At present, car connectivity technology has developed into the 5G era, and its performance has been greatly improved compared with the 4G era. 5G technology has the advantages of high speed, low latency and large connection, which can realize real-time transmission of a large amount of data between vehicles, roads, people and the cloud. The peak rate of 5G can reach 10 Gbps, and the latency can be as low as 1ms, which provides a strong technical support for the development of high-level autonomous driving, intelligent cockpit and other technologies. At present, most of the new energy vehicles and mid-to-high-end fuel vehicles on the market are equipped with car connectivity functions, such as remote control, online navigation, OTA upgrade, and intelligent voice interaction. The core functions of car connectivity technology mainly include four aspects: first, V2V (Vehicle to Vehicle) communication. V2V communication can realize the information interaction between vehicles, such as vehicle speed, position, driving direction, braking status and other information. This can help drivers predict potential risks in advance, such as collision avoidance, and improve driving safety. For example, when a vehicle in front brakes suddenly, it can send a signal to the vehicles behind through V2V communication, so that the drivers behind can take braking measures in time to avoid collision. Second, V2I (Vehicle to Infrastructure) communication. V2I communication can realize the information interaction between vehicles and road infrastructure, such as traffic lights, road signs, toll stations and other information. This can help drivers grasp the real-time traffic information, optimize the driving route, and improve driving efficiency. For example, the vehicle can receive the real-time status of traffic lights through V2I communication, and remind the driver to adjust the speed to pass the intersection smoothly. Third, V2P (Vehicle to Pedestrian) communication. V2P communication can realize the information interaction between vehicles and pedestrians, such as the position and movement direction of pedestrians. This can help drivers find pedestrians in time, especially in blind areas, and improve the safety of pedestrians. Fourth, V2C (Vehicle to Cloud) communication. V2C communication can realize the information interaction between vehicles and the cloud platform, such as vehicle status, driving data, maintenance information and other data. The cloud platform can analyze and process these data, provide users with personalized services, such as remote diagnosis, maintenance reminder, and software upgrade. The application scenarios of car connectivity technology are very wide, covering intelligent driving, intelligent cockpit, vehicle maintenance, car sharing and other fields. In terms of intelligent driving, car connectivity technology can provide real-time traffic information and environmental perception information for autonomous driving vehicles, helping autonomous driving vehicles make more accurate decisions and improve driving safety and efficiency. In terms of intelligent cockpit, car connectivity technology can realize the connection between the vehicle and mobile phones, tablets and other devices, and realize functions such as mobile phone projection, online music, and video playback, providing users with a more comfortable and convenient driving experience. In terms of vehicle maintenance, car connectivity technology can realize remote diagnosis of the vehicle, timely find potential faults of the vehicle, and remind users to carry out maintenance, which can reduce maintenance costs and improve the service life of the vehicle. In terms of car sharing, car connectivity technology can realize remote unlocking, reservation and payment of shared vehicles, improving the efficiency and convenience of car sharing. However, the development of car connectivity technology still faces some challenges. First, the problem of data security and privacy protection. Car connectivity technology involves a large amount of user data and vehicle data, such as driving habits, position information, personal information and other data. If these data are leaked or stolen, it will bring risks to users’ personal safety and property safety. Second, the problem of standardization. At present, there is no unified standard for car connectivity technology in the world, and different automobile manufacturers and technology companies use different technical standards, which affects the interoperability between vehicles and infrastructure. Third, the problem of infrastructure construction. The development of car connectivity technology requires a large number of 5G base stations, intelligent road infrastructure and other supports. At present, the construction of infrastructure in some areas is still not perfect, which limits the popularization and application of car connectivity technology. In the future, the development of car connectivity technology will focus on improving data security, formulating unified standards, and accelerating infrastructure construction. With the continuous progress of technology and the joint efforts of all countries, car connectivity technology will be more mature and widely used, making cars truly become “intelligent mobile spaces” and bringing more changes to people’s travel and life.
