Terminal Power Control via Neighboring Cell Slot Format
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G NR systems, the dynamic change in slot format makes it difficult to predict and manage inter-cell cross interference, especially in determining the uplink power control parameter set for interfering cells, which affects system throughput and user experience.
Innovation Solution
A power control method that involves obtaining slot format information from a neighboring cell to dynamically determine the uplink power control parameter set for a serving cell, reducing interference and improving system efficiency and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slot format dynamically changes in 5G NR to support flexible uplink-downlink configuration, then resource utilization and adaptability are improved, but inter-cell cross interference becomes severe and unpredictable
Solution Approach 1:
The patent applies preliminary action by obtaining slot format information from neighboring cells before determining uplink power control parameters. The terminal device proactively acquires SFI indicating whether neighboring cells will perform uplink or downlink transmissions in upcoming slots, and uses this advance knowledge to pre-adjust its uplink transmit power accordingly. This prevents interference issues rather than reacting to them after they occur.
Solution Approach 2:
The patent implements feedback mechanisms where the network device configures multiple power control parameter sets corresponding to different neighboring cell transmission states, and the terminal device selects the appropriate set based on feedback from SFI. The system continuously monitors neighboring cell slot formats and adjusts power control parameters dynamically, creating a closed-loop feedback system that adapts to changing interference conditions.
2Device complexity
If traditional power control methods are used without considering neighboring cell slot format, then device complexity is reduced, but power control accuracy and interference management deteriorate
Solution Approach 1:
The patent applies segmentation by dividing power control parameter sets into multiple groups, where each set corresponds to a specific neighboring cell transmission state (uplink or downlink). Instead of using a single unified power control mechanism, the system segments parameters based on interference conditions, allowing the terminal device to select the most appropriate parameter set for the current slot format scenario, thereby improving accuracy without requiring complete recalculation of all parameters.
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
This application provides a power control method and a communications apparatus. The method includes: obtaining, by a terminal device, slot format information SFI of a target slot in a non-serving cell; and determining, by the terminal device based on the SFI, a power control parameter set used by the terminal device to send data in the target slot in a serving cell, where the power control parameter set belongs to a set of power control parameter sets configured for the terminal device. According to the power control method provided in this application, when a time domain resource conflict exists between the serving cell and the non-serving cell of the terminal device, the terminal device may determine an uplink power control parameter set of the serving cell of the terminal device by using the obtained SFI that dynamically changes in the non-serving cell. This helps reduce inter-cell cross interference and improve a system throughput, improve a rate for ensuring normal communication of a user, and improve user experience.