Multimedia streams have diierent requirements than those of traditional data traac, especially in terms of bandwidth; these requirements have to be taken into account when routