Josef Vojtech,

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Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems
www.cesnet.cz
czechlight.cesnet.cz

• Josef Vojtech,
• Stanislav Šíma, Lada Altmannová, Miloslav Hula,
• Jan Radil, Pavel Škoda

vojtech (zavinác) cesnet (tecka) cz
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Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems
Authors participate on following projects
Large infrastructure CESNET (www.cesnet.cz), GÉAN
T, GN3 (www.geant.net) Presented content
dont necessarily represent an official opinion
of mentioned institutions and projects
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Outline
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Fibers Sharing
• Motivations
• Possible Approaches
• Spatial Multiplex
• Wavelength Multiplex
• Open Transmission Systems
• Photonic Transmission (incl. Real-time)
• Conclusions
• QA

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Fibers Sharing - Motivations
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Fibers sharing more transmission systems in
  operation over single fiber par
• Why!?
• Demand for additional lambdas (incl. non-data
  with own supervisory channel)
• Simply no free fibers left
• New ground cable installation is expensive
• (e.g. 60 EUR/m in rural areas 1)
• 1 S. Sima et al. Deliverable D3.2v3 of Porta
  Optica project Economic analysis, dark fibre
  usage cost model and model of operations
  http//www.porta-optica.org/publications/POS-D3.2_
  Economical_analysis.pdf

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Fibers Sharing Motivations Cont.
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Economical solution - although in case of fibers
  rental
• Annualized average cost of fiber rental
• cf 0.5 EUR/m/year 1
• Annualized costs of transmission system (10Gbps)
  1
• ct 0.12 EUR/m/year for proprietary system
• ct from 0.035 to 0.047 EUR/m/year for open
  systems
• Obviously 2.ct cf lt 2.ct 2.cf

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Fibers Sharing Possible Approaches
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Spatial Multiplex
• Inter fiber
• Two single fiber bidirectional systems
• Intra fiber
• Few mode fiber
• Multicore fiber
• Wavelength Multiplex
• Band based
• Sub-band based
• Interleaved
• Free allocation of spectrum

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Fibers Sharing Spatial Multiplex
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Inter Fiber
• Two single fiber systems, each over one fiber
• Excellent systems isolation
• Limited to 2 systems

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Fibers Sharing Single Fiber Transmission
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Sharing of single fiber between directions
  typically on wavelength base
• Proven technology, commercially available and in
  operation
• In CESNET2 over 905km of single fiber with DWDM
  system
• Transmission system price increase
• Less than 0.0015 EUR/m/year 1

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Sharing of Fibers by Transmission Systems
http//www.ces.net/netreport/CESNET2_IP_MPLS_backb
one_utilization/Plzen20-3E20Cheb/index.html
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Fibers Sharing Spatial Multiplex
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Intra Fiber
• Few mode fiber (3, 5,...)
• Multicore fiber
• Still under development known issues
• xtalk, coupling/decoupling, splicing,
  connectors, amplification (EDFA/Raman)

source C. Koebele et al. 40km Transmission of
Five Mode Division Multiplexed Data Streams at
100Gb/s with low MIMO-DSP Complexity, ECOC 2011
PDP Th.12.C3
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Fibers Sharing Wavelength Multiplex
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Wavelength Multiplex
• Band based
• Sub-band based
• Interleaved
• Free allocation

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Wavelength Multiplex
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Based on whole transmission bands
• Single vendor - C and L proven, S still limited
• Arrangement of management channels
• Interaction through Raman scattering

Source Cisco
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Wavelength Multiplex
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Sub-band based
• Interleaved
• Free allocation
• Arrangement of management channels complicated
• Interaction XPM and FWM, vs. guard-bands

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Open Photonic Transmission Systems
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Free (SW) freedom to use, study or modify not
  necessarily for free
• Open (SW) openness for community development,
  freedom of redistribution
• Differences small, but not exactly same classes
• Commercial SW proprietary or free (e.g. Red
  Hat)
• Free/Open source hardware
• Designed and offered in the same way as SW

