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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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.
|Title:||Evaluation of Wavelength Requirements for Stratospheric Optical Transport Networks|
|Journal or Publication Title:||Journal of Communications|
|In Open Access:||Yes|
|In ISI Web of Science:||No|
|Page Range:||pp. 588-596|
|Keywords:||free space optics (FSO), high altitude platforms (HAPs), DWDM, optical interplatform link (IPL)|
|HGF - Research field:||no assignement|
|HGF - Program:||no assignment|
|HGF - Program Themes:||no assignment|
|DLR - Research area:||no assignement|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||other|
|Institutes and Institutions:||Institute of Communication and Navigation > Digital Networks|
|Deposited By:||Joachim Horwath|
|Deposited On:||27 Apr 2010 08:18|
|Last Modified:||07 Feb 2013 20:47|
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