1. Broadband Access Solutions on a Common CWDM Platform K. Habel, K.-D. Langer (HHI) G.-J. Rijckenberg, A. Ng’oma, T. Koonen, (TU/e) J. Lepley, S. Walker (UoE)

2. NOC 2006 11.-13.07.2006 — 2 Outline > Introduction/ Motivation > Description of developed solutions CWDM Rings VDSLoO FWA > Experimental results > Conclusion

3. NOC 2006 11.-13.07.2006 — 3 Introduction/Motivation > Demand for high-speed access solutions is rising > Triggered by “new” services like VoIP, IPTV, VoD, … > IST project MUSE aims for cost-efficient solutions for a multi- provider multi-service access network > MUSE results with respect to optical access presented > Three particular optical access solutions have been developed: A CWDM Ring architecture: provides protected FttX connectivity and feeder network for other First Mile Analogue VDSL over optics architecture: transmits VDSL signals over an optical carrier by means of SCM Fixed Wireless Access (FWA): based on a Radio over Fibre (RoF) using Optical Frequency Multiplication (OFM) > Solutions developed independently, but have been integrated for testing on common CWDM Ring platform for joint experiment

4. NOC 2006 11.-13.07.2006 — 4 Setup Overview > Optical feeder carrying three technologies > Demonstration of interoperability on physical layer > Combination of analogue and digital signals  distortions?

5. NOC 2006 11.-13.07.2006 — 5 CWDM, what was it again? > ITU-T G.694.2: 18 -channels with 20 nm spacing > Large channel spacing allows: un-cooled lasers (temperature dependence) relaxed manufacturing tolerances Easier filter design (compared to DWDM)  low-cost > Better usage of fibre bandwidth compared to established access systems (1310/1490/1550nm) > More expensive than single channel solutions > Less expensive than DWDM systems nm 130014001500 1600

6. NOC 2006 11.-13.07.2006 — 6 Outline > Introduction > Description of developed solutions CWDM Rings VDSLoO FWA > Experimental results > Conclusion

7. NOC 2006 11.-13.07.2006 — 7 CWDM Rings system: lab setup (HHI) CWDM feeder ring with: up to 20km length, up to 9 remote nodes and 18 -channels single wavelength distribution ring (can be grey by using a media converter) System provides protected path to ONUs Ethernet Switch PC Linux ONU #1 Protection path Normal path ONU #2 Customer(s) Feeder area ringDistribution area ring Hub (CO) to Metro domain SFP-TRx PC Linux MUXDMUX MUX DMUX OADM

8. NOC 2006 11.-13.07.2006 — 8 VDSL over optics (OLT) HPF DFB-Laser LO Photodiode OLT Upstream Downstream CO DSLAM Optical Interface CO modem 4  100base-T    DC Circ.    4x       200300400 Frequency (MHz) -20 -60 -100 rel- PSD (dBm) 60 MHz channel separation 4 channels using 998-138-1200 VDSL band plan

9. NOC 2006 11.-13.07.2006 — 9 VDSL over optics (ONU) 100BASE-T HPF DFB-LD LO Photodiode DC CPE modem ONU Downstream Upstream Optical Interface    200300400 Frequency (MHz) -20 -60 -100 rel. PSD (dBm) > Simple ONU design > Low power consumption (ideal for remote cabinets) > Low foot-print

10. NOC 2006 11.-13.07.2006 — 10 FWA system: Bi-directional OFM system with remote LO (TU/e) Fiber link f sw tun. LD MZI Mod. 0 Headend station PD data up 1 0 1 WDM  periodic BPF f shift data down BPF 2 f mm – f shift f mm + f shift BPF 1 f mm DSP AGC DAC ADC PD Radio Access Point BPF 1 f mm x BPF 1 LD antenna circulator 1 0 mixer WDM f IF BPF 2 LNA MPA (De)modulation Filtering Synchronisation BPF

11. NOC 2006 11.-13.07.2006 — 11 Outline > Introduction > Description of developed solutions CWDM Rings VDSLoO FWA > Experimental results > Conclusion

12. NOC 2006 11.-13.07.2006 — 12 Trial setup overview Two counter-propagating fibre rings (10km) OLT CWDM FAR VDSLoO VDSL ONU RAP e.g.WiMAX FWA DAR (GbE) with protection ONU shared GbE ONU metrohomedistribution feeder CO

13. NOC 2006 11.-13.07.2006 — 13 CWDM channel comb CWDM signal after MUX @ CO CWDM signal after remote node 2 16 channels (20nm spacing) CWDM protection

14. NOC 2006 11.-13.07.2006 — 14 CWDM Rings: Comparison of Receiver Sensitivity protection path (downlink) Sensitivity: ~-27 dBm Penalty: ~0.1 dB normal path (uplink) Sensitivity: ~-27 dBm Penalty: ~0.3 dB back-to-back stand alone trial integrated BER P Rx [dBm] protection path downstream R = 1.25 Gb/s back-to-back stand alone trial integrated BER P Rx [dBm] normal path upstream R = 1.25 Gb/s

15. NOC 2006 11.-13.07.2006 — 15 FWA: Measured spectra for up- and downstream Downstream @ Antenna station: > very pure carriers with a few Hz linewith Upstream (received): Bidirectional system shown ~17.2 GHz~1.1 GHz

16. NOC 2006 11.-13.07.2006 — 16 FWA: Measured EVM and SNR parameters of the recovered upstream data VSA (vector signal analyser) measurements: > 16 QAM constellation diagram > 100 Mbps bitrate > Transmission over the CWDM Ring with other systems also active –IF at 1.1 GHz > EVM of <6% for all cases, compliant with WiMax standard

17. NOC 2006 11.-13.07.2006 — 17 VDSLoO: Bit Loading characteristic > aggregate downstream (blue) rate = 19 Mbps > upstream (red) rate = 10.6 Mbps > data transmission efficiency  25 … 30%, caused by EMI > 70% efficiency has been shown in stand- alone setup > Interchannel crosstalk measured at <23 dB for 30 MHz channel spacing

18. NOC 2006 11.-13.07.2006 — 18 Conclusions > Feasibility of an integrated passive CWDM feeder ring with protection shown (up to 20 km possible) > Three different prototypes: FWA, VDSLoO, and CWDM Rings integrated into one optical access system > Systems did not interfere with each other and have same characteristics compared to stand-alone setups > CWDM technology allows for various feeder architectures (ring, star, …) and can carry different types of distribution technologies

19. NOC 2006 11.-13.07.2006 — 19 End Thank you for your attention, By the way parts of this setup arer shown at the foyer