Drone Communication Interference Management via Distance Control
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Solution Overview
Problem
Current LTE specifications do not effectively manage communication interference between drones and radio base stations, leading to negative influences on communication quality due to high transmit power settings and good line-of-sight conditions, causing interference with neighboring cells.
Innovation Solution
A flight vehicle management apparatus that specifies and maintains a distance between drones to mitigate interference by identifying interference-prone radio base stations and instructing flight vehicles to maintain specific distances to avoid connecting to these stations, thereby reducing interference and maintaining communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a specified radio communication apparatus (drone) executes control to raise PUSCH transmit power to satisfy high target reception quality, then the reception quality in its own cell is improved, but interference is caused in neighboring cells
Solution Approach 1:
The patent changes the parameter being optimized from reception quality to interference level. The radio base station measures the interference level received from the specified radio communication apparatus and uses this measurement to determine the maximum transmit power, rather than relying on path loss-based calculations that optimize for reception quality. This parameter change directly resolves the contradiction by prioritizing interference reduction over reception quality improvement.
2Reliability
If a specified radio communication apparatus has good line-of-sight with multiple neighboring radio base stations, then the reception power for physical downlink channels is high, but communication is negatively influenced due to interference from other flight vehicles
Solution Approach 1:
The patent implements a feedback mechanism where the radio base station measures the interference level received from the specified radio communication apparatus and feeds this information back to determine the maximum transmit power. This feedback loop allows the system to adapt to the actual interference conditions caused by good line-of-sight properties, dynamically adjusting power limits to prevent negative influences on communication while maintaining the benefits of high reception power.
Data Source
AI summary
The present invention suppresses the case where communication performed by a radio communication apparatus of one flight vehicle is negatively influenced in the case where the radio communication apparatus of the one flight vehicle is connected to a radio base station that is experiencing interference due to a radio communication apparatus of another flight vehicle. A distance specification unit specifies, for each airspace, a distance between a first flight vehicle and a second flight vehicle that has a radio communication apparatus and is located in a cell formed by a radio base station that is experiencing interference due to a radio communication apparatus of the first flight vehicle. An instruction unit instructs, in each airspace, the first flight vehicle and the second flight vehicle to maintain the distance specified for the airspace by the distance specification unit when flying.