Josef Vojtěch Lada Altmannová, Miloslav Hůla, Jan Radil Stanislav Šíma, Pavel Škoda

Josef Vojtěch Lada Altmannová, Miloslav Hůla, Jan Radil

Stanislav Šíma, Pavel Škoda

www.cesnet.cz

R&E Network in the Czech RepublicSingle Fibre Bidirectional Transmission

czechlight.cesnet.cz

vojtech (zavináč) cesnet (tečka) cz

7. dubna, 2011 WDM Systems Summit 2011 2

Authors participate on following projects:

Large infrastructure CESNET (www.cesnet.cz),

GÉANT, GN3 (www.geant.net),

Presented content don’t necessarily represent an official opinion of mentioned institutions and projects



Outline

CESNET introduction

Concepts used

CESNET2, used DWDM

Single fibre transmission

Open WDM – CL family

New concepts Photonic services Real-time services

Acknowledgement

Q&A



R&E Network in the Czech Republic

CESNET

CESNET - Czech Educational and Scientific NETwork

Established 1996 as non-profit organisation, association of legal entities

Public universities and Academy of sciences

It operates:

National research and educational network – CESNET2

Experimental facility – CzechLight


Dark Fibers (DF), since 1999

Nothing in Line approach (NIL), since 2002

Single fibre bidirectional transmission, since 2002

Cross Border Fibres (CBF), since 2003

Open transmission system, since 2004


Concepts Used


CESNET 1999 – 2007

R&E Network in the Czech Republic CESNET2 Development

2000 2002 2004

2005 2007


R&E Network in the Czech Republic CESNET2


DWDM transmission sytems

Proprietary (commercial) system, since 2004

Open system – CL family, since 2005

Single fibre, open system, since 2008

R&E Network in the Czech Republic DWDM in CESNET2


R&E Network in the Czech Republic DWDM in CESNET2

Transmission layer – coexistence and interoperability of proprietary and open DWDM system

Proprietary DWDM – 1410km of dark fibre

Open DWDM system – 2660km of dark fibre

Including 905km single fibre lines with bidirectional DWDM transmission


R&E Network in the Czech Republic Single Fibre Transmission

+ Price of single fibre leasing is about 60% of fibres pair+ Second fibre to be added (and paid) once it is truly necessarry+ Can solve lack of fibres on some lines+ Works fine with WDM, excellently with Open WDM http://www.cesnet.cz/doc/tisk/2011/tz110317.html+ Tested in EF and CESNET2+ Available also as a lit fibre service

Our providers of lit fibre services ČD-Telematika, a.s. Tűrk Telecom (Pantel International CZ

s.r.o.) Sloane Park Property Trust a.s.

CESNET licences for Open WDM - CL family equipment obtained by RLC Praha a.s. and Optokon Co., Ltd, spol. s r.o.

CESNET licences are available for others


Photonic services

Fibre sharing

http://www.ces.net/netreport/CESNET2_IP_MPLS_backbone_utilization/Plzen%20-%3E%20Cheb/index.html



R&E Network in the Czech Republic Open WDM Devices in Operation

CESNET2 and CBFs Number of CLA Length (km)

20 lines including 41 2 660

8 single fibre lines16 CLA +

2 x CL ROADM 905

3 fibre pair of CBF 7 521

CESNET EF Number of CL devices Length (km)

3 lines8 x CLA +

2 x CL VMUX 760

Multicast on Demand Fibre Switches

CLS/M 8x8 and16x16 - Switching, multicasting or monitoring applications with variable ratios

R&E Network in the Czech RepublicOpen WDM + Latest Development

1

16

1

16

IN OUTTX 4k

TX 8k

RX 4k

RX 4k

RX 8k

RX 8k

RX 8k

50%

50%

33%

33%

33%

Amplification: CLA, CLR

CD compensation: CLC

Fibre switching, without or with multicast: CLS, CLM

Lambda switching: VMUX, ROADM

1

16

1

16

IN OUTTX 4k

TX 8k

RX 4k

OSNR

RX 8k

OSNR

Res CD

90%

5%

90%

5%

5%

R&E Network in the Czech RepublicLatest Development

Traditional Necessary

Dynamic spectra allocation: CL DS-WSS

50 GHz grid is standard (80 channels on C band), but it is difficult or impossible to fit there some 40 Gbps channels (NRZ, DPSK,…)

100 Gbps channels need complicated modulation format e.g. DP-DQPSK, it means more complicated, expensive and power hungry TX and RX

400G or 1T channels – very complicated TX and RX, not possible to work over 50 GHz grid, different modulations and bandwidth for metro and long haul

