A Synchronization Method for Optical Transmission Network
A technology of optical transmission network and optical network, which is applied in the field of optical transmission, and can solve the problems of increased optical fiber length, increased equipment complexity, cost, and errors
Inactive Publication Date: 2020-11-24
STATE GRID ZHEJIANG ELECTRIC POWER
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Problems solved by technology
[0003] At present, the synchronization method of the optical transmission network is mainly realized by directly sending synchronization signals between various devices, but this method has the following disadvantages: 1) As the transmission distance increases, the length of the optical fiber also increases significantly, which causes When the synchronization signal is directly transmitted, errors will occur; 2) The direct transmission of the optical synchronization signal requires the use of an optical transceiver, which greatly increases the complexity and cost of the equipment
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[0022] The method for locating an optical transmission network fault provided by the present invention will be further described in detail below.
[0023] The invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, it being understood that those skilled in the art may modify the invention described herein and still achieve the beneficial effects of the invention. Therefore, the following description should be understood as the broad knowledge of those skilled in the art, but not as a limitation of the present invention.
[0024] In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions and constructions are not described in detail since they would obscure the invention with unnecessary detail. It should be appreciated that in the development of any practical embodiment, numerous implementation details m...
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The invention provides a synchronization method of an optical transmission network, which comprises the following steps: S1, an optical network transit node generates a standard synchronization pulse,and sends a detection instruction to each network node according to the standard synchronization pulse optical network transit node; S2, after receiving the detection instruction data information andidentifying the trigger code, the N network nodes feed back a feedback instruction to the optical network transit node immediately; S3, the optical network transit node receives a feedback instruction fed back by each network node, identifies a corresponding mark code, and calculates optical transmission delay between the optical network transit node and each network node; S4, the optical networktransit node sends an adjustment clock signal to each network node, and calculates frequency conversion time; and S5, exciting the synchronization pulse of each network node at the end of the frequency conversion time to realize signal synchronization.
Description
technical field [0001] The invention belongs to the field of optical transmission, in particular to a synchronization method for an optical transmission network. Background technique [0002] Optical transmission is a technology that transmits in the form of optical signals between a sender and a receiver. In an optical transmission network, optical signals are transmitted between transmission nodes through optical fibers. The optical transmission network has high sensitivity, is not susceptible to electromagnetic interference, has small communication attenuation, and has a long transmission distance. Therefore, it is widely used in various data transmission networks. In an optical transmission network, there needs to be a synchronous time relationship between devices, that is, a synchronous relationship. If there is an error in the synchronization or the synchronization is lost, a large number of error information codes will appear in the entire optical transmission netw...
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IPC IPC(8): H04J3/06H04Q11/00H04B10/25
CPCH04J3/0638H04Q11/0062
Inventor 赵建朋杨鸿珍吴秋晗刘俊毅吴慧范超王彦波彭瑶张明熙娄佳沈佳辉
Owner STATE GRID ZHEJIANG ELECTRIC POWER