TITLE:
Resource Allocation Using SPA Based on Different Cost Functions in Elastic Optical Networks
AUTHORS:
Mehdi Tarhani, Sanjib Sarkar, Morad Khosravi Eghbal, Mehdi Shadaram
KEYWORDS:
Elastic Optical Networks, Routing, Modulation, Spectrum Allocation, Cost Function, Shortest Path Algorithm
JOURNAL NAME:
Journal of Computer and Communications,
Vol.7 No.10,
October
11,
2019
ABSTRACT: Routing, modulation and spectrum allocation in elastic optical networks is a problem aiming at increasing the capacity of the network. Many algorithms such as shortest path algorithm can be used as the routing section of this problem. The efficiency of these algorithms is partly based on how the cost of each link is defined. In this study, we considered several basic metrics in cost of network links and compared their effects on the network capacity. In particular, the static costs and the dynamic costs were evaluated and compared. For dynamic scenarios, compared to static scenarios, at least one additional factor, the usage of the links, was added. We further considered a new factor that is based on probability of accommodating the signal at a given time in any given link. The results show that, among them, the shortest path algorithm provides the least blocking probability when the cost is a combination of link length and the abovementioned possibility/usage of the link.