UAS C2 Spectrum Allocation Under Control Station RF Interference
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Solution Overview
Problem
The finite nature of the unmanned aircraft system (UAS) aviation safety radio frequency (RF) spectrum poses a challenge for safe beyond visual line of sight (BVLOS) operations, as traditional spectrum planning must account for worst-case RF interference scenarios, limiting UAS density and operational efficiency.
Innovation Solution
The implementation of a UAS control apparatus that includes antenna elements mounted on a control station, capable of dynamically allocating and managing command and control (C2) channels to establish and maintain connections with UAS, while adjusting the control spectrum in response to potential interference from encroaching UAS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spectrum planning is used to account for worst-case RF interference scenarios, then RF interference is minimized, but UAS density and operational efficiency are limited
Solution Approach 1:
The patent implements dynamic spectrum allocation where the control station continuously monitors RF interference conditions and adjusts spectrum assignments in real-time. When a UAS encroaches on the geofenced volume, the system dynamically reassigns C2 channels to avoid interference rather than using static worst-case planning. This allows the system to adapt spectrum usage based on actual conditions, increasing UAS density while maintaining reliability.
Solution Approach 2:
The system changes spectrum parameters dynamically by reassigning C2 channels when interference conditions arise. Instead of fixed spectrum planning, the control station modifies frequency assignments, channel allocations, and spectrum usage parameters in response to real-time UAS positions and interference measurements, enabling higher UAS density without compromising RF interference mitigation.
2Reliability
If geofenced volume is established to prevent RF interference, then spectrum reliability is improved, but operational flexibility and UAS access to control station are reduced
Solution Approach 1:
The geofenced volume is implemented dynamically rather than as a static restriction. When a UAS encroaches on the geofenced volume, the control station detects the encroachment and dynamically reassigns C2 channels to maintain spectrum reliability. This allows UAS to operate flexibly within the coverage volume while the system adapts to maintain reliability when needed.
Solution Approach 2:
The control station acts as an intermediary that mediates between UAS operational flexibility and spectrum reliability. Rather than imposing rigid geofence restrictions, the control station monitors UAS positions and intervenes only when necessary by reassigning C2 channels, thus maintaining both operational flexibility and spectrum reliability.
3Reliability
If C2 channels are allocated to maintain safe operations, then UAS control reliability is improved, but spectrum availability for additional UAS is reduced
Solution Approach 1:
The system changes C2 channel parameters dynamically based on actual interference conditions rather than allocating fixed spectrum resources for every possible scenario. When no encroachment occurs, full spectrum availability is maintained. When encroachment is detected, the system reassigns C2 channels to specific frequency ranges that avoid interference, maintaining control reliability while preserving spectrum availability for other UAS.
Solution Approach 2:
Instead of allocating spectrum resources for all potential worst-case scenarios, the system applies partial action by activating interference mitigation measures only when actually needed. C2 channels are reassigned to avoid interference only when UAS encroachment is detected, rather than pre-allocating protected spectrum for all possible scenarios, thus maintaining reliability while maximizing spectrum availability.
Data Source
AI summary
An unmanned aircraft system (UAS) control apparatus is disclosed. In embodiments, the UAS control apparatus is embodied in a control station to manage command and control (C2) functions for UAS operations in a designated coverage volume including a geofenced interference region proximate to the control station, controlling each UAS via connections on a spectrum of C2 channels. The UAS control apparatus generates flight plans for UAS operations, providing separation and keeping UAS operations away from the control station to minimize RF interference with other UAS C2 connections. Should a UAS be required to operate proximate to the control station, the UAS control apparatus employs dynamic spectrum management with respect to other concurrently operating UAS to eliminate, reduce, or mitigate RF interference resulting from the encroaching UAS.