Abstract

A path computation element (PCE) is briefly defined as a control plane functional component (physical or logical) that is able to perform constrained path computation on a graph representing (a subset of) a network. A stateful PCE is a PCE that is able to consider the set of active connections, and its development is motivated by the fact that such knowledge enables the deployment of improved, more efficient algorithms. Additionally, a stateful PCE is said to be active if it is also able to affect (modify or suggest the modification of) the state of such connections. A stateful active PCE is thus able not only to use the knowledge of the active connections as available information during the computation, but also to reroute existing ones, resulting in a more efficient use of resources and the ability to dynamically arrange and reoptimize the network. An OpenFlow controller is a logically centralized entity that implements a control plane and configures the forwarding plane of the underlying network devices using the OpenFlow protocol. From a control plane perspective, an OpenFlow controller and the aforementioned stateful PCE have several functions in common, for example, in what concerns network topology or connection management. That said, both entities also complement each other, since a PCE is responsible mainly for path computation accessible via an open, standard, and flexible protocol, and the OpenFlow controller assumes the task of the actual data plane forwarding provisioning. In other words, the stateful PCE becomes active by virtue of relying on an OpenFlow controller for the establishment of connections. In this framework, the integration of both entities presents an opportunity allowing a return on investment, reduction of operational expenses, and reduction of time to market, resulting in an efficient approach to operate transport networks. In this paper, we detail the design, implementation, and experimental evaluation of a centralized control plane based on a stateful PCE, acting as an OpenFlow controller, targeting the control and management of optical networks. We detail the extensions to both the OpenFlow and the PCE communication protocol (PCEP), addressing the requirements of elastic optical networks as well as the system performance, obtained when deployed in a laboratory trial.

© 2013 Optical Society of America

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  1. A. Farrel, J.-P. Vasseur, and J. Ash, “A path computation element (PCE)-based architecture,” (informational), Aug. 2006 [Online]. Available: http://www.ietf.org/rfc/rfc4655.txt .
  2. E. Crabbe, J. Medved, I. Minei, and R. Varga, “PCEP extensions for stateful PCE,” IETF Internet Draft, draft-ietf-pce-stateful-pce-03, Mar. 22, 2013, work in progress [Online]. Available: http://tools.ietf.org/html/draft-ietf-pce-stateful- pce-03.txt .
  3. X. Zhang and I. Minei, Eds., “Applicability of PCEP extensions for stateful PCE,” IETF Internet Draft, draft-zhang-pce-stateful-pce-app-03, Feb. 22, 2003, work in progress [Online]. Available: http://tools.ietf.org/id/draft-zhang-pce-stateful-pce-app-03.txt .
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  5. L. Liu, T. Tsuritani, I. Morita, H. Guo, and J. Wu, “Experimental validation and performance evaluation of OpenFlow-based wavelength path control in transparent optical networks,” Opt. Express, vol.  19, no. 27, pp. 26578–26593, Dec. 2011.
    [CrossRef]
  6. S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.
  7. F. Paolucci, F. Cugini, N. Hussain, F. Fresi, and L. Poti, “OpenFlow-based flexible optical networks with enhanced monitoring functionalities,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), 2012, paper Tu.1.D.5.
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  9. A. Giorgetti, F. Cugini, F. Paolucci, and P. Castoldi, “OpenFlow and PCE architectures in wavelength switched optical networks,” in 16th Int. Conf. on Optical Network Design and Modeling (ONDM), 2012, pp. 1–6.
  10. R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.
  11. L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.
  12. L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.
  13. Y. Zhao, J. Zhang, H. Yang, and Y. Yu, “Which is more suitable for the control over large scale optical networks, GMPLS or OpenFlow?” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper NTu3F.2.
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  17. L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
    [CrossRef]
  18. M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.
  19. J. Lang, “Link management protocol (LMP),” (proposed standard), Oct. 2005, updated by RFC 6898 [Online]. Available: http://www.ietf.org/rfc/rfc4204.txt .
  20. R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
    [CrossRef]
  21. R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

2013 (2)

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
[CrossRef]

2012 (1)

2011 (1)

Amaya, N.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Ash, J.

A. Farrel, J.-P. Vasseur, and J. Ash, “A path computation element (PCE)-based architecture,” (informational), Aug. 2006 [Online]. Available: http://www.ietf.org/rfc/rfc4655.txt .

Autenrieth, A.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Azodolmolky, S.

S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.

Casellas, R.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
[CrossRef]

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.

Castoldi, P.

A. Giorgetti, F. Cugini, F. Paolucci, and P. Castoldi, “OpenFlow and PCE architectures in wavelength switched optical networks,” in 16th Int. Conf. on Optical Network Design and Modeling (ONDM), 2012, pp. 1–6.

