Abstract

Optimization of IP over DWDM networks is studied under constraints of cost (CAPEX) and energy consumption. Realistic IP traffic mapped to the optical DWDM layer together with leased L1/L2 lines form the basic traffic load which is expanded by a factor of 33 and 100 for a 10-year projection. General power and cost savings are taken into account for the 2020 scenarios. The DWDM core network (Germany 50) is analyzed for mixed-line-rate and reach/bandwidth adaptive scenarios; the latter is realized by optical orthogonal frequency division multiplexing (O-OFDM). Although the adaptive scenario shows to be more hardware efficient in terms of total number of transponders, the mixed-line-rate approach has slight advantages regarding cost and power. Moreover, a hierarchical network can show benefits in cost and power consumption compared to a network without restrictions in routing at high traffic loads.

© 2011 IEEE

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  3. A. Nag, M. Tornatore, B. Mukherjee, "Optical network design with mixed line rates and multiple modulation formats," J. Lightw. Technol. 28, 466-475 (2010).
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  16. K. Christodoulopoulos, I. Tomkos, E. A. Vararigos, "Elastic bandwidth allocation in flexible OFDM-based optical networks," J. Lightw. Technol. 29, 1354-1366 (2011).
  17. A. Klekamp, R. Dischler, F. Buchali, "Transmission reach of optical-OFDM superchannels with 10–600 Gb/s for transparent bit-rate adaptive networks," Proc. Eur. Conf. Opt. Commun. (ECOC) (2011).
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  19. A. N. Patel, P. N. Ji, J. P. Jue, T. Wang, "Defragmentation of transparent flexible optical WDM (FWDM) networks," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2011).
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2011 (2)

W. Shieh, "OFDM for flexible high-speed optical networks," J. Lightw. Technol. 29, 1560-1577 (2011).

K. Christodoulopoulos, I. Tomkos, E. A. Vararigos, "Elastic bandwidth allocation in flexible OFDM-based optical networks," J. Lightw. Technol. 29, 1354-1366 (2011).

2010 (3)

G. Eilenberger, "Energy efficient transport for the future Internet," Bell Labs Tech. J. 15, 147-167 (2010).

M. Jinno, "Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path (SLICE) network," IEEE Commun. Mag. 48, 138-145 (2010).

A. Nag, M. Tornatore, B. Mukherjee, "Optical network design with mixed line rates and multiple modulation formats," J. Lightw. Technol. 28, 466-475 (2010).

2009 (1)

M. Jinno, H. Takara, B. Kozicki, Y. Tsukishima, Y. Sone, S. Matsuoka, "Spectrum-efficient and scalable elastic optical path network: Architecture, benefits, and enabling technologies," IEEE Commun. Mag. 47, 66-73 (2009).

2008 (2)

J. Berthold, A. A. M. Saleh, L. Blair, J. M. Simmons, "Optical networking: Past, present, and future," J. Lightw. Technol. 26, 1104-1118 (2008).

A. Morea, "QoT function and A* routing: An optimized combination for connection search in translucent networks," OSA J. Opt. Netw. 7, 42-61 (2008).

Bell Labs Tech. J. (1)

G. Eilenberger, "Energy efficient transport for the future Internet," Bell Labs Tech. J. 15, 147-167 (2010).

IEEE Commun. Mag. (2)

M. Jinno, H. Takara, B. Kozicki, Y. Tsukishima, Y. Sone, S. Matsuoka, "Spectrum-efficient and scalable elastic optical path network: Architecture, benefits, and enabling technologies," IEEE Commun. Mag. 47, 66-73 (2009).

M. Jinno, "Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path (SLICE) network," IEEE Commun. Mag. 48, 138-145 (2010).

J. Lightw. Technol. (4)

J. Berthold, A. A. M. Saleh, L. Blair, J. M. Simmons, "Optical networking: Past, present, and future," J. Lightw. Technol. 26, 1104-1118 (2008).

K. Christodoulopoulos, I. Tomkos, E. A. Vararigos, "Elastic bandwidth allocation in flexible OFDM-based optical networks," J. Lightw. Technol. 29, 1354-1366 (2011).

W. Shieh, "OFDM for flexible high-speed optical networks," J. Lightw. Technol. 29, 1560-1577 (2011).

A. Nag, M. Tornatore, B. Mukherjee, "Optical network design with mixed line rates and multiple modulation formats," J. Lightw. Technol. 28, 466-475 (2010).

OSA J. Opt. Netw. (1)

A. Morea, "QoT function and A* routing: An optimized combination for connection search in translucent networks," OSA J. Opt. Netw. 7, 42-61 (2008).

Other (12)

B. Kozicki, "1 Tb/s optical path aggregation with spectrum-sliced elastic optical path network SLICE," Proc. Eur. Conf. Opt. Commun. (ECOC) (2009).

A. Klekamp, F. Buchali, R. Dischler, "Comparison of DWDM network topologies with bit-rate adaptive optical OFDM regarding restoration," Eur. Conf. Opt. Commun. (ECOC) (2010).

A. Bocoi, "Reach-dependent capacity in optical networks enabled by OFDM," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2009).

A. Klekamp, O. Rival, A. Morea, R. Dischler, F. Buchali, "Transparent WDM network with bitrate tunable optical OFDM transponders," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2010).

A. N. Patel, P. N. Ji, J. P. Jue, T. Wang, "First shared path protection scheme for generalized network connectivity in gridless optical WDM networks," Proc. Asian Commun. Photon. Conf. and Exhibit. (APC) (2010).

N. Amaya, "Experimental demonstration of a gridless multi-granular optical network supporting flexible spectrum switching," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2011).

K. Christodoulopoulos, I. Tomkos, E. A. Varvarigos, "Routing and spectrum allocation in OFDM-based optical networks with elastic bandwidth allocation," Proc. IEEE Global Telecommun. Conf. (IEEE GLOBECOM) (2010).

A. N. Patel, P. N. Ji, J. P. Jue, T. Wang, "Survivable transparent flexible optical WDM (FWDM) networks," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2011).

T. Takagi, "Dynamic routing and frequency slot assignment for elastic optical path networks that adopt distance adaptive modulation," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2011).

A. Klekamp, R. Dischler, F. Buchali, "Transmission reach of optical-OFDM superchannels with 10–600 Gb/s for transparent bit-rate adaptive networks," Proc. Eur. Conf. Opt. Commun. (ECOC) (2011).

A. N. Patel, P. N. Ji, J. P. Jue, T. Wang, "Defragmentation of transparent flexible optical WDM (FWDM) networks," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2011).

O. Rival, A. Morea, "Cost-efficiency of mixed 10-40-100 Gb/s networks and elastic optical networks," Proc. Opt. Fiber Commun./Nat. Fiber Opt. Eng. Conf. (OFC/NFOEC) (2011).

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