Jan Radil, Lada Altmannová, Stanislav Šíma, Josef Vojtěch - PDF

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Optical networking tests Research and experimentation with 40 and 100Gbps technology for GÉANT and NRENs Jan Radil, Lada Altmannová, Stanislav Šíma, Josef Vojtěch June 25, 2008 Plenary session,

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Optical networking tests Research and experimentation with 40 and 100Gbps technology for GÉANT and NRENs Jan Radil, Lada Altmannová, Stanislav Šíma, Josef Vojtěch June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 1 Optical networking tests Presented content is preliminary and do not necessarily reflect an official opinion of any institution or project. Authors participate on Optical networks activity of CESNET research program, see Further presentations and working documents of authors are available on czechlight.cesnet.cz. June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 2 Optical networking tests Outline Research and experimentation for GEANT and NRENs (including GN3 preparation) Understanding of physical layer is crucial in network design task 40 and 100 Gb/s transmission Test 1 40G Test 2 100G June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 3 Understanding of physical layer is crucial for future network design There is no networking without physical layer Technology used in physical layer limits transmission speed. Overcoming of distances, saving of energy, space and costs must be solved primarily in physical layer design. Big improvement possibilities are frequently not visible from digital layers (top-down approach is not sufficient) There is electronic processing speed limitation (about 100 Gb/s per port), optical processing speed limitation will be about 1 Tb/s per port. Optical processing has significantly lower energy consumption. June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 4 Main improvements of R&E networks physical layer In the past: dark fibres instead of telco services (although not in all lines) In the future: photonic devices instead of electronic devices (although not in all positions) In GN3, it should be task of SA1 Network Planning and Procurement preparation, but support of JRA needed (moreover, EU requests synergy between SAs, NAs and JRAs) June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 5 Network design for high speed multidomain e2e services Domains: GEANT, NRENs, MANs, campuses will be using different DWDM equipment OEO conversion needed for domain interconnection is expensive (especially, if domains are small) and limits transmission speed Photonic Integrated Circuits (PIC) used e.g. by Infinera help in part only (OEO is still present and PICs will not be used in all domains) How to achieve interoperability on optical level? How to achieve lower power consumption and save space and costs? We need at least: neutral FTTx (home run fiber is not used by incumbents because it is easier to regulate) knowledge of optics (what alien lambdas can domain accept?) verified by experimentation (technology testing) June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 6 Example of one NREN Fibre footprint km 4 470km CESNET2 (including 1 050km of single fibre lines) 740km of CESNET EF (Experimental Facility) Results: lambdas without OEO in CESNET2, 4 lines in CESNET EF and 3 lines in CESNET2 are lit by open photonic devices, 8 other lines will be lit in 2008, interoperability without OEO achieved Confirmation: Photonics approach to lighting is quite green : saving energy, housing space, travelling to huts and costs (more details tba) June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 7 June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 8 June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 9 No easy life above 10G wavelenght rate Interoperability on lambda level will be big issue in the future (different modulation formats, filtering, etc.) Legacy WDM systems usually strongly limits selections of effective modulation formats (narrow band filtering is limitation for alien lambdas) Active collaboration and pre-procurement with vendors is necessary Each vendor has the best solution for us, we strongly need vendor-independent knowledge verified by theoretical work and experiments in real environment What WDM we should ask for our fibre footprint (GEANT, NRENs, MANs, campuses)? June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 10 Introductory technology testing in JRA4 WI2 DJ4.2.2 remember testing received green light from EXEC DJ4.2.2 Feasibility study of planned 40/100Gbps optical transmission and advanced Ethernet tests Date of Issue: 06/09/07, Document Code: GN v7 Task 1: 40 and 100Gbps Transmission Testing Test 1: 40Gbps transmission Test 2: 100Gbps transmission Test 3: 40Gbps system evaluations Task 2: Advanced Ethernet Testing Test 2: High load testing of 10GE and VPLS at 10Gbps Main limitations: Topics accepted in GN2 Availability of very advanced equipment and components (quite different situation comparing to tendering for NRENs or GN2) Cost of some beta version offers impedes testing June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 11 Modulation formats mostly used in wavelength-division multiplexed (WDM) transmission systems Conventional: OOK (on-off-keyed, frequently denoted as amplitude-shiftkeyed ASK) signals in either nonreturn-to-zero (NRZ) or return-to-zero (RZ) format. The NRZ means that the optical signal is present during the whole bit interval, while the RZ format utilizes only a part (usually 33% or 50%) of the bit slot and CS-RZ (carrier suppressed RZ) utilizes usually 67%. Advanced: Some of these modulations carry information through on-off keying, but also modulate optical phase in a non-information bearing way in order to enhance the signals robustness to chromatic dispersion, optical filtering in long haul transmissions, and/or nonlinearities. This group includes formats such as optical duobinary (ODB), alternate mark inversion (AMI), chirped return-to-zero (CRZ), and alternate-phase (AP) ASK formats. Phase-shift-keyed (PSK) formats carry the information in the optical phase itself. Due to the lack of absolute phase reference in direct-detection receivers, the phase of the preceding bit is used as a relative phase reference for demodulation. This results in differential-phase-shift-keyed (DPSK) formats, which carry the information in optical phase changes between bits. June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 12 JRA4 WI2 Task 1: 40 and 100Gbps Test 1 40G With different modulation formats ASK NRZ, ASK CSRZ, ASK RZ, DPSK NRZ, DPSK CSRZ, DPSK RZ With different compensators of chromatic dispersion DCF, FBG channelized, FBG unchannelized, VIPA (Gemfire), GTE (Civcom), some of them CLA family With different amplifiers and amplification technique EDFA (CLA family, commercial), Raman With different transmission fibres G.652, G.655+, G.655- June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 13 JRA4 WI2 Task 1: 40 and 100Gbps Test 1 40G Just one example: 221 km, 2 hops, G.652/G.655+/G ,3 km 655-, 50km ,7 km G km/2217ps/nm SHF BERT TX B EDFA1 27dBm DCF B EDFA2 21dBm P EDFA3 10dBm Prox Tera CD compensation SHF BERT RX June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 14 JRA4 WI2 Task 1: 40 and 100Gbps Test 1 40G Results BER for all modulation formats BER=f (PoutEDFA1), PoutEDFA2=8 dbm Měření 221 km G.655+-/G.652 tolerance EDFA1, DPSK RZ 3 14,1 17,1 DPSK CSRZ 3 12,2 15,2 DPSK NRZ 2 13,5 15,5 ASK RZ 3,6 13,3 16,9 ASK CSRZ 3 10,9 13,9 ASK NRZ 9,1 2,2 11, Pedfa (dbm) June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 15 JRA4 WI2 Task 1: 40 and 100Gbps Test 1 40G Results BER for all modulation formats BER=f (PoutEDFA2), PoutEDFA1=10 dbm Měření 221 km G.655+-/G.652 tolerance EDFA2, DPSK RZ 2,5 18,7 21,2 DPSK CSRZ 4,7 14,1 18,8 DPSK NRZ 3 11,8 14,8 ASK RZ ASK CSRZ 6,6 7,2 13,8 ASK NRZ 5,7 3,2 8, Pedfa (dbm) June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 16 JRA4 WI2 Task 1: 40 and 100Gbps Test 1 40G Results BER for all modulation formats BER=f (CDFBG), PoutEDFA1=10 dbm, PoutEDFA2=8 dbm Tolerance to CD 221 km, DPSK RZ DPSK CSRZ DPSK NRZ ASK RZ ASK CSRZ ASK NRZ Chromatic dispersion (ps/nm) June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 17 JRA4 WI2 Task 1: 40 and 100Gbps Test 2.1&2.2 Simulations Simulation SW: OptiSystem 6.0, by Optiwave Modulations: ASK NRZ, ASK RZ, ASK CS-RZ, Optical Duo-Binary NRZ(ODB NRZ) and DPSK NRZ Fibres G.652, G.655+, G.655- and their combinations CD compensation: DCF, FBG Amplification: EDFA June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 18 JRA4 WI2 Task 1: 40 and 100Gbps Test 2.1&2.2 Simulations Results Tolerance to DCR ASK RZ least, ODB NRZ+DPSK NRZ most 655+/- links (L2,3,5) more tolerant to DCR than 652 (L1,4) Tolerance to launched power Transmission over 652 more than over 655+/- ODB NRZ least tolerant Single span more tolerant than two span June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 19 JRA4 WI2 Task 1: 40 and 100Gbps Test 2.3A Influence of fast signals on 10G transmission Basic measurement with 20, 40, 80G RZ pulses 0 U pd, mv 0,0008 A 0,0007 0,0006 0,0005 0,0004 0,0003 0,0002 0,0001 0, time, ps Tx 1 Tx x M U X A D E M U X Rx 1 Rx x Pulse generator (PMLL) OTDM MUX A June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 20 JRA4 WI2 Task 1: 40 and 100Gbps Test 2.3B Test over DWDM system in lab DWDM 100 GHz, 6*10G Injected 40G signals (20+25G signals malformed, 50G unavailable) With different modulation formats ASK NRZ, ASK CSRZ, ASK RZ, DPSK NRZ, DPSK CSRZ, DPSK RZ, ODB With different transmission fibres, single + dual hop G.652, G.655+, G.655- June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 21 JRA4 WI2 Task 1: 40 and 100Gbps Test 2.3B Test over DWDM system in lab 40G signal injected with shift: 100 GHz through MUX no influence on 10G signals 100 GHz through coupler no influence on 10G signals 50 GHz through coupler Single hop ASK NRZ, DPSK NRZ, DPSK CSRZ, ODB (dtto) Dual hop ASK NRZ, DPSK NRZ, ODB (dtto) June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 22 JRA4 WI2 Task 1: 40 and 100Gbps Test 2.3B Test over DWDM system in lab Tx 1 Tx x M U X A A D E M U X Rx 1 Rx x SHF BERT TX A June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 23 JRA4 WI2 Task 1: 40 and 100Gbps Test 2.3B Test over commercial DWDM system DWDM system 32ch 50GHz (Cisco MSTP) Loop-back (G652 2*136.7km), 6*EDFA, 2*MUX, 2*DEMUX (0.2nm) 40G ASK NRZ, ASK CSRZ, ASK RZ, DPSK NRZ, DPSK CSRZ, DPSK RZ Present 4*10G, 2*1G channels No G.709, FEC or E-FEC error observed on slow channels June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 24 JRA4 WI2 Task 1: 40 and 100Gbps Conclusions I G.652/G.655 differences have bigger leverage than for 10G designs