UE Geolocation Transmission to PSAP for Emergency Calls
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Solution Overview
Problem
Existing emergency service systems face challenges in quickly and accurately determining the location of a wireless caller, often resulting in delays and inaccurate location data, which can hinder prompt emergency response.
Innovation Solution
The system enables user equipment (UE) to directly transmit its geolocation to the public-safety answering point (PSAP) once a connection is established, bypassing the need for the cellular network to provide approximate locations, thereby improving location accuracy and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the cellular network determines and transmits approximate location of the wireless device, then location information is provided to the dispatcher, but the location accuracy is poor and the process causes long delays
Solution Approach 1:
Instead of the PSAP requesting location data from the cellular network (traditional approach), the UE proactively transmits its own location data directly to the PSAP. This inversion of the information flow eliminates the intermediary network processing step, achieving both higher accuracy (using UE's own GPS/location services) and faster delivery (no network request-response delay).
Solution Approach 2:
The location determination function is extracted from the cellular network and placed directly in the UE. The UE uses its own location capabilities (GPS, Wi-Fi positioning, cell tower triangulation) to determine its position independently, then transmits this data directly to the PSAP, bypassing the network's approximate location determination process entirely.
2Loss of information
If the PSAP manually transmits a digital request to the cellular network seeking location, then location data can be obtained, but the process is complex and results in long delays
Solution Approach 1:
The UE determines and prepares its location data in advance, before the PSAP even places the emergency call. The location information is ready and waiting to be transmitted as soon as the call is established, eliminating the need for any subsequent request-response interaction. This preliminary preparation of location data simplifies the overall process and ensures immediate availability.
Solution Approach 2:
The UE performs self-service by autonomously determining its own location and voluntarily transmitting it to the PSAP without requiring any action from the network side. The UE takes responsibility for both location determination and data transmission, freeing the cellular network from the complex task of location calculation and request handling.
3Reliability
If the cellular network processes location requests and transmits approximate locations, then some location data is provided, but network resources are consumed and efficiency is reduced
Solution Approach 1:
The location determination workload is extracted from the cellular network and transferred to the UE. The network no longer needs to process location requests, calculate approximate positions, or manage location databases, thereby freeing up processing resources, memory, and bandwidth for other critical functions while maintaining reliable location data provision through the UE's direct transmission.
Data Source
AI summary
A user equipment (UE) receives a command to place a wireless voice call to an emergency service and, in response, initiates the wireless voice call to the emergency service at an emergency phone number. The UE detects that a connection is established between the UE and a PSAP, wherein the PSAP is responsible for dispatching emergency services. The UE determines a geolocation of the UE and transmits the determined geolocation to the PSAP.