ON SURVIVABLE DESIGN IN LIGHT TRAIL OPTICAL NETWORKS

The recently proposed light trail architecture offers a promising candidate for carrying IP centric traffic over optical networks. In this paper, we first give a brief introduction to the light trail architecture, then focus on the optimal design of survivable light trail optical network. Two protection schemes, namely connection based protection and link based protection, that can achieve 100% protection against single link failure are proposed and compared. The survivable light trail design problem using connection based protection model is formulated as an integer linear programming (ILP) optimization problem. The numerical results obtained from solving our ILP formulation are presented and show that the design achieves high wavelength utilization as well as 100% protection again single link failure.

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