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Open Photonic Transmission Systems
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Obvious success of open/free SW
• Open/free approach in networking exists
• Plenty of smaller project, e.g. open routers
• Big players - Network OS JUNOS (based on Free
  BSD) opened in 2007
• Open transmission system developed in CESNET
• Open transmission system
• Owner/operator can system actively modify and
  improve - fast development of new
  features/services
• Freedoms preserved
• Freedom to use on own, study or modify

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Photonic Transmission Services
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• To allow also non-data transmissions
• To support true real time applications
• Low and fixed latency propagation only
• Preferably no OEO

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Photonic Transmission Services
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• High performance and high speed data transmission
  need not to be real-time. Real-time has to do
  with timeliness constraints
• Present network usually support non-real-time
  services, i.e. no timeliness constraints are
  defined
• Examples (best-effort not acceptable)
• Real time system control in industry and
  transport, vehicle control
• Radio frequency over fibre (signals from radio
  locator, sonar, etc.)
• Remote instrument control, telescope control
• HD Videoconferencing and multicast with quality
  guaranty
• Real time earthquake monitoring and emergency
  networks

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Photonic Transmission Services
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Examples
• Multi-channel low-latency video transmissions
  for 4K/2K and 3D HD applications in medicine,
  engineering (CAVE-to-CAVE) and audiovisual
  processing
• Surgery broadcast
• http//www.ces.net/doc/press/2010/pr100304.html
• Remote robotic surgery (da Vinci robot) -
  distance 130 km, delay less 1 ms, truly real-time
  3D Full HD stereo broadcast
• http//www.ces.net/doc/press/2010/pr100618.h
  tml

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Photonic Transmission Services
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Precise time transfer - comparison of atomic
  clock scales
• Prague (UFE) and Vienna (BEV)
• Distance 520 km, accuracy under 1 ns
• (1 ns 30 cm in vacuum or 20 cm in fibre)?
• http//www.pttimeeting.org/archivemeetings/2010pap
  ers/paper33.pdf
• http//www.ces.net/doc/press/2010/pr100401.html

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Precise Time Transfer Demo
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems
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Conclusions
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Fibre sharing works with some proprietary
  systems from one vendor (CL)
• Need to verify it for different vendors
• Open system are suitable candidate (OO, OP)
• Photonic services operational
• Development and accuracy improvement

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Acknowledgement
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Jan Gruntorád, Miroslav Karásek, Martin Míchal,
  Jan Nejman, Václav Novák, Karel Slavícek,
  Vladimír Smotlacha

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Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• Thank You for kind attention!Questions?
• vojtech (zavinác) cesnet (tecka) cz

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References 1
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• 2 Petr Holub, Josef Vojtech, Jan Radil, et.
  al., Pure Optical (Photonic) Multicast, GLIF
  2007 Demo, Prague, 2007.
• 3 Jan Radil, Stanislav Šíma, Customized
  Approaches to Fibre-based E2E Services, TERENENA
  1st E2E Workshop, Amsterdam, 2008.
• 4 Stanislav Šíma, et. al., LTTx Lightpaths
  to the application, From GOLEs to dispersed end
  users , GLIF 2008 Workshop, Seattle WA, 2008.
• 5 Josef Vojtech, Jan Radil, Transparent all
  optical switching devices in CESNET, 25th APAN
  meeting, Honolulu HI, 2008.
• 6 Radil J., Vojtech J., Karásek M., Šíma S.
  Dark Fibre Networks and How to Light Them, 4th
  Quilt Optical Networking Workshop, Fort
  Lauderdale FL, 2006.

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References 2
Sharing of Fibers by Transmission Systems Open
Photonic Transmission Systems

• 7 czechligh.cesnet.cz, Publications
• 8 Global Lambda Integrated Facility,
  http//www.glif.is
• 9 Vojtech J., CzechLight and CzechLight
  amplifiers. In 17th TF-NGN meeting, Zurych,
  Switzerland, April 2005