1. Networking Benefits of Advanced DSP Techniques
Fotonica 2017 – 19a Edizione – convegno italiano delle tecnologie fotoniche
May 3TH 2017 – padova
Networking Benefits of Advanced DSP Techniques
ALESSIO FERRARI* – Mattia cantono – Vittorio curri
Optcom group – dipartimento di elettronica e telecomunicazioni
Politecnico di torino – Italy –

2. Application of advanced DSP technique Conclusion
outline
Motivations
The baseline scenario
Application of advanced DSP technique
Conclusion

3. Application of advanced DSP technique Conclusion
outline
Motivations
The baseline scenario
Application of advanced DSP technique
Conclusion

4. The traffic growth – cisco forecast
Compound Annual Growth Rate (CAGR)
Total IP Traffic: 22%

5. Photonic switching – Power consumption 2/2
OEOs for  wavelength conversion and/or extension of reach occupying 50% of express ports
~ 65% of the power consumption is represented by regenerators for wavelength conversion and/or extension of reach
Results from: Murakami, Makoto et al. "Power consumption analysis of optical cross-connect equipment for future large capacity optical networks" ICTON, 2009

6. Application of advanced DSP technique Conclusion
outline
Motivations
The baseline scenario
Application of advanced DSP technique
Conclusion

7. The Topologies alessio.ferrari@studenti.polito.it PAN-European Network
USNET Network
28 Nodes
41 Links
Average Node Degree: 2.93
Average Link Length: 637 km
24 Nodes
43 Links
Average Node Degree: 3.58
Average Link Length: 308 km

8. An any-to-any traffic matrix 200 Gbps Grooming Size
Network parameters
PAN-European Network
USNET Network
An any-to-any traffic matrix
200 Gbps Grooming Size
RWA through k-shortest path with first fit wavelength allocation

9. 80 fix-grid WDM channels on the C-band
Physical parameters
Fiber: SSMF attenuation 0.2 dB/km, dispersion 16.7 ps/nm/km, 1.3 1/W/km
EDFA noise figure 5 dB
80 fix-grid WDM channels on the C-band
Raw symbol rate 32 GBaud, Net symbol rate 25 GBaud
PM-16-QAM modulation, 200 Gbps per LP
Target BER 4∙10-3, thus target OSNR dB

10. The LPs are allocated on the network The OSNR of each LP is computed
OEO distribution
The LPs are allocated on the network
The OSNR of each LP is computed
If it is below the target OSNR the LP is labelled as ULP
OEOs are distributed along the ULPs to make the connection in-service
OEOs are distributed based on the minimum stops algorithm

11. The baseline 572 ULPs on 756 LPs (75.6%) 1108 OEO regenerators
PAN-European Network
USNET Network
572 ULPs on 756 LPs (75.6%)
1108 OEO regenerators
1.94 OEO per ULP on average
29 ULPs on 552 LPs (5.2%)
29 OEO regenerators
1 OEO per ULP

12. Application of advanced DSP technique Conclusion
outline
Motivations
The baseline scenario
Application of advanced DSP technique
Conclusion

13. Target OSnr PS

14. DSP In the Pan-European network 1/3
572 ULPs on 756 LPs (75.6%)
17%/dB
30%/dB

15. DSP In the Pan-European network 2/3
1108 Regenerators
27.8% per dB

16. DSP In the Pan-European network 3/3
1680 Tx/Rx
526 per dB

17. DSP In the USnet network 1/3
29 ULPs on 552 LPs (5.2%)
111% per dB

18. DSP In the USnet network 2/3
29 Regenerators
111% per dB

19. DSP In the USnet network 3/3
58 Tx/Rx
32 per dB

20. DSP In the USnet network
PAN-European
ΔOSNR
OEO saving
Number of Tx/Rx
DBP
0.6 dB
238 (21.5%)
467 PS
0.7 dB
240 (21.7%)
469
USNET
ΔOSNR
OEO saving
Number of Tx/Rx
DBP
0.6 dB
23 (79%) 23 PS
0.7 dB
24 (83%) 24

21. Application of advanced DSP technique Conclusion
outline
Motivations
The baseline scenario
Application of advanced DSP technique
Conclusion

22. Conclusions and future works
Also small ΔOSNR are capable to provide some improvement
The USNET network is better performing due to the higher average node degree and lower average link length
Future works:
Merging Raman and DSP
SDM can be used in the same kind of studies