51. Research on Physical Layer Circuit of Train Ethernet
- Author
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WU Wenhui, WEN Fa, YIN Jun, WANG Xianbing, and CHEN Dong
- Subjects
ethernet ,physical layer ,mii interface ,emc protection ,network port consistency test ,train communication ,Control engineering systems. Automatic machinery (General) ,TJ212-225 ,Technology - Abstract
Ethernet circuit based on IEEE 802.3 has been widely used in the field of rail transit. Open systems interconnection (OSI) model divides Ethernet into seven layers, of which the physical layer (PHY) belongs to the first layer, which is mainly responsible for converting Ethernet signals into specific electrical signals and transmitting them to Ethernet cables, and plays a very important role in the interconnection between different network interfaces. In order to improve the reliability of train network system based on Ethernet and improve the quality of train communication, this paper designs and studies the physical layer circuit of train Ethernet, including PHY chip filtering and impedance matching, the application of different xMII (medium independent interface) interfaces, EMC protection, factors in the consistency test of network interface and PCB layout and wiring rules, and designs an Ethernet physical layer circuit according to the research results. The application results show that the designed circuit is suitable for the field of train Ethernet communication, and has strong EMC protection ability and high reliability.
- Published
- 2022
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