CPDLC Timed Response Prompting for Pilot Alerting
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Solution Overview
Problem
Avionics datalink systems, such as CPDLC, face issues where messages become stale due to the finite time allocated for responses, leading to pilots losing the ability to respond if they fail to act within the given period.
Innovation Solution
A CPDLC system with a human machine interface and a processing unit that monitors the response period for received messages, displaying a warning when the time remaining is less than a predetermined period, allowing users to take action before the message expires, using a timer and display instructions to alert the user of the remaining response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a finite response period is allocated for CPDLC messages, then system efficiency and communication flow are improved, but pilots lose the ability to respond if they fail to act within the given period
Solution Approach 1:
The system implements feedback by continuously monitoring the response period timer and providing visual warnings to the pilot when the message expiration warning period is reached. This feedback loop allows the pilot to adjust their response timing and avoid losing the ability to respond, thus maintaining response capability while preserving communication efficiency.
Solution Approach 2:
The system performs preliminary action by displaying a warning prompt before the response period expires. This early notification allows the pilot to take corrective action (respond to the message) before the expiration occurs, preventing the loss of response capability while maintaining the finite response period structure.
2Reliability
If a timer warning system is implemented, then pilots are alerted of impending message expiration, but the system complexity increases
Solution Approach 1:
The human-machine interface is designed to serve multiple functions: it displays normal CPDLC message information and simultaneously monitors the response period timer to display warning prompts when needed. This multi-functionality reduces the need for separate dedicated warning devices, thereby limiting the increase in system complexity while maintaining improved response capability.
Data Source
AI summary
Systems and methods for providing an active prompt for a timed response are provided. In one embodiment, a system comprises a human machine interface that presents controller pilot data link communication (CPDLC) information to a user, and a CPDLC computer configured to process received CPDLC messages. In certain embodiments, the CPDLC computer comprises a memory device that stores received CPDLC messages, and a processing unit that starts a timer when a CPDLC message is received, wherein the timer counts a response period for responding to the CPDLC message. Further the processing unit instructs the human machine interface to display a time remaining in the response period when the timer reaches a message expiration warning period.