Routing and wavelength assignment (RWA) is a central issue to increase efficiency and reduce cost in Wavelength Division Multiplexing (WDM) optical networks. In this paper, we propose an improved scheme of wavelength assignment of parallel FFT communication pattern on a class of regular optical networks. With our new scheme, the numbers of wavelengths required to realize parallel FFT communicat...

We consider the problem of finding a lightpath assignment for a given set of communication requests on a multifiber WDM optical network with wavelength translators. Given such a network, andw the number of wavelengths available on each fiber, k the number of fiber per link and the number of partial wavelength translation available on each node, our problem stands for deciding whether it is poss...

In wavelength division multiplexed all optical networks; lightpath establishes a connection between sending and receiving nodes bypassing the electronic processing at intermediate nodes. One of the prime objectives of Routing and Wavelength Assignment (RWA) problem is to maximize the number of connections efficiently by choosing the best routes. Although there are several algorithms available, ...

This paper proposes a dynamic routing and wavelength assignment (RWA) scheme in multifiber WDM networks with wavelength conversion capability. In multifiber WDM networks, each link consists of multiple fibers. Thus, multiple lightpaths with the same wavelength can be established in the same link as long as they use different fibers. In WDM networks with wavelength conversion, the network nodes ...

This article proposes a survivability evaluation model for multifiber WDM networks, in which the extended layered graph is developed to jointly optimize the wavelength routing and wavelength assignment problems, and three different edge cost functions are evaluated in terms of traffic engineering. Linear programming (LP) equations are formulated to optimally determine the working lightpath and ...

This paper analyzes strategies for protection and restoration in a WDM network supporting two main classes of services. We refer to a scenario in which the optical network interacts with Multi-Protocol Label Switching (MPLS) based networks. We analyze routing, wavelength assignment, and protection/restoration issue. First the analysis is done at a pure optical level, handling the traffic with w...

The problem of Routing and Wavelength Assignment in Wavelength Division Multiplexing (WDM) optical networks consists in routing a set of lightpaths and assigning a wavelength to each of them, such that lightpaths whose routes share a common fiber are assigned to different wavelengths. When the objective is to minimize the total number of wavelengths used, this problem is NP-hard. The current st...

Normal optical networks can be identified the security issues like routing and wavelength assignment and physical layer attacks problems. Network Operators can be facing the risks at the frequency and wavelength allocation process. Physical layers attacks like high powered jamming of attacks can be occur inside the network. High power jamming of attacks can be provides the performance, scalabil...

A Wavelength Switched Optical Network (WSON) requires certain key information fields be made available to facilitate path computation and the establishment of Label Switched Paths (LSPs). The information model described in "Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks" (RFC 7446) shows what information is required at specific points in the WSON. P...

The blocking performance of an Optical Network can be improved with the help of alternate routing scheme and by wavelength conversion technique, but the later is not an economical proposition. Connection set -up time and blocking rate reduction are two important parameters for any optical data communication network. In the present work, traditional alternate routing and fuzzy logic based altern...