Avionics LRU Dataload Protocol Testing via Invalid Sequence Injection
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Solution Overview
Problem
Existing tools lack the capability to transmit invalid dataload sequence requests or responses to avionics Line Replaceable Units (LRUs), which is necessary for verifying various functionalities and requirements of the data load software, such as non-delivery, delay, and transmission of invalid protocol files.
Innovation Solution
A method and system for performing dataload protocol operation testing in avionics LRUs, which involves sending a request to initiate the transfer of a dataload sequence, receiving an acceptance status, and determining failure scenarios based on invalid dataload sequence requests, including non-delivery, delay, and transmission of invalid protocol files.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing tools are used for data load operations, then valid data load sequence transmission is supported, but the capability to transmit invalid dataload sequence requests or responses is lacking
Solution Approach 1:
The patent inverts the conventional approach by not only transmitting valid dataload sequences but also intentionally transmitting invalid sequences (such as corrupted protocol files, incomplete sequences, or sequences with errors) to test the target hardware's error handling capabilities. This inversion enables comprehensive verification of software functionalities including error detection, failure scenario identification, and robustness validation.
2Reliability
If comprehensive testing of failure scenarios is implemented, then reliability of data load operations is improved, but existing tools lack the capability to identify non-delivery, delay, and invalid protocol transmission
Solution Approach 1:
The patent implements preliminary action by proactively introducing invalid dataload sequences and failure scenarios during the testing phase before actual deployment. The system pre-configures various failure conditions (non-delivery, delay, corruption) and uses them to test the target hardware's response, thereby identifying potential reliability issues before they manifest in operational use.
Solution Approach 2:
The patent introduces an intermediary testing layer between the data loader and target hardware that actively manipulates the dataload sequence transmission. This intermediary component injects invalid sequences, simulates transmission failures, and monitors the target hardware's response, thereby enabling comprehensive failure scenario identification that existing direct transmission tools cannot provide.
3Ease of operation
If only valid dataload sequences are transmitted, then basic data load functionality is maintained, but verification of error handling and failure scenarios is not possible
Solution Approach 1:
The patent applies dynamics by making the dataload sequence transmission adaptable and variable. Instead of static valid-only transmission, the system dynamically switches between valid and invalid sequences, adjusts transmission parameters (delay, corruption level, completeness), and adapts the testing approach based on the target hardware's response, thereby enabling precise verification of error handling while maintaining ease of operation for basic functions.
Data Source
AI summary
A method for performing dataload protocol operation testing in an avionics Line Replaceable UNIT (LRU) is disclosed. In some embodiments, the method includes sending a request to initiate transfer of a dataload sequence from an external data loader to a target hardware. The method further includes receiving an acceptance status from the target hardware to initiate transfer of the dataload sequence based on at least one of the valid or invalid dataload sequence request or response. The method further includes determining, based on the invalid dataload sequence request or response, occurrence of one or more failure scenarios associated with at least one of: the transmission of the dataload sequence; and the receiving of the acceptance status from the target hardware on different stages of dataload operation.