Method and system for realizing synchronization through 1588 protocol

A protocol implementation, t21 technology, applied in transmission systems, synchronization devices, digital transmission systems, etc., can solve problems such as inaccurate offsets and no consideration of frequency drift, improve timing accuracy, and reduce the dependence of message interaction frequency. Effect

Inactive Publication Date: 2012-11-14
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method does not consider frequency drift. If the interaction time is too lon

Method used

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  • Method and system for realizing synchronization through 1588 protocol
  • Method and system for realizing synchronization through 1588 protocol
  • Method and system for realizing synchronization through 1588 protocol

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Embodiment Construction

[0043] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0044] figure 2 It is a flowchart of a method for realizing synchronization through the 1588 protocol in an embodiment of the present invention, such as figure 2 As shown, the method of the present embodiment includes:

[0045] S10. Using a recursive algorithm to calculate the offset value in real time;

[0046] S20. Perform synchronization according to the offset value.

[0047] Wherein, the recursive algorithm can be:

[0048] offset k = t 1 ...

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Abstract

The invention provides a method and system for realizing PTP (Picture Transfer Protocol) synchronization through a 1588 protocol. The method comprises the following steps of: using a recursive algorithm to calculate an offset value in real time; and carrying out synchronization according to the offset value. With the adoption of the method and the system provided by the invention, the dependence of synchronization precision on message interaction frequency can be reduced.

Description

technical field [0001] The present invention relates to the field of data communication, in particular to providing a method and system for realizing PTP (Precise Clock Synchronization Protocol) synchronization through 1588. Background technique [0002] At present, the design schemes for clock synchronization through 1588 are mainly divided into the following two categories: [0003] Scheme 1, 1588 realizes phase synchronization, calculates the time difference between the master clock and the slave clock through the 1588 protocol, and performs phase adjustment; the method of frequency recovery is to restore the clock frequency of the Ethernet line through synchronous Ethernet technology; the disadvantage of this method is the phase and frequency Different sources, if the synchronous Ethernet of the intermediate node of the network equipment is abnormal, it will cause the frequency offset and phase jump of the downstream equipment; and if there is a problem, it is impossible...

Claims

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Application Information

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IPC IPC(8): H04L7/00
Inventor 庞贺
Owner ZTE CORP
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