Emergency Call Location Codes for Accurate PSAP Routing
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Solution Overview
Problem
Current emergency response systems face inefficiencies due to inaccurate location estimation and delayed communication of emergency details, leading to misrouting of calls and prolonged response times.
Innovation Solution
Implementing unique location and service codes that are input during emergency calls, allowing for precise location and service information to be transmitted directly to PSAPs, enabling rapid and accurate routing of emergency services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless network infrastructure or GPS is used to determine location, then location information can be obtained, but the location accuracy is insufficient leading to misrouting
Solution Approach 1:
The location information is segmented into multiple hierarchical levels: approximate location from network/GPS data, and precise location from unique codes. This segmentation allows the system to use different precision levels for different routing stages, improving overall routing accuracy while maintaining system efficiency.
Solution Approach 2:
Unique location codes act as an intermediary between the user device and the PSAP routing system. These codes provide a direct, unambiguous link to the correct PSAP, eliminating the imprecision of network-based location estimation and ensuring accurate call routing.
2Productivity
If approximate location is used for routing, then call can be routed to PSAP, but response time is prolonged due to additional location verification
Solution Approach 1:
The unique location code is provided to the PSAP in advance as part of the call setup information. This preliminary provision of accurate location data eliminates the need for time-consuming location verification and dispatch coordination, enabling immediate routing to the correct PSAP and accelerating the overall emergency response.
3Device complexity
If detailed location information is not provided upfront, then call setup is simpler, but misrouting occurs requiring call transfers
Solution Approach 1:
The unique code serves multiple functions simultaneously: it identifies the precise location, determines the appropriate PSAP, and provides dispatch information. This multi-functionality enables accurate routing without increasing call setup complexity, as the single code replaces multiple information exchange steps.
4Measurement precision
If unique codes are implemented for precise location, then routing accuracy improves, but system complexity increases
Solution Approach 1:
The system uses existing user input mechanisms (keypad or touchscreen) to capture unique codes, leveraging familiar device functionality. This self-service approach allows the device to provide precise location information without requiring additional specialized hardware or complex system modifications, thereby improving location precision without proportionally increasing system complexity.
Data Source
AI summary
In the various embodiments, systems and methods are disclosed for providing unique service and location codes from a user of a mobile device to a Public Safety Answering Point (PSAP) operator at the beginning of an emergency call. In some embodiments, the unique location codes can be utilized in routing the of the emergency call to the appropriate PSAP. In the embodiments, the unique codes can be received as part of an SIP INVITE message including a modified P-Access-Network-Info (PANI) header forwarded from a Proxy-Call Session Control Function (P-CSCF) to an Emergency Call Session Control Function (E-CSCF).