Method and device for realizing one-step mode of precise time protocol message, and storage medium

Abstract

The invention discloses a method and device for realizing a one-step mode of a precise time protocol message, and a storage medium; the method comprises the steps: recording the message time; then identifying the PTP message, judging whether the PTP message is a one-step message or not, if the PTP message is the one-step message in the receiving direction, storing an arrival timestamp, and storing the arrival timestamp of the message in a register in a PHY; then in the transmitting direction, reading the arrival timestamp of the message and calculating the residence time by using the departure timestamp and the arrival timestamp, and then modifying the correction domain field of the PTP message by using the residence time. According to the invention, the PHY records the entering and departure time of the message at the MDI, and the correction domain of the PTP message is modified while forwarding; therefore, the one-step mode processing of the PTP message on the TC is realized, and the time delay error on the PHY is eliminated; besides, the upper layer module does not need to participate in processing of the PTP message forwarded by the local TC, so that the implementation difficulty of the TC is simplified. Meanwhile, extra network bandwidth occupation in a two-step mode is avoided, and the development and maintenance cost of the product is also reduced.

Description

technical field [0001] The invention belongs to the field of Ethernet, and in particular relates to a method, a device and a storage medium for realizing the one-step mode of the precise time protocol message. Background technique [0002] The Precision Time Protocol (PTP) defined by IEEE1588 is a widely used time synchronization technology solution at present. The full name of IEEE1588 is "Precision Clock Synchronization Protocol Standard for Network Measurement and Control Systems", which is used to meet measurement and control applications. Distributed network time synchronization needs. PTP calculates and restores the local clock and frequency by recording the time stamps when specific PTP protocol packets arrive and leave the device. 1588v2 has 3 clock modes: Ordinary Clock (OC), Boundary Clock (BC) and Transparent Clock (TC). [0003] The end-to-end transparent clock (End-to-End Transparent Clock, E2ETC) needs to increase the local residence time (residenceTime) in t...

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Problems solved by technology

[0012] The purpose of the present invention is to provide a method, device and storage medium for realizing the one-step mode of the precise time protocol message; to solve the problem that the current main scheme of TC for PTP is difficult to implement, and the error caused by the PHY cannot be completely eliminated, resulting in limited time accuracy improvement Problem, the present invention realizes the one-step mode forwarding of PTP TC at the physical layer by using multi-port PHY, while improving the PTP time accuracy, it also simplifies the design of the TC equipment system

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