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

Abstract

The invention discloses a method, a device and a storage medium for realizing a one-step mode of a precise time protocol message, including: recording the message time; identifying a PTP message, judging whether it is a one-step message; Save the arrival timestamp, save the arrival timestamp of the message in the register in the PHY; in the sending direction, read the arrival timestamp of the message, use the departure timestamp and the arrival timestamp to calculate the dwell time, and then use the Leave time to modify the correction field field of the PTP message, the present invention records the entry and departure time of the message at the MDI by the PHY, and modifies the correction field of the PTP message while forwarding, so as to realize one step of the PTP message on the TC The mode processing eliminates the delay error on the PHY; it does not require the upper-layer module to participate in the processing of the PTP packets forwarded by the local TC, which simplifies the implementation of the TC; at the same time, it avoids the extra network bandwidth occupation in the two-step mode, and It also reduces product development and maintenance costs.

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 a one-step mode of a precise time protocol message. Background technique [0002] The Precision Time Protocol (PTP) defined by IEEE1588 is a widely used time synchronization technology solution. The need for time synchronization of the distribution network. PTP calculates and recovers the local clock and frequency by recording the time stamps of specific PTP protocol packets arriving and leaving the device. 1588v2 has 3 clock modes: normal clock (OC), boundary clock (BC) and transparent clock (TC). [0003] End-to-End Transparent Clock (E2ETC) needs to add the local residence time (residenceTime) and subtract the egress delay in the correction field (c orrectionField) in the delay request message (Delay Req) in the PTP Asymmetry correction (delayAsymmetry) time. E2ETC needs to add local dwell time and entry delay asymme...

AI Technical Summary

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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