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车载以太网,速度直指Tbps?
半导体芯闻· 2026-03-23 10:24
Core Viewpoint - The automotive industry is transitioning towards Ethernet technology for in-vehicle networks, as it offers higher speeds and better performance compared to traditional CAN bus systems. The 10BASE-T1S standard is emerging as a potential replacement for CAN, with speeds reaching up to 10 Mbit/s, while future developments may push speeds to gigabit levels and beyond [2][5][24]. Group 1: Advantages of Automotive Ethernet - Automotive Ethernet is faster and lighter than copper wiring, having undergone extensive testing under various environmental conditions, making it a standard choice for data transmission [2]. - The technology allows for simplified wiring systems and supports multiple endpoints through a single twisted pair cable, enhancing the efficiency of vehicle networks [2][5]. - The integration of different Ethernet types, such as 10BASE-T1S, with existing standards is technically feasible but complex, which may lead some OEMs to retain CAN or LIN in certain applications due to cost considerations [2][5][24]. Group 2: Challenges Facing Automotive Ethernet - Current automotive Ethernet faces challenges such as noise, testing, and interoperability, which need to be addressed for widespread adoption [3][5]. - The evolving standards for automotive Ethernet, including speed requirements, have made it difficult for manufacturers to keep pace with technological advancements [3][5]. Group 3: Future Trends and Requirements - The demand for higher speeds in vehicles equipped with advanced entertainment features is expected to grow, with potential speeds reaching gigabits per second in the near future [5][10]. - The shift towards software-defined vehicles (SDVs) necessitates robust Ethernet solutions to support advanced driver-assistance systems (ADAS) and over-the-air updates [7][10]. - The integration of AI and high-performance computing capabilities in vehicles will drive the need for higher bandwidth and more sophisticated networking solutions [24]. Group 4: Emerging Technologies - Optical Ethernet is being considered as a viable alternative to copper cables, offering advantages such as higher bandwidth, lighter weight, and better electromagnetic interference resistance [12][13]. - The development of SerDes technology remains crucial for high-bandwidth connections, particularly for applications requiring low latency and high reliability [14][15]. - The convergence of automotive and data center technologies is anticipated, with advancements in chip design and architecture influencing the future of automotive networking [17][19].