Flight Vehicle Cell Handover Control During Aerial Base Station Replacement
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Solution Overview
Problem
The challenge of maintaining continuous wireless communication service when replacing flight vehicles that form multi-cells in the sky is addressed, as existing methods cause temporary service interruptions and quality deterioration due to interference and overload during the transition.
Innovation Solution
A control method is implemented to adjust the transmission output of the incoming and outgoing flight vehicles, using algorithms to manage the number of handovers and radio wave output based on user terminal connections and load status, minimizing interference and overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flight vehicle replacement is performed by stopping the outgoing flight vehicle service and starting the incoming flight vehicle service, then replacement maintenance can be completed, but temporary service interruptions and quality deterioration occur due to interference and overload during transition
Solution Approach 1:
The patent applies preliminary action by having the incoming flight vehicle start providing service before the outgoing flight vehicle stops. The control device adjusts transmission output and manages handovers in advance, allowing the incoming vehicle to be ready and gradually take over users, thus avoiding service interruption while completing maintenance replacement
Solution Approach 2:
The patent applies dynamics by dynamically adjusting the transmission output of both outgoing and incoming flight vehicles during the transition period. The control device continuously modifies radio wave output levels and handover rates based on real-time conditions, enabling smooth service continuity while completing the replacement
2Reliability
If transmission output of flight vehicles is adjusted to manage handovers, then interference and overload are reduced, but control complexity increases
Solution Approach 1:
The patent applies feedback by implementing a control device that continuously monitors the number of handovers, transmission output levels, and service conditions. Based on this feedback, the control device automatically adjusts the transmission output of incoming and outgoing flight vehicles to maintain optimal service quality while preventing overload and interference
Solution Approach 2:
The patent introduces a control device as an intermediary between the incoming and outgoing flight vehicles. This mediator manages the complex coordination tasks, including adjusting transmission outputs and controlling handover rates, thereby simplifying the overall system architecture while maintaining service quality
3Productivity
If the number of handovers per unit time is increased to speed up replacement, then replacement efficiency improves, but interference and overload increase
Solution Approach 1:
The patent applies dynamics by making the handover rate adjustable rather than fixed. The control device dynamically controls the number of handovers per unit time based on current system conditions, allowing faster replacement when conditions permit while preventing harmful interference and overload when the system is near capacity
Solution Approach 2:
The patent applies parameter changes by adjusting the transmission output parameter of flight vehicles during handovers. The control device modifies transmission power levels to optimize the balance between replacement speed and interference prevention, enabling controlled acceleration of the replacement process
Data Source
AI summary
Provided is a control device which controls a flight vehicle which forms a multi-cell including a plurality of cells on a ground to provide a wireless communication service to user terminals in the multi-cell, the control device including an output control unit which performs control such that in response to a state where a second flight vehicle which is to replace a first flight vehicle controlled by the control device has started forming a plurality of cells to be aligned with a position of each of the plurality of cells formed by the first flight vehicle, each of the plurality of cells formed by the second flight vehicle being in a same frequency band as that of each of the plurality of cells formed by the first flight vehicle, radio wave output of the plurality of cells of the first flight vehicle continuously falls.