Presentation is loading. Please wait.

Presentation is loading. Please wait.

Josep Prat Universitat Politècnica de Catalunya (UPC) Barcelona

Similar presentations


Presentation on theme: "Josep Prat Universitat Politècnica de Catalunya (UPC) Barcelona"— Presentation transcript:

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

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

3 PON Optical spectrum possible bands for ngPON3 (with compatibility) :
FSAN-ITU Estandards: ? 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 G-PON upstream XG-PON 1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 G-PON downstream XG Video NG2 10 10 possible bands for ngPON3 (with compatibility) : 40 nm Video: IP EDFA Low loss fiber High availability of comp. 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 Vd2 fr + Io 10Vt/S Vd x Activity % 0.01% 0.1% 1% 10% 100% Optical Spectrum Efficiency

5 PON alternatives GPON XGPON TWDM-PON cUDWDM-PON WDM-PON SCM/OFDM-PON
Aggregate BW 2.5/1.25 10G/2.5 40G/10G >40G Depends on type Good if combined with WDM Granularity (min BW/user) 1 AWG port assigned N subcarriers 1G-10G Good if +TDM Complexity, cost Tunable TRX ONUs Up-stream or tunable laser Upstream, PAPR, optical amplif. or coherent Coherent RX, random/tunable lasers ? Energy efficiency BWuser / G BWuser / G If ONU only handles assign. subc. User rate = line rate Optical spectrum efficiency Good if combined with WDM or coherent Power budget best Incremental scalability (n.,BW) Limited by device, AWG, or RBS Compatibility AWG Sensitivity issue Wireless Splitter if coherent det.

6 SARDANA project Scalable Advanced Ring-based passive Dense Access Network Architecture” Activity: ICT Network of the Future Grant agreement n.: (SARDANA) STREP: , 2.6 MEuro Participant name Short name Country 1 Universitat Politecnica de Catalunya UPC Spain 2 France Telecom / Orange FT France 3 Tellabs TELLABS Finland 4 Intracom S.A. Telecom Solutions IntraCOM Greece 5 Instituto de Telecomumicações IT Portugal 6 High Institute of Communication and Information Technology ISCOM Italy 7 Research and Education Laboratory in Information Tech. AIT 6

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
A Converged Copper-Optical-RaDio OFDMA-based Access Network with High Capacity and FlExibility 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 Indicative experimental results by ACCORDANCE partners:
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 50 40 30 20 10 ONU2 BW occupation [%] 50 40 30 20 10 ONU2 BW occupation [%] f e d c b a (the mod. Index is kept, hence for lower amount of subcarriers, the ratio between levels increases allowing to have higher SNR → relaxing the receiver sensitivity) 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 COCONUT COst-effective COhereNt Ultra-dense-WDM-PON for lambda-To-the-user access STREP , ICT Objectives 1.1 a) b) 1st-Nov + 36 months Coordinator: SSupSA (Ernesto Ciaramella) Vice-coordinator: UPC (Josep Prat) GOAL: efficient lTTH 1G-to-the-Home + 10G-to-the-Antenna By: ultra-dense WDM-PON, by: Statistical WDM multiplexing Simplified coherent transmission 10th Concertation Meeting, October 2012

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 statistical distribution Max. N. users = 600 Thermal 2nm (DFB) (Results 1000 times aver.) With thermal tuning Without thermal tuning ~ 1 ONU in 512 to replace Spectral efficiency: Periodical allocation: 16 % Statistical allocation: 14%

19 NGPON2/3 arch. features comparison
XG-PON TWDM WDM/TDM-PON OFDM-PON ** UD-WDM Aggregate BW 10 GBit/s 40 GBit/s 320 GBit/s GBit/s x8 512 GBit/s User data* MBit/s MBit/s 50M-1G Bit/s 100 MBit/s 1 GBit/s Bit rate GBit/s ONU Elec. BW kHz - 10GHz kHz - 10GHz Fi – Fi+50MHz MHz - 1 GHz Elec.Spectrum Eff.(up) 0.5% 1% 0.5% - 10% < 200%*** < 200% Number of users 32 128 512 Wavelength Channels 1-2 4-8 1-8 Wavelength Spacing - 100 GHz GHz >50 GHz GHz Optical Spectrum Eff. (up) 10% 20-40% 1% - 20% % Passive distance reach 20 km 20 Km 60 km 100 km COST (per user, 1G, relative) 1 2 3 – 0.8 26 - 1 10 – 0.8 ENERGY C. (per user, relative) 2 – 0.8 10 – 0.7 Added features compatibility protection, metro-access converg. wired&wireless convergence, SC-DBA user independency splitter Issues Tunable ONU Colourless ONU, Optical remote pump power Up-stream OBI, PAPR, Sensitiv. Wavel.tuning, polarization (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)


Download ppt "Josep Prat Universitat Politècnica de Catalunya (UPC) Barcelona"

Similar presentations


Ads by Google