Bandwidth Scheduling Methods for the Upstream Traffic in Passive Optical Networks

Bosternák, Z.; Róka, Rastislav

doi:10.15199/48.2018.04.03

Cited by 7 publications

(14 citation statements)

References 7 publications

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“…The first option is to add more channels to the system, though that would result in the increase of the whole work spectrum which can already be exhausted because the majority of the components operate only within a limited spectrum. The second method is the decrease of gaping between channels, e.g., 100 GHz, 50 GHz, 25 GHz, to 12.5 GHz [11,12]. The last solution would be to increase the data speed of individual channels.…”

Section: Cwdm/dwdm the Fusion Of Wave Multiplexes Wdmmentioning

confidence: 99%

“…In the technical terminology such systems could be found under "The hybrid transfer systems 10G/40G" or "mix 10G/40G." According to the recommendation ITU-T G.696.1 the majority of fully optical communication systems work with a transfer speed of 10 Gbit.s −1 using NRZ (Nonreturn to Zero) with gaping of 50 GHz or 100 GHz [11]. Because considerable finances have been devoted to the construction of systems with a transfer speed of 10 Gbit.s −1 , uprooting the entire system for something newer would be very costly.…”

Section: Cwdm/dwdm the Fusion Of Wave Multiplexes Wdmmentioning

confidence: 99%

“…At the mentioned transit the BER is increased 16 times, caused by the chromatic dispersion, squaring the speed multiple. The value of chromatic dispersion at the speed of 10 Gbit.s −1 is tolerated by NRZ to 1000 ps/nm/km, whereas for the speed of 40 Gbit.s −1 it is only 60 ps/nm/km [11,13]. That implies that, with the increase of transfer speed, dispersion compensation is necessary if not indispensable.…”

Section: Cwdm/dwdm the Fusion Of Wave Multiplexes Wdmmentioning

confidence: 99%

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Suppression of Nonlinear XPM Phenomenon by Selection of Appropriate Transmit Power Levels in the DWDM System

Ivaniga

2019

International Journal of Optics

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In the 21st century, it is not possible to implement fully optical communication systems without software tools to test the system for all unwanted phenomena occurring during real-time operation. With ever-increasing transmission rate and low latency, nonlinear phenomena are associated with higher power levels and smaller spacing between channels began to appear in OFs (optical fibers). This paper aims to implement a four-channel DWDM (Dense Wavelength Division Multiplex) system on which the nonlinear XPM (cross-phase modulation) phenomenon will be investigated. At the output of the system, we will eliminate the phenomenon (partially suppressed) by the appropriate choice of transmitting power levels (power levels operating at 193,025 THz to 193,175 THz) when the OF is dispersed. In optical transfer data systems a system is functioning if the measured BER parameter is not bigger than 10−12.

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Section: Cwdm/dwdm the Fusion Of Wave Multiplexes Wdmmentioning

confidence: 99%

Section: Cwdm/dwdm the Fusion Of Wave Multiplexes Wdmmentioning

confidence: 99%

Section: Cwdm/dwdm the Fusion Of Wave Multiplexes Wdmmentioning

confidence: 99%

See 1 more Smart Citation

Suppression of Nonlinear XPM Phenomenon by Selection of Appropriate Transmit Power Levels in the DWDM System

Ivaniga

2019

International Journal of Optics

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show abstract

“…In the technical terminology such systems could be found under "The hybrid transfer systems 10G/40G" or "mix 10G/40G". According to the recommendation ITU-T G.696.1 the majority of fully optical communication systems work with a transfer speed of 10 Gbit.s -1 using NRZ (Non-Return to Zero) with gaping of 50 GHz or 100 GHz [13][14][15]. Because considerable finances have been devoted to the construction of systems with a transfer speed of 10 Gbit.s -1 , uprooting the entire system for something newer would be very costly.…”

Section: Fusion Of Cwdm/dwdmmentioning

confidence: 99%

“…The equations (13) and (14) assumed that NF and Г do not change. Using ROA the OSNR is defined for level i as: , (15) where GRA represents the agent raising OSNR when using ROA (raman Optical Amplifier).…”

Section: Creation Of the Eye Diagrammentioning

confidence: 99%

Untitled

2019

JESTR

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The continual increase in transfer capacity and speed leads to the continual improvement of fully optical transfer communication systems. The aim of this article is to present the creation of an 8-channel CWDM (Coarse Wavelength Division Multiplex) system (gap spacing of 20 nm), where 10 channels, with gaps of 2 nm are gradually inserted between wavelengths of 1530 nm to 1550 nm according to the ITU-T G.694.1 recommendation. This system is evaluated using the BER (Bit Error Rate) of a specific channel operating on a wavelength of 1540 nm. In the topology we used an EDFA (Erbium Doped Fibre Amplifier) placed In-Line at 90 km with a bit speed of 10 Gbit.s-1. Consequently, in order to overcome the problem of distance, an optical loop with an appropriate EDFA configuration was created. This article presents the basic mathematical description of bit error rate and also deals with the possibility of the incorporation of CWDM and DWDM systems into existing infrastructures.

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Analysis of the energy efficiency in the future NG-PON networks utilizing the WDM technology

Róka,

Lichý

2024

AIP Conference Proceedings

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Bandwidth Scheduling Methods for the Upstream Traffic in Passive Optical Networks

Cited by 7 publications

References 7 publications

Suppression of Nonlinear XPM Phenomenon by Selection of Appropriate Transmit Power Levels in the DWDM System

Suppression of Nonlinear XPM Phenomenon by Selection of Appropriate Transmit Power Levels in the DWDM System

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Analysis of the energy efficiency in the future NG-PON networks utilizing the WDM technology

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