Vehicle Telemetry Encoding for Real-Time Low-Bandwidth Transmission
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Solution Overview
Problem
Existing flight recorders in aircraft are limited in the types of measurement data they record, often failing to capture the full range of telemetry data available, and transmitting all data is impractical due to bandwidth and cost constraints.
Innovation Solution
A data processing device that processes telemetry data by generating sets of sampled values, deriving data elements representing changes between these values, and encoding them for real-time transmission to a remote unit, using various encoding techniques to reduce data volume while maintaining essential information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all measurement data from sensors is recorded and transmitted, then complete flight data is available for analysis, but bandwidth requirements and transmission costs become prohibitively high
Solution Approach 1:
The patent extracts only the essential and changed information from the complete measurement data set. Instead of transmitting all raw sensor data, the system identifies and transmits only data elements that represent actual changes or deviations from expected values, thereby reducing data volume while preserving critical information for flight analysis.
Solution Approach 2:
The patent transforms the measurement data by changing its representation parameters. Raw continuous sensor readings are converted into discrete data elements that indicate changes, deviations, or anomalies. This parameter transformation reduces the amount of data that needs to be transmitted while maintaining the essential information needed for flight monitoring and analysis.
2Adaptability or versatility
If flight recorder records more types of measurement data, then more comprehensive analysis is possible, but the recorder becomes more complex and harder to locate after accidents
Solution Approach 1:
The patent makes the flight recorder system universal by enabling it to handle multiple types of measurement data from various sensors through a single processing architecture. The system can selectively record different data types based on flight conditions and requirements, providing multi-functionality without proportionally increasing physical complexity or size of the recorder unit.
3Speed
If measurement data is transmitted during flight, then real-time monitoring is enabled, but communication channel capacity limitations prevent transmission of all available data
Solution Approach 1:
The patent extracts only the critical and changed information from the complete telemetry data set for real-time transmission. By identifying and transmitting only data elements that represent actual changes, deviations, or anomalies rather than all raw sensor readings, the system enables real-time monitoring within communication channel capacity constraints while minimizing information loss.
Solution Approach 2:
The patent applies partial action by transmitting only a subset of the available measurement data - specifically, only those data elements that have changed or are critical for real-time monitoring. This partial transmission approach is sufficient for real-time oversight purposes without requiring the excessive bandwidth needed for complete data transmission.
Data Source
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AI summary
A data processing device (101) for processing telemetry data obtains sampled data based on output data from a plurality of sensors (103, 104, 105, 106) associated with a vehicle (102). The data processing device (101) generates first and second sets of sampled values using the sampled data. The first set of sampled values are associated with a first sampling time and the second set of sampled values are associated with a second, subsequent sampling time. The data processing device (101) derives a set of data elements, a data element being indicative of a measure of a change between a sampled value in the first set and a corresponding sampled value in the second set, a position of a given data element in the set of data elements having been determined based on at least one mapping rule. The data processing device (101) encodes the set of data elements and outputs data comprising at least the encoded set of data elements for transmission to a remote data processing unit (113).