UE Location Refinement for Accurate Emergency Call Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing emergency call routing systems often inaccurately route calls to the wrong public safety answering point (PSAP) due to uncertainties in user equipment (UE) location, leading to delays and inefficiencies.
Innovation Solution
A location engine in the UE generates a location with a horizontal uncertainty and confidence level, comparing it to an uncertainty threshold; if above the threshold, a second location is generated until it meets the threshold or a safeguard timer expires, ensuring accurate communication with the correct PSAP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE uses a single location engine to generate location for emergency calls, then the call routing process is simple and fast, but the location accuracy may be insufficient leading to wrong PSAP routing
Solution Approach 1:
The system dynamically selects between single and multiple location engines based on the uncertainty threshold. When the first location engine's uncertainty exceeds the threshold, the system activates a second location engine to generate an alternative location, thereby adapting the complexity to the actual location quality requirements.
Solution Approach 2:
The system changes the parameter of location uncertainty by comparing it against a threshold and selectively invoking additional location engines based on this parameter evaluation. This parameter-driven approach ensures location accuracy is improved only when necessary, balancing precision with system complexity.
2Measurement precision
If the UE generates multiple locations until the uncertainty threshold is met, then the location accuracy improves, but the time required for emergency call routing increases
Solution Approach 1:
The system performs a preliminary check of the first location's uncertainty against the threshold before committing to additional location generation. This preliminary action prevents unnecessary time consumption by only invoking the second location engine when the first location genuinely fails to meet the accuracy requirement.
Solution Approach 2:
The location engine autonomously evaluates its own output quality by comparing generated locations against the uncertainty threshold and self-corrects by generating additional locations only when needed. This self-service mechanism eliminates the need for external intervention or manual verification, optimizing the balance between accuracy and time.
3Reliability
If the system uses a strict uncertainty threshold for location approval, then the reliability of PSAP routing improves, but the probability of call transfer between PSAPs increases
Solution Approach 1:
The system implements a feedback mechanism where the uncertainty threshold comparison result directly influences the decision to generate additional locations or proceed with routing. This closed-loop feedback ensures that routing reliability is maintained by only approving locations that meet the threshold, while the efficient feedback path minimizes unnecessary rejections and transfers.
Data Source
AI summary
Systems and methods are provided for refining user equipment (UE) location for wireless emergency location-based call routing. When an emergency call is initiated, a location comprising a horizontal uncertainty and a confidence level is generated. The horizontal uncertainty is compared to an uncertainty threshold. If the horizontal uncertainty is equal to or below the uncertainty threshold, the location may be communicated to the gateway and communication between the UE and a public safety answer point (PSAP) is initiated. If the horizontal uncertainty is above the uncertainty threshold, a second location comprising a second horizontal uncertainty and a second confidence level may be generated. In aspects, the location or the second location is generated utilizing one or more of: global navigation satellite system, device-based hybrid, Wi-Fi Location provider, Network-Location provider.