Channegowda, M.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Crabbe, E.

E. Crabbe, J. Medved, I. Minei, and R. Varga, “PCEP extensions for stateful PCE,” IETF Internet Draft, draft-ietf-pce-stateful-pce-03, Mar. 22, 2013, work in progress [Online]. Available: http://tools.ietf.org/html/draft-ietf-pce-stateful- pce-03.txt .

Cugini, F.

A. Giorgetti, F. Cugini, F. Paolucci, and P. Castoldi, “OpenFlow and PCE architectures in wavelength switched optical networks,” in 16th Int. Conf. on Optical Network Design and Modeling (ONDM), 2012, pp. 1–6.

F. Paolucci, F. Cugini, N. Hussain, F. Fresi, and L. Poti, “OpenFlow-based flexible optical networks with enhanced monitoring functionalities,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), 2012, paper Tu.1.D.5.

Efstathiou, N.

S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.

Elbers, J.-P.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Escalona, E.

S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.

Fabrega, J. M.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

Farrel, A.

A. Farrel, J.-P. Vasseur, and J. Ash, “A path computation element (PCE)-based architecture,” (informational), Aug. 2006 [Online]. Available: http://www.ietf.org/rfc/rfc4655.txt .

Fresi, F.

F. Paolucci, F. Cugini, N. Hussain, F. Fresi, and L. Poti, “OpenFlow-based flexible optical networks with enhanced monitoring functionalities,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), 2012, paper Tu.1.D.5.

Giorgetti, A.

A. Giorgetti, F. Cugini, F. Paolucci, and P. Castoldi, “OpenFlow and PCE architectures in wavelength switched optical networks,” in 16th Int. Conf. on Optical Network Design and Modeling (ONDM), 2012, pp. 1–6.

Guo, H.

Hussain, N.

F. Paolucci, F. Cugini, N. Hussain, F. Fresi, and L. Poti, “OpenFlow-based flexible optical networks with enhanced monitoring functionalities,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), 2012, paper Tu.1.D.5.

Jayakumar, R.

S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.

Kaczmarek, P.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Kostecki, P.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Lang, J.

J. Lang, “Link management protocol (LMP),” (proposed standard), Oct. 2005, updated by RFC 6898 [Online]. Available: http://www.ietf.org/rfc/rfc4204.txt .

Liu, L.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
[CrossRef]

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

L. Liu, T. Tsuritani, I. Morita, H. Guo, and J. Wu, “Experimental validation and performance evaluation of OpenFlow-based wavelength path control in transparent optical networks,” Opt. Express, vol.  19, no. 27, pp. 26578–26593, Dec. 2011.
[CrossRef]

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.

Martinez, R.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

Martínez, R.

L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
[CrossRef]

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.

R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.

Medved, J.

E. Crabbe, J. Medved, I. Minei, and R. Varga, “PCEP extensions for stateful PCE,” IETF Internet Draft, draft-ietf-pce-stateful-pce-03, Mar. 22, 2013, work in progress [Online]. Available: http://tools.ietf.org/html/draft-ietf-pce-stateful- pce-03.txt .

Minei, I.

E. Crabbe, J. Medved, I. Minei, and R. Varga, “PCEP extensions for stateful PCE,” IETF Internet Draft, draft-ietf-pce-stateful-pce-03, Mar. 22, 2013, work in progress [Online]. Available: http://tools.ietf.org/html/draft-ietf-pce-stateful- pce-03.txt .

Moreolo, M. S.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

Morita, I.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
[CrossRef]

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

L. Liu, T. Tsuritani, I. Morita, H. Guo, and J. Wu, “Experimental validation and performance evaluation of OpenFlow-based wavelength path control in transparent optical networks,” Opt. Express, vol.  19, no. 27, pp. 26578–26593, Dec. 2011.
[CrossRef]

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.

R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.

Muñoz, R.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
[CrossRef]

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.

R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.

Nejabati, R.

S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Paolucci, F.

A. Giorgetti, F. Cugini, F. Paolucci, and P. Castoldi, “OpenFlow and PCE architectures in wavelength switched optical networks,” in 16th Int. Conf. on Optical Network Design and Modeling (ONDM), 2012, pp. 1–6.

F. Paolucci, F. Cugini, N. Hussain, F. Fresi, and L. Poti, “OpenFlow-based flexible optical networks with enhanced monitoring functionalities,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), 2012, paper Tu.1.D.5.

Peng, S.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Poti, L.

F. Paolucci, F. Cugini, N. Hussain, F. Fresi, and L. Poti, “OpenFlow-based flexible optical networks with enhanced monitoring functionalities,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), 2012, paper Tu.1.D.5.

Rashidfard, M.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Simeonidou, D.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.

Tsuritani, T.

