Abstract

Single and multi-carrier networks offering channel rates up to 400 Gb/s are evaluated under realistic reach parameters. It is found that efficient spectrum utilization and fine bit-rate granularity are essential to achieve cost and energy efficiency. Additionally, the break-even cost of flexible orthogonal frequency division multiplexing transponders is examined under different settings. The break-even cost of a flexible transponder corresponds to the cost value for which the total cost of the network is equal to that of the related single-line-rate network. The impact of the traffic load, the additional cost required for flex-grid optical cross connects, the cost of spectrum, as well as the cost of fixed-grid transponders is examined.

© 2012 OSA

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References

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  1. A. Nag, M. Tornatore, and B. Mukherjee, “Optical network design with mixed line rates and multiple modulation formats,” J. Lightwave Technol., vol. 28, pp. 466–475, 2010.
    [CrossRef]
  2. M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
    [CrossRef]
  3. S. Poole, S. Frisken, M. A. Roelens, and C. Cameron, “Bandwidth-flexible ROADMs as network elements,” in Proc. of OFC, 2011, OTuE1.
  4. C. Glingener, “Optical networking trends and evolution,” in Proc. of OFC, 2011, OThAA1.
  5. O. Gerstel, M. Jinno, A. Lord, and S. J. Yoo, “Elastic optical networking: A new dawn for the optical layer?” IEEE Commun. Mag., vol. 50, no. 2, pp. s12–s20, Feb.2012.
    [CrossRef]
  6. A. N. Patel, P. N. Ji, J. P. Jue, and T. Wang, “Survivable transparent flexible optical WDM (FWDM) networks,” in Proc. of OFC/NFOEC, 2011, OTuI2.
  7. A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.
  8. A. Morea, A. F. Chong, and O. Rival, “Impact of transparent network constraints on capacity gain of elastic channel spacing,” in OFC/NFOEC, 2011, JWA62.
  9. O. Rival and A. Morea, “Cost-efficiency of mixed 10-40-100 Gb/s networks and elastic optical networks,” in OFC/NFOEC, 2011, OTuI4.
  10. K. Christodoulopoulos, I. Tomkos, and E. A. Varvarigos, “Elastic bandwidth allocation in flexible OFDM-based optical networks,” J. Lightwave Technol., vol. 29, pp. 1354–1366, 2011.
    [CrossRef]
  11. K. Christodoulopoulos, K. Manousakis, and E. Varvarigos, “Reach adapting algorithms for mixed line rate WDM transport networks,” J. Lightwave Technol., vol. 29, no. 21, pp. 3350–3363, 2011.
    [CrossRef]
  12. K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.
  13. M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.
  14. A. Klekamp, R. Dischler, and F. Buchali, “Transmission reach of optical-OFDM superchannels with 10–600 Gb/s for transparent bit-rate adaptive networks,” in Proc. of ECOC, 2011, Tu.3.K.2.
  15. S. Chandrasekhar, X. Liu, B. Zhu, and D. W. Peckham, “Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber,” in Proc. of ECOC, 2009, PD2.6.
  16. N. Patel, J. P. Jue, and T. Wang, “First shared path protection scheme for generalized network connectivity in gridless optical WDM networks,” in ACP 2010, 1–2 Dec. 2010, PD6.
  17. R. Huelsermann, M. Gunkel, C. Meusburger, and D. A. Schupke, “Cost modeling and evaluation of capital expenditures in optical multilayer networks,” J. Opt. Netw., vol. 7, no. 9, pp. 814–833, Sept.2008.
    [CrossRef]
  18. S. J. Savory, “Digital signal processing options in long haul transmission,” in Proc. of OFC/NFOEC, 2008, OTuO3.

2012 (1)

O. Gerstel, M. Jinno, A. Lord, and S. J. Yoo, “Elastic optical networking: A new dawn for the optical layer?” IEEE Commun. Mag., vol. 50, no. 2, pp. s12–s20, Feb.2012.
[CrossRef]

2011 (2)

2010 (2)

A. Nag, M. Tornatore, and B. Mukherjee, “Optical network design with mixed line rates and multiple modulation formats,” J. Lightwave Technol., vol. 28, pp. 466–475, 2010.
[CrossRef]

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

2008 (1)

Angelou, M.

K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

Bocoi, A.

A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.

Buchali, F.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

A. Klekamp, R. Dischler, and F. Buchali, “Transmission reach of optical-OFDM superchannels with 10–600 Gb/s for transparent bit-rate adaptive networks,” in Proc. of ECOC, 2011, Tu.3.K.2.

Bunge, C. A.

A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.

