Method and device for improving optical network transmission efficiency

A technology of optical network transmission and optical transmission frame, which is applied in the field of signal transmission, and can solve problems such as waste of spectrum bandwidth and reduced efficiency of optical network transmission

Inactive Publication Date: 2015-07-22
SUZHOU UNIV
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Problems solved by technology

For an optical channel with a length of 3000km, the traditional discrete modulation format selection method can only select the QPSK transmission frame (its BS=2bit / symbol) to modulate the optical channel, even if a single QPSK modulation format can support an optical transmission range of 5118km
However, this simple discretized modulation format selection will inevitably lead to a great waste of spectrum bandwidth, reducing the transmission efficiency of optical networks

Method used

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  • Method and device for improving optical network transmission efficiency
  • Method and device for improving optical network transmission efficiency
  • Method and device for improving optical network transmission efficiency

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Embodiment Construction

[0038] 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 only some, not all, embodiments of the present invention. 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.

[0039] see figure 1 A schematic flowchart of an embodiment of a method for improving optical network transmission efficiency according to the present invention is shown.

[0040] Depend on figure 1 It can be seen that the method includes:

[0041] 101: Obtain the optical transmission distance of the optical channel.

[0042] 102: Determine the optical channel signal transmission spectral efficiency according to the preset relationship between the optical tr...

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Abstract

The invention discloses a method and a device for improving optical network transmission efficiency. According to the method, the signal transmission spectrum efficiency of an optical channel is determined through the optical transmission distance of the optical channel, so that the occupancies of different modulation formats in a frame structure are determined, and a transmission frame based on a time domain hybrid modulation technology is established so as to modulate the optical channel. Compared with the modulation method in the prior art adopting a discretization modulation format, the method adjusts the spectrum efficiency of the optical channel according to the transmission distance of each optical channel, so that the linear rate of each optical channel is improved, furthermore, the optical network transmission efficiency is improved on the whole.

Description

technical field [0001] The present invention relates to the field of signal transmission, and more specifically relates to a method and a device for improving the transmission efficiency of an optical network. Background technique [0002] With the exponential growth of Internet traffic, the dynamics, flexibility and spectral efficiency of optical networks have been further enhanced. [0003] At present, when modulating optical network transmission signals, under the premise of ensuring an acceptable data bit error rate (BER), since each modulation format has a maximum transmission distance without repeaters, the traditional discrete modulation For optical channels whose physical distance is between the two modulation formats, the technology usually adopts a lower-end modulation format to ensure the reliability of information transmission, but it will inevitably reduce the effectiveness of information transmission. For example, assume that for a single QPSK and 16QAM modula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/16H04J14/02H04Q11/00H04L27/32
Inventor 沈纲祥代华王晓玲李泳成
Owner SUZHOU UNIV
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