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ECall is a project of the European Commission for the improvement of transportation safety by providing rapid assistance to motorists involved in a collision anywhere in the European Union. In the event of a collision, the intended solution employs an in-band modem that transmits vehicle location, airbag deployment, and other relevant information timely and reliably from the In-Vehicle System (IVS) over the cellular network voice channel to the Public Safety Answering Point (PSAP). This paper describes the requirements, system design and performance of the eCall in-band modem solution that was selected by 3GPP.
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