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A transmission method and transmission system for optical layer oam information

A data and frequency point technology, applied in the field of optical layer OAM information transmission method and transmission system, can solve the problems of low power value of optical layer OAM information, difficult optical layer OAM information demodulation at the receiving end, and easy to be submerged by noise, etc. , to achieve the effect of low cost, high reliability and noise reduction

Active Publication Date: 2022-04-26
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a transmission method and transmission system for optical layer OAM information, the purpose of which is to use IDFT transformation at the transmitting end to modulate the optical layer OAM information to the corresponding frequency point, At the receiving end, the DFT transformation is used to demodulate the data at the frequency point, and the superimposed bit data after phase compensation can reduce the influence of noise, indirectly improve the signal-to-noise ratio of the bit data, and facilitate the receiving end to determine the specific value of the bit data , and then effectively identify the optical layer OAM information, thereby solving the technical problem that the power value of the optical layer OAM information is very small, it is easy to be submerged by noise, and it is difficult for the receiving end to accurately demodulate the optical layer OAM information on each wavelength

Method used

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  • A transmission method and transmission system for optical layer oam information
  • A transmission method and transmission system for optical layer oam information
  • A transmission method and transmission system for optical layer oam information

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Embodiment 1

[0047] refer to figure 1 , in order to reduce the difficulty of identifying the optical layer OAM information on each wavelength, this embodiment provides a transmission method for optical layer OAM information, the transmission method includes the following steps:

[0048] Step 101: Assign an independent modulation frequency band to each service wavelength in the WDM network, and select N frequency points in the modulation frequency band.

[0049] In this embodiment, each wavelength in the WDM network is first allocated a mutually independent modulation frequency band, and N frequency points are selected in the modulation frequency band, and each service wavelength maps the information that needs to be carried to N frequency points in the respective frequency band. frequency point.

[0050] For example, the total modulation frequency range is 500k~1MHz, the modulation range allocated to each service wavelength is 500Hz, and 24 frequency points are allocated within 500Hz, and...

Embodiment 2

[0080] refer to Figure 4 , this embodiment also provides a transmission system for optical layer OAM information, wherein the transmission system includes a transmitting end and a receiving end, and the transmitting end and the receiving end cooperate with each other to complete the transmission method described in Embodiment 1.

[0081] Specifically, see Figure 5 , the transmitting end includes an adjustable optical attenuator VOA and a wavelength division multiplexer, and the receiving end includes a multi-stage optical amplifier OA, and each optical amplifier is equipped with an APD, an AD converter and a data processing unit, wherein the APD and the optical amplifier The AD converter is connected with the APD, and the data processing unit is connected with the AD converter.

[0082] In this embodiment, the transmitting end is used to convert the optical layer OAM information into M subframe data, and map each bit data of each subframe data to N frequency points of the c...

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Abstract

The invention discloses a transmission method and transmission system of optical layer OAM information. The method includes assigning an independent modulation frequency band to each service wavelength in the WDM network, selecting N frequency points in the modulation frequency band; the transmitting end converts the optical layer OAM information into M subframe data, and converts each bit of each subframe data The data are respectively mapped to N frequency points of the corresponding service wavelength, and the IDFT transformation is selectively performed on the frequency point according to the specific value of the bit data on each frequency point to obtain the target data; the receiving end performs DFT transformation on the target data to obtain each The size of the SNR value of the bit data corresponding to the frequency point determines the bit data to obtain subframe data; M subframe data are spliced ​​to obtain optical layer OAM information. The present invention can demodulate the optical layer OAM information without using an optical filter and the traditional clock synchronization scheme used in data frame transmission, and has low cost and high reliability.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to a method and system for transmitting optical layer OAM information. Background technique [0002] The path of each wavelength in ROADM (Reconfigurable Optical Add-Drop Multiplexer, Reconfigurable Optical Add-Drop Multiplexer) network can be flexibly changed according to needs. At the same time, with the development of technology, the rate and modulation pattern of each wavelength are no longer fixed. , which can be switched as needed. The OAM (Operation Administration and Maintenance) of the optical layer has become very important, and a technology is needed to transmit these wavelength-level information at the optical physical layer, and it can also be detected at the route site (non-electrical relay station) to increase the management of ROADM networks and maintainability. [0003] In a traditional WDM (Wavelength Division Multiplexing, wavelengt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/556H04B10/69H04J14/02
CPCH04B10/5563H04B10/697H04J14/02
Inventor 梅亮杨超于文海栾艳彩
Owner FENGHUO COMM SCI & TECH CO LTD