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EU-Japan Workshop, Brussels 18-April-2013 Research on Next Generation Optical Access Networks

EU-Japan Workshop, Brussels 18-April-2013 Research on Next Generation Optical Access Networks. Josep Prat Universitat Politècnica de Catalunya (UPC) Barcelona. xWDM. WDM. -. -. PON. Optical access evolution. CAPACITY, cost (per user). ngPON 1 . ngPON 2, 3 . FTTH WDM-PON.

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EU-Japan Workshop, Brussels 18-April-2013 Research on Next Generation Optical Access Networks

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  1. EU-Japan Workshop, Brussels 18-April-2013Research on Next Generation Optical Access Networks Josep Prat Universitat Politècnica de Catalunya (UPC) Barcelona

  2. xWDM WDM - - PON Optical access evolution CAPACITY, cost (per user) ngPON 1 ngPON 2, 3 .. FTTH WDM-PON ultra-dense WDM-PON E (OFDM) / Coh 1G FTTH-PtP 100M WDM&TDM-PON FTTH XG/G/E-PON HFC xDSL 10M ADSL TIME POTs 2013 2008 ACCORDANCE SARDANA COCONUT EU projects: EUROFOS NoE ALPHA IP OASE IP MUSE IP DISCUS IP

  3. PON Optical spectrum FSAN-ITU Estandards: • Video: IP • EDFA • Lowlossfiber • High availability of comp. ? 10 10 possible bands for ngPON3 (with compatibility) : XG-PON upstream G-PON upstream G-PON downstream NG2 Video XG NG2 40 nm 1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 1590 1600 1610 40 nm / 6.25 G = 800 channels !! CAPACITY x 100 !!

  4. E/O BW & power Efficiency • Statistical WDM multiplexing • Time-switched phase diversity&modulation 1000% EF = Rb / BWD RoF OFDM Electrical Spectrum Efficiency ud-WDM 100% 10% WDM/TDM GPON 1% XG-PON 0.1% PowerComsp.: = a C Vd2fr + Io 10Vt/SVd x Activity % 0.01% 100% 0.1% 1% 10% Optical Spectrum Efficiency

  5. PON alternatives

  6. SARDANA project Scalable Advanced Ring-based passive Dense Access Network Architecture” Activity: ICT-1-1.1 - Network of the FutureGrant agreement n.: 217122 (SARDANA)STREP: 2008-2010, 2.6 MEuro

  7. SARDANA architecture def. • Resilient trunk • Fully passive • Hybrid: • WDM Metro ring • TDM Access trees • Cascadable remote nodes • New adoption of remotely-pumped amplification • Colourless ONU • RSOA • Tunable laser • 10G-2.5G (1G-100Mb /user) • 100 Km • 1000 users • Multi-operator • Based on xGPON, but transparent. • IP trafic SARDANA PON

  8. SARDANA inter-operability & multi-operability

  9. 3 testbed demonstrations • Stakeholder demo in Espoo (Finland) in October 2010 (integration and tests) • Field trial in Lannion(France), in January over the metropolitan 12x 18 Km ring cable • Public demo at the Exhibit of FTTH Council Europe 2011, in Milan in February 2011.

  10. ACCORDANCE STREP project AConverged Copper-Optical-RaDio OFDMA-basedAccessNetwork with HighCapacity andFlExibility Objectives Consortium • Definition of a novel Access Network architecture achieving convergence among heterogeneous technologies (optical, wireless, copper). • Propose low-cost, low-complexity concepts to achieve ultra high data rates in the access network (up to 100Gbps aggregate and more than 10Gbps in each segment). • Introduction of flexible bandwidth allocation concepts using dynamic FDM and OFDM sub-carrier assignment. • Provision of smooth migration from and coexistence with legacy access solutions. • Demonstration of the ACCORDANCE concepts using experimental test beds.

