Dimensioning of survivable WDM networks

摘要

In this paper routing, planning of working capacity, rerouting,nand planning of spare capacity in wavelength division multiplexing (WDM)nnetworks are investigated. Integer linear programming (ILP) andnsimulated annealing (SA) are used as solution techniques. A complex costnmodel is presented. The spare capacity assignment is optimized withnrespect to three restoration strategies. The benefit of wavelengthnconversion, the choice of the fiber line system, and the influence ofncost parameter values are discussed, with respect to the differentnrestoration strategies and solution techniques. Wavelength conversion isnfound to be of limited importance, whereas tunability at the end pointsnof the connections has substantial benefits