Abstract

A real network with 1113 physical nodes and 1+1 protection is evaluated by varying the fraction of core/metro nodes to find the optimum network size regarding cost and power efficiency of elastic in comparison to mixed-line-rate (MLR) IP over dense wavelength-division multiplex networks. No significant benefit for any of the network concepts can be deduced, neither for a hierarchical/flat nor for a MLR/elastic network concept. On the other hand, the results confirmed that the use of the flex grid is beneficial for both MLR and elastic network scenarios.

© 2013 Optical Society of America

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  1. A. Klekamp, U. Gebhard, and F. Ilchmann, “Energy and cost efficiency of adaptive and mixed-line-rate IP over DWDM networks,” J. Lightwave Technol., vol.  30, no. 2, pp. 215–221, 2012.
    [CrossRef]
  2. A. Klekamp, U. Gebhard, and F. Ilchmann, “Efficiency of adaptive and mixed-line-rate IP over DWDM networks regarding CAPEX and power consumption,” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B11–B16, 2012.
    [CrossRef]
  3. C. Mizikakis, “The ‘TeraStream Approach’ - A means for the provision of cost efficiency and service integration,” presented at the Future Internet Assembly (FIA), Dublin, 2013.
  4. A. Nag, M. Tornatore, and B. Mukherjee, “Optical network design with mixed line rates and multiple modulation formats,” J. Lightwave Technol., vol.  28, no. 4, pp. 466–475, 2010.
    [CrossRef]
  5. A. Bocoi, “Reach-dependent capacity in optical networks enabled by OFDM,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2009, paper OMQ4.
  6. O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.
  7. F. Rambach, B. Konrad, L. Dembeck, U. Gebhard, M. Gunkel, M. Quagliotti, L. Serra, and V. Lopez, “A multi-layer cost model for metro/core networks,” J. Opt. Commun. Netw., vol.  5, no. 3, pp. 210–225, Mar. 2013.
    [CrossRef]
  8. A. Klekamp and U. Gebhard, “Performance of a real IP over DWDM network>1000 nodes regarding elastic and mixed-line-rate scenarios on a flexible frequency grid,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.7.
  9. L. Velasco, P. Wright, A. Lord, and G. Junyent, “How national IP/MPLS networks can benefit from flexgrid optical technology?” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.8.9.
  10. 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 European Conf. and Expo. on Optical Communications (ECOC), 2011, paper Tu3.K.2.

2013

2012

2010

Bocoi, A.

A. Bocoi, “Reach-dependent capacity in optical networks enabled by OFDM,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2009, paper OMQ4.

Buchali, F.

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 European Conf. and Expo. on Optical Communications (ECOC), 2011, paper Tu3.K.2.

Careglio, D.

O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.

Castro, A.

O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.

Dembeck, L.

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 European Conf. and Expo. on Optical Communications (ECOC), 2011, paper Tu3.K.2.

Fernández-Palacios, J.

O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.

Gebhard, U.

Gunkel, M.

Ilchmann, F.

Junyent, G.

O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.

L. Velasco, P. Wright, A. Lord, and G. Junyent, “How national IP/MPLS networks can benefit from flexgrid optical technology?” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.8.9.

Klekamp, A.

A. Klekamp, U. Gebhard, and F. Ilchmann, “Efficiency of adaptive and mixed-line-rate IP over DWDM networks regarding CAPEX and power consumption,” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B11–B16, 2012.
[CrossRef]

A. Klekamp, U. Gebhard, and F. Ilchmann, “Energy and cost efficiency of adaptive and mixed-line-rate IP over DWDM networks,” J. Lightwave Technol., vol.  30, no. 2, pp. 215–221, 2012.
[CrossRef]

A. Klekamp and U. Gebhard, “Performance of a real IP over DWDM network>1000 nodes regarding elastic and mixed-line-rate scenarios on a flexible frequency grid,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.7.

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 European Conf. and Expo. on Optical Communications (ECOC), 2011, paper Tu3.K.2.

Konrad, B.

Lopez, V.

Lord, A.

L. Velasco, P. Wright, A. Lord, and G. Junyent, “How national IP/MPLS networks can benefit from flexgrid optical technology?” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.8.9.

Mizikakis, C.

C. Mizikakis, “The ‘TeraStream Approach’ - A means for the provision of cost efficiency and service integration,” presented at the Future Internet Assembly (FIA), Dublin, 2013.

Mukherjee, B.

Nag, A.

Pedrola, O.

O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.

Quagliotti, M.

Rambach, F.

Serra, L.

Tornatore, M.

Velasco, L.

O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.

L. Velasco, P. Wright, A. Lord, and G. Junyent, “How national IP/MPLS networks can benefit from flexgrid optical technology?” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.8.9.

Wright, P.

L. Velasco, P. Wright, A. Lord, and G. Junyent, “How national IP/MPLS networks can benefit from flexgrid optical technology?” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.8.9.

J. Lightwave Technol.

J. Opt. Commun. Netw.

Other

C. Mizikakis, “The ‘TeraStream Approach’ - A means for the provision of cost efficiency and service integration,” presented at the Future Internet Assembly (FIA), Dublin, 2013.

A. Bocoi, “Reach-dependent capacity in optical networks enabled by OFDM,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2009, paper OMQ4.

O. Pedrola, L. Velasco, A. Castro, J. Fernández-Palacios, D. Careglio, and G. Junyent, “CAPEX study for grid dependent multi-layer IP/MPLS-over-EON using relative BV-WSS costs,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2012, paper NTu2J.7.

A. Klekamp and U. Gebhard, “Performance of a real IP over DWDM network>1000 nodes regarding elastic and mixed-line-rate scenarios on a flexible frequency grid,” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.7.

L. Velasco, P. Wright, A. Lord, and G. Junyent, “How national IP/MPLS networks can benefit from flexgrid optical technology?” in Optical Fiber Communication Conf. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), 2013, paper OTu3A.8.9.

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 European Conf. and Expo. on Optical Communications (ECOC), 2011, paper Tu3.K.2.

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Figures (14)

Fig. 1.
Fig. 1.

Redundant metro–core router connections.

Fig. 2.
Fig. 2.

Disjoint routing of IP links in WDM layer.

Fig. 3.
Fig. 3.

Modifying initial topology for optimization process.

Fig. 4.
Fig. 4.

Sample network topology of the IP layer (left) and detail of the physical layer (right).

Fig. 5.
Fig. 5.

Traffic flows in the network.

Fig. 6.
Fig. 6.

Optimized IP topologies for two core nodes.

Fig. 7.
Fig. 7.

Optimized IP topologies for five core nodes.

Fig. 8.
Fig. 8.

Optimized IP topologies for 10 core nodes.

Fig. 9.
Fig. 9.

Optimized IP topologies for 20 core nodes.

Fig. 10.
Fig. 10.

CAPEX versus number of core nodes for IP and WDM layer and MLR and elastic scenario for 2010 (top) and 2020 (bottom).

Fig. 11.
Fig. 11.

Power consumption versus number of core nodes for IP/WDM layer and MLR/elastic scenario for 2010 (top) and 2020 (bottom).

Fig. 12.
Fig. 12.

Number of line cards versus number of core nodes for IP/WDM layer and MLR/elastic scenario for 2010 (top) and 2020 (bottom).

Fig. 13.
Fig. 13.

Maximum (top) and mean (bottom) node capacities versus number of core nodes for 2020 scenario.

Fig. 14.
Fig. 14.

Mean and maximum number of used fibers per link versus number of core nodes for the IP/WDM layer and MLR/elastic scenario.