Abstract

We present a lab-trial of the designed and implemented path computation architecture for multi-domain translucent wavelength switched optical networks (WSON), using hierarchical Path Computation Elements (H-PCE). The approach is based on the dynamic aggregation of the domain topologies, represented as a virtual link meshes at a higher level, in order to perform dynamic domain sequence selection. We detail the extended path computation procedures, involving both domain selections considering inter domain links and segment expansions which are impairment-aware, along with the proposed control plane protocol extensions. We validate the approach with the overall performance of the end to end path computation latency, highlighting the benefits of parallelization.

© 2011 OSA

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References

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  1. A. Farrel, J. P. Vasseur, and J. Ash, “A path computation element (PCE)-based architecture,” IETF RFC 4655 (2006), http://tools.ietf.org/html/rfc4655 .
  2. J. P. Vasseur, R. Zhang, N. Bitar, and J. L. Le Roux, “A BRPC procedure to compute shortest constrained inter-domain TE label switched path,” IETF RFC 5441 (2009), http://tools.ietf.org/html/rfc5441 .
  3. D. King, A. Farrel, Q. Zhao, and F. Zhang, “The application of the PCE architecture to the determination of a sequence of domains in MPLS and GMPLS,” Internet-Draft, draft-king-pce-hierarchy-fwk (work in progress), http://tools.ietf.org/html/draft-king-pce-hierarchy-fwk-06 .
  4. R. Casellas, R. Muñoz, and R. Martínez, “Lab trial of multi-domain path computation in GMPLS controlled WSON using a hierarchical PCE,” in Optical Fiber Communication Conference and Exposition and National Fiber Optic Engineers Conference (OFC/NFOEC 2011), Technical Digest (CD) (Optical Society of America, 2011), paper OThI5, http://www.opticsinfobase.org/abstract.cfm?URI=OFC-2011-OThI5 .
  5. R. Martinez, R. Casellas, R. Muñoz, and T. Tsuritani, “Experimental translucent-oriented routing for dynamic lightpath provisioning in GMPLS-enabled wavelength switched optical networks,” J. Lightwave Technol. 28(8), 1241–1255 (2010).
    [CrossRef]
  6. J. P. Vasseur and J. L. Le Roux, eds., “Path computation element (PCE) communication protocol (PCEP),” IETF RFC 5440 (2009), http://tools.ietf.org/html/rfc5440 .
  7. F. Zhang, Q. Zhao, O. González de Dios, R. Casellas, and D. King, “Extensions to path computation element communication protocol for hierarchical PCE,” Internet-Draft, draft-zhang-pce-hierarchy-extensions-00 (work in progress), http://tools.ietf.org/html/draft-zhang-pce-hierarchy-extensions-00 .
  8. M. Chen, R. Zhang, and X. Duan, “OSPF extensions in support of inter-autonomous system (AS) MPLS and GMPLS traffic engineering,” IETF RFC 5392 (2009), http://tools.ietf.org/html/rfc5392 .
  9. R. Muñoz, R. Martinez, and R. Casellas, “Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signalling,” IEEE Commun. Mag. 47(8), 26–34 (2009).
    [CrossRef]
  10. CTTC Optical Networking Area GMPLS Control Plane Emulator wiki, http://wikiona.cttc.es/ona/index.php/GMPLS_Control_Plane_Emulator_with_PCE .

2010 (1)

2009 (1)

R. Muñoz, R. Martinez, and R. Casellas, “Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signalling,” IEEE Commun. Mag. 47(8), 26–34 (2009).
[CrossRef]

Casellas, R.

R. Martinez, R. Casellas, R. Muñoz, and T. Tsuritani, “Experimental translucent-oriented routing for dynamic lightpath provisioning in GMPLS-enabled wavelength switched optical networks,” J. Lightwave Technol. 28(8), 1241–1255 (2010).
[CrossRef]

R. Muñoz, R. Martinez, and R. Casellas, “Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signalling,” IEEE Commun. Mag. 47(8), 26–34 (2009).
[CrossRef]

Martinez, R.

R. Martinez, R. Casellas, R. Muñoz, and T. Tsuritani, “Experimental translucent-oriented routing for dynamic lightpath provisioning in GMPLS-enabled wavelength switched optical networks,” J. Lightwave Technol. 28(8), 1241–1255 (2010).
[CrossRef]

R. Muñoz, R. Martinez, and R. Casellas, “Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signalling,” IEEE Commun. Mag. 47(8), 26–34 (2009).
[CrossRef]

Muñoz, R.