  11. OFDM-PON (ACCORDANCE STREP project) Envisioned Converged Network Architecture Integrated DEMO

  12. OFDM-PON system OLT ONU Indicative experimental results by ACCORDANCE partners: R. Schmogrow et al., “101.5 Gbit/s Real-Time OFDM Transmitter with 16QAM Modulated Subcarriers” , OFC’11 OFC’13: P. Schindler et al. OW1A.5

  13. Flexible BW Allocation to deal with: the Power difference between (ONU1-ONU2) for proper detection at BER=10-3, leaving ONU1 with B(Q)PSK modulation ONU2 BW occupation [%] ONU2 BW occupation [%] 50 40 30 20 10 0 50 40 30 20 10 0 f e d c b a a b c d e f The high BW granularity allows OFDMA to deal with differential link loss among users.

  14. Example of ACCORDANCE MAC Scheduling • Various options possible: • Multiple subcarriers per ONU (hybrid OFDMA/TDMA) • Multiple ONUs per subcarrier (TDMA) PHY/MAC Cross-layer optimization • Use of Adaptive Subcarrier Modulation (ASM) • Use a different m-QAM for each ONU based on transmission performance • MAC takes into account different bitrates for a subcarrier each time, depending on the allocation • Lower delay for same traffic, i.e. capacity is effectively increased

  15. COCONUT project: Coherent UD-WDM Can we improve the spectral efficiency in both optical&electrical domains? and the BW? and optical fine granularity ? and the Power budget? Proposal: Coherent UD-WDM with random-wavelength DFB lasers

  16. 10th Concertation Meeting, October 2012 COst-effective COhereNt Ultra-dense-WDM-PON for lambda-To-the-user access COCONUT • STREP 318515, ICT Objectives 1.1 a) b) • 1st-Nov + 36 months • Coordinator: • SSupSA (Ernesto Ciaramella) • Vice-coordinator: UPC (Josep Prat) • GOAL: efficientlTTH • 1G-to-the-Home + 10G-to-the-Antenna • By: ultra-dense WDM-PON, by: • Statistical WDM multiplexing • Simplified coherent transmission

  17. What Ligh Source at Home for WDM ? • Requirements: • All the same : colourless (wavelength agnostic) • for feasible provisioning and high volumes fabrication • Broadband: > 1GBit/s • Possible solutions: • Tuneable laser : still expensive and non-repetible • Reflective SOA, wavelength remodulation: limited perform. • Random-wavelength laser !? • Statistical multiplexing • CO adapts to ONU • Benefit of chaos ..!

  18. Wavelength contention statistics • Grid= 6.25GHz • Total BW = 30nm • Uniform laser statisticaldistribution • Max. N. users = 600 • Thermal 2nm (DFB) • (Results 1000 times aver.) With thermal tuning Without thermal tuning ~ 1 ONU in 512 to replace • Spectralefficiency: • Periodicalallocation: 16 % • Statisticalallocation: 14%

  19. NGPON2/3 arch. features comparison (typical-mean values) * Symmetrical PON; ** 16QAM; *** Only odd carriers used.

  20. Possible colaboration research topics • Definition of requirements, test of solutions and standardization steps towards NGPON3, implementing the concept of lambda-to-the-home lTTH • from 100 Mb  to 10 Gb to each home or antenna site • Development of low cost phase-modulated lasers for elastic coherent udWDM-PON. • Global Convergence of udWDM wired access, wireless and metro networks, in physical, MAC and control plane layers • current collaboration between NEC and Accordance/AIT • All optical processing with OCDMA multiplexing, transmission and GMPLS routing • topic in joint research by NICT, RomaTre, Aveiro Univ. • Extension of the concepts and techniques to smaller ranges: • CORE -> ACCESS -> LOCAL WIRED AND WIRELESS

  21. THANKS! Acknowledgements: European 7th Framework Programme project SARDANA (www.ict-sardana.eu) European 7th Framework Programme project ACCORDANCE (www.ict-accordance.eu) European 7th Framework Programme Network of Excellence EUROFOS (www.euro-fos.eu) European 7th Framework Programme project COCONUT (www.ict-coconut.eu)

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