We propose a novel WDM aware weight function for solving the Routing and Wavelength Assignment (RWA) problem in optical WDM networks taking into consideration factors like number of used wavelengths , availability of free wavelengths and route length jointly under dynamic traffic conditions. The performance of proposed routing strategy is studied in combination with first-fit, and most used wav...

In this paper, we consider routing and wavelength assignment in wavelength-routed all-optical networks with circuit-switching. The conventional approaches to address this issue consider the two aspects of the problem sequentially by rst nding a route from a predetermined set of candidate paths and then searching for an appropriate wavelength assignment. We adopt a more general approach in which...

This study aims at highlighting the Routing and Wavelength Assignment (RWA) problems in WDM Optical networks and describes the Routing Algorithms and their performance comparison. Since routing decisions play an important role in evaluating the blocking performance of a network it is critical to choose a wavelength assignment scheme that should take into account its compatibility with the chose...

We face the Routing and Wavelength Assignment problem considering as constraints the physical impairments that arise in all-optical networks. We propose a simple model for the physical layer considering both static and dynamic impairments. It is based on simulation of signal propagation in order to characterize each lightpath with a reliability parameter.

In this paper, we consider the Routing and Wavelength Assignment (RWA) problem in Wavelength Division Multiplexing (WDM) networks. Firstly, we propose separate linear programming (LP) formulations for the lightpath routing and the wavelength assignment subproblems. Then, an iterative algorithm that integrates both formulations is also proposed for solving the complete RWA problem. The objective...

IYER, VIJAY R. A Simulation Study of Wavelength Assignment and Reservation Policies with Signaling Delays. (Under the direction of Professor George N. Rouskas). This thesis studies the effect of non-negligible signaling delays on the performance of wavelength-assignment heuristics, wavelength reservation schemes, routing schemes, holding time (average being 1/μ) of the lightpaths and traffic lo...

Routing and wavelength assignment for online real-time multicast connection setup is a difficult task due to the dynamic change of availabilities of wavelengths and the consideration of wavelength conversion delay in wavelength division multiplexing (WDM) networks. This paper presents a distributed routing and wavelength assignment scheme for the setup of real-time multicast connections. It int...