SDH transmission method of IEC61588

An Ethernet and protocol converter technology, applied in transmission systems, electrical components, time-division multiplexing systems, etc., can solve problems such as low reliability, inconsistent accuracy, and inability to guarantee time synchronization, and achieve cost savings and accuracy. high effect

Inactive Publication Date: 2018-06-12
GUIZHOU POWER GRID CO LTD +1
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Problems solved by technology

[0003] At present, the realization of the time synchronization system is mainly completed by the GPS/BD receiver of each system for satellite positioning. However, the performance of the receiver device of each manufacturer is u

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  • SDH transmission method of IEC61588
  • SDH transmission method of IEC61588
  • SDH transmission method of IEC61588

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Embodiment Construction

[0036] The present invention discloses an SDH transmission IEC61588 method. The specific implementation of the present invention will be further described below in combination with preferred embodiments.

[0037] see attached Figure 1 to Figure 12 , showing the working principle of the SDH transmission IEC61588 method.

[0038] see attached Figure 1 to Figure 3 , PTP protocol packets are transmitted through SDH. The SDH user interface, usually an E1 interface, converts the HDB3 code stream of the E1 (protocol converter) and the Ethernet protocol code stream format. Such as figure 2 As shown, at the time source, the master clock (primary PTP master clock) sends a protocol message through the Ethernet, and the Ethernet code stream is converted into an E1HDB3 code stream through the protocol converter, and then passed through the SDH network step by step. before reaching the slave clock, such as image 3 As shown, the E1HDB3 code stream is converted into an Ethernet code ...

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Abstract

The invention discloses an SDH transmission method of IEC61588. S1: ethernet bit stream including a PTP protocol message is transmitted by a primary PTP master clock through the ethernet. S2: the ethernet bit stream of S1 is converted to E1 HDB3 bit stream by a protocol converter. S3: the E1 HDB3 bit stream of S2 is transmitted by the SDH internet step by step. S4: the E1 HDB3 bit stream of S3 isconverted to the ethernet bit stream by the protocol converter. S5: the PTP protocol message is obtained by a slave clock from the ethernet bit stream of S4, and time of the slave clock is adjusted according to a hardware time stamp of the PTP protocol message. The SDH transmission method of IEC61588 utilizes the SDH transmission to transmit clock signal so that cost is effectively saved, and precision of the PTP networking is high so that nanometer precision is achieved through precise compensation.

Description

technical field [0001] The invention belongs to the technical field of clock synchronization, and in particular relates to an SDH transmission IEC61588 method. Background technique [0002] With the development of the power grid in the direction of intelligence, and the networkization of measurement and control data collection and transmission, higher requirements are placed on the accuracy of network timing. IEC61588, also known as PTP, is a precision clock synchronization protocol standard dedicated to industrial control and measurement. Automation, especially distributed motion control, has generated strong interest in it. International military applications have also started, remote communication and power systems Its applications are also flourishing in related fields. [0003] At present, the realization of the time synchronization system is mainly completed by the GPS / BD receiver of each system for satellite positioning. However, the performance of the receiver devic...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04L29/06
CPCH04J3/0667H04L69/08H04L69/22
Inventor 刘豪许文叶泂涛王建鸿王祥李巍杨彬刘嵩韩晓明杨芳林蒋宏荣方学智杨万景兰箭蒋友权陶用伟
Owner GUIZHOU POWER GRID CO LTD
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