Base Station Mode Selection for Wireless Interference
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Solution Overview
Problem
Full duplex radio communication systems face significant interference issues, particularly intra-device self-interference, UE-to-UE inter-link interference, and BS-to-BS inter-link interference, which degrade system performance and make efficient management challenging.
Innovation Solution
A method and apparatus for a base station to select between half duplex (HD) and full duplex (FD) modes based on signal-to-noise ratio (SNR) and signal-to-interference-plus-noise ratio (SINR) values, calculating a channel capacity ratio to determine the optimal mode and switch between them to maximize network throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full duplex (FD) mode is used to enable simultaneous transmission and reception, then network throughput is improved, but interference (self-interference and inter-UE interference) increases
Solution Approach 1:
The patent implements dynamic mode selection between half-duplex and full-duplex operations based on real-time channel conditions. The base station calculates channel capacity ratios for both modes using measured SNR and SINR values, then selects the mode that maximizes network throughput. This dynamic adaptation allows the system to exploit FD mode's throughput benefits when interference is manageable while falling back to HD mode when interference becomes prohibitive.
Solution Approach 2:
The patent changes the operational parameter (duplex mode) based on measured channel conditions. By monitoring SNR and SINR values and calculating channel capacity ratios, the system adjusts the duplex mode parameter to optimize performance. This parameter change enables the system to transition between HD and FD modes according to varying interference conditions.
2Productivity
If full duplex (FD) mode is used to improve communication efficiency, then resource utilization is improved, but system complexity increases due to interference management
Solution Approach 1:
The patent implements a feedback mechanism where UEs report measured SINR values to the base station, which then calculates channel capacity ratios and determines the optimal duplex mode. This feedback loop enables the system to manage interference complexity through centralized decision-making at the base station, using real-time channel quality information to guide mode selection without requiring complex distributed interference coordination.
Solution Approach 2:
The base station acts as an intermediary that centralizes the interference management function. Rather than requiring each UE to independently manage interference, the base station collects SINR measurements from UEs, calculates channel capacity ratios, and makes the mode selection decision. This intermediary approach simplifies the overall system complexity by consolidating the decision-making function.
3Productivity
If dynamic mode switching between HD and FD is implemented to maximize throughput, then network performance is improved, but signaling overhead increases
Solution Approach 1:
The patent implements partial mode switching rather than continuous switching. The base station calculates channel capacity ratios for both HD and FD modes and switches modes only when the calculated ratio indicates a significant performance benefit. This partial action approach avoids unnecessary mode transitions and associated signaling overhead while still capturing the performance benefits when dynamic switching is warranted.
Data Source
AI summary
A method for selecting, by a base station, HD mode or FD mode in a wireless communication system supporting an FDR scheme may comprise: a step of receiving, from a second terminal which receives interference from a first terminal, a value related to the signal to noise ratio (SNR) of the second terminal and a value related to the signal-to-interference-plus-noise ratio (SINR) of the second terminal; a step of measuring the SNR value and the SINR value of the base station; a step of calculating the channel capacity ratio between the HD mode and the FD mode by using the received value related to the SNR of the second terminal, the received value related to the SINR of the second terminal, the measured SNR value of the base station, and the measured SINR value of the base station; and a step of selecting either mode on the basis of the calculated channel capacity ratio between the HD mode and the FD mode.