IBFD Communication Device Scheduling for QoS-Specific Interference
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Solution Overview
Problem
In 5G networks, the in-band full-duplex communication (IBFD) faces challenges in managing inter-link interference due to varying quality of service (QoS) requirements, which hinders efficient frequency utilization when different communication use cases with different QoS demands are mixed, such as eMBB and URLLC.
Innovation Solution
A communication device with a control unit measures channel quality for each level of QoS, allowing precise scheduling and pairing of terminal devices to optimize IBFD operations, thereby reducing interference and improving frequency utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If in-band full-duplex communication is performed to improve frequency utilization efficiency, then frequency utilization efficiency is improved, but inter-link interference increases
Solution Approach 1:
The patent applies local quality by differentiating interference management strategies based on QoS levels. The system measures and manages interference separately for different QoS requirements (e.g., eMBB vs. URLLC), allowing optimized pairing and scheduling decisions that account for the specific interference characteristics of each service type. This enables the system to tolerate higher interference for QoS-tolerant services while protecting QoS-critical services.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting interference management parameters based on measured channel quality and QoS requirements. The system changes pairing decisions, scheduling allocations, and interference cancellation parameters according to the specific interference conditions and QoS levels detected in the communication environment, enabling adaptive optimization of the trade-off between frequency utilization and interference management.
2Device complexity
If conventional IBFD is applied without QoS consideration, then implementation complexity is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent segments the IBFD implementation by separating interference management into QoS-specific processes. Instead of a monolithic interference management system, the patent divides the approach into distinct QoS level measurements, separate pairing decisions for different service types, and differentiated interference handling strategies. This segmentation maintains manageable complexity while significantly improving reliability through QoS-aware decision making.
3Productivity
If IBFD is performed with mixed QoS requirements, then frequency utilization efficiency improves, but interference management difficulty increases
Solution Approach 1:
The patent implements dynamics by creating a flexible, adaptive interference management system that responds to real-time channel quality measurements and QoS requirements. The system dynamically adjusts pairing decisions, scheduling allocations, and interference cancellation parameters based on current network conditions and service requirements. This dynamic approach enables efficient frequency utilization across mixed QoS traffic while managing interference complexity through continuous adaptation rather than rigid predetermined rules.
Data Source
AI summary
A communication device (200A) includes a communication unit (21) and a control unit (25). The communication unit (21) performs wireless communication with a first communication device (100) that supports in-band full-duplex (IBFD) communication that transmits and receives wireless signals using at least a part of resources of the same frequency and the same time. The control unit (25) measures channel quality with a first communication device (100) at each level of quality of service requested for the wireless communication with the first communication device (100) on the basis of interference from a second communication device (200B) that performs wireless communication with the first communication device (100).