Synchronization method of optical transmission network
An optical transmission network and optical network technology, applied in the field of optical transmission, can solve the problems of increasing the length of the optical fiber, increasing the complexity and cost of the equipment, and errors.
Inactive Publication Date: 2020-02-04
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 optical transmission network fault location method provided by the present invention will be described in further detail below.
[0023] The present invention will be described in more detail below with reference to the accompanying drawings, which show preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein and still achieve the beneficial effects of the present invention. Therefore, the following description should be understood to be widely known to those skilled in the art, and not as a limitation to the present invention.
[0024] For the sake of clarity, not all features of actual embodiments are described. In the following description, well-known functions and structures are not described in detail because they may confuse the present invention due to unnecessary details. It should be considered that in the development of any actual embodiment, a large number of implem...
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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, and particularly relates to a synchronization method of an optical transmission network. Background technique [0002] Optical transmission is a technology that transmits in the form of optical signals between the sender and the receiver. In an optical transmission network, optical signals are transmitted between various transmission nodes through optical fibers. Optical transmission network has high sensitivity, is not susceptible to electromagnetic interference, communication attenuation is small, and transmission distance is long. Therefore, it is widely used in various data transmission networks. In the optical transmission network, there needs to be a synchronized time relationship between devices, that is, a synchronization relationship. If there is an error or loss of synchronization, a large number of error information codes will appear in the entire optical transmission network, and ev...
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Login to View More 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