Full-Duplex Wireless Subband Allocation for Self-Interference Control
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Solution Overview
Problem
In full-duplex wireless communication systems, the uplink and downlink signals interfere with each other, necessitating a method to manage communication operations in areas configured for full-duplex and half-duplex modes effectively.
Innovation Solution
A base station notifies user equipment (UE) of areas configured for full-duplex and half-duplex modes, allowing the UE to perform appropriate communication methods based on received information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If in-band full duplex operation is implemented to double spectral efficiency, then data transmission capacity is improved, but self-interference between uplink and downlink signals increases
Solution Approach 1:
The bandwidth is segmented into multiple subbands, with certain subbands designated as FD (full-duplex) subbands and others as HD (half-duplex) subbands. This segmentation allows the system to exploit full-duplex capabilities in specific frequency regions while avoiding severe self-interference in others, thereby improving overall data transmission capacity without being constrained by interference in the entire bandwidth.
Solution Approach 2:
Different duplex modes (FD and HD) are applied to different subbands based on local interference conditions. The base station identifies and designates specific subbands as FD subbands where self-interference can be effectively managed, while other subbands operate in HD mode. This local differentiation optimizes spectral efficiency in favorable regions while maintaining reliable communication in regions with severe interference.
2Device complexity
If full-duplex operation is supported without subband segmentation, then system complexity is reduced, but communication performance deteriorates due to unmanaged self-interference
Solution Approach 1:
The system segments the bandwidth into FD and HD subbands, introducing controlled complexity through subband identification and designation. The base station maintains a configuration list of FD subbands and notifies UEs of their assignments. This segmentation approach balances complexity and performance by applying full-duplex operation only where interference can be managed, rather than attempting uniform full-duplex operation across the entire system.
Solution Approach 2:
The base station acts as an intermediary that manages the complexity of full-duplex operation. It identifies FD subbands, maintains configuration lists, and notifies UEs of their subband assignments. This centralized management approach handles the complexity at the base station level, allowing UEs to operate in full-duplex mode without each device independently managing the complex interference mitigation requirements.
Data Source
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AI summary
The present disclosure relates to a communication technique for converging an IoT technology with a 5G communication system for supporting a higher data transfer rate beyond the 4G system, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail, security- and safety-related services, etc.) on the basis of 5G communication and IoT-related technologies. The present invention provides an apparatus and a method for supporting a full duplex operation in a wireless communication system.