Cameron, C.

S. Poole, S. Frisken, M. A. Roelens, and C. Cameron, “Bandwidth-flexible ROADMs as network elements,” in Proc. of OFC, 2011, OTuE1.

Chandrasekhar, S.

S. Chandrasekhar, X. Liu, B. Zhu, and D. W. Peckham, “Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber,” in Proc. of ECOC, 2009, PD2.6.

Chong, A. F.

A. Morea, A. F. Chong, and O. Rival, “Impact of transparent network constraints on capacity gain of elastic channel spacing,” in OFC/NFOEC, 2011, JWA62.

Christodoulopoulos, K.

K. Christodoulopoulos, I. Tomkos, and E. A. Varvarigos, “Elastic bandwidth allocation in flexible OFDM-based optical networks,” J. Lightwave Technol., vol. 29, pp. 1354–1366, 2011.
[CrossRef]

K. Christodoulopoulos, K. Manousakis, and E. Varvarigos, “Reach adapting algorithms for mixed line rate WDM transport networks,” J. Lightwave Technol., vol. 29, no. 21, pp. 3350–3363, 2011.
[CrossRef]

K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

Dischler, R.

A. Klekamp, R. Dischler, and F. Buchali, “Transmission reach of optical-OFDM superchannels with 10–600 Gb/s for transparent bit-rate adaptive networks,” in Proc. of ECOC, 2011, Tu.3.K.2.

Frisken, S.

S. Poole, S. Frisken, M. A. Roelens, and C. Cameron, “Bandwidth-flexible ROADMs as network elements,” in Proc. of OFC, 2011, OTuE1.

Gerstel, O.

O. Gerstel, M. Jinno, A. Lord, and S. J. Yoo, “Elastic optical networking: A new dawn for the optical layer?” IEEE Commun. Mag., vol. 50, no. 2, pp. s12–s20, Feb.2012.
[CrossRef]

Glingener, C.

C. Glingener, “Optical networking trends and evolution,” in Proc. of OFC, 2011, OThAA1.

Gunkel, M.

Hirano, A.

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

Huelsermann, R.

Ji, P. N.

A. N. Patel, P. N. Ji, J. P. Jue, and T. Wang, “Survivable transparent flexible optical WDM (FWDM) networks,” in Proc. of OFC/NFOEC, 2011, OTuI2.

Jinno, M.

O. Gerstel, M. Jinno, A. Lord, and S. J. Yoo, “Elastic optical networking: A new dawn for the optical layer?” IEEE Commun. Mag., vol. 50, no. 2, pp. s12–s20, Feb.2012.
[CrossRef]

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

Jue, J. P.

A. N. Patel, P. N. Ji, J. P. Jue, and T. Wang, “Survivable transparent flexible optical WDM (FWDM) networks,” in Proc. of OFC/NFOEC, 2011, OTuI2.

N. Patel, J. P. Jue, and T. Wang, “First shared path protection scheme for generalized network connectivity in gridless optical WDM networks,” in ACP 2010, 1–2 Dec. 2010, PD6.

Klekamp, A.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

A. Klekamp, R. Dischler, and F. Buchali, “Transmission reach of optical-OFDM superchannels with 10–600 Gb/s for transparent bit-rate adaptive networks,” in Proc. of ECOC, 2011, Tu.3.K.2.

Klonidis, D.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.

Kozicki, B.

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

Liu, X.

S. Chandrasekhar, X. Liu, B. Zhu, and D. W. Peckham, “Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber,” in Proc. of ECOC, 2009, PD2.6.

Lord, A.

O. Gerstel, M. Jinno, A. Lord, and S. J. Yoo, “Elastic optical networking: A new dawn for the optical layer?” IEEE Commun. Mag., vol. 50, no. 2, pp. s12–s20, Feb.2012.
[CrossRef]

Manousakis, K.

Meusburger, C.

Morea, A.

A. Morea, A. F. Chong, and O. Rival, “Impact of transparent network constraints on capacity gain of elastic channel spacing,” in OFC/NFOEC, 2011, JWA62.

O. Rival and A. Morea, “Cost-efficiency of mixed 10-40-100 Gb/s networks and elastic optical networks,” in OFC/NFOEC, 2011, OTuI4.

Mukherjee, B.

A. Nag, M. Tornatore, and B. Mukherjee, “Optical network design with mixed line rates and multiple modulation formats,” J. Lightwave Technol., vol. 28, pp. 466–475, 2010.
[CrossRef]

Nag, A.