R. Martinez, R. Casellas, R. Muñoz, and T. Tsuritani, “Experimental translucent-oriented routing for dynamic lightpath provisioning in GMPLS-enabled wavelength switched optical networks,” J. Lightwave Technol. 28(8), 1241–1255 (2010).
[CrossRef]

R. Muñoz, R. Martinez, and R. Casellas, “Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signalling,” IEEE Commun. Mag. 47(8), 26–34 (2009).
[CrossRef]

Tsuritani, T.

IEEE Commun. Mag. (1)

R. Muñoz, R. Martinez, and R. Casellas, “Challenges for GMPLS lightpath provisioning in transparent optical networks: Wavelength constraints in routing and signalling,” IEEE Commun. Mag. 47(8), 26–34 (2009).
[CrossRef]

J. Lightwave Technol. (1)

Other (8)

J. P. Vasseur and J. L. Le Roux, eds., “Path computation element (PCE) communication protocol (PCEP),” IETF RFC 5440 (2009), http://tools.ietf.org/html/rfc5440 .

F. Zhang, Q. Zhao, O. González de Dios, R. Casellas, and D. King, “Extensions to path computation element communication protocol for hierarchical PCE,” Internet-Draft, draft-zhang-pce-hierarchy-extensions-00 (work in progress), http://tools.ietf.org/html/draft-zhang-pce-hierarchy-extensions-00 .

M. Chen, R. Zhang, and X. Duan, “OSPF extensions in support of inter-autonomous system (AS) MPLS and GMPLS traffic engineering,” IETF RFC 5392 (2009), http://tools.ietf.org/html/rfc5392 .

A. Farrel, J. P. Vasseur, and J. Ash, “A path computation element (PCE)-based architecture,” IETF RFC 4655 (2006), http://tools.ietf.org/html/rfc4655 .

J. P. Vasseur, R. Zhang, N. Bitar, and J. L. Le Roux, “A BRPC procedure to compute shortest constrained inter-domain TE label switched path,” IETF RFC 5441 (2009), http://tools.ietf.org/html/rfc5441 .

D. King, A. Farrel, Q. Zhao, and F. Zhang, “The application of the PCE architecture to the determination of a sequence of domains in MPLS and GMPLS,” Internet-Draft, draft-king-pce-hierarchy-fwk (work in progress), http://tools.ietf.org/html/draft-king-pce-hierarchy-fwk-06 .

R. Casellas, R. Muñoz, and R. Martínez, “Lab trial of multi-domain path computation in GMPLS controlled WSON using a hierarchical PCE,” in Optical Fiber Communication Conference and Exposition and National Fiber Optic Engineers Conference (OFC/NFOEC 2011), Technical Digest (CD) (Optical Society of America, 2011), paper OThI5, http://www.opticsinfobase.org/abstract.cfm?URI=OFC-2011-OThI5 .

CTTC Optical Networking Area GMPLS Control Plane Emulator wiki, http://wikiona.cttc.es/ona/index.php/GMPLS_Control_Plane_Emulator_with_PCE .

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Figures (6)

Fig. 1
Fig. 1

(a) H-PCE deployment model: single p-pce and one c-pce per domain. (b) Multi-domain parent aggregated topology view (left) and detailed child domain 12 topology view (right).

Fig. 2
Fig. 2

(a) H-PCE multi-domain path computation procedure. (b) Detailed PCEP capture for an end to end path computation.

Fig. 3
Fig. 3

Random 50-node topology used to evaluate virtual mesh aggregation latency c-pce → p-pce.

Fig. 4
Fig. 4

Multi-domain network topology, composed of 4 translucent optical domains (Autonomous Systems).

Fig. 5
Fig. 5

End-to-end average path computation delay based on parallelization (parent threads) and intra-domain path latency (intra domain child algorithm).

Fig. 6
Fig. 6

Histogram for the path computation latency in the 4-domain network, OSNR-aware algorithm with 3R allocation and full parallelization.

Tables (1)

Tables Icon

Table 1 Virtual mesh domain aggregation latency, Intel Core2 Duo E8400 3.00GHz, 50-node random graph

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