Emergency Call Routing by PSAP Authentication Capability
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Solution Overview
Problem
Emergency calls routed to public safety answering points (PSAPs) that cannot process authentication information experience unnecessary delays due to waiting for authentication, prolonging call setup time and impacting emergency response efficiency.
Innovation Solution
Segment emergency calls into two realms: one for authentication-enabled PSAPs and another for non-authentication-enabled PSAPs, using a traffic path identifier to route calls accordingly, allowing non-authentication-enabled PSAPs to skip authentication wait times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emergency calls are routed through authentication procedures before reaching PSAPs, then call authentication reliability is improved, but call setup time increases for PSAPs that cannot process authentication information
Solution Approach 1:
The patent segments emergency call routing into two separate realms: a first realm for PSAPs that can process authentication information and a second realm for PSAPs that cannot. This segmentation allows the system to apply authentication procedures selectively only where needed, eliminating unnecessary authentication delays for PSAPs incapable of processing authentication information while maintaining security for those that can.
2Reliability
If authentication information is added to all emergency calls, then security is improved, but processing efficiency decreases for PSAPs unable to handle authentication information
Solution Approach 1:
The patent applies local quality by making authentication information processing optional and PSAP-specific. Rather than uniformly applying authentication to all emergency calls regardless of PSAP capability, the system adapts the authentication process to the specific capabilities of each PSAP, applying authentication only where it can be processed and utilized.
3Device complexity
If a unified routing approach is used for all emergency calls, then system simplicity is maintained, but call setup time increases due to unnecessary authentication waits
Solution Approach 1:
The patent introduces dynamic routing that adapts based on PSAP authentication capabilities. The system dynamically determines whether to apply authentication procedures by checking if the destination PSAP can process authentication information, thereby optimizing call setup time while maintaining manageable system complexity through capability-based adaptation.
Data Source
AI summary
Systems and methods are provided for reducing delays associated with emergency calls. An emergency NF requests location information associated with an emergency call. The emergency NF receives a modified emergency services routing number (ESRN) comprising a traffic path identifier. Based on the traffic path identifier, an invite message associated with the emergency call is routed to a first realm or a second realm. The first realm may be associated with one or more authentication-enabled PSAPs and the second realm may be associated with one or more non-authentication-enabled PSAPs. At the first realm, a routing NF will wait for an authentication response, and at the second realm, the routing NF will not wait for an authentication response, reducing unnecessary delay of the emergency call.