What is Car Ethernet Vehicle Router,Vehicle 4G Router,Vehicle 4G Wireless Router,Vehicle Wifi Router Shenzhen MovingComm Technology Co., Ltd. , https://www.movingcommtech.com
Car Ethernet is a new local area network technology that uses Ethernet to connect the electronic unit in the car. Unlike traditional Ethernet, which uses 4 unshielded twisted pair cables, car Ethernet can achieve a transmission rate of 100Mbit/s or even 1Gbit/s on a single pair of unshielded twisted pair cables. At the same time, it also meets the requirements of the automotive industry for high reliability, low electromagnetic radiation, low power consumption, bandwidth allocation, low latency and synchronous real-time. The physical layer of on-board Ethernet uses BroadRReach technology, and BroadR-Reach's physical layer (PHY) technology has been standardized by the One-pair Ethernet Alliance (OPEN). Therefore, it is sometimes called Broad RReach (BRR) or OABR (Open Alliance BroadR-Reach). The MAC layer of vehicle Ethernet adopts the IEEE 802.3 interface standard and seamlessly supports widely used high-level network protocols (such as TCP/IP) without any adaptation.
On-board Ethernet protocol architecture
Vehicle-borne Ethernet and its supported upper-layer protocol architecture are shown in Figure 1. Vehicle-borne Ethernet mainly involves OSI layer 1 and Layer 2 technologies, while vehicle-borne Ethernet also supports AVB, TCP/IP, DOIP, SOME/IP and other protocols or application forms.
On-board Ethernet framework
Among them, AVB is an extension of traditional Ethernet functions, which enhances the real-time performance of traditional Ethernet audio and video transmission by adding precise clock synchronization, bandwidth reservation and other protocols, and is a network audio and video real-time transmission technology with great development potential. SOME/IP (Scalable Service-Oriented MiddlewarE on IP) specifies the video communication interface requirements for vehicle camera applications, which can be applied to the field of vehicle cameras, and realizes the mode control of driver assistance cameras through apis.
As an extension of AVB protocol, Time-Sensitive Networking (TSN) introduces related technologies of time-triggered Ethernet, which can efficiently realize the transmission of automotive control information. In addition, the on-board Ethernet of the 1Gbit communication standard also supports Power Over Ethernet (POE) function and Energy-Efficient Ethernet (EEE) function. The POE function provides power for connected terminal devices while transmitting data through twisted pair cables, eliminating the need to connect external power cables to terminals and reducing the complexity of power supply.
On-board Ethernet standardization
In terms of in-vehicle Ethernet standardization, the IEEE802.3 and IEEE802.1 working groups, AUTOSAR, the OPEN Alliance and the AVnu Alliance have played a major role in promoting it.
The IEEE802.3 local area network standard represents the mainstream Ethernet standard in the industry, and the on-board Ethernet technology is developed on the basis of IEEE802.3, so the IEEE is currently the most important international standardization body for on-board Ethernet. In order to meet the requirements of the car, it involves the development of a number of new specifications and the revision of the original specifications within the two working groups of IEEE802 and 802.1, including PHY specifications, AVB specifications, and single-wire to data line power supply. In addition, AVB related to AV transmission, timing synchronization and other specifications also need to be standardized by other technical committees of IEEE, such as IEEE1722 and IEEE1588.
OPEN Alliance
The OPEN Industry Alliance was launched in November 2011 by Broadcom, NXP, and BMW to promote the application of Ethernet-based technology standards to in-car connectivity. The main standardization goal is to develop a 100Mbit/s BroadR-R physical layer standard and develop OPEN interoperability requirements.
AUTOSAR
AUTOSAR is a consortium of automotive manufacturers, suppliers, and tool developers that aims to develop an open, standardized automotive software architecture, and the AUTOSAR specification already includes the automotive TCP/UDP/IP protocol stack.
AVnu
The AVnu Alliance was formed by Broadcom in collaboration with Cisco, Harman and Intel to promote the IEEE 802.1 AVB standard and the Time Synchronization Network (TSN) standard, establish a certification system, and address important technical and performance issues such as precise timing, real-time synchronization, bandwidth reservation, and traffic shaping.
Three parts make up the Internet of Things and common wireless frequency band division
The Internet of Things (IoT) has become one of the most talked-about topics in today's world. From Germany’s Industry 4.0 to smart transportation systems in the United States and smart cities in China, the IoT revolution is being adapted in different ways across countries, each leveraging its own strengths and strategic priorities.
Rather than being seen as just an industry, it’s more accurate to think of it as a service. It reflects not only the rapid technological advancements we are witnessing but also the exciting possibilities for our future. So, what exactly is the Internet of Things?
1. What is the Internet of Things?
The Internet of Things is made up of three main components: the perception layer, the network layer, and the application layer. A popular analogy used online compares the IoT system to a tree. The root represents the technical foundation — including sensor technology, embedded processors, and connection equipment. These elements form the base that supports the entire system. The level of development in these technologies determines how strong the trunk and canopy grow.
Sensor Technology & Equipment: This includes devices like pressure sensors, temperature sensors, and humidity sensors, which collect real-world data.
Embedded Processing Technology & Equipment: This involves microcontrollers (MCUs), microprocessors (MPUs), and network processors that process the data collected by sensors.
Connection Technology & Equipment: This covers technologies such as NFC, Zigbee, GPS, and Wi-Fi, which enable communication between devices.
Above the root is the trunk — the software part. This is the central nervous system of the IoT tree, consisting of device driver software, server software, and application client software.
Finally, the canopy represents the application layer. This is where the IoT system delivers value, divided into industrial applications and consumer applications.
2. ZLG IoT Wireless Solution
As a key player in the IoT industry, intelligent hardware plays a crucial role. A reliable and mature wireless solution ensures more stable products and a better user experience. As a leader in the embedded field, ZLG has been focused on developing and designing IoT wireless modules, providing a solid "root" for upper-level products.
Common wireless frequency bands used in the IoT industry include:
[Image: http://i.bosscdn.com/blog/pI/YB/AF/p3udqAZQ0EAACN2zoqFYQ103.png]
ZLG's wireless products are widely used in industrial, medical, and consumer sectors, known for their high stability. The company is also working on integrating wireless modules with MCUs in the form of core modules, maximizing the stability of the lower layer and reducing the complexity of secondary development for customers.
New technologies always emerge to solve specific problems. Each technology addresses different needs, and no single solution can cover all IoT requirements. In the IoT ecosystem, multiple wireless technologies coexist, complementing and integrating with each other. For example, a LoRa gateway can connect via Ethernet or Wi-Fi, while BLE excels in human-computer interaction scenarios.