Waveband switching (WBS) has only recently attracted attention from the optical networking industry for its practical importance in reducing port count, the associated control complexity, and cost of optical cross-connects (OXCs). However, WBS-related problems of theoretical interest have not been addressed thoroughly by the research community and many issues are still wide open. In particular,...

The problem of establishing lightpath between a given source-destination pair through routing and assigning wavelength to the route is known as routing and wavelength assignment (RWA) problem. In this paper, we have proposed a set of distributed algorithms for dynamic RWA problem in WDM All-optical networks. We have made a comparative study of different distributed algorithms in terms of blocki...

Wavelength-routed networks exploit the tremendous bandwidth of optical fibers and allow for optical routing of packets thus making end-to-end delay much lower. In this paper we discuss some of the protocol issues that have to be dealt with such that Internet applications can smoothly run over wavelength-routed access networks. Topics addressed include routing and lightpath assignment, latency r...

In this paper, a novel fuzzy approach is developed while solving the Dynamic Routing and Wavelength Assignment (DRWA) problem in optical networks with Wavelength Division Multiplexing (WDM). In this work, the effect of nonlinear and linear impairments such as Four Wave Mixing (FWM) and amplifier spontaneous emission (ASE) noise are incorporated respectively. The novel algorithm incorporates fuz...

Dense WDM technologies make effective use of the vast fiber bandwidth and offer an added dimension to all-optical networks. Wavelength conversion at key network nodes is emerging as a fundamental functionality that can allow transparent interoperability, contention resolution, wavelength routing, and, in general, better utilization of the network resources under dynamic traffic patterns. In thi...

Wavelength division multiplexing (WDM) has been considered a promising transmission technology in optical communication networks. With the continuous advance in optical technology, WDM network will play an important role in wide area backbone networks. Optical wavelength switching, compared with optical packet switching, is a more mature and more cost-effective choice for optical switching tech...

Routing and Wavelength Assignment (RWA) in an arbitrary mesh network is an NP-complete problem. So far, this problem has been solved by linear programming for network topologies with a few nodes, and sub-optimally solved for larger networks by heuristic strategies and the application of optimization algorithms such as Genetic Algorithms (GA), Particle Swarm Optimization (PSO), Differential Evol...

In optical networks, a connection is used to transmit data between source and destination nodes via lightpaths. The optical signal transmitted along a lightpath requires cross-connect switches (OXCs) and telecommunication carriers to switch high-speed optical signals in a fiber optic network. As a signal propagates from the source to the destination, the signal quality is continuously degraded ...

The ever increasing demand for higher bandwidth due to the growth of bandwidth intensive applications such as video-on-demand, video conferencing, on-line banking, on-line auction and other multimedia applications motivated the search for alternatives to traditional electronic networks. Optical Burst Switching (OBS) is one such paradigm developed to handle the future bandwidth demands for next-...

We consider the routing and the wavelength assignment (RWA) of scheduled and random lightpath demands in a wavelength switching mesh network without wavelength conversion functionality. Scheduled lightpath demands (SLDs) are connection demands for which the set-up and tear-down times are known in advance as opposed to random lightpath demands (RLDs) which are dynamically established and release...