ACARS Message Compression for Character-Oriented Data Links
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Solution Overview
Problem
Existing radio frequency data link systems like ACARS face inefficiencies due to the doubling of message size when converting binary data to character-oriented formats, leading to increased bandwidth usage and costs during transition to higher throughput systems like VDL-2.
Innovation Solution
A method and system that determine the type of data in a file, analyze it, and select an appropriate encoding scheme to losslessly compress data for transmission over a character-oriented data link, using a compression database to map data types to efficient encoding schemes, reducing the number of characters needed for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If binary data is converted to character-oriented format for transmission over ACARS, then compatibility with legacy systems is maintained, but message size doubles leading to increased bandwidth usage
Solution Approach 1:
The patent segments the message transmission process into multiple stages: compression before transmission to reduce size, then expansion after reception to restore original format. This allows the system to maintain compatibility with legacy character-oriented protocols while efficiently reducing the actual message size transmitted over the bandwidth-constrained ACARS link.
Solution Approach 2:
The patent changes the parameter of message representation from standard character-oriented format to a compressed format that uses fewer characters to convey the same information. By transforming the message into a more compact representation before transmission and restoring it after reception, the system reduces bandwidth consumption while maintaining protocol compatibility.
2Quantity of substance
If message size is reduced through compression, then bandwidth usage decreases, but system complexity increases due to compression and expansion operations
Solution Approach 1:
The patent performs compression as a preliminary action before transmission over the ACARS link. By pre-compressing the message into a compact format prior to sending, the system reduces the bandwidth requirements for transmission. The corresponding expansion operation is performed after reception, allowing the complexity to be concentrated at the endpoints rather than during transmission.
Data Source
AI summary
A method of a method of communicating a data file over a radio frequency data link includes steps of determining a type of data represented in the data file; analyzing the data in the data file; selecting an encoding scheme from a plurality of encoding schemes and encoding one or more messages to represent the data file according to the selected encoding scheme. The one or more messages comply with a protocol for a character-oriented data link and the encoding losslessly compresses the data into the one or more messages.