G.655 means less compensating elements and therefore less attenuation and lower price G.652 allows for higher optical powers but this is not so critical for 40G EDFA vs Raman EDFAs not so expensive, Ramans require high optical powers safety issues Known from 10G experiments but for 40G it is even more important DCF vs FBG (vs GTE/VIPA) DCF lossy, bulky, expensive, minimum step appr. 100 ps/nm which can be rather limiting, non tuneable DCF with Raman - performance not so good (DCF: high Raman gain) FBG tuneable or fixed but both with good insertion loss, tuneability perhaps a must in some cases GTE/VIPA not so mature, tuneable and low insertion loss June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 25 JRA4 WI2 Task 1: 40 and 100Gbps Conclusions II ASK NRZ (ie OOK) vs other modulation formats ASK NRZ worst performance of all Low tolerancies to optical powers, chromatic dispersion Rather limited TX-RX distances (NIL or multispan) ODB or DPSK are better choices But NIL 100 km possible (perhaps not with all transceivers) Type of transmission fibres, compensators and modulation formats may have a big impact on a 40G (DWDM) solution EDFAs are almost essential, check noise figure Our experiments are single 40G (plus 10G DWDM signals) Because of expensive equipment 40G DWDM will be more affected by nonlinear effects June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 26 JRA4 WI2 Task 1: 40 and 100Gbps Acknowledgement Jan Gruntorád, Michael Enrico and CESNET team June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 27 JRA4 WI2 Task 1: 40 and 100Gbps Thank you for your attention! Slides for off-line reading follows June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 28 FP7 Capacities Work Programme: CAPACITIES, PART 1: RESEARCH INFRASTRUCTURES The Integrated Infrastructure Initiative (I3) model Integrated Infrastructure Initiatives (I3) should combine, in a closely co-ordinated manner: (i) Networking activities, (ii) Trans-national access and/or service activities and (ii) Joint research activities. All three categories of activities are mandatory as synergistic effects are expected from these different components. (iii) Joint Research activities. These activities should be innovative and explore new fundamental technologies or techniques underpinning the efficient and joint use of the participating research infrastructures. To improve, in quality and/or quantity, the services provided by the infrastructures, these joint research activities could address (non exhaustive list): higher performance methodologies and protocols, higher performance instrumentation, including the testing of components, subsystems, materials, techniques... June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 29 INFRA GÉANT infoday Jean-Luc Dorel, European Commission DG INFSO, ftp://ftp.cordis.europa.eu/pub/fp7/ict/docs/einfrastructure/ infoday-dorel_en.pdf GÉANT should reinforce the provision of end-to-end connectivity and services (user-to-user) by ensuring a high level of cohesion and coordination of priorities amongst the interconnected NRENs. GÉANT should represent an instantiation of the Internet of the future by making timely use of state-of-the-art communication technologies and considering solutions that may emerge from innovative research done in the context of Experimental Facilities . GÉANT should strive for world leadership by undertaking the necessary technical research activities and reinforce Europe's position as a hub for global research networking, by promoting intercontinental connectivity June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 30 Future Internet Research and Experimentation (FIRE) The ultimate goal of FIRE is boosting the European innovation and its competitive role in the definition of Future Internet concepts. The first FIRE call was published in June 2007, with a budget of euro 40M, as part of the ICT Research Programme of the European Union. It will be followed by a second call, expected for publication at the end of 2008, with an additional budget of euro 50M. building a European Experimental Facility for Future Internet research, and supporting experimentally-driven advanced research, which defines the challenges for the evolving facility, and takes advantage of it. It represents a key milestone for updating the vision and the roadmap for the European Experimental Facility and the experimentally-driven visionary research for the Future Internet. June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 31 Photonic (all-optical) services From lab to real world dark fibre Experimental Facility (EF) needed user participation of EF is directed by experiments EF can be used for experimental services to NREN (testing of EF DWDM lines by real traffic of NREN) deployment of photonic services in R&E networks saving energy, housing space and cost (especially with bidirectional single fibre transmission) photonic experts able to work in R&E network environment needed federated and interoperable photonic services for R&E upgrade of dark fibre lease to lit fibre lease (contracting deployment of photonic technology by fibre provider, based on our lighting project), with dedicated or shared fibre capacity deployment of photonic services in ISP/enterprise networks June 25, 2008 Plenary session, GN2 6th Technical Workshop, Berlin 32
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