Ground-to-Air RF Spectrum Allocation for Continuous Flight Links
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Solution Overview
Problem
Ensuring continuous and uninterrupted air-to-ground communications for airborne assets is challenging due to increasing air traffic and interference from multiple ground base stations and noise sources, complicating the allocation of RF spectrum channels.
Innovation Solution
A spectrum management system dynamically allocates RF spectrum slots based on flight plans, considering interference predictions and coverage, and employs beam steering technology to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If RF spectrum channels are allocated to multiple airborne assets in increasing air traffic, then the quantity of airborne assets supported increases, but interference between communications and reliability of communication links deteriorates
Solution Approach 1:
The RF spectrum is segmented into multiple narrowband channels, allowing simultaneous allocation to different airborne assets. The spectrum management system divides the available spectrum resource into discrete frequency slots, enabling multiple users to communicate without interference by assigning them to different segments of the spectrum.
Solution Approach 2:
The system dynamically allocates and reassigns RF spectrum channels based on real-time flight plans, airborne asset positions, and interference conditions. The spectrum management continuously monitors the communication environment and adjusts channel assignments to maintain reliable links as assets move through different geographic areas and base station coverage zones.
2Area of stationary object
If airborne assets transit across large geographic areas using multiple ground base stations, then coverage area increases, but network interference and complexity of spectrum management worsen
Solution Approach 1:
The spectrum management system performs multiple functions through a single centralized platform: it manages flight plan submissions, calculates link budgets, predicts interference, allocates spectrum channels, and coordinates handovers between base stations. This multi-functional approach simplifies the overall system architecture compared to having separate specialized systems for each function.
Solution Approach 2:
The spectrum management system acts as an intermediary between airborne assets and ground base stations, coordinating spectrum allocation and managing handovers. It receives flight plan information from operators, processes interference predictions, and determines optimal channel assignments, thereby mediating the complex interactions between multiple assets and base stations.
3Reliability
If deterministic spectrum allocation is implemented for flight plans, then reliability of communications improves, but complexity of spectrum management system increases
Solution Approach 1:
The system performs preliminary spectrum allocation based on submitted flight plans before airborne assets begin their flights. By calculating link budgets and predicting interference conditions in advance using the flight plan information (route, timing, altitude), the system can pre-assign appropriate RF channels, ensuring reliable communications from the start of each flight without requiring complex real-time adjustments.
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
Provides stable and continuous communications channels by optimizing RF spectrum allocation and interference management, ensuring reliable air-to-ground communication links.
Implementation Method 1
employs beam steering technology to mitigate interference
Data Source
AI summary
Disclosed herein is a terrestrial to air communications network that can be configured to include a spectrum management system that deterministically allocates spectrum to aircraft for use during flight. In one or more examples, a user transmits a flight plan to a spectrum management system that is configured to manage the RF spectrum in a given air space. In one or more examples, and based on the received flight plan, the spectrum management system can allocate an RF spectrum frequency “slot” (i.e., timeslot, subchannel, or resource block) for the aircraft to use during its intended flight. The spectrum management system can take into account available spectrum as well as the predicted network traffic and their spectrum allocations to determine an RF spectrum slot that can provide a stable and continuous communications channel to the aircraft during its flight.