A. Nag, M. Tornatore, and B. Mukherjee, “Optical network design with mixed line rates and multiple modulation formats,” J. Lightwave Technol., vol. 28, pp. 466–475, 2010.
[CrossRef]

Patel, A. N.

A. N. Patel, P. N. Ji, J. P. Jue, and T. Wang, “Survivable transparent flexible optical WDM (FWDM) networks,” in Proc. of OFC/NFOEC, 2011, OTuI2.

Patel, N.

N. Patel, J. P. Jue, and T. Wang, “First shared path protection scheme for generalized network connectivity in gridless optical WDM networks,” in ACP 2010, 1–2 Dec. 2010, PD6.

Peckham, D. W.

S. Chandrasekhar, X. Liu, B. Zhu, and D. W. Peckham, “Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber,” in Proc. of ECOC, 2009, PD2.6.

Poole, S.

S. Poole, S. Frisken, M. A. Roelens, and C. Cameron, “Bandwidth-flexible ROADMs as network elements,” in Proc. of OFC, 2011, OTuE1.

Rambach, F.

A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.

Rival, O.

A. Morea, A. F. Chong, and O. Rival, “Impact of transparent network constraints on capacity gain of elastic channel spacing,” in OFC/NFOEC, 2011, JWA62.

O. Rival and A. Morea, “Cost-efficiency of mixed 10-40-100 Gb/s networks and elastic optical networks,” in OFC/NFOEC, 2011, OTuI4.

Roelens, M. A.

S. Poole, S. Frisken, M. A. Roelens, and C. Cameron, “Bandwidth-flexible ROADMs as network elements,” in Proc. of OFC, 2011, OTuE1.

Savory, S. J.

S. J. Savory, “Digital signal processing options in long haul transmission,” in Proc. of OFC/NFOEC, 2008, OTuO3.

Schupke, D. A.

R. Huelsermann, M. Gunkel, C. Meusburger, and D. A. Schupke, “Cost modeling and evaluation of capital expenditures in optical multilayer networks,” J. Opt. Netw., vol. 7, no. 9, pp. 814–833, Sept.2008.
[CrossRef]

A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.

Schuster, M.

A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.

Sone, Y.

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

Spinnler, B.

A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.

Takara, H.

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

Tanaka, T.

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

Tomkos, I.

K. Christodoulopoulos, I. Tomkos, and E. A. Varvarigos, “Elastic bandwidth allocation in flexible OFDM-based optical networks,” J. Lightwave Technol., vol. 29, pp. 1354–1366, 2011.
[CrossRef]

K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

Tornatore, M.

A. Nag, M. Tornatore, and B. Mukherjee, “Optical network design with mixed line rates and multiple modulation formats,” J. Lightwave Technol., vol. 28, pp. 466–475, 2010.
[CrossRef]

Varvarigos, E.

K. Christodoulopoulos, K. Manousakis, and E. Varvarigos, “Reach adapting algorithms for mixed line rate WDM transport networks,” J. Lightwave Technol., vol. 29, no. 21, pp. 3350–3363, 2011.
[CrossRef]

K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

Varvarigos, E. A.

Wang, T.

N. Patel, J. P. Jue, and T. Wang, “First shared path protection scheme for generalized network connectivity in gridless optical WDM networks,” in ACP 2010, 1–2 Dec. 2010, PD6.

A. N. Patel, P. N. Ji, J. P. Jue, and T. Wang, “Survivable transparent flexible optical WDM (FWDM) networks,” in Proc. of OFC/NFOEC, 2011, OTuI2.

Watanabe, A.

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

Yoo, S. J.

O. Gerstel, M. Jinno, A. Lord, and S. J. Yoo, “Elastic optical networking: A new dawn for the optical layer?” IEEE Commun. Mag., vol. 50, no. 2, pp. s12–s20, Feb.2012.
[CrossRef]

Zakynthinos, P.

K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.

Zhu, B.

S. Chandrasekhar, X. Liu, B. Zhu, and D. W. Peckham, “Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber,” in Proc. of ECOC, 2009, PD2.6.

IEEE Commun. Mag. (2)

O. Gerstel, M. Jinno, A. Lord, and S. J. Yoo, “Elastic optical networking: A new dawn for the optical layer?” IEEE Commun. Mag., vol. 50, no. 2, pp. s12–s20, Feb.2012.
[CrossRef]

M. Jinno, B. Kozicki, H. Takara, A. Watanabe, Y. Sone, T. Tanaka, and A. Hirano, “Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network,” IEEE Commun. Mag., vol. 48, no. 8, pp. 138–145, Aug.2010.
[CrossRef]

J. Lightwave Technol. (2)

J. Opt. Netw. (1)

J. Lightwave Technol. (1)

A. Nag, M. Tornatore, and B. Mukherjee, “Optical network design with mixed line rates and multiple modulation formats,” J. Lightwave Technol., vol. 28, pp. 466–475, 2010.
[CrossRef]

Other (12)

S. J. Savory, “Digital signal processing options in long haul transmission,” in Proc. of OFC/NFOEC, 2008, OTuO3.

S. Poole, S. Frisken, M. A. Roelens, and C. Cameron, “Bandwidth-flexible ROADMs as network elements,” in Proc. of OFC, 2011, OTuE1.

