With the support of national policies, with the development of intelligent and electric vehicle technology, a new era of electric vehicles and intelligent vehicles has arrived. The rapid development of intelligent electric vehicles has put forward higher requirements for the "on-board network", including: higher bandwidth, faster transmission rate, smaller outer diameter, higher flexibility, better cost-efficiency and so on.
Image’s Source : China Auto Newspaper, October 26,2021
These requirements seem to be a big problem for the rapid development of intelligent electric vehicles, fortunately, we have "intelligent human brain". When the traditional bus cable can not meet the needs of the development of the vehicle network, human beings invented the "vehicle single pair Ethernet (cable)". So, why is our Vehicle Ethernet more in line with the development needs of today's intelligent electric vehicles? Why do our automobile need to embrace single-pair Ethernet technology?
First of all, most traditional automobile’s serial bus cables cannot meet the needs of intelligent electric vehicle data transmission today.
In March 2020, China's Ministry of Industry and Information Technology issued <Automation Classifications of Car Driving> which stipulates that L1-L2 (automobile driving’s automation classifications level) level system can take over a small number of, discontinuous vehicle control tasks, belong to the high level of Advanced Driving Assistance System(referred to as "ADAS" or "auxiliary driving") (that is to say: secondary automatic driving system can liberate drivers’ hands in a short time); The L3-L5 level system can perform continuous driving tasks under certain circumstances after activation, which belongs to the scope of autonomous driving.
Photo source: Autohome Carhome
Secondary autonomous driving systems may require five RADAR sensors and five cameras, while fully autonomous driving systems (levels 4 and 5) will require up to 20 RADAR sensors and six cameras as well as V2X communication. In short, as the level of the autonomous driving system changes, the total amount of data transmission will increase with the number of independent sensors.
In addition, Intel had previously predicted that a connected self-driving car would generate 4 TB of data for every eight running hours (mainly due to the hundreds of on-board sensors that self-driving automobile will have.) The transmission, storage and sharing of these data require high throughput, high transmission rate, high immunity, low immunity, less wiring, low latency, safe and reliable network —— In-car single pair Ethernet can just meet these requirements.
Photo souce: Personal Library, <The Incredible Numbers: How much data can the Internet generate every day?>
Most of serial bus cables of the conventional vehicle fail to reach a 70 MB/s data transmission rate. In order to realize automated driving, it is necessary to integrate various sensing technologies and wireless communication technologies (including far-range, medium-range and short-range radar, laser radar, cameras, ultrasonic sensors and GPS, etc.) in the car, with the network structure compatible with different transmission rates and communication protocols. With the simultaneous use of LIDAR, RADAR, camera, and V2X communication, the vehicle network needs to transmit too much data which is more than the existing capacity of a conventional car serial bus. Therefore, the automotive industry needs the addition of "on-board single-to-Ethernet" to make access to autonomous driving and advanced ADAS systems a reality.
Compared with the traditional Ethernet, the on-board single pair of Ethernet has its unique advantages. In automotive automation systems, the traditional (classical) Ethernet requires two pairs of wires to achieve data transmission rate of 100 Mbps, or four pairs of CAT 5e wires to achieve a 1 Gbps transmission rate (operating frequency of 100 MHz; each pair can send and receive data). A single pair of Ethernet can achieve a data transmission rate of at least 100 Mbps with only a pair of single wires.
At present, Zhaolong can provide on-board single-pair of Ethernet cables, including LongCar® on-board SPE 100M, LongCar® SPE 100M (no sheath), LongCar® SPE 1G, LongCar® SPE 5G / 10G / 25G and other automotive data communication cables, which can be applied to vehicle ethernet, automotive ADAS and infotainment systems, etc.
Automotive Data Communication Cable’s Application System
Zhaolong’s mainstream products of the LongCar® vehicle coaxial cable: RG 174, RTK031, RTK044 which can support 6G transmission rate and can be perfectly suitable for the Fakra connector and applied in the car audio, video, communication signal transmission.
At present, Zhaolong’s LongCar® on-board SPE cable products cover 100 Mbps, 1 Gbps, 5 Gbps, 10 Gbps and 25 Gbps transmission rate. Zhaolong’s LongCar® on-board SPE cable products which mainly can be applied to the car Ethernet interface connected to ECU, equipment, switches and accessories is capable of meeting the TC 9 tests of Open Alliance Alliance.
In addition, Zhaolong's HSD products are high-speed data transmission cables used in the automotive industry. Zhaolong's HSD cable which can be applied to in-car infotainment systems adopts four-star stranded structure design, aluminum foil and tin copper shielding to ensure excellent EMC performance.
Zhaolong Vehicle Single Pair of Ethernet Cable has the following advantages:
Has passed the IATF 16949 automotive special cable system certification;
With the capacity of meeting the TC 9 tests of the Open Alliance alliance;
High throughput, high EMC immunity, high speed, low latency, safety and reliability, with the capacity of achieving data transmission rate of at least 100 Mbps;
Small cable outer diameter, flexible and light. Only "a pair of twisted pair" can realize two "missions" of Ethernet data transmission and terminal power supply (PoDL), reducing car wiring.
About Zhaolong Interconnect and Zhaolong’s Vehicle Data Communication Cable
Zhaolong Interconnect, founded in 1993, is a high-tech enterprise which is specialized in the manufacture, design and sales of data cables, dedicated cables and connection products. Since our foundation, Zhaolong’s core technology and product development closely follows the Ethernet technology change. With silent work and little accumulation, Zhaolong’s products have been exported to more than 100 countries and regions around the world, having a wide range of applications in 5G communication, cloud computing, data center, smart city, industrial automation, Internet of vehicles, smart home, special applications (medical, photovoltaic, lithium, wind energy, maritime ships, rail transit, nuclear power, aerospace) and other fields.
Zhaolong LongCar® series products include on-board coaxial cable, on-board HSD cable, on-board SPE cable and other automotive data communication cable products. At present, the company's on-board data communication cable has passed the IATF 16949 automotive special cable system certification.
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