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OTN (Optical Transport Network) device and method for realizing time synchronous transmission

A device and time stamp technology, applied in the field of network communication, can solve the problem of inability to achieve high-precision time synchronization transmission

Inactive Publication Date: 2012-12-26
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Aiming at the shortcomings of the prior art, the present invention provides an OTN device and method for realizing time synchronous transmission in order to solve the problem that the OTN equipment in the prior art cannot realize high-precision time synchronization transmission

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  • OTN (Optical Transport Network) device and method for realizing time synchronous transmission

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Embodiment Construction

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0063] Based on some synchronous messages and basic technical principles defined by IEEE 1588v2, the present invention provides a technical solution suitable for use in OTN including synchronous message encapsulation and interaction process, message processing method, clock adjustment algorithm and device functional structure. The OTN using asynchronous clock technology can achieve high-precision time synchronization transmission after frequency compen...

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Abstract

The invention relates to the technical field of network communication, and provides an OTN (Optical Transport Network) device and a method for realizing the time synchronous transmission. According to the device and the method, provided by the invention, and on the basis of the synchronous message and the fundamental principle of IEEE (Institute of Electrical and Electronic Engineering) 1588v2 definition, the synchronous message package, the interactive process, the message processing mode, the clock regulation algorithm and the like which are suitable to be used in an OTN are provided, a corresponding device functional structure is also provided, the high-accuracy time synchronous transmission of the OTN which adopts a synchronous clock technology can be realized after compensation, and the high-accuracy synchronous transmission can be realized without on the basis that functions such as complicated synchronous Ethernet are added.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to an OTN device and method for realizing time synchronization transmission. Background technique [0002] In the standard formulation process of ITU-T SG15, the transmission of synchronous time information by OTN (Optical Transport Network, Optical Transport Network) is a hot topic, and quite a few proposals have elaborated on this requirement. For example, wireless access technologies such as TD-SCDMA and CDMA2000 require time synchronization with an accuracy of ±1.5us and ±3us respectively. However, the current solution of using built-in GPS in base stations to achieve time synchronization has high failure rates, high costs, and difficulties in installation and maintenance. To solve the problem, it is of great significance to realize the replacement of transmitting time synchronization signals through the ground network. IEEE 1588v2 is an optimal technology choice ...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04J3/06
CPCH04J3/065
Inventor 杨鹏飞王立芊陈雪房超孙曙和陈江峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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