Why full duplex is needed in Telematics?

First of all, what is duplex:

Duplex Separation, abbreviation: duplex. It means that between two communication devices, two-way data transmission is allowed. The communication link between mobile devices occupies two frequencies: the transmission channel from the terminal to the network (uplink), and a channel in the opposite direction (downlink). Duplexing means that two-way transmissions can take place simultaneously, as in the usual case of talking on a telephone. Devices like walkie-talkies are half-duplex or simple duplex. Ethernet can operate in either half-duplex or full-duplex mode. When operating in half-duplex, it is possible to send or receive at any given instant, but not both at the same time. This means: if another device is currently sending data (and you are receiving that data), then you must wait and only send data when that device's transmission has ended. This also means: conflicts are not just possible, but likely. Envision half-duplex Ethernet as a one-way street, and then envision the messages as cars whizzing along that road. If a car is coming toward you and your car is heading toward it, this creates a conflict. This conflict can result in the loss of both cars (or telegrams) at the same time.

Along with the development of Telematics technology, the construction of the national Telematics industry-related standard system will also speed up. Recently, the Ministry of Industry and Information Technology proposed in the Guide to accelerate the development of LTE-V2X-based wireless communication network construction and key technology standard system, and to complete the basic technology research by the end of 2018; to complete the development of a series of 5G-supported Telematics industry standards in 2020, and to further improve and sound information and communication security and data security and other standards.

Car networking as an important application of the Internet of Things in the field of intelligent transportation, this concept was first put forward in 2010 at the first "vehicle network" seminar. So what exactly is Telematics? I believe that the vehicle network is based on the vehicle network, inter-vehicle network and vehicle mobile Internet, in accordance with the agreed communication protocols and data interaction standards, in the car - X (X: car, road, pedestrians and the Internet, etc.), wireless communication and information exchange between the large system network, and is capable of realizing intelligent traffic management, intelligent dynamic information services and intelligent control of the vehicle integration network.

Compared with the traditional automobile operation, Telematics can bring drivers a better user experience and more economical. First of all, Telematics has the function of information service. Vehicle terminals interact with information management platforms and external network servers through the vehicle mobile Internet to obtain information on vehicle location, navigation, vehicle management, insurance, vehicle services, and in-vehicle entertainment, thus providing drivers and passengers with a better driving experience and lower communication costs. Furthermore, Telematics can improve driving safety and efficiency. Through the vehicle network of each sensor node to monitor the vehicle equipment status, and through the inter-vehicle network and vehicle mobile Internet to achieve the vehicle danger warning, which can greatly reduce the occurrence of traffic accidents, as well as improve driving efficiency. Another point is energy saving and emission reduction. The vehicle terminal and in-vehicle sensor nodes can provide economic driving suggestions and power system optimization solutions by monitoring the state of the vehicle equipment and the driving habits of the vehicle owner, thus effectively reducing the cost of fuel consumption and realizing energy saving and emission reduction.

At this stage, there is still a long way to go before Telematics is realized. People want to experience a smart car networking life, but also need traditional car companies, Internet companies and the government to **** with the promotion. Telematics is good, but it is also a double-edged sword. As a mainstream trend in the future evolution of automobiles, Telematics can undoubtedly bring people a more advanced and unique transportation experience, but too much human dependence on intelligence may also lead to the occurrence of lazy behavior, and thus the ability to drive a car declines. If the future is all driverless, city life is likely to be thrown into chaos once the system breaks down.