C. Glingener, “Optical networking trends and evolution,” in Proc. of OFC, 2011, OThAA1.

K. Christodoulopoulos, M. Angelou, D. Klonidis, P. Zakynthinos, E. Varvarigos, and I. Tomkos, “Value analysis methodology for flexible optical networks,” in Proc. of ECOC, 2011, We.10.P1.89.

M. Angelou, K. Christodoulopoulos, D. Klonidis, A. Klekamp, F. Buchali, E. Varvarigos, and I. Tomkos, “Spectrum, cost and energy efficiency in fixed-grid and flex-grid networks,” in Proc. of OFC/NFOEC, 2012, NM3F4.

A. Klekamp, R. Dischler, and F. Buchali, “Transmission reach of optical-OFDM superchannels with 10–600 Gb/s for transparent bit-rate adaptive networks,” in Proc. of ECOC, 2011, Tu.3.K.2.

S. Chandrasekhar, X. Liu, B. Zhu, and D. W. Peckham, “Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber,” in Proc. of ECOC, 2009, PD2.6.

N. Patel, J. P. Jue, and T. Wang, “First shared path protection scheme for generalized network connectivity in gridless optical WDM networks,” in ACP 2010, 1–2 Dec. 2010, PD6.

A. N. Patel, P. N. Ji, J. P. Jue, and T. Wang, “Survivable transparent flexible optical WDM (FWDM) networks,” in Proc. of OFC/NFOEC, 2011, OTuI2.

A. Bocoi, M. Schuster, F. Rambach, D. A. Schupke, C. A. Bunge, and B. Spinnler, “Cost comparison of networks using traditional 10 and 40 Gb/s transponders versus OFDM transponders,” in Proc. of OFC/NFOEC, 2008, OThB4.

A. Morea, A. F. Chong, and O. Rival, “Impact of transparent network constraints on capacity gain of elastic channel spacing,” in OFC/NFOEC, 2011, JWA62.

O. Rival and A. Morea, “Cost-efficiency of mixed 10-40-100 Gb/s networks and elastic optical networks,” in OFC/NFOEC, 2011, OTuI4.

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Figures (6)

Fig. 1
Fig. 1

(Color online) The spectrum utilization is presented for different networking solutions as a function of the average inter-node traffic demand.

Fig. 2
Fig. 2

(Color online) The required number of transponders is presented for different networking solutions as a function of the average inter-node traffic demand (in absolute numbers).

Fig. 3
Fig. 3

(Color online) The relative transponder cost for the fixed-grid networking solutions is presented as a function of the average inter-node traffic demand. Costs are normalized to the value of one 10 Gb/s transponder.

Fig. 4
Fig. 4

(Color online) The “break-even” cost for (a) E-OFDM and (b) O-OFDM transponders compared to the SLR 100G case is presented as a function of the normalized cost per 50 GHz channel slot under different traffic load settings. Costs are normalized to the value of a 10G transponder. Options A (solid line) and B (broken line) correspond to a cost value for a 100G transponder of 5.5 and 3.75 cost units, respectively. The additional cost of a flex-grid OXC over a fixed-grid OXC is set to 10%. Reference years 2014 and 2020 have average traffic values of approximately 50 Gb/s and 300 Gb/s, respectively. An annual growth rate of 34% is assumed for the traffic demand.

Fig. 5
Fig. 5

(Color online) The “break-even” cost for (a, b) E-OFDM and (c, d) O-OFDM transponders compared to the SLR 100G case is presented as a function of the additional cost of a flex-grid OXC over a fixed-grid OXC—under different traffic load settings. Options A (solid line) and B (broken line) correspond to a cost value for a 100G transponder of 5.5 and 3.75 cost units, respectively. Reference years 2014 and 2020 have average traffic values of approximately 50 Gb/s and 300 Gb/s, respectively. An annual growth rate of 34% is assumed for the traffic demand.

Fig. 6
Fig. 6

(Color online) The energy efficiency achieved for different networking solutions as a function of the average inter-node traffic demand.