The "Chinese solution" for Internet of Vehicles has gradually become the international mainstream, and engineering academicians recommend the early deployment of V2X chips

The C-V2X technical standard proposed by China based on 5G technology has gradually become the mainstream technical route for the international Internet of Vehicles. Chinese companies need to actively deploy and gain competitive advantages. At the 2022 World Internet of Things Wuxi Summit, which opened on November 26, Wei Yiyin, academician of the Chinese Academy of Engineering and deputy general manager of China Aerospace Science and Industry Corporation, put forward this view.

V2X, which is the exchange of information between vehicles and the outside world, enables communication between vehicles and vehicles and base stations, etc., thereby obtaining traffic information such as real-time traffic conditions, road information, pedestrian information, etc., thereby improving driving safety, reducing congestion, and improving traffic efficiency. , providing in-car entertainment information, etc.

Previously, the technology standard for Internet of Vehicles has always been DSRC technology, which stands for Dedicated short range communication. In 2014, the United States proposed a DSRC technology route based on 802.11p (similar to WiFi), which was later adopted by Europe and Japan, and also launched related connected car plans, forming NXP (NXP) and ST (STMicroelectronics) , Renesas, car companies and other traditional automotive electronics industry chains.

However, during the adoption process, the industry found that the advantages of this standard are high transmission rate, short delay, and support for point-to-point and point-to-multipoint communications. The disadvantages are limited expansion performance, small transmission range, and unguaranteed user service quality. Future technology evolution route unclear. As a result, the industry hopes to redesign the technical standards for Internet of Vehicles, and C-V2X technology came into being. During the development process, many car companies and chip developers believe that C-V2X technology is better than DSRC technology and easier to achieve commercial deployment.

From the perspective of specific performance indicators, the DSRC standard is characterized by supporting vehicle speeds of 200km/h, maximum data transmission rate of 27Mbps, effective communication distance of 240 meters, delay of less than or equal to 20ms, mature technology, complete standards, poor signal penetration, limiting transmission The effective range is limited, the network capacity is limited, and roadside facilities require heavy investment.

C-V2X (CellularVehicle-to-Everything) supports vehicle speeds of 500km/h, peak uplink rates of 500Mbps, downlink 1Gbps, effective communication distance of 450m, and latency of less than or equal to 50ms. Importantly, the C-V2X technology route based on LTE-R14 technology and supported by the two major technologies of LTE-VD and LTE-V-Cell is the only V2X technology with a clear 5G evolution path and backward/forward compatible.

Compared with DSRC technology, which requires the establishment of dedicated WiFi base stations, C-V2X can use existing 5G base stations and has lower hardware costs. Therefore, it is more advanced than DSRC in terms of coverage, sensing distance, number of connections, and short delay. In terms of data packet transmission rate, the reliability level increases by 15%-25%, the network can accommodate greater traffic density, and the investment in network deployment and maintenance is low.

According to the test report of 5GAA (5G Automotive Alliance), C-V2X products have significantly better communication range and reliability than DSRC while meeting security requirements. The United States has announced in 2020 that it will abandon DSRC technology and turn to C-V2X, which is mainly promoted by China.

Wei Yiyin believes that the "vehicle-road-cloud integration" C-V2X autonomous driving solution proposed by China, which is supported by the road end, transportation facility end and cloud platform, has a clear evolution path and can smoothly transition to 5G. It is an important step in building a "vehicle-road-cloud integration". "The key technology of the system. At the same time, China is the world leader in 5G technology, and the development of V2X technology based on cellular networks has become the key to breakthroughs in the transformation of China's automobile industry.

Wei Yiyin pointed out that in recent years, my country has led more and more Internet of Things standards. China directly accounts for about 60% of the international Internet of Things standards and technical reports under development. In the development of the Internet of Things, China's scientific and technological strength and industrial strength are basically in a dominant position.

In his view, V2X is still in the verification stage. As V2X infrastructure construction expands to all-area transportation, it is expected that by 2024, V2X functions will be applied on a large scale and the system will enter the mass production stage. It is recommended that car companies deploy V2X chips as soon as possible. , and actively participated in the formulation of V2X standards to gain layout advantages.

Currently, models equipped with V2X chips include AIONV, MarvelR,  Hongqi E-HS9  (  parameters  |  inquiry  ), etc. The development trend of V2X chips is high performance, low power consumption, safe and reliable. Car companies should standardize technical requirements and test specifications for specific scenarios based on the vehicle functions implemented by V2X.

Wei Yiyin said that as the construction of national-level Internet of Vehicles pilot zones in China accelerates, the scope of open road testing continues to expand, and the types of virtual simulation tests and closed R&D tests continue to enrich. Some areas have achieved pre-commercial use of V2X, focusing on smart logistics, wireless Explore the application scenarios of smart logistics vehicle-road collaboration in Renggang District and other aspects.

Currently, the Jiangsu (Wuxi) Internet of Vehicles Pilot Zone has completed the intelligent transformation of more than 400 square kilometers and 800 point segments, and has deployed more than 200 sets of road network facilities such as roadside communication units, millimeter wave radars, and edge computing equipment. Demonstration projects are already being implemented.

As the core area of ​​Wuxi's Internet of Vehicles pilot area, Xishan has invested a total of 300 million yuan since 2020 to implement the first and second phases of the Internet of Vehicles demonstration project, achieving full coverage of 45 square kilometers in the Xidong New City business district and completing two-way 295.4 kilometers of intelligent network-connected roads and 255 points have been renovated, and five categories of roadside intelligent facilities and equipment have been deployed on a large scale.

In Chongqing Liangjiang New Area, more than 100 kilometers of demonstration roads, L-VISTA automobile integration test zone, Airport Industrial Park smart logistics 5G autonomous driving project, Lijia Smart Park, Liangjiang Collaborative Innovation Zone and other pilot demonstrations have been built.

The Hunan (Changsha) Internet of Vehicles Pilot Zone has completed the construction of more than 100 kilometers of smart highways, more than 100 square kilometers of urban intelligent network open test roads, and more than 1,000 acres of closed test fields, and opened smart transportation routes.

At this forum, Li Keqiang, academician of the Chinese Academy of Engineering, pointed out that currently, China’s standard intelligent connected vehicle technology innovation, industrial ecology, infrastructure, regulations and standards, product supervision and network security systems have been basically formed. It has significant advantages in market driving, information and communication, and infrastructure construction, and is expected to explore a development path for the "China Plan" for intelligent connected vehicles that leads the world.