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

L. Liu, R. Muñoz, R. Casellas, T. Tsuritani, R. Martínez, and I. Morita, “Openslice: An OpenFlow-based control plane for spectrum sliced elastic optical path networks,” Opt. Express, vol.  21, no. 4, pp. 4194–4204, 2013.
[CrossRef]

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “GMPLS/PCE control of flexi-grid DWDM optical networks using CO-OFDM transmission [invited],” J. Opt. Commun. Netw., vol.  4, no. 11, pp. B1–B10, Nov. 2012.
[CrossRef]

L. Liu, T. Tsuritani, I. Morita, H. Guo, and J. Wu, “Experimental validation and performance evaluation of OpenFlow-based wavelength path control in transparent optical networks,” Opt. Express, vol.  19, no. 27, pp. 26578–26593, Dec. 2011.
[CrossRef]

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.

R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.

Varga, R.

E. Crabbe, J. Medved, I. Minei, and R. Varga, “PCEP extensions for stateful PCE,” IETF Internet Draft, draft-ietf-pce-stateful-pce-03, Mar. 22, 2013, work in progress [Online]. Available: http://tools.ietf.org/html/draft-ietf-pce-stateful- pce-03.txt .

Vasseur, J.-P.

A. Farrel, J.-P. Vasseur, and J. Ash, “A path computation element (PCE)-based architecture,” (informational), Aug. 2006 [Online]. Available: http://www.ietf.org/rfc/rfc4655.txt .

Vilalta, R.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Wu, J.

Yang, H.

Y. Zhao, J. Zhang, H. Yang, and Y. Yu, “Which is more suitable for the control over large scale optical networks, GMPLS or OpenFlow?” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper NTu3F.2.

Yu, Y.

Y. Zhao, J. Zhang, H. Yang, and Y. Yu, “Which is more suitable for the control over large scale optical networks, GMPLS or OpenFlow?” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper NTu3F.2.

Zervas, G.

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

Zhang, J.

Y. Zhao, J. Zhang, H. Yang, and Y. Yu, “Which is more suitable for the control over large scale optical networks, GMPLS or OpenFlow?” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper NTu3F.2.

Zhao, Y.

Y. Zhao, J. Zhang, H. Yang, and Y. Yu, “Which is more suitable for the control over large scale optical networks, GMPLS or OpenFlow?” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper NTu3F.2.

IEEE J. Sel. Areas Commun. (1)

R. Casellas, R. Muñoz, J. M. Fabrega, M. S. Moreolo, R. Martinez, L. Liu, T. Tsuritani, and I. Morita, “Design and experimental validation of a GMPLS/PCE control plane for elastic CO-OFDM optical networks,” IEEE J. Sel. Areas Commun., vol.  31, no. 1, pp. 49–61, Jan. 2013.

J. Opt. Commun. Netw. (1)

Opt. Express (2)

Other (17)

S. Azodolmolky, R. Nejabati, E. Escalona, R. Jayakumar, N. Efstathiou, and D. Simeonidou, “Integrated OpenFlow GMPLS control plane: an overlay model for software defined packet over optical networks,” in 37th European Conf. and Exhibition on Optical Communication (ECOC), 2011, paper Tu.5.K.5.

F. Paolucci, F. Cugini, N. Hussain, F. Fresi, and L. Poti, “OpenFlow-based flexible optical networks with enhanced monitoring functionalities,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), 2012, paper Tu.1.D.5.

J. Vasseur and J. L. Roux, Eds., “Path computation element (PCE) communication protocol (PCEP),” (proposed standard), Mar. 2009 [Online]. Available: http://www.ietf.org/rfc/rfc5440.txt .

A. Giorgetti, F. Cugini, F. Paolucci, and P. Castoldi, “OpenFlow and PCE architectures in wavelength switched optical networks,” in 16th Int. Conf. on Optical Network Design and Modeling (ONDM), 2012, pp. 1–6.

R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, and I. Morita, “An integrated stateful PCE/OpenFlow controller for the control and management of flexi-grid optical networks,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper OW4G.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Interworking between OpenFlow and PCE for dynamic wavelength path control in multi-domain WSON,” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Los Angeles, CA, Mar. 2012, paper OM3G.2.

L. Liu, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, and R. Muñoz, “Experimental demonstration of an OpenFlow/PCE integrated control plane for IP over translucent WSON with the assistance of a per-request-based dynamic topology server,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Tu.1.D.3.

Y. Zhao, J. Zhang, H. Yang, and Y. Yu, “Which is more suitable for the control over large scale optical networks, GMPLS or OpenFlow?” in Optical Fiber Communication Conf. and Expo. and the Nat. Fiber Optic Engineers Conf. (OFC/NFOEC), Anaheim, CA, Mar. 2013, paper NTu3F.2.

