Investigation of cost, power, and spectral efficiency in fixed- and flexi-grid networks (original) (raw)

Abstract

With the steady growth of traffic volume in core networks, it is predicted that future optical network communication will be constrained mainly by cost and power consumption. Thus, for Internet sustainability, it will be necessary to ensure cost and power efficiency in optical networks. The aims of this study are (i) to identify the main sources of cost and power consumption in fixed-grid (SLR and MLR) and flexi-grid (OFDM) optical networks, and (ii) to compare techniques for improving cost and power efficiency in SLR/MLR- and OFDM-based networks. To this end, we conducted a comparative analysis of cost and power efficiency for the OFDM- and MLR/SLR-based networks, and considering realistic networks, evaluated the cost and power consumed by different components in the optical layer. Our results show that (i) OFDM-based networks outperform those based on MLR/SLR in terms of both cost and power-efficiency, (ii) the extra equipment cost incurred due to under-utilization of spectrum is reduced by switching to a flexi-grid network, (iii) lower power consumption per bit is obtained when the networking solution ensures a finer bit-rate granularity, and (iv) there exists a power and spectrum minimization trade-off that is network characteristic dependent.

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References

  1. A. Nag, M. Tornatore, B. Mukherjee. Optical network design with mixed line rates and multiple modulation formats [J]. IEEE/OSA journal of lightwave technology, 2010, 28(4): 466–475.
    Article Google Scholar
  2. S. P. Singh, S. Sengar, R. Bajpai, et al. Next-generation variable-line-rate optical WDM networks: Issues and challenges [J]. Journal of optical communication, 2013, 34(4): 331–350.
    Article Google Scholar
  3. M. Jinno, B. Kozicki, H. Takara, et al. Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network [J]. IEEE communications magazine, 2009, 48(8): 138–145.
    Article Google Scholar
  4. M. Jinno, H. Takara, B. Kozicki, et al. Spectrum-efficient and scalable elastic optical path network: Architecture, benefits, and enabling technologies [J]. IEEE communications magazine, 2009, 47(11): 66–73.
    Article Google Scholar
  5. O. Gerstel, M. Jinno, A. Lord, et al. Elastic optical networking: A new dawn for the optical layer [J]. IEEE communications magazine, 2012. 50(2): S12-S20.
    Google Scholar
  6. A. Morea, A. F. Chang, O. Rival. Impact of transparent network constraints on capacity gain of elastic channel spacing [C]//IEEE Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC), 2011. JWA62.
    Google Scholar
  7. O. Rival, A. Morea. Cost-efficiency of mixed 10-40-100Gb/s networks and elastic optical networks [C]//IEEE Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC), 2011. OTuI4.
    Google Scholar
  8. X. Dong, T. E. H. ElGorashi, J. M. H. Elmirghani. Energy efficiency of optical OFDM-based networks [C]//Proceedings of IEEE ICC, 2013:4131–4136.
    Google Scholar
  9. J. Lopez, Y. Ye, I. T. Monroy. Energy efficiency in flexible bandwidth optical networks [C]//International Conference on the Network of the Future (NOF), 2011:107–111.
    Google Scholar
  10. J. Lopez, Y. Ye, V. Lopez, et al. On the energy efficiency of survivable optical transport networks with flexible-grid [C]//IEEE European Conference and Exhibition on Optical Communication (ECOC), 2012. P5.05.
    Google Scholar
  11. H. Khodakarami, B. P. Gopalakrishna, B. Sedighi, et al. Flexible optical networks: An energy efficiency per-spective [J]. IEEE/OSA journal of lightwave technology, 2014, 32(21): 3356–3367.
    Article Google Scholar
  12. ITU-T Recommendation G.694.1. Spectral grids for WDM applications: DWDM frequency grid [S]. 2012.
  13. K. Christodoulopoulos, I. Tomkos, E. A. Varvarigos. Elastic bandwidth allocation in flexible OFDM-based optical networks [J]. IEEE/OSA journal of lightwave technology, 2011, 29(9): 1354–1366.
    Article Google Scholar
  14. SMART 2020: Enabling the low carbon economy in the information age, GESI [R]. 2008.
  15. Cisco visual networking index: Forecast and methodology 2012-2017. Cisco White Paper [R]. 2013.
  16. F. Idzikowski, S. Orlowski, C. Raack, et al. Saving energy in IP-over-WDM networks by switching off line cards in low-demand scenarios [C]//IEEE Optical Network Design and Modeling (ONDM), 2010:1–3.
    Google Scholar
  17. S. Iyer, S. P. Singh. Spectral and power-efficiency investigation in single and multi-line-rate optical wavelength division multiplexed (WDM) networks [J]. Photonic network communications, 2017, 33(1): 39–51.
    Article Google Scholar
  18. B. Collings. New devices enabling software-defined optical networks [J]. IEEE communications magazine, 2013, 51(3): 66–71.
    Article Google Scholar
  19. Y. Li, L. Gao, G. Shen, et al. Impact of ROADM colorless, directionless, and contentionless (CDC) features on optical network performance [J]. IEEE/OSA journal of optical communications and networking, 2012. 4(11): B58-B67.
    Google Scholar
  20. F. Rambach, B. Konard, L. Dembeck, et al. A multilayer cost model for metro/core networks [J]. IEEE/OSA journal of optical communications and networking, 2013, 5(3): 210–225.
    Article Google Scholar
  21. FP 7-STRONGEST project, D2.1. Efficient and optimized network architecture: Requirements and reference scenarios [EB/R]. http://www.ict-strongest.eu.
  22. Finisar Corporation. ROADMs and wavelength management [EB/OL]. https://www.finisar.com/roadms-wavelength-management/10wsaaxxfll.
  23. Finisar Corporation. Optical transceivers [EB/OL]. https://www.finisar.com/optical-transceivers/ftlc3321-x3nl.
  24. ADVA Packet Optical Convergence, Juniper. White paper [EB/R]. https://www.juniper.net/assets/kr/kr/ local/pdf/whitepapers/2000582-en.pdf.
  25. W. V. Heddeghem, F. Izdikowski, W. Vereecken, et al. Equipment power consumption in optical multilayer networks [EB/R]. Source Data. Berlin (TKN). Report Number: IBCN-12-001-01, http://www.tkn.tu-berlin.de/fileadmin/fg112/Internals/idzi12Equipmentp-owercons.pdf, 2012:1-28.
  26. ADVA. FSP 3000 coherent transponders. Fact sheet [R]. 2012.
  27. Ciena: F10-T 10G transponder. Datasheet [EB/R]. http://www.ciena.com/products/f10-t/tab/features/, 2011.
  28. Lementum. Wavelength selective switches [EB/OL]. https://www.lumentum.com/en/products/trueflex-1x9-wavelength-selective-switch.
  29. Lementum. Wavelength selective switches [EB/OL]. https://www.lumentum.com/en/products/trueflex-tw-in-high-port-countwavelength-selective-switch-twin-wss.
  30. I. Dedic. High-speed CMOS DSP and data converters [C]//IEEE Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC), Workshop, Transmission Subsystems and Network Elements, 2011. OTuN1.
    Google Scholar
  31. I. Dedic. 56Gs/s ADC enabling 100GbE [C]//IEEE Optical Fiber Communication/National Fiber Optic Engineers Conference (OFC/NFOEC), 2010:1–3.
    Google Scholar
  32. R. Bouziane, P. Milderet, R. Koutsoyannis, et al. Design studies for an ASIC implementation of an optical OFDM transceiver [C]//IEEE European Conference and Exhibition on Optical Communication (ECOC), 2010:1–3.
    Google Scholar
  33. F. Idzikowski. Power consumption of network elements in IP over WDM networks [EB/R]. TU Berlin, Germany, Technical Report, 2010.
    Google Scholar
  34. Transmode TM-series data sheet [EB/R]. http://www.transmode.com/, 2010.
  35. Fujistu 2015 [EB/OL]. http://www.fujitsu.com/jp/group/foc/en/resources/news/press-releases/2015/201-50319-3.html.
  36. A. Napoli, M. Bohn, D. Rafique, et al. Next generation elastic optical networks: The vision of the european research project IDEALIST [J]. IEEE communications magazine, 2015, 53(2): 152–162.
    Article Google Scholar
  37. IDEALIST Project. Elastic optical network architecture: Reference scenario, cost and planning [R]. Deliverable D1.1, 2013.
  38. S. Iyer, S. P. Singh. Investigation of launch power and regenerator placement effect on the design of mixed-line-rate (MLR) optical WDM networks [J]. Photonic network communications, 2017.
    Google Scholar
  39. A. Nag, T. Wang, B. Mukherjee. Robust design of spectrum-efficient green optical backbone networks [J]. IEEE/OSA journal of lightwave technology, 2013, 31(7): 1138–1144.
    Article Google Scholar
  40. K. Christodoulpoulos, P. Soumplis, E. A. Varvarigos. Planning flexible optical networks under physical layer constraints [J]. IEEE/OSA journal of optical communications and networking, 2013, 5(11): 1296–1312.
    Article Google Scholar

