Uplink Power Control for Full-Duplex Self-Interference Mitigation
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Solution Overview
Problem
The integration of full-duplex technology in wireless communications networks leads to self-interference issues, causing a lower received signal-to-noise ratio and increased signaling overheads due to the simultaneous transmission and reception of signals in the same frequency band, which complicates power control and affects network performance.
Innovation Solution
A method for transmit power control in user equipment that uses different power compensation amounts for subframes based on whether full-duplex technology is applied, ensuring a smooth signal-to-noise ratio and reception performance without significantly increasing signaling overheads by configuring power compensation using cell-level parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate power control parameters are configured for full-duplex subframes, then received signal-to-noise ratio is improved, but signaling overheads are greatly increased
Solution Approach 1:
The patent applies local quality by configuring separate power control parameters specifically for full-duplex subframes rather than uniformly for all subframes. The network device identifies which subframes are full-duplex subframes and configures different power control parameter sets (first power control parameter set and second power control parameter set) for these specific subframes, thereby improving received signal-to-noise ratio only where needed while avoiding unnecessary signaling overhead for half-duplex subframes.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting power control parameters based on the duplex mode of each subframe. The network device configures different power control parameter sets corresponding to different duplex modes (full-duplex vs. half-duplex), allowing the system to adapt parameters such as power compensation amounts to the specific characteristics of each subframe type, thus optimizing signal-to-noise ratio while controlling signaling overhead.
2Loss of information
If same power control is performed on all subframes, then signaling overheads are reduced, but received signal-to-noise ratio is lower than expected due to self-interference
Solution Approach 1:
The patent resolves this contradiction by applying local quality through differentiated power control parameter configuration. Instead of using the same power control parameters for all subframes, the network device identifies full-duplex subframes and configures specific power control parameter sets for these subframes to compensate for self-interference, while using different parameters for half-duplex subframes. This ensures adequate signal-to-noise ratio where needed without incurring unnecessary signaling overhead.
Solution Approach 2:
The patent applies segmentation by dividing subframes into different categories (full-duplex subframes and half-duplex subframes) and applying different power control strategies to each category. The network device segments the power control parameter configuration based on the duplex mode of each subframe, allowing optimized power control for full-duplex subframes while maintaining simpler control for half-duplex subframes, thus balancing signal quality and signaling overhead.
Data Source
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AI summary
The present invention relates to the field of wireless communications, and in particular, to a transmit power control technology in a wireless communications system. In a transmit power control method, user equipment performs transmit power compensation on subframes in different subframe sets by using different power compensation amounts, and sends data in the subframes by using uplink transmit powers on which the transmit power compensation has been performed. According to the solution provided in this application, smoothness of a signal-to-noise ratio of each uplink subframe can be ensured when a full-duplex technology is applied, and reception performance of the uplink subframe can further be ensured without causing excessively large signaling overheads.