HAPS Beam Control for Non-Target Area Avoidance
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Solution Overview
Problem
Conventional systems providing wireless communication services using High Altitude Platform Stations (HAPS) often inadvertently irradiate non-target areas, including neighboring countries and areas where service areas overlap, due to the inability to accurately determine and avoid unnecessary radio wave radiation.
Innovation Solution
A system that includes a flying object and an information-providing device, which uses location data, inclination data, and polar coordinate data to calculate a target area and adjust the antenna and radio waves to prevent radiation to non-target areas by receiving location information from a location guide transmission station and physically adjusting the antenna and radio waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the HAPS provides wireless communication service coverage, then the service area is expanded, but radio waves inadvertently irradiate non-target areas including neighboring countries and overlapping service areas
Solution Approach 1:
The system performs preliminary calculations of the target area using location data, inclination data, and polar coordinate data before radiating radio waves. This advance computation allows the HAPS to determine the precise coverage area and adjust its position or antenna orientation to prevent radio waves from reaching non-target areas, thereby eliminating unnecessary radiation while maintaining service coverage.
Solution Approach 2:
The system dynamically adjusts the HAPS position, antenna inclination, and radio wave radiation patterns based on real-time calculations. By continuously monitoring the relationship between the HAPS location, antenna orientation, and calculated target area boundaries, the system can adaptively modify its operation to confine radio waves within the desired service area while avoiding neighboring countries and overlapping regions.
2Productivity
If the HAPS radiates radio waves to provide communication service, then service coverage is achieved, but compliance with service boundaries cannot be ensured
Solution Approach 1:
The system employs a feedback mechanism where the calculated target area information is continuously used to monitor and adjust the HAPS operation. By comparing the actual radio wave coverage with the calculated target area boundaries, the system can detect deviations and make corrective adjustments to maintain compliance with service boundaries while ensuring continuous communication service provision.
Solution Approach 2:
The system calculates the target area and its boundaries in advance before radio wave radiation begins. This preliminary determination of service boundaries provides a reference framework that guides the HAPS operation, ensuring that communication service is provided only within authorized areas and compliance with service boundaries is maintained from the outset.
3Device complexity
If the HAPS operates without precise target area calculation, then system complexity is reduced, but unnecessary radio wave radiation to non-target areas occurs
Solution Approach 1:
The system introduces an information-providing device that acts as an intermediary to perform the complex calculations of target area based on location data, inclination data, and polar coordinate data. This separate computational component provides the HAPS with precise target area information without requiring the HAPS itself to possess complex calculation capabilities, thereby resolving the contradiction between system complexity and radiation control.
Data Source
AI summary
Provided is a system, comprising: an information-providing device; and a flying object functioning as a stratosphere platform and equipped with a control device radiating a beam to form a wireless communication area to provide wireless communication service to a user terminal in the wireless communication area, wherein the information-providing device irradiates the flying object with a radio wave including a response signal to the beam when a frequency of the beam is a predetermined frequency band, and the control device comprises: a radio wave receiving unit receiving the radio wave; a non-target area judging unit judging whether a non-target area of the wireless communication service exists in the wireless communication area based on the response signal; and a flying object controlling unit controlling the flying object not to irradiate the non-target area with the beam in response to the non-target area judging unit judging that the non-target area exists.