When it comes to wireless communication technology in cars, many people first think of keyless entry (RKE). In fact, this is also one of the earliest wireless technology applications that entered the car. RKE uses 315MHz in the United States and Japan, and the ISM band in Europe. However, with the development of consumer electronics technology, higher-band wireless communication technologies (such as Bluetooth and other mobile phone-related wireless communication technologies) have also begun to knock on the door of automotive electronics. Take Bluetooth, which uses the 2.4GHz band, as an example. It has become a standard configuration for mobile phones. This technology, which has just been born for 10 years, is striding into information and navigation systems.
It is expected that the Bluetooth low energy technology, which will be launched in mid-2009, will also be used in the automotive industry.
Su Guoliang, director of marketing for the Asia Pacific and Japan in the Bluetooth SIG, said that in addition to Bluetooth headsets and Bluetooth hands-free kits that enable drivers to answer calls through voice commands while driving, some systems can also synchronize the phone book with in-car systems, including Caller identity, call waiting, conference call, even signal strength display and cell phone battery display. "The Bluetooth low energy technology, which is expected to be available in mid-2009, will also be used in the automotive industry, such as sensors in the tire pressure monitoring system (TPMS) and remote control door keys (RKE)," Su Guoliang said.
However, ensuring the driving safety of drivers and reducing traffic accidents are the basic principles for ensuring the healthy development of the automobile industry. To ensure this, in addition to improving the performance of the car itself in passive safety and active safety, how to connect the car to the road traffic infrastructure as much as possible, and to ensure driving safety through the interaction between the two has become a reduction in traffic in various countries. A consensus reached on the accident, and this most needed is the vehicle-mounted wireless communication system. Yang Zhengrong, deputy general manager of Renesas Technology (China) 's Automotive Electronics Market Center, said that after using auto active and passive safety technologies to reduce traffic accident mortality by 40%, this interactive system can also help people build on this basis. Reduce the death rate from accidents by another 20%.
So what wireless communication technologies are expected to gain development opportunities in this system? The first thing to mention is DSRC. DSRC has been applied to the non-stop toll collection system (ETC). In the future, it is expected to provide vehicles with relevant road traffic information when the branch lines merge to the main line, intersections, and T-junctions. Currently in Japan, in addition to DSRC, there is an optical Beacon with a communication distance of 3.5m, which provides traffic information in front of the lane specifically for vehicles driving in a lane, and a frequency of 2.5GHz, a maximum communication distance of 70m, and is used for high-speed Beacon of radio waves on highways (available for highway ramps ahead and invisible roads hundreds of meters ahead). In addition, Japan has also begun to explore the possibility of installing DSRC relay stations on both sides of the road and using DSRC communication for vehicle-to-vehicle communication and vehicle-to-vehicle communication.
Hotspot, AdHoc, WAVE (IEEE802.11p) and WiMAX (IEEE802.16e) are also popular technologies for automotive and transportation information and communication. Europe, America and Japan have already taken the lead and have discussed their applications for quite some time. Yang Zhengrong said that these technologies have their own strengths. "AdHoc can establish a communication network in a car fleet at any time and any place; and as the communication technology to be realized in the near future, WAVE and WiMAX have received more attention in Europe and the United States.
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