ACK/NACK Priority Feedback for Wireless Interference Management
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Solution Overview
Problem
Current 5G NR technology and other multi-access wireless communication systems face challenges in managing interference between device pairs with different link priorities during simultaneous transmissions, leading to potential data loss and interference issues.
Innovation Solution
The method involves transmitting data in a first device to a second device while receiving ACK/NACK signals with priority information from other device pairs, allowing the first device to determine whether to yield transmission in subsequent slots based on the priority information, thereby mitigating interference by adjusting its transmission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple device pairs transmit simultaneously in wireless communication systems, then system productivity and resource utilization are improved, but interference between transmissions increases leading to data loss
Solution Approach 1:
The patent implements a feedback mechanism where receiving devices monitor feedback signals (ACK/NACK) from other device pairs and use this information to adjust their transmission behavior. Specifically, when a device receives a NACK signal indicating poor channel conditions or interference in another link, it proactively adjusts its own transmission parameters or yields transmission opportunities, thereby preventing interference before it occurs and maintaining both high productivity and reliability
Solution Approach 2:
The patent enables devices to take preliminary actions by monitoring feedback signals from other links before initiating their own transmissions. By detecting ACK/NACK signals in advance, devices can predict potential interference scenarios and adjust their transmission schedules or parameters proactively, preventing interference from occurring in the first place while maintaining efficient resource utilization
2Ease of operation
If devices transmit without considering other links, then ease of operation is improved, but interference detection and management become difficult
Solution Approach 1:
The patent implements a self-service mechanism where each device independently monitors feedback signals from other device pairs and autonomously makes transmission decisions based on this information. The receiving device extracts priority information from feedback signals and automatically adjusts its own transmission behavior without requiring complex centralized coordination, thereby maintaining ease of operation while effectively detecting and managing interference through distributed self-monitoring
3Reliability
If priority-based transmission yielding is implemented, then reliability of high priority links is improved, but device complexity increases due to feedback monitoring and decision-making
Solution Approach 1:
The patent applies local quality by implementing priority-based yielding specifically at the receiving device where feedback signals are monitored and interpreted. The receiving device extracts priority information from feedback signals and makes localized transmission decisions based on this information, while transmitting devices maintain simpler operation. This localized implementation of complexity ensures high priority link reliability without requiring all devices to be equally complex
Data Source
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AI summary
Various features and aspects related to methods and apparatus for interference detection, mitigation and/or avoidance using feedback signaling are described. In accordance with one aspect, a first device may transmit data to a second device in a first transmission slot. The first device may receive feedback from a third device including priority information corresponding to a link between the third device and a fourth device. The first device may determine whether to yield transmission of additional data to the second device during at least a second transmission slot based on the priority information.