Inert-Alert ADS-B Transceiver for UAS Spectrum Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing Automated Dependent Surveillance-Broadcast (ADS-B) system faces limitations in effectively integrating unmanned aircraft systems (UAS) into controlled airspace, particularly at low altitudes, due to spectrum congestion and co-channel interference, which can impact air-to-air performance and safety.
Innovation Solution
An intelligent non-disruptive 'inert/alert' system for UAS that uses onboard positioning and altimeter data to assess conditions, shifting from a default 'inert' mode to an 'alert' mode for reduced transmission power and frequency only when necessary, to mitigate interference and ensure safety, employing satellite-based navigation, transceivers, and data storage for environment and traffic awareness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UAS continuously broadcast position information at standard power levels, then safety and visibility in controlled airspace is improved, but spectrum congestion and co-channel interference increases
Solution Approach 1:
The system implements periodic action by transitioning between inert and alert modes, where ADS-B transmissions are suspended during inert mode and activated only when alert conditions are detected. This periodic transmission pattern reduces spectrum congestion while maintaining safety through selective broadcasting based on operational conditions.
Solution Approach 2:
The system applies dynamics by making transmission power and frequency adjustable based on operational context. The transceiver dynamically switches between inert mode (reduced or no transmission) and alert mode (active transmission at standard power levels), allowing the system to adapt transmission characteristics to current safety requirements and spectral conditions.
2Object-generated harmful factors
If UAS transmit at reduced power and frequency, then spectrum congestion is reduced, but safety and visibility to other aircraft deteriorates
Solution Approach 1:
The system implements feedback by continuously monitoring operational conditions and using this information to determine when to activate alert mode. When safety-critical conditions are detected (such as proximity to manned aircraft or entry into controlled airspace), the system receives feedback to switch from inert to alert mode, ensuring transmission power is sufficient for safety while minimizing unnecessary broadcasting during low-risk periods.
Solution Approach 2:
The system applies preliminary anti-action by proactively switching to alert mode with full transmission power when safety risks are anticipated or detected, preventing potential safety issues before they occur. This ensures that when safety becomes critical, the UAS is already broadcasting at appropriate power levels to maintain visibility to other aircraft.
3Use of energy by moving object
If UAS operate in inert mode by default, then energy consumption and spectrum usage is reduced, but ability to provide real-time position information deteriorates
Solution Approach 1:
The system uses periodic action by operating in inert mode (low energy consumption, no transmission) during normal conditions and switching to alert mode (full transmission) when safety requires position information. This periodic activation balances energy conservation with information availability, transmitting only when necessary for safety or regulatory compliance.
Solution Approach 2:
The system applies parameter changes by dynamically adjusting transmission power and frequency based on operational mode. During inert mode, transmission parameters are minimized or suspended to reduce energy consumption. When alert conditions arise, transmission parameters are changed to standard power levels and frequencies, ensuring position information is broadcast with sufficient strength and frequency for safety.
Data Source
AI summary
A system for intelligent non-disruptive airspace integration of unmanned aircraft systems (UAS) is disclosed. The system includes an onboard positioning system and altimeter that determine a current position and altitude of the UAS. Under normal conditions, the UAS remains in inert mode: a transceiver listens for and decodes transmissions from nearby aircraft and ground-based traffic and control facilities. If certain conditions are met (e.g., proximate aircraft, altitude ceilings, controlled or restricted airspaces) the system may declare an alert mode. When in alert mode, the transceiver broadcasts position and identifier information of the UAS to alert neighboring aircraft to its presence. Intelligent transmission strategies regulate the power level or rate of alert-mode transmissions to reduce spectrum congestion due to high UAS density. Alert-mode transmissions continue until the underlying conditions change and inert mode is resumed.