Computing method for simulating value of optical signal to noise ratio (OSNR) of pre-built transmission network

A calculation method and transmission network technology, which are applied in the field of calculation of OSNR analog values ​​of pre-built transmission networks

Active Publication Date: 2016-05-25
陈骋
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Therefore, this method is only suitable for senior designers with many years of work experience, and the results estimated by this method only have some reference value for the

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  • Computing method for simulating value of optical signal to noise ratio (OSNR) of pre-built transmission network
  • Computing method for simulating value of optical signal to noise ratio (OSNR) of pre-built transmission network
  • Computing method for simulating value of optical signal to noise ratio (OSNR) of pre-built transmission network

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[0042] Example 1, Figure 1 ~ Figure 6 A calculation method for the OSNR simulation value of the pre-built transmission network is given, which can quickly obtain the OSNR simulation value of the pre-built OTN system.

[0043] According to the ITU-TG.692 document, if the noise figure, gain and attenuation value of each optical amplifier section of all cascaded EDFA optical amplifiers in the link are the same, the OSNR calculation formula is as follows:

[0044] R out =P in -F-10lgN-10lg(hνB 0 )

[0045] =P out +L-F-10lgN-10lg(hνB 0 )(1)

[0046] Where:

[0047] R out Is the light output signal-to-noise ratio (dB); P in Is the amplifier input power (dBm); F is the amplifier noise figure (dB); N is the number of amplifiers; h is the Planck constant; v is the signal frequency; B 0 Is the optical broadband (usually in the 1550nm OTN system, when the optical bandwidth is 0.1nm, 10lg(hνB 0 )=-58dBm).

[0048] Since the F, G, and L defined in the formula (1) are all the same, the conditions a...

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Abstract

The invention discloses a computing method for the simulating value of the optical signal to noise ratio (OSNR) of a pre-built transmission network. The computing method comprises a data acquisition step and a computing step. The data acquisition step comprises the following sub-steps of acquiring the actual gain parameters and noise coefficients of previous projects; setting an actual gain-noise relation curve according to the actual data of the previous projects; acquiring a current gain-noise relation curve according to the actual gain-noise relation curve; and calculating a current incident optical power parameter and a current equipment attenuation allowance parameter according to the actual incident optical power parameters and the current equipment attenuation allowance parameters of the previous projects. The computing steps comprises the sub-step of computing an optical output SNR via the current incident optical power parameter, wherein a current gain parameter is acquired through computing by using the current incident optical power parameter, the current equipment attenuation allowance parameter and an optical fiber attenuation parameter; a current noise coefficient which is an unknown quantity during the computation process of the optical output SNR is acquired via the current gain-noise relation curve.

Description

technical field [0001] The invention relates to a method for calculating OSNR, in particular to a method for calculating an OSNR simulation value of a pre-built transmission network. Background technique [0002] With the rapid development of Internet services, the transmission networks of China Unicom, China Mobile and China Telecom are facing increasing pressure. The traditional synchronous digital system (SDH, Synchronous Digital Hierarchy) and wavelength division multiplexing (WDM, Wavelength Division Multiplexing) transmission The system has been unable to meet the bearing requirements of massive high-speed services. Optical Transmission Network (OTN, OpticalTransmissionNetwork) technology has both the advantages of SDH and WDM, and has become the most mainstream transmission network technology at present. At the same time, OTN technology is also constantly evolving, and the transmission bandwidth ranges from single-wavelength 10Gb / s to 40Gb / s, and then single-waveleng...

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Application Information

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IPC IPC(8): H04B10/079H04L12/26
CPCH04B10/07953H04L43/08
Inventor 陈骋
Owner 陈骋
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