Numerology Edge User Placement in 5G Systems
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Solution Overview
Problem
Inter-numerology interference in 5G and beyond cellular communications systems, caused by varying waveform parameters for different users, leads to negative effects on system flexibility and signal quality, with existing studies still in progress to address this issue effectively.
Innovation Solution
A method that optimally places users at the numerology edges in the frequency domain by sorting power levels and calculating a threshold to minimize interference effects, ensuring fair signal-to-interference ratios without additional computational load on base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mixed numerology structures are used to increase system flexibility, then adaptability is improved, but inter-numerology interference increases causing signal quality degradation
Solution Approach 1:
The patent applies local quality by differentiating the treatment of edge users versus inner users in the frequency domain. Edge users, who are most susceptible to inter-numerology interference, receive special attention through optimized resource allocation and power control, while inner users are treated with standard methods. This localized approach addresses the interference problem where it occurs most severely without compromising overall system flexibility.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting power levels and resource allocation for users at numerology edges based on interference conditions. By changing transmission parameters such as power control settings and resource block assignments for edge users, the system mitigates interference effects while preserving the benefits of mixed numerology structures for system adaptability.
2Productivity
If users are placed at numerology edges to maximize resource utilization, then productivity is improved, but interference effects on edge users increase
Solution Approach 1:
The patent applies preliminary action by proactively identifying and protecting edge users before interference becomes severe. The system pre-assigns protected resource blocks and configures power control parameters for edge users in advance, based on their vulnerable positions in the frequency domain. This preliminary protection mechanism allows edge users to be placed in resource-efficient positions while preemptively mitigating the interference they would otherwise experience.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of protected resource blocks and power control adjustments that mediate between the needs for high resource utilization and the need to protect edge users from interference. This intermediary layer allows the system to maintain productive resource allocation while filtering out harmful interference effects through controlled resource assignment and power management.
3Reliability
If power levels are increased to improve signal quality, then signal-to-interference ratio is improved, but interference effects on other users increase
Solution Approach 1:
The patent applies local quality by implementing differentiated power control for edge users versus inner users. Edge users receive enhanced power control adjustments and protected resource allocations to improve their signal-to-interference ratios, while inner users maintain standard power levels. This localized power management approach improves reliability for vulnerable users without generating excessive interference to other users in the system.
Data Source
AI summary
Disclosed is a method which aims to minimize the effects of inter-numerology interference between users that a base station in 5G and beyond cellular communications systems serves with multiple numerology structures by determining the users at the numerology edges optimally.