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A method and device for measuring asymmetric delay of optical fiber transmission link

A technology of optical fiber transmission and measurement method, applied in transmission systems, digital transmission systems, electromagnetic wave transmission systems, etc., and can solve problems such as limited application scope and inapplicability

Active Publication Date: 2018-05-29
四川泰富地面北斗科技股份有限公司
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Problems solved by technology

[0018] In short, the existing measurement methods for asymmetric delay have their own shortcomings, and the scope of application is very limited, especially not suitable for occasions with optical repeaters (REG) and optical amplifiers (EDFA)

Method used

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  • A method and device for measuring asymmetric delay of optical fiber transmission link
  • A method and device for measuring asymmetric delay of optical fiber transmission link
  • A method and device for measuring asymmetric delay of optical fiber transmission link

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Embodiment Construction

[0103] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0104] In order to solve the aforementioned technical problems, the technical solution adopted by the present invention is: based on the optical fiber communication system of dual-fiber bidirectional transmission, the time stamp information message between the master and slave devices is transmitted to calculate the time stamp between the master and slave devices. Time deviation, so as to realize the time synchronization between the master and slave devices, the specific implementation method and steps are as follows:

[0105] Assume that the lengths of the two optical fiber links for bidirectional transmission are not...

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Abstract

The invention discloses a method and a device for measuring optical fiber transmission link asymmetric time delay, relating to the optical communication technology field and high precision time frequency synchronization technology field. The method disclosed by the invention comprises steps of transmitting optical signals having wavelengths of ^1 and optical signals having wavelength of ^2 between a main station device and a slave station, obtaining moment values of the main station and the slave station which mutually transmit and receive messages, and calculating the optical fiber link asymmetric time delay value between the main device and the slave device according to the moment value and performing synchronization correction.

Description

technical field [0001] The invention relates to the technical field of optical communication and the technical field of high-precision time-frequency synchronization, in particular to the measurement technology of the asymmetric time delay of the optical fiber transmission link. Background technique [0002] IEEE 1588v2 clock synchronization technology is a technical means to replace space-based timing systems such as GPS / GLONASS / Beidou satellites to solve the time synchronization problem of communication networks, and is currently an optional solution to the time synchronization problem of mobile communication networks. IEEE 1588v2 is a precision time protocol (PTP, Precision Time Protocol for short) suitable for distributed control systems with multipoint communication. In the Packet Transport Network (PTN), the IEEE 1588v2 protocol is generally used to transmit the time synchronization signal to each node device in the network, so as to realize the high-precision time syn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04B10/079
CPCH04B10/0795H04L43/0858
Inventor 彭良福李有生李忠文孟志才李高峰侯丙安李霖
Owner 四川泰富地面北斗科技股份有限公司
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