Vehicle Radio Communication Network Selection for Emergency Calls

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Solution Overview

Problem

Existing vehicle emergency call systems face challenges in ensuring successful location registration and call origination to emergency call centers, particularly in situations where network conditions are unfavorable, leading to potential failures in reporting emergencies effectively.

Innovation Solution

A radio communication device with a controller that selects the most favorable network based on prior location registration and call origination results, prioritizing networks for emergency calls to increase the likelihood of successful registration and call completion, even in eCall only mode where normal data communication is not performed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the radio communication device uses a single network for emergency calls, then the device complexity is reduced, but the reliability of location registration and call origination deteriorates under unfavorable network conditions

Engineering Contradiction:

Improvereliability of location registration and call originationVSAvoidnetwork selection and management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The device performs location registration and call origination tests on multiple networks in advance before actual emergency calls. The controller stores test results and uses them to pre-determine the optimal network for emergency communication, ensuring reliable registration and call completion without increasing operational complexity during critical moments

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system incorporates feedback mechanisms where the controller monitors and stores location registration results and call origination results from multiple networks. Based on this feedback, the controller automatically selects the network with the most favorable results for emergency calls, improving reliability while maintaining simple operation through automated decision-making

Inventive Principle:

Principle #23Feedback

2Reliability

If the radio communication device performs location registration and call origination tests on multiple networks, then the reliability of emergency call reporting is improved, but the time required for network selection and registration increases

Engineering Contradiction:

Improvesuccess rate of emergency call reportingVSAvoidtime for network selection and registration

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The device performs location registration and call origination tests on multiple networks during normal operation or in advance, storing the results in memory. When an emergency call is needed, the controller immediately selects the network with the most favorable pre-tested results, eliminating the need for time-consuming real-time testing and ensuring both high reliability and fast response

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system automatically evaluates and selects the optimal network based on stored test results without requiring manual intervention or real-time decision-making during emergencies. The controller autonomously uses historical data to make network selection, reducing both the time required for network selection and the need for complex real-time analysis

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If the radio communication device stores and evaluates location registration results from multiple networks, then the adaptability to different network conditions is improved, but the storage requirements and processing complexity increase

Engineering Contradiction:

Improveadaptability to different network conditionsVSAvoidstorage and processing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The device stores location registration results and call origination results specific to each network in a structured manner, allowing the controller to quickly retrieve and compare only the relevant information needed for network selection. This localized storage approach enables adaptability to different network conditions while minimizing overall storage requirements and processing complexity through efficient data organization

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11503448B2Radio communication equipment and control method thereof

Publication Date: 2022.11.15 KYOCERA CORP

AI summary

A radio communication device installed on a vehicle of this application comprises a radio communicator configured to perform a radio communication with a plurality of networks, a controller configured to perform location registration or a call origination via each of the plurality of networks, and a storage configured to store location registration results or call origination results for each of the plurality of networks. The controller is configured to select a network affording more favorable results than results of one of the plurality of networks based on the location registration results or call origination results stored in the storage, and perform location registration at a time of an emergency call origination by using the selected network.