Automated GNSS Performance Tests For ERA-Glonass Modules

By Rohde & Schwarz

Effective January 1, 2017, all newly registered cars, trucks and buses in Russia and the Eurasian Customs Union must be equipped with the ERA-Glonass automatic emergency call system. In an emergency, an in-vehicle module transmits vehicle position data and other information via a cellular link. A new option for the R&S®SMBV100A vector signal generator now delivers standard-compliant, fully automated tests of the GNSS receiver integrated in the module.

 

In recent years, both the Russian Federation and the European Union have launched initiatives to introduce automatic in-vehicle emergency call systems with the goal of significantly reducing response times to serious traffic accidents. In an emergency, the system automatically places a call to the near-est public safety answering point (PSAP). Users can also make emergency calls manually. In both cases, the system transmits a standardized minimum set of data (MSD) including informa-tion such as the number of passengers and time and place of the accident and establishes a voice connection to the PSAP. In addition to Russia’s ERA-Glonass, a European equiva-lent emergency call system referred to as eCall will soon be available. The two systems are based on the same architec-ture, have the same core functionalities, and are harmonized and interoperable (Fig. 1). ERA-Glonass, however, does offer additional functions such as SMS transmission of MSDs in case that no data or voice connection can be established with a PSAP.

System architecture

Fig. 1: Architecture of an automated in-vehicle emergency call system. Both ERA-Glonass and eCall are based on this setup.

Certification of ERA-Glonass modules
The in-vehicle system (IVS) is made up of various components including a GNSS receiver to determine the time and place of an accident, a modem with an antenna to send an emergency call, microphones and loudspeakers for voice communications and a push button for manually activating emergency calls. Before an IVS can be used, it must undergo a certification process encompassing diverse standardized tests. The test specifications applicable for ERA-Glonass modules are laid down in the GOST R standards issued by the Federal Technical Regulation and Metrology Agency in Moscow. The tests specified in these standards fall into two main categories, which will be discussed in the following…

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