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Transmission performance assessment method and apparatus in coherent transmission system

A technology of transmission performance and coherent transmission, applied in the field of transmission detection, which can solve the problems such as the limitation of the accuracy of the evaluation results and the lack of consideration of the WDM system.

Inactive Publication Date: 2016-01-27
ZTE CORP +1
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Problems solved by technology

However, in the existing schemes, the WDM system is not considered to be affected by factors such as Stimulated Raman Scattering (SRS), which are more important to channel performance, and the accuracy of the evaluation results is thus limited.

Method used

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  • Transmission performance assessment method and apparatus in coherent transmission system
  • Transmission performance assessment method and apparatus in coherent transmission system
  • Transmission performance assessment method and apparatus in coherent transmission system

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Embodiment Construction

[0034] Such as figure 1 As shown, in the WDM system, SRS changes the optical signal power in the transmission process, and the short-wavelength channel power in the system λ 1 , lambda 2 , lambda 3 , lambda 4 The power transfer to the long-wavelength channel increases the nonlinear noise of the long-wavelength channel and affects the system performance.

[0035] In the embodiment of the present invention, the SRS noise power corresponding to the channel, the ASE noise power corresponding to each span in the optical fiber link, and the nonlinear noise power corresponding to each span of the channel are obtained; according to the SRS noise power , the ASE noise power corresponding to each span, the nonlinear noise power corresponding to each span, and obtain the signal-to-noise ratio corresponding to each span of the channel; according to the signal-to-noise ratio SNR corresponding to each span , to obtain the transmission performance of the entire fiber link of the channel....

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Abstract

The invention discloses a transmission performance assessment method in a coherent transmission system. The method comprises the steps: obtaining SRS noise power corresponding to a channel, ASE noise power corresponding to each cross segment in a fiber link, and nonlinear noise power corresponding to each cross segment of the channel; obtaining a corresponding signal to noise ratio of each cross segment of the channel according to the SRS noise power corresponding to the channel, the ASE noise power corresponding to each cross segment in the fiber link, and the nonlinear noise power corresponding to each cross segment of the channel; and obtaining the transmission performance of the whole fiber link of the channel according to the corresponding signal to noise ratio of each cross segment. The invention also discloses a transmission performance assessment apparatus in a coherent transmission system.

Description

technical field [0001] The present invention relates to transmission detection technology, in particular to a transmission performance evaluation method and device in a coherent transmission system. Background technique [0002] Physical damage perception and transmission performance evaluation technologies have important applications in high-speed optical transmission networks. After the transmission performance of the optical path is obtained based on the transmission performance evaluation device, the evaluation results can be applied to the planning and design of the transmission path of the all-optical network, physical damage-aware routing, wavelength allocation and network resource management, so as to realize the reliability of the transmission quality of the optical network and the overall quality of the network. Effective performance improvement. The existing optical network transmission performance evaluation generally only considers some linear damage factors, s...

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Application Information

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IPC IPC(8): H04B10/075
Inventor 高冠军王磊费爱梅李圆圆
Owner ZTE CORP
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