“Spectral grids for WDM applications: DWDM frequency grid,” , in force, Feb. 2012 [Online]. Available: http://www.itu.int/rec/T-REC-G.694.1/ .

“Architecture of optical transport networks,” , in force, Oct. 2012 [Online]. Available: http://www.itu.int/rec/T-REC-G.872 .

“Unified functional architecture of transport networks,” , in force, Feb. 2012 [Online]. Available: http://www.itu.int/rec/T-REC-G.800 .

A. Farrel, J.-P. Vasseur, and J. Ash, “A path computation element (PCE)-based architecture,” (informational), Aug. 2006 [Online]. Available: http://www.ietf.org/rfc/rfc4655.txt .

E. Crabbe, J. Medved, I. Minei, and R. Varga, “PCEP extensions for stateful PCE,” IETF Internet Draft, draft-ietf-pce-stateful-pce-03, Mar. 22, 2013, work in progress [Online]. Available: http://tools.ietf.org/html/draft-ietf-pce-stateful- pce-03.txt .

X. Zhang and I. Minei, Eds., “Applicability of PCEP extensions for stateful PCE,” IETF Internet Draft, draft-zhang-pce-stateful-pce-app-03, Feb. 22, 2003, work in progress [Online]. Available: http://tools.ietf.org/id/draft-zhang-pce-stateful-pce-app-03.txt .

Open Networking Foundation (ONF), “OpenFlow Protocol Specification v1.0,” 2009 [Online]. Available: http://www.opennetworking.org .

M. Channegowda, R. Nejabati, M. Rashidfard, S. Peng, N. Amaya, G. Zervas, D. Simeonidou, R. Vilalta, R. Casellas, R. Martínez, R. Muñoz, L. Liu, T. Tsuritani, I. Morita, A. Autenrieth, J.-P. Elbers, P. Kostecki, and P. Kaczmarek, “First demonstration of an OpenFlow based software-defined network employing packet, fixed and flexible DWDM grid technologies on an international multi-domain testbed,” in 38th European Conf. and Exhibition on Optical Communication (ECOC), Amsterdam, The Netherlands, Sept. 2012, paper Th.3.D.2.

J. Lang, “Link management protocol (LMP),” (proposed standard), Oct. 2005, updated by RFC 6898 [Online]. Available: http://www.ietf.org/rfc/rfc4204.txt .

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Figures (10)

Fig. 1.
Fig. 1.

Different models for the integration of a PCE and an OpenFlow controller. (a) External, with the PCE decoupled from the OpenFlow controller. (b) The PCE acts as an application and should query for the TED and LSPDB. (c) Integrated, where both components share the same instance of the databases. PCC, path control client.

Fig. 2.
Fig. 2.

Block diagram of the integrated stateful PCE and OpenFlow controller. The PCEP protocol is used as a northbound interface and a modified OFP for programming the ROADMs.

Fig. 3.
Fig. 3.

Diagram of the OpenFlow agent that connects to the OpenFlow controller and configures the underlying optical hardware using a hardware abstraction library.

Fig. 4.
Fig. 4.

Message flow for the initial OpenFlow handshake with capability and features negotiation. Note that when an OpenFlow connection is first established, each side of the connection sends an OFPT_HELLO message with the supported OpenFlow version.

Fig. 5.
Fig. 5.

Wireshark capture showing the OpenFlow FEATURES_REPLY message included in the initial handshake between the controller located at 84.88.62.83 and an OpenFlow agent located at node 10.1.1.120.

Fig. 6.
Fig. 6.

Different modes of operation for cross-connecting: (a) serialized and (b) parallel.

Fig. 7.
Fig. 7.

14-node Japan core topology with emulated optical hardware for the performance evaluation.

Fig. 8.
Fig. 8.

(a) Wireshark captures using the 14-node network showing PCEP and OFP extensions. For PCEP, data path identifiers have been configured to match IPv4 addresses of the form 10.0.50.x. (b) For the CFLOW_MOD message, the capture shows the encoding the slices that configure the allocated frequency slot.

Fig. 9.
Fig. 9.

Obtained blocking probability (percent) when flow arrivals follow a Poisson point process, with requests randomly selected between distinct node pairs. The demand bandwidth profile is random, mapped to a CO-OFDM transmission requiring 1) from 1 to 16 slices and 2) always 16 slices. Measurements obtained using 104 requests per data point, with average interarrival time set to 3 s, and exponential holding time set depending on the offered traffic in erlangs.

Fig. 10.
Fig. 10.

Histogram of the connection setup delay for a total of 1000 connections when a serialized setup is used, with a configured hardware emulated delay of 50 ms. The spikes correspond to each of the possible path hop counts.