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Authors and Affiliations

  1. Department of ECE, Jain College of Engineering, T S. Nagar-Machhe, Belagavi, Karnataka, 590014, India
    Sridhar Iyer
  2. Division of ECE, Netaji Subhas Institute of Technology, Sector-3, Dwarka, New Delhi, 110078, India
    Shree Prakash Singh

Authors

  1. Sridhar Iyer
  2. Shree Prakash Singh

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Correspondence toSridhar Iyer.

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Sridhar Iyer [corresponding author] received the B.E. degree in electronics and telecommunications engineering from Mumbai University, India in 2005, M.S degree in electrical and communication engineering from New Mexico State University, U.S.A in 2008, and the Ph.D. degree from Delhi University, India in 2017. He worked as an assistant professor in the Department of ECE at NIIT University, and Christ University, India between 2012–2016. Currently he is an associate professor in the Department of ECE, Jain College of Engineering, India. His research interests include the architectural, algorithmic, and performance aspects of the optical networks, with current emphasis on efficient design and resource optimization in the exi-grid elastic optical networks. Dr. Iyer has published over 30 peer-reviewed articles in the aforementioned areas.

Shree Prakash Singh received received his B.E. degree in electronics and communication engineering from MMM Engineering College, Gorakhpur, India, in 1990 and M.Tech. degree from REC, Kurukshetra, India, in 1994. He holds a doctoral degree in optical networks from the Indian Institute of Technology, Delhi (IITD), India, in 2007. During 1994-2000, he worked as lecturer in the Department of Electronics and Computer Engineering at REC Kurukshetra. In October 2000, he joined as lecturer in the Department of Electronics, Netaji Subhas Institute of Technology (formally known as Delhi Institute of Technology New Delhi). Presently he is a professor at the Division of Electronics and Communication Engineering, Netaji Subhas Institute of Technology, New Delhi. His current area of research is optical networks, optical wireless communication.

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Iyer, S., Singh, S.P. Investigation of cost, power, and spectral efficiency in fixed- and flexi-grid networks.J. Commun. Inf. Netw. 2, 92–106 (2017). https://doi.org/10.1007/s41650-017-0032-8

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