CL Colourless ROADM, degree 4

Expandable up to 8 directions

Touchless lambda provissionng, each lambda

can be routed in any direction

1T LH 1T metro100G



New Concepts – Fibre SharingSharing of fibre pair by more transmission systems:

Long haul fibres are expensive

No free pairs available

Division in space – e.g. two 1 fibre bidirectional systems

Division in spectrum Band based - e.g. C/L band

Sub-band based – odd/even channels or red/blue sub-band

To be solved: transparent all-optical wavelength conversion to minimize blocking probability



New concepts – Photonic ServicesCESNET suggested Photonic services in future GEANT network

To allow non-data transmissions

To support „real time“ applications

Transparency (partial) – for future development

Low and fixed latency – propagation only



Photonic Services - DemonstrationExperiment „Highly accurate time transfer“ comparison of atomic clock scales between Prague and Vienna (distance about 520 km). Accuracy under 1 nanosecond was achieved (1 ns corresponds to 30 cm light path in vacuum or about 20 cm in fibre). Involved national time and frequency labs in Prague and Vienna: IPE (Institute of Photonics and Electronics of Academy of Sciences of the Czech Republic) and BEV (Bundesamt für Eich- und Vermessungswesen),Involved equipment: Open DWDM systemsPress release “A new method of accurate time signal transfer demonstrates the capabilities of all-optical networks” http://www.ces.net/doc/press/2010/pr100401.html



Photonic Services - Demonstrations

Multi-channel low-latency video transmissions for 4K/2K and 3D HD applications in medicine, engineering (CAVE-to-CAVE) and audiovisual processing (http://www.ces.net/project/qosip/hw/mvtp-4k.pdf)Surgery demonstration for conference: live broadcast of minimally invasive thyroid surgery, watched by the participants of the Stresovice Spring 2010 – an international medical discussion forum held on 4th March in Prague by the Otorhinolaryngology Clinic of the Third Faculty of Medicine of Charles University in Prague, in collaboration with the Central Military Hospital in Prague, see : http://www.ces.net/doc/press/2010/pr100304.html Remote demonstration of a kidney surgery by robotic instrument (da Vinci robot) from the Masaryk Hospital in Ústí nad Labem to the Prague (about 130 km by fibre). Signal delay along the transmission stream was less than 1 ms, enabling a truly real-time 3D Full HD stereo broadcast, see http://www.ces.net/doc/press/2010/pr100618.html



Real Time Services, Expected Examples

Present network usually support non-real-time services, i.e. no timeliness constraints are defined.

For services with a guaranty of real-time constraints, the "best effort" principle is not acceptable.

High performance and high speed data transmission need not to be real-time. Real-time has to do with timeliness constraints.

Examples: 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

More details: http://www.ces.net/events/2010/cef/p/sima.ppt


R&E Network in the Czech Republic Acknowledgement

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



Thank You for kind attention!

Questions?

vojtech (zavináč) cesnet (tečka) cz


[1] Petr Holub, Josef Vojtech, Jan Radil, et. al., „Pure Optical (Photonic) Multicast“, GLIF 2007 Demo, Prague, 2007.

[2] Jan Radil, Stanislav Šíma, „ Customized Approaches to Fibre-based E2E Services“, TERENENA 1st E2E Workshop, Amsterdam, 2008.

[3] Stanislav Šíma, et. al., „ LTTx: Lightpaths to the application, From GOLEs to dispersed end users “, GLIF 2008 Workshop, Seattle WA, 2008.

[4] Josef Vojtěch, Jan Radil, „Transparent all optical switching devices in CESNET“, 25th APAN meeting, Honolulu HI, 2008.

[5] Radil J., Vojtěch J., Karásek M., Šíma S.: Dark Fibre Networks and How to Light Them, 4th Quilt Optical Networking Workshop, Fort Lauderdale FL, 2006.

R&E Network in the Czech Republic References 1


[6] www.seefire.org, Deliverables

[7] czechligh.cesnet.cz, Publications

[8] Global Lambda Integrated Facility, http://www.glif.is

[9] Vojtěch J., „CzechLight and CzechLight amplifiers“. In: 17th TF-NGN meeting, Zurych, Switzerland, April 2005

R&E Network in the Czech Republic References 2

Date post:	15-Jan-2016
Category:	Documents
Upload:	max
View:	44 times
Download:	0 times

Josef Vojtěch Lada Altmannová, Miloslav Hůla, Jan Radil Stanislav Šíma, Pavel Škoda

Documents