Conditional Emergency Call Setup Logic
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Solution Overview
Problem
Mobile devices may inadvertently attempt emergency call setups even when there is no apparent emergency, due to rogue or faulty devices or servers sending misleading messages.
Innovation Solution
Implementing a condition-based emergency call setup function in mobile devices that only initiates an emergency call if specific conditions are met, such as user configuration, message source verification, or service type, to prevent unnecessary emergency call setups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the mobile device automatically attempts emergency call setup upon receiving a 380 response with child element set to emergency, then the emergency call can be established quickly in case of real emergency, but the mobile device may inadvertently establish emergency call when there is no actual emergency due to rogue or faulty devices
Solution Approach 1:
The mobile device performs preliminary actions by checking whether it has previously transmitted an invite request message before automatically attempting emergency call setup. This preliminary verification prevents false alarms by ensuring the device is the legitimate initiator of the communication session, while still allowing quick emergency call setup when the conditions are met.
2Speed
If the mobile device automatically attempts emergency call setup without checking prior invite request transmission, then the emergency call can be established immediately, but the device complexity increases due to need for condition verification
Solution Approach 1:
The mobile device uses feedback from the communication session state to determine whether to proceed with emergency call setup. By checking whether an invite request message was previously transmitted, the device uses feedback about its own communication history to make an informed decision, balancing speed with necessary verification without excessive complexity.
Data Source
Figure 1A
Figure 1B
Figure 2~3
AI summary
A system and method is provided for a communications device to conditionally attempt an emergency call setup. The communications device maintains at least one condition for attempting emergency call setups. Upon receiving a message prompting an emergency call setup, the communications device attempts the emergency call setup only if any of the at least one condition is satisfied. The at least one least condition is defined such that the communications device does not erroneously attempt to establish an emergency call when there is no emergency. The at least one condition might for example include whether the message prompting the emergency call setup indicates a message source that is trusted by the user of the mobile device. A system and method is also provided for a communications network to block at least at least some of the messages from being delivered to their target communications device.