Coaxial Ethernet physical layer data processing method and equipment thereof

Abstract

The present invention discloses an Ethernet physical layer device, which comprises an analog interface unit communicated with coaxial network, an MAC layer interface unit communicated with the Ethernet, a coding decoding unit connected with the MAC layer interface unit, and an analog-digital or digital-analog unit connected with the coding decoding unit; the coding decoding unit comprises a coding unit used to code the data frame transmission, and set a frame end flag EOF at the ending of the data frame transmission, the effective electrical level width of the EOF is less than the pre set width; a decoding unit used to decode the data frame from the coaxial network, and confirm that the data frame is ended when the EOF is discovered. In the condition of a coaxial branch distributor with serious low frequency damping, the present invention reduces the impaction of the low frequency damping to the EOF signal through reducing the EOF pulse width.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a coaxial Ethernet physical layer data processing method and equipment. Background technique [0002] In an Ethernet communication system, data transmission is performed between devices through a physical layer, and data encoding and decoding is implemented by a PMD (Physical Medium Dependent, physical medium dependent) sublayer in the physical layer. The PMD sublayer encoding methods of the existing Ethernet standards include: NRZ (Non-Return-to-Zero, non-return-to-zero) encoding, NRZI (Non-Return-to-Zero-Inverse, non-return-to-zero inverse) encoding, Manchester (Manchester) coding, MLT-3 (Multi-level Transmission-3 levels, multi-level transmission-3 levels) coding and PAM (Pulse Amplitude Modulation, pulse amplitude modulation) coding, etc. The specific coding structure is as figure 1 Shown: The NRZ encoding method is usually used in low-speed communication, and is repr...

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Problems solved by technology

(RX_ER error causes RX_DV to be invalid and cannot be read normally) according to Figure 4 , after the MAC layer chip receives a signal with a reception error indication, it will lose the entire data frame, which will make it impossible for the Ethernet encoded with the existing 10Base-T standard to be transmitted on the coaxial splitter network of radio and television

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