HAPS Feeder Link Switching Using Opposite Circular Polarization
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Solution Overview
Problem
Existing HAPS systems face challenges in maintaining uninterrupted wireless communication services during fuselage replacements, leading to potential communication capacity drops due to the need to divide bandwidth and manage different polarized waves, which can cause interference and loss.
Innovation Solution
The system employs circularly polarized waves with different polarization directions for active and spare aircraft, allowing simultaneous connection to the ground communication device without bandwidth division, using polarization correction and buffer accumulation to ensure uninterrupted switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bandwidth is divided and different polarized waves are used for active and spare HAPS, then simultaneous connection is enabled, but communication capacity drops and interference occurs
Solution Approach 1:
The patent transitions from dividing bandwidth (frequency domain) to utilizing spatial polarization dimensions. By assigning different polarization directions (horizontal/vertical or left/right circular polarization) to active and spare HAPS, the system enables simultaneous connections without frequency division, thereby maintaining full communication capacity while ensuring service continuity during fuselage replacement.
2Object-affected harmful factors
If bandwidth division is implemented for fuselage replacement, then interference is reduced, but communication capacity is lost
Solution Approach 1:
The patent changes the parameter from frequency (bandwidth) to polarization direction. Instead of allocating different frequency bands to active and spare HAPS, the system uses the same frequency band but applies different polarization directions, thereby eliminating communication capacity loss while still preventing interference through polarization orthogonality.
3Ease of repair
If fuselage replacement is performed, then maintenance is enabled, but instantaneous interruptions occur
Solution Approach 1:
The patent implements preliminary action by establishing the feeder link with the spare HAPS using a different polarization direction before the active HAPS is replaced. This allows the spare HAPS to be pre-positioned and connected, ensuring that no communication interruption occurs when the active fuselage is replaced, as the spare is already ready to take over immediately.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach prevents instantaneous interruptions and maintains communication capacity during fuselage replacements by enabling simultaneous connection and polarization correction, reducing losses and ensuring seamless service continuity.
Implementation Method 1
a ground communication device 200 according to at least one of a right-handed circularly polarized wave 310 and a left-handed circularly polarized wave 320
Data Source
AI summary
Provided is a system including: a first flying object and a second flying object each configured to be capable of establishing a wireless communication link with a ground communication device arranged on ground, in which, when replacing the first flying object which has established a wireless communication link with the ground communication device using a first circularly polarized wave with the second flying object, the first flying object cuts the wireless communication link with the ground communication device after the second flying object has established a wireless communication link with the ground communication device using a second circularly polarized wave opposite to the first circularly polarized wave.