Aeronautical Data Download via ADS-B Correlation
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Solution Overview
Problem
Current weather radar systems in aircraft are inefficient in sharing weather data across multiple aircraft due to the need to transmit aircraft position information with each data packet, which burdens the limited frequency bandwidth.
Innovation Solution
The method involves creating data sequence structures for received ADS-B messages and aeronautical data packets without position information, correlating them based on receive and packet times to derive aircraft position information, thereby omitting position data from transmission packets and enhancing bandwidth efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If aircraft position information is transmitted with each weather data packet, then the weather data can be accurately associated with aircraft location, but the frequency bandwidth burden increases significantly
Solution Approach 1:
The patent extracts the aircraft position information transmission from each weather data packet and separates it into independent ADS-B position reports. This allows weather data packets to be transmitted without redundant position information, reducing bandwidth consumption while maintaining the ability to associate weather data with aircraft location through time-based correlation of the extracted position reports.
2Measurement precision
If aircraft position is included in every weather data packet, then weather information can be precisely located, but the transmission efficiency decreases due to bandwidth limitations
Solution Approach 1:
The patent makes ADS-B position reports serve multiple functions: they provide aircraft position information for weather data association, enables traffic identification, and supports surveillance operations. This multi-functional approach eliminates the need to include position information in every weather packet, thereby improving transmission efficiency while maintaining position accuracy through the universal position reporting mechanism.
3Adaptability or versatility
If weather data is shared across multiple aircraft, then connected radar functionality is achieved, but the bandwidth requirement increases without position optimization
Solution Approach 1:
The patent performs preliminary action by obtaining and storing aircraft position information through ADS-B position reports before weather data transmission. The ground receiver correlates weather data packets with previously received position reports using time-based matching, allowing weather data to be shared across multiple aircraft without including redundant position information in each packet, thus reducing overall bandwidth usage.
Data Source
AI summary
A method and system for downloading aeronautical data using an automatic dependent surveillance-broadcast (ADS-B) is provided. The method comprises creating a first data sequence structure that includes a receive time for each of one or more received ADS-B messages; creating a second data sequence structure that includes a packet time for each of one or more received aeronautical data packets that are without position information; mapping the received aeronautical data packets respectively to the ADS-B messages by comparing the receive time for each of the received ADS-B messages with the packet time for each of the received aeronautical data packets to produce a correlation between the ADS-B messages and the aeronautical data packets; and deriving position information for each of the received aeronautical data packets from each correlation between an ADS-B message and an aeronautical data packet.