Optical Networks and eVLBI Bill St. Arnaud
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Transcript of Optical Networks and eVLBI Bill St. Arnaud
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CANARIE Inc.- Overview
• Federal leadership: Concept born in 1990 out of Industry Canada discussions
• Founding: Incorporated in 1993 by industry and academia
• Funding: From Industry Canada: For networks and research applications from Canadian Heritage, HRDC, Health Canada
• Mission: To facilitate development and use of Canada’s advanced communications infrastructure
• Primary stakeholders: Government Departments, universities, provincial research networks, broader research community, colleges, carriers, IT sector, SMEs, broader education sector, broader health sector, provinces
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CA*net 4 DriversApplication Specific Networks
> Soon high end grid applications will have sufficient traffic volume to require their own underlay networks ”Complementing” routed networks – Not a replacement for routed networks – only increasing the direct
peering mesh of the routed network for specific applications– But peering may be more dynamic (and not globally advertised) than
traditional IP BGP peering> Discipline or applications specific networks
– VBLI grids like European EVN – High energy physics grid – Ultralight– NEES grid, Bio-informatics Grid, etc
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eVLBI driving network architectures
> MERLIN in UK links several radio dish sites with optical fiber network
> European EVN and LOFAR will built around optical lightpaths on GEANT network
> In Canada eVLBI is mostly used for Geodetic applications– GPS corrections– Measuring movement of Canadian shield
> DRAO (astronomical dish) will be soon connected to CA*net 4 network so that they can participate in global eVLBI
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S2 VLBI Space Observatory
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Example – EVN traffic flows over GEANT
UK
SE
FR
NLBE
DE1DE2
CZ
PL
CH
IT
AT
SURFnet
JANET
GARR
PSNCDFN
NORDUnet
2.5G10G
JIVE
Provided courtesy of Dai Davies
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Issues
> How do you charge for bandwidth and usage when single application traffic dwarfs all other IP traffic?
> Possible solutions:1. GMPLS (with QoS)
• Requires expensive routers and complex coordinated central management to setup and tear down tunnels
• Interdomain still unproven2. Optical overlay/underlay –ASON
– same problems as GMPLS3. Application specific UCLP networks
– Increase BGP mesh for specific applications or disciplines
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UCLP applied to EVN
UK
SE
FR
NLBE
DE1DE2
CZ
PL
CH
IT
AT
SURFnet
JANET
GARR
PSNCDFN
NORDUnet
JIVE
EVN sites will see 2 BGP routes to SURFnet:-the normal IP route over GEANT-Express route using dedicated lightpaths (in green)
Express route
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What is UCLP?
> User Controlled LightPaths – a configuration and provisioning tool built around web services
> Third party (e.g. eVLBI) can concatenate cross connects together from various networks to produce a wide are network that is under their control– Articulated Private Network (APN)
> Uses Service Oriented Architecture (SOA) and so network can be integrated with other web service applications such as instruments and software correlators
> Allows eVLBI users to change configuration and topology of the optical network to meet research needs
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GLIF links
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Recommended Browsing
> UCLP Roadmap Document– http://www.canarie.ca/canet4/uclp/UCLP_Roadmap.doc
> LOOKING– http://lookingtosea.ucsd.edu/
> NEESgrid Tele-Operation Network Protocol– http://it.nees.org/documentation/pdf/TR-2004-23.pdf
> Common Instrument Middleware Architecture– www.instrument-middleware.org
> EU GridCC– http://www.canarie.ca/conferences/advnet2004/ppt/maron.ppt
> CABA open building interexchange web services for high voltage AC and building management systems– http://www.caba.org/councils/obix.html