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Discover the BAT-EMC Ecall application

Discover the BAT-EMC Ecall application

What is the Ecall system?

Since March 31, 2018, all cars sold in the European Union must have eCall capability. This system has been designed to provide quick assistance to drivers in situations of emergency anywhere in Europe.
If an accident takes place, the car sensors detect it and automatically call an emergency service. The passengers can also trigger it manually.
As a communication and data transfer system involved in public safety, it has to be reliable and robust against electromagnetic perturbations.

A vehicle fitted with an eCall system has an embedded SIM card, which automatically makes an eCall in case of a car crash with airbag activation, rollover, or seatbelt blocking. It can also be triggered with a button by the passengers of the vehicle if they are in a situation of emergency.
Not only does the eCall establish a voice connection with a Public Safety Answering Point (PSAP) through a mobile network, but it also sends the “MSD”. There is a bunch of relevant information for the rescue services, such as vehicle coordinates obtained with the car GNSS beacon. As a matter of fact, they can quickly join the accident scene even if the passengers are unconscious and cannot provide information.

Operating principle

A vehicle fitted with an eCall system has an embedded SIM card, which automatically makes an eCall in case of a car crash with airbag activation, rollover, or seatbelt blocking. It can also be triggered with a button by the passengers of the vehicle if they are in a situation of emergency.
Not only does the eCall establish a voice connection with a Public Safety Answering Point (PSAP) through a mobile network, but it also sends the “MSD”. There is a bunch of relevant information for the rescue services, such as vehicle coordinates obtained with the car GNSS beacon. As a matter of fact, they can quickly join the accident scene even if the passengers are unconscious and cannot provide information.

Environment emulation

The test system emulates a real environment composed of a mobile network and a satellite positioning system. It runs an emergency scenario and collects the MSD information from the car.
The system has a mobile network emulator (GSM, LTE, or any other network), a signal generator that produces satellite signals (GPS, Galileo, Beidou, or GLONASS), and software that plays the role of the PSAP and decodes the MSD.

BAT-EMC's solution

As a communication system, eCall must comply with EMC standards and this is where Nexio steps in ! BAT-EMC software integrates hardware test setups to synchronize eCalls with classical EMC immunity tests and identify faulty behaviours.

The software can be installed anywhere on the computer, as it is communicating with BAT-EMC using a local TCP server on port 25. Moreover, in order to be able to use the software with “Keysight” system, the “Keysight eCall package” must be installed first.

At the end of the immunity test with BAT-EMC, an ecall file is automatically stored in BAT-EMC result folder containing all parameters, options and MSD data of the eCall software.
Moreover, when an immunity test is visualized later on, the ecall software will automatically start up and open the corresponding ecall file to give access to all MSD data.
As this ecall file belongs to BAT-EMC test results, it will included in the project at test publication.
Furthermore, an eCall file can be opened by double-clicking it, or using the “Open” button of “ECall.Standalone.exe”.

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