieved, but terminal device cannot learn changes in real time leading to incorrect evaluation
Solution Approach 1:
The network device provides indication information to the terminal device in advance, enabling the terminal to learn configuration changes before they take effect. This preliminary information transfer ensures the terminal device can adapt its evaluation process without losing critical configuration update information.
Solution Approach 2:
Indication information serves as an intermediary carrier that conveys configuration change information from the network device to the terminal device. This intermediary mechanism ensures reliable information transfer about reference signal configurations without requiring continuous full configuration messaging.
3Quantity of substance
If semi-static reference signal configuration is used, then signaling overhead is reduced, but terminal device cannot adapt to dynamic changes
Solution Approach 1:
The network device sends indication information in advance to notify the terminal device of configuration changes. This preliminary notification allows the terminal to adapt to dynamic changes without requiring continuous full configuration updates, maintaining low signaling overhead while improving adaptability.
Solution Approach 2:
The system transitions from purely semi-static configuration to a dynamic configuration mechanism where indication information enables real-time adaptation. The terminal device can dynamically adjust its receive power and evaluation parameters based on received indication information, achieving adaptability while maintaining efficient signaling.
Data Source
AI summary
This application provides a communication method and apparatus. After a quantity of antenna links of a network device changes, a configuration of a reference signal sent by the network device may also change. In this application, the network device may indicate, to a terminal device by using indication information, a new configuration of the reference signal after the quantity of antenna links changes, so that the terminal device can evaluate downlink radio link quality based on the new configuration. For example, the terminal device determines a first deviation value based on the configuration, and corrects a predefined evaluation parameter or a receive power of a first reference signal based on the first deviation value. In this way, an accurate downlink radio link quality evaluation result is obtained.