Method and device for realizing precise time protocol synchronization message and storage medium
A technology of precise time protocol and synchronization message, applied in the field of Ethernet, it can solve problems such as difficult implementation, inability to completely eliminate PHY errors, and occupation of network bandwidth, etc., to reduce development difficulty, reduce development and maintenance costs, and eliminate time The effect of delay error
Active Publication Date: 2021-05-28
KUNGAO XINXIN MICROELECTRONICS (JIANGSU) CO LTD
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[0015] The purpose of the present invention is to provide a method, a device and a storage medium for realizing precise time protocol synchronization messages; to solve the problem of occupying a large amount of network bandwidth in the main scheme of TC for realizing PTP Sync messages at present, and it is difficult to realize, and the error caused by PHY cannot be completely eliminated , leading to the problem of limited time accuracy improvement; the present invention realizes the one-step mode forwarding of PTP TC to Sync messages at the physical layer, improves the PTP time accuracy, and simplifies the design of the TC equipment system
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[0046] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments. It should be noted here that although the descriptions of these embodiments are used to help the understanding of the present invention, they are not intended to limit the present invention. Specific structural and functional details disclosed herein are for purposes of describing example embodiments of the invention only. However, the invention may be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.
[0047] It should be understood that for the term "and / or" that may appear in this article, it is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and / or B may indicate: A exists alone, B alone exists, and A and B exist at the same time; for the term " / and" that may appear in this article, it describes anoth...
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The invention discloses a method and a device for realizing precise time protocol (PTP) message synchronization, and a storage medium. The method comprises the following steps: recording message time, identifying a PTP message, and judging whether the PTP message is a one-step Sync message; in a receiving direction, carrying out correction field modification processing on a one-step Sync message, and reading a timestamp recorded in a starting timestamp field OriginTimestamp when a new correction field is modified; and processing a one-step Sync message in a sending direction, and setting a start timestamp OriginTimestamp as a departure timestamp. According to the invention, the PHY records the entering and leaving time of the message at the MDI, and the one-step mode processing of the Sync message on the TC is realized by modifying the correction domain and the starting timestamp field of the PTP message while forwarding, so that the realization difficulty of the TC is simplified; extra network bandwidth occupation is avoided, and the time precision is also improved; and according to the invention, one-step Sync message modification is realized in the physical layer, the time precision is improved, the development difficulty of the system is reduced, 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 precise time protocol synchronization messages. 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 add the local residence time (residenceTime) and the ingress d...
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IPC IPC(8): H04J3/06
CPCH04J3/0667
Inventor 李占斌周沁
Owner KUNGAO XINXIN MICROELECTRONICS (JIANGSU) CO LTD
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