The R-Car W2R delivers top-class performance when using Renesas’ exclusive radio frequency (RF) system design technology. It is the first device of this type capable of reducing out-of-band transmit emissions to less than −65 decibel-milliwatts (dBm), achieving the requirements of the European standards organization European Telecommunications Standards Institute (ETSI).

Transmitting high-quality signals with very little interference makes it possible to incorporate V2X into various types of Advanced Driving Assistance System (ADAS) applications, such as forward collision warning and lane keep assistance. The R-Car W2R also conforms to the IEEE 802.11p communication standard for Intelligent Transport Systems (ITS) used in Europe and North America.

Previous safe driving assistance systems relied on technologies such as camera images, infrared signals, and milli-wave radar. However, there are tradeoffs with these, such as the inability to track traffic conditions over wide areas and difficulty obtaining information on vehicles approaching intersections where visibility is poor.

V2X aims to reduce vehicular accidents and traffic congestion by enabling direct, bi-directional communication between vehicles (V2V) and between vehicles and signal devices or road signs (V2I), without the need to route data through the cloud. V2X communication standards are being adopted in various countries, and a number of companies, including Renesas, are accelerating development work in this area with the expectation that V2X will become an important technology for drivers in the years ahead.

Europe and North America have already adopted the IEEE 802.11p 5.9 GHz band wireless communication standard, which enables vehicles to obtain information on approaching vehicles outside line of sight and over a wide area. The R-Car W2R complies with this standard and enables the reliable collection of information on vehicles and infrastructures over a wide area to enable high-quality signal transmission.

When combined with existing products based on the R-Car platform, it enables bi-directional V2V and V2I communication of information that cannot be picked up using camera images or radio waves. This allows ADAS systems development for enhanced safety and comfort, making it possible to alert the driver with accurate, real-time information.

Features:

－ Exclusive RF system design technology that reduces out-of-band transmit emission to less than the −65 dBm level for the first time ever

－ IEEE 802.11p compliance and single-chip integration of communication functions from RF to the physical layer and the data link layer

－ V2X ecosystem helps system manufacturers reduce development time and costs