Cars are high-speed moving objects. When improving real-time safety and intelligent traffic management, many programs always focus on the use of long-range communications to obtain coverage of the entire area, but for hundreds of cars that are moving near the area. The real-time information of meters can be difficult to obtain. Such a system is incapable of responding to unexpected traffic conditions. To make up for this deficiency, IEEE 802.11p can be used to its full potential. IEEE 802.11p (also known as WAVE; Wireless Access in the Vehicular Environment). It is essentially an extension of IEEE 802.11 that is compatible with the relevant applications of Intelligent Transportation Systems (ITS). The application level includes data between high-speed vehicles and between vehicles and ITS roadside infrastructure (5.9 GHz band). exchange.

Why not consider 3G or cellular communication technology? "Tested, 3G technology is less responsive than 802.11p, so it is not suitable for such instant messaging applications." Drue Freeman said, "NXP is working with Australia's Cohda Wireless to apply this technology to cars." In fact, the technology has been specifically targeted at automotive applications such as more advanced hotspot switching, better support for mobile environments, enhanced security, and enhanced authentication. The benefits of this technology are expected to reduce deployment costs, increase bandwidth, and collect traffic information in real time.

This communication technology, which NXP calls Car-to-X, can not only realize the vehicle-to-vehicle communication, but also realize the vehicle-to-vehicle communication. For example, when a car traveling into a certain construction site After the signal range, it will receive the signal from the transmitter on the construction site, and the car will automatically prompt the driver to adjust the route according to the direction of travel after receiving the car, Drue Freeman explained. The advantage of this is that you don't need to receive a lot of traffic information that is not related to your route, and after receiving the signal, the car will automatically give you an adjusted route hint.

This technique can also give an indication of the hyper-vision range. For example, if there is a large truck in front of the car, it will completely block your view, and the car in front of the truck will cause great risks if it suddenly brakes. Car-to-X communication technology can also give warnings, which can avoid the occurrence of rear-end tragedies. When passing through an intersection, this technology can also be used to judge cars that are in line of sight blocking dangerous behavior, such as cars passing quickly in a vertical direction and giving an alarm.

Drue Freeman emphasized that the Car-to-X platform meets the requirements of the automotive industry: even in harsh environments, it can reliably receive signals from fast moving objects. This platform combines NXP software radio technology and Cohda wireless advanced IEEE 802.11p. Radio technology convergence. At present, the platform has been tested on the ground in Europe. "We will conduct field tests on hundreds of vehicles next year to test the information processing in complex road conditions." He said, "This platform in Europe is expected to become a standard car, In the future, it may also be extended to the world.” In 2014, this technology will be put into practical use.