UDWDM PON is a leading technology oriented to provide ultra-high bandwidth to final users while profiting the physical channels' capability. One of the main drawbacks of UDWDM technique is the fact that the nonlinear effects, like FWM, become stronger due to the close spectral proximity among channels. This work proposes a model for the optimal deployment of this type of networks taking into account the fiber length limitations imposed by physical restrictions related with the fiber's data transmission as well as the users' asymmetric distribution in a provided region. The proposed model employs the data transmission related effects in UDWDM PON as restrictions in the optimization problem and also considers the user's asymmetric clustering and the subdivision of the users region though a Voronoi geometric partition technique. Here it is considered de Voronoi dual graph, it is the Delaunay Triangulation, as the planar graph for resolving the problem related with the minimum weight of the fiber links.
The continued increase in the capabilities and performance in fiber optic networks today require more robust network designs to allow high consumption of information and thus enable users to have greater capacity and data content. That's why we in the task of analyzing and implementing the concept of flexible optical networks to optimize the use of bandwidth at high transmission rates and improved spectral efficiency, which represents the industry an effective economy, and energy.
This article analyzes the current state of green technologies in optical telecommunications networks, analyzing in detail the basic structure of a hybrid network (Optical-Wireless), taking into account energy consumption by proposing a mathematical model is presented to establish the optimum number of ONUs in a network.
KEYWORDS: Optical networks, Internet, Fiber to the x, Televisions, Video, Signal to noise ratio, Optical amplifiers, Polarization, Eye, Signal processing
The convergence of new technologies in the digital world has made devices with internet connectivity such as televisions, smatphone, Tablet, Blu-ray, game consoles, among others, to increase more and more. Therefore the major research centers are in the task of improving the network performance to mitigate the bottle neck phenomenon regarding capacity and high transmission rates in information and data. The implementation of standard HbbTV (Hybrid Broadcast Broadband TV), and technological platforms OTT (Over the Top), capable of distributing video, audio, TV, and other Internet services via devices connected directly to the cloud. Therefore a model to improve the transmission capacity required by content distribution networks (CDN) for online TV, with high-capacity optical networks is proposed.
The increasing demand of network traffic requires new research centers; improve their communications networks, due to
the excessive use of mobile and portable devices wanting to have greater access to the network by downloading
interactive content quickly and effectively. For our case analyze optical network link through simulation results
assuming a DWDM (Dense wavelength Division Multiplexing) optical link, considering the nonlinearity phenomenon
FWM (Four Mixed Wavelength) in order to compare their performance, assuming transmission bit rates to 2.5 Gbps and
10 Gbps, using three primary wavelengths of 1450 nm, 1550 nm and 1650 nm for the transmission of information,
whose separation is 100 GHz to generate 16 channels or user information. Tests were conducted to analyze optical
amplifiers EDFAs link robustness at a maximum distance of 200 km and identify parameters OSNR, SNR and BER, for
a robust and effective transmission
One of the main issues in the WDM PON networks design is the optimal dimensioning of the network. The
network size usually depends on the traffic demand and the user density, taking in to account the active and
passive equipment capacity and some physical layer constraints like the attenuation in the optical path. However,
some physical layer limitations related with signal transmission in an optical fiber become more relevant in a
WDM transmission and when operating at very high data rates, like 10 Gbps or beyond. In this paper we propose
a novel physical layer restrictions based integer linear programming (ILP) model for greenfield next generation 10
Gbps WDM PON network design. The results of the model are validated by means of computational techniques.
The proposed ILP model takes into account not only the attenuation of the signal in the optical path but also,
through the use of the data obtained by simulation software. We take in to account the restrictions imposed
by other phenomena like dispersion, cross talk and some non linear effects typically present in a dense WDM
optical transmission.
The increased bandwidth required by applications, tends to raise the amount of optical equipment, for this reason, it is
essential to maintain a balance between the wavelength allocation, available capacity and number of optical devices to
achieve the lowest power consumption. You could say that we propose a model that minimizes energy consumption,
using unicast / multicast traffic grooming in optical networks.
KEYWORDS: Optical amplifiers, Raman spectroscopy, Radio optics, Radio over Fiber, Signal to noise ratio, Hybrid fiber radio, Optical fibers, Modulation, Optical simulations, Passive optical networks
This paper we analyzed three alternatives for optical amplification used to extend the reach of optical
fiber link for the transport of RoF (Radio over Fiber) in view of 54 MHz RF signals for wireless
applications.
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