Risk reduction based survivable WDM network design

— This paper presents an investment strategy to reduce the risk associated with failures in Wavelength Division Multiplexing (WDM) optical networks. The investment strategy determines how to allocate a fixed budget for implementing survivability techniques in different parts of the network such that the Expected Loss of Traffic (ELT) is minimized. Two survivability schemes are considered in this paper: dedicated link protection and dedicated path protection. Two analytical techniques for evaluating network unavailability and ELT are presented in this paper: a fault tree analysis and an event tree. Based on the event tree approach, we propose a novel Mixed Integer Linear Programming (MILP) formulation for the investment strategy problem. Numerical results illustrating the investment strategy for both link and path protection are presented and discussed.

• Type: Conference
• Year: 2006
• Where: IPCCC
• Authors: K. Vajanapoom, David Tipper
• Keywords: Event Tree, Investment Strategy, IPCCC 2006, Path Protection