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Evaluation of Wavelength Requirements for Stratospheric Optical Transport Networks

Mohorcic , Mihael and Fortuna , Carolina and Vilhar, Andrej and Horwath, Joachim (2009) Evaluation of Wavelength Requirements for Stratospheric Optical Transport Networks. Journal of Communications, Vol 4 (No 8 ), pp. 588-596. ACADEMY PUBLISHER. DOI: 10.4304/jcm.4.8.588-596. ISSN 1796-2021.

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Official URL: http://www.academypublisher.com/ojs/index.php/jcm/article/viewArticle/0408588596

Abstract

This paper addresses the concept of optical transport network based on high altitude platforms (HAPs) flying in lower stratosphere and equipped with optical communications payload. The stratospheric transport network is formed of optical links between HAPs and optical backhaul uplinks and downlinks between HAPs and ground stations (GSs) hosting gateways to the backbone network. In order to consider limitations of free space optics (FSO) for the dimensioning of stratospheric optical transport network (OTN), we investigate the physical layer aspects for a DWDM based optical interplatform link (IPL). Taking into account the physical constraints imposed by FSO, we estimate the number of wavelengths required for full interconnectivity without wavelength conversions. We are using an analytical approach for bus and full mesh regular topologies, and a numerical approach for circumcircled star, ring and star regular topologies. We also evaluate the performance of a representative network with irregular topology using different routing and wavelength assignment algorithms. We show that the number of wavelengths needed to achieve full interconnectivity strongly depends on the physical topology of the network, and that adaptive routing yields better overall performance of the network compared to fixed and fixed alternate routing. The analysis also shows that resources in realistic network topologies tend to be used very inefficiently, which could be improved by traffic engineering solutions or wavelength conversions.

Document Type:Article
Title:Evaluation of Wavelength Requirements for Stratospheric Optical Transport Networks
Authors:
AuthorsInstitution or Email of Authors
Mohorcic , MihaelUNSPECIFIED
Fortuna , CarolinaUNSPECIFIED
Vilhar, Andrej UNSPECIFIED
Horwath, Joachim joachim.horwath@dlr.de
Date:September 2009
Journal or Publication Title:Journal of Communications
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:Vol 4
DOI:10.4304/jcm.4.8.588-596
Page Range:pp. 588-596
Editors:
EditorsEmail
Mohorcic, Mihael UNSPECIFIED
Fortuna, Carolina UNSPECIFIED
Vilhar, Andrej UNSPECIFIED
Horwath, Joachim joachim.horwath@dlr.de
Publisher:ACADEMY PUBLISHER
ISSN:1796-2021
Status:Published
Keywords:free space optics (FSO), high altitude platforms (HAPs), DWDM, optical interplatform link (IPL)
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Digital Networks
Deposited By: Joachim Horwath
Deposited On:27 Apr 2010 08:18
Last Modified:16 Jul 2013 03:02

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