Temporary Callback Identity Pool for Emergency Call Reliability
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Solution Overview
Problem
There is a lack of effective emergency call provisioning systems that ensure continuous connectivity for emergency calls, particularly in scenarios where calls are dropped or abandoned, leading to a need for a temporary callback system to re-establish connections.
Innovation Solution
A temporary callback system is implemented using a private branch exchange (PBX) with a pool of callback identities that are temporarily assigned to devices making emergency calls, allowing for re-establishment of connections if the call is dropped or abandoned, and are released when cleared by the answering point or upon expiration of a time limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a callback identity is permanently assigned to each device for emergency calls, then emergency call reliability is improved, but system resource consumption and complexity increase
Solution Approach 1:
The patent implements dynamic assignment of callback identities where the pool of available identities fluctuates based on current system state. When emergency calls are active, identities are temporarily allocated; when calls complete, identities return to the pool. This dynamic allocation resolves the contradiction by providing reliability only when needed rather than permanently, reducing overall system complexity.
Solution Approach 2:
The system recycles callback identities by releasing them back to the pool after emergency calls conclude. Instead of permanently assigning identities to devices, the system discards the assignment temporarily and recovers the identity for future use. This resolving the contradiction between ensuring reliable callback capability and minimizing system resource consumption.
2Productivity
If callback identities are temporarily assigned to devices making emergency calls, then resource utilization is improved, but call re-establishment reliability may worsen if identities are released too early
Solution Approach 1:
The system performs preliminary actions by pre-allocating callback identities from the pool before emergency calls are fully established. The identity is reserved and held available during the call setup phase, ensuring that when the call needs to be re-established after being dropped, the identity is already prepared and available, thus maintaining reliability while enabling efficient resource utilization.
Solution Approach 2:
The system implements feedback mechanisms where the PSAP can signal the PBX to retain or release callback identities based on call status. The PBX monitors call establishment progress and provides feedback to the identity management system, adjusting identity retention dynamically. This feedback loop ensures identities are held long enough to enable re-establishment while being released promptly when no longer needed, balancing reliability and resource utilization.
Data Source
AI summary
The present disclosure relates to emergency services and more particularly, to a temporary callback system for emergency calls and methods thereof. In one illustrative embodiment, the system can include a private branch exchange (PBX) or other processing device having a pool of callback identities. When an emergency call is made, a callback identity can be temporarily assigned to the device making the call. The callback identity can provide insurance that the call is maintained. If the call between the device and answering point becomes abandoned or disconnected, the callback identity can be used to re-establish the connection. The callback identity can be released when cleared by the answering point or when a time limit expires. After being released, the callback identity can be made available to other devices that wish to make emergency calls.