IEEE 802.11p(also known as WAVE,Wireless Access in the vehicular environment) is a communication protocol extended by the IEEE 802.11 standard. This protocol is mainly used in the wireless communication of vehicle electronics. It is set up to extend the extension from the IEEE 802.11来 to meet the relevant applications of the Intelligent Transport System (Intelligent transportation systems,its). Application levels include data exchange between high-speed vehicles and the standard its roadside infrastructure for vehicles and 5.9 GHz (5.85-5.925 GHz) bands. The IEEE 1609 standard is a high-level standard based on the IEEE 802.11p Communication protocol. 
The 802.11p will be used in telematics (or dedicated short range communications,dsrc) systems, which is a US Department of Transportation (U.S. Department of Transportation) is based on the European Communication Network for vehicles, in particular the electronic road toll system, vehicle safety services and the commercial trading system on the vehicle and so on the design of the long-distance continue to spread the air interface (continuous air Interfaces-long and Medium Range,calm) system plan. The ultimate vision of the program is to create a nationwide network that allows communication between vehicles and roadside radios or other vehicles. This work is based on its leading ASTM E2213-03 program.
802.11P-----Wireless LAN standard for intelligent traffic its has been promulgated by IEEE in July 2010.
The 802.11p will be used in telematics (or dedicated short range communications,dsrc) systems, which is a US Department of Transportation (U.S. Department of transportation) continues to spread the air interface (Continuousair) on medium and long distances, based on European communications networks for vehicles, in particular electronic road pricing systems, vehicle safety services, and commercial trading systems on vehicles. Interfaces-long and Medium Range,calm) system plan. The ultimate vision of the program is to create a nationwide network that allows communication between vehicles and roadside radios or other vehicles. This work is based on the ASTM E2213-03 program.
The IEEE 802.11p extends the traditional wireless short-distance network technology to enable very useful features for automobiles, including: more advanced switching mechanisms (handoff scheme), mobile operations, enhanced security, identification (identification), peer Peer-to-peer) certification. The most important thing is to communicate on a car-defined frequency. will act as the basis for DSRC (dedicated short-range communication) or for in-vehicle communications. In-vehicle communications can take place between cars, or between cars and roadside infrastructure networks. Technically, there are many improvements to a particular environment such as cars, such as more advanced hotspot switching, better support for mobile environments, enhanced security, enhanced identity authentication, etc. to achieve true business, interoperability between different vendors is essential, so it is critical that standards are first adopted in the IEEE, Now it seems that this is not a difficult thing. The car communications market is largely dominated by mobile phone communications, but objectively speaking, the cellular coverage costs are relatively high and the bandwidth provided is relatively limited. The use of 802.11p is expected to reduce deployment costs, increase bandwidth, real-time collection of traffic information, and support for identity authentication is expected to replace the RFID technology. These advantages help to stimulate manufacturers to put Wi-Fi in particular into the car, and to save costs and convenience, manufacturers will most likely to work with the traditional a/b/g in the same frequency band, or integration of these standards of multimode products. It is also possible for automotive manufacturers using IEEE to gain access to in-vehicle communications.
IEEE 802.11p (wave,wireless Access in the vehicular environment)