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Communication Black Holes in Ground Segment Networks

Szücs, Gabor and Maly, Stefan and Peinado, Dr. Osvaldo (2012) Communication Black Holes in Ground Segment Networks. SpaceOps2012, 11.-15.6.2012, Stockholm, Schweden.


Official URL: http://www.spaceops2012.org/proceedings/proceedings.html


The ISS Columbus Ground Segment is a complex MPLS-based WAN communication network witch connects sites located in USA (NASA), Russia (RSA), France (ATV-CC), Germany (COL-CC) and several user centres across Europe (network consists of more than 17 sites). For the communication between the different control centres and facilities a proprietary network is used. This network is called IGS (International/interconnected Ground Segment). The Columbus IGS WAN was migrated - in 2007/2008 - from ATM/ISDN-technology using presently MPLS as network communication platform. The change in the technology used for the network communications implied big changes in the concept used to support operations. The migration from ATM/ISDN to MPLS reduced the communication costs and a made a new technology available, but implied also new challenges while delivering quality assured end-to-end operational services. Here we would like to address one challenge resulting from the usage of complex network communication structures and protocol interactions in the MPLS backbone network that may result in complete “silent” outages of communication between various sites. The silent outages also called “black holes” are outages that are not discovered by the “normal” network monitoring tools as the network and physical layers are still operational. Communication “black holes” in most cases are not seen by network monitoring instances – therefore their detection, localization and elimination is a time consuming process needing often also manual intervention correcting them. For critical operations they represent a risk that needs to be addressed. In this article we will present the reasons why such outages occur together with their effect on network availability and operations. We also describe how such events can be detected and - in case of redundant sites - automatically bypassed. The presented procedures and event avoidance is IGS-WAN network specific but the experience gained here can definitely be implemented in other proprietary networks.

Item URL in elib:https://elib.dlr.de/76701/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Communication Black Holes in Ground Segment Networks
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Szücs, Gaborgabor.szuecs (at) dlr.deUNSPECIFIED
Maly, Stefanstefan.maly (at) dlr.deUNSPECIFIED
Peinado, Dr. Osvaldoosvaldo.peinado (at) dlr.deUNSPECIFIED
Date:11 June 2012
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:DLR, GSOC, ISS, MPLS, WAN, IGS, ATM/ISDN, migration, black holes, proprietary network,
Event Title:SpaceOps2012
Event Location:Stockholm, Schweden
Event Type:international Conference
Event Dates:11.-15.6.2012
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W SY - Technik für Raumfahrtsysteme
DLR - Research area:Space
DLR - Program:W SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):W - Vorhaben Infrastruktur und Unterstützung für Raumflugbetrieb (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > GSOC-German Space Operations Center
Deposited By: Pilgram, Martin
Deposited On:10 Aug 2012 11:41
Last Modified:31 Jul 2019 19:37

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