intelligent roadside station (C2X) (IRS)
Intelligent Roadside Stations (IRS) are smart radio beacons placed at the side of the road to exchange information and communicate between motor vehicles as in car-to-car communication( C2C) or car-to-roadside communication( C2R).
IRS stations, similar to Roadside Units( RSU), are directly connected to each other, to the motor vehicle infrastructure and, via mobile networks, to the central traffic management system. They operate according to the Open Traffic System( OTS) with uniform interfaces and transmit in the 5 GHz range.