MILP formulation for squeezed protection in Spectrum-Sliced Elastic Optical Path Networks

In Spectrum-Sliced Elastic Optical Path Networks (SLICE), the lightpath bandwidth is variable and can provide a finer granularity when compared to that of current optical path networks. Therefore, the virtual topology overlay on a physical topology must be designed considering new constraints and requirements to optimize the spectrum utilization, which has been recently investigated as a solution to a Mixed Integer Linear Program (MILP). In this paper we propose a mechanism that can provide both traffic survivability and efficient spectral utilization in SLICE networks by employing the spectrum flexibility and the novel concept of bandwidth sqeezing. A MILP formulation is presented that uses these new concepts to efficiently route the traffic in the network, while satisfying a committed bit-rate in the event of a failure. Cases studies are carried out in order to analyze the benefits of the proposal as well as the basic proprieties of the formulation.

[1]  Ioannis Tomkos,et al.  Routing and Spectrum Allocation in OFDM-Based Optical Networks with Elastic Bandwidth Allocation , 2010, 2010 IEEE Global Telecommunications Conference GLOBECOM 2010.

[2]  Y Sone,et al.  Bandwidth Squeezed Restoration in Spectrum-Sliced Elastic Optical Path Networks (SLICE) , 2011, IEEE/OSA Journal of Optical Communications and Networking.

[3]  Yi Pan,et al.  A study of the routing and spectrum allocation in spectrum-sliced Elastic Optical Path networks , 2011, 2011 Proceedings IEEE INFOCOM.

[4]  B. Mukherjee,et al.  A Review of Routing and Wavelength Assignment Approaches for Wavelength- Routed Optical WDM Networks , 2000 .

[5]  Masahiko Jinno,et al.  Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network [Topics in Optical Communications] , 2010, IEEE Communications Magazine.

[6]  Saswati Ghosh,et al.  Traffic Grooming in Optical WDM Mesh Networks , 2008, 2008 IEEE Region 10 and the Third international Conference on Industrial and Information Systems.

[7]  Wei Guo,et al.  On the spectrum-efficiency of bandwidth-variable optical OFDM transport networks , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[8]  Masahiko Jinno,et al.  Spectrum-efficient and scalable elastic optical path network: architecture, benefits, and enabling technologies , 2009, IEEE Communications Magazine.

[9]  H. Takara,et al.  Filtering characteristics of highly-spectrum efficient spectrum-sliced elastic optical path (SLICE) network , 2009, 2009 Conference on Optical Fiber Communication - incudes post deadline papers.

[10]  M. Jinno,et al.  Dynamic routing and frequency slot assignment for elastic optical path networks that adopt distance adaptive modulation , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[11]  Luying Zhou,et al.  Shared-path protection in OFDM-based optical networks with elastic bandwidth allocation , 2012, OFC/NFOEC.

[12]  Yi Zhang,et al.  Traffic grooming in Spectrum-Elastic Optical Path Networks , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[13]  Krzysztof Walkowiak,et al.  Routing and Spectrum Assignment in Spectrum Sliced Elastic Optical Path Network , 2011, IEEE Communications Letters.