我的文（My writing）.doc

我的文（My writing） Vehicle information system is a concept in recent years, it is the use of computer, satellite positioning, communication and control technology of automobile electronic equipment to provide safety, comfort and environmental protection functions and services, it is part of the intelligent car, also called car electronic devices. Vehicle information system includes automobile computer, intelligent navigator, driving recorder, vehicle multimedia and so on. With the development of new technologies, automobiles will no longer be isolated units, but become active network nodes. Vehicle information system can form an independent network in the vehicle, and it is also a node of the world network, so it can provide many corresponding services. From the computer field, the vehicle information system is a mobile computing platform (automotive computing platform), which is proposed by the Ministry of information industry. From the point of view of service objects, the vehicle information service system covers the harmony and unity of people, vehicles and society. Vehicle information system is divided into 4 levels, from high to low, followed by customer layer, service layer, communication layer and vehicle layer. The service layer pays attention to the unity of people, society and vehicles. It provides these three services to the end users. The service layer provides a service layer solution, the operators face different user needs all kinds of automotive products and data service network are combined to provide a unique and personalized service to users. Communication layer is the combination of vehicle and service, and wireless editing will provide more changes for vehicle communication. Vehicle layer is the so-called vehicle navigation, vehicle monitoring terminal, it is divided into two kinds: one has communication function; the other one does not have, including vehicle monitoring and gradually autonomous navigation in china. In the future, vehicle monitori