Vehicle Emergency Call via Simplex Link With Low Spectral Use
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Solution Overview
Problem
Existing emergency call methods in vehicles face challenges with high spectral resource consumption, particularly when bidirectional links are unavailable, leading to potential communication failures due to insufficient mobile radio network availability.
Innovation Solution
Utilizing a simplex wireless connection, such as satellite communication, to transmit emergency call data without requiring a full-duplex connection, allowing for efficient one-way data transmission using an artificial neural network to facilitate communication between the vehicle and a backend server, supplemented by infotainment system interactions and vehicle sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a full-duplex wireless connection is used for emergency calls, then bidirectional communication capability is improved, but spectral resource consumption increases
Solution Approach 1:
The patent extracts the essential emergency call data (MSD - Minimal Set of Data) from the traditional voice-based full-duplex communication and transmits it separately via a simplex data connection. This separates the critical information transmission from the bidirectional voice channel, allowing emergency calls to function with minimal spectral resources while maintaining the ability to communicate bidirectionally when needed.
Solution Approach 2:
The patent introduces a backend server as an intermediary that receives MSD data from the vehicle via simplex connection, processes it, and then establishes bidirectional voice communication with the control center. This intermediary handles the spectral resource management, allowing the vehicle to use low-resource simplex transmission while still achieving full-duplex emergency call functionality through the server mediation.
2Reliability
If spectral resources are limited at vehicle location, then mobile radio network availability decreases, but the invention enables emergency calls using alternative connections
Solution Approach 1:
The patent makes the emergency call system universal by enabling it to operate through multiple types of wireless connections. The communication unit can use satellite connections, terrestrial mobile networks, or other wireless systems that support simplex data transmission. This multi-functionality ensures emergency calls remain reliable regardless of local spectral resource availability or territorial restrictions on mobile radio networks.
3Use of energy by moving object
If a simplex connection is used for emergency call data transmission, then spectral resource requirement is reduced, but bidirectional communication capability is limited
Solution Approach 1:
The patent segments the emergency call function into two separate communication channels: a simplex data connection for transmitting the Minimal Set of Data (MSD) from vehicle to backend server, and a separate bidirectional voice connection between the backend server and control center. This segmentation allows each channel to be optimized independently - the simplex channel minimizes spectral usage at the vehicle, while the bidirectional voice channel provides full communication capability where resources are available.
Data Source
AI summary
A method for issuing an emergency call, in which a backend server receives emergency call data from a vehicle via a wireless connection provided by a communication unit of the vehicle and sends an emergency call for the vehicle to a control center based on the received emergency call data.