As technology and driver demand continue to evolve, wireless communication technology will increasingly increase its voice in the future automotive electronics market. The driving force for development includes not only the automotiveization of consumer electronics, but also the pursuit of a more environmentally friendly, safer and more convenient driving environment. The former includes technologies such as Bluetooth, GPS and mobile wireless communication that we are familiar with, while the latter is in the process of cultivating and forming the market and standards. Under the efforts of the electronics industry and the automotive industry, DSRC, ETS, WAVE, ITS, etc. are emerging. A variety of new technology and new concepts related to automotive and road transport infrastructure are working to clear some of the obstacles that still exist on this road.
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More than just keyless entry
When it comes to wireless communication technology in cars, many people first think of keyless entry (RKE). In fact, this is one of the first wireless technology applications to enter the car. RKE uses 315MHz in the US 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-related wireless communication technologies) have begun to slam the door of automotive electronics. Taking Bluetooth in the 2.4GHz band as an example, it has become a standard configuration for mobile phones. The technology that has just been born 10th anniversary is making great strides into information and navigation systems.
Su Guoliang: Low-energy Bluetooth technology, which is expected to be launched in mid-2009, will also be used in the automotive industry.
Su Guoliang, Director of Asia Pacific and Japan Marketing, Bluetooth Technology Alliance, said that in addition to Bluetooth headsets and Bluetooth hands-free kits that allow drivers to make calls by voice commands while driving, some systems can also synchronize the phonebook with the in-vehicle system, including Caller identity, call waiting, conference call, even signal strength display and mobile phone battery display. “The low-energy Bluetooth technology, which is expected to be available in mid-2009, will also be used in the automotive industry, such as sensors in tire pressure monitoring systems (TPMS) and remote door key (RKE) applications,†said Su Guoliang.
However, ensuring the driver's driving safety and reducing traffic accidents are the basic tenets to ensure 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 and the road traffic infrastructure as much as possible, and ensure the driving safety through the interaction between the two has become a reduction in traffic in various countries. A consensus reached on the accident, and what is most needed is the in-vehicle wireless communication system. Yang Wei, deputy general manager of Renesas Technology (China) Automotive Electronics Market Center, said that after using car primary and passive safety technology to reduce traffic accident mortality by 40%, this interactive system can also help people on this basis. The accident mortality rate will be reduced by another 20%.
So which wireless communication technologies are expected to gain development opportunities in this system? The first thing to mention is DSRC. The DSRC has been applied to the toll collection system (ETC), and it is expected to provide traffic information for the roads when the feeders meet at the main line, intersections, and T-junctions. At present, in Japan, in addition to the DSRC, there is a light beacon with a communication distance of 3.5 m, which is designed to provide traffic information in front of the lane for vehicles traveling in a certain lane, and a frequency of 2.5 GHz and a maximum communication distance of 70 m for high speed. The electric wave Beacon of the road (providing the front highway ramp and the invisible road hundreds of meters ahead). In addition, Japan has begun to explore the possibility of setting DSRC relay stations on both sides of the road to use DSRC communication for vehicle-to-vehicle communication and inter-vehicle communication.
Hotspot, AdHoc, WAVE (IEEE802.11p) and WiMAX (IEEE802.16e) are also popular technologies for automobile and traffic information communication. Countries such as Europe, America and Japan have already made their debut, and their applications have been discussed for quite some time. Yang Wei said that these technologies have their own strengths. “AdHoc can establish a communication network in the vehicle group at any time and any place. As a communication technology to be realized in the near future, WAVE and WiMAX have received more attention in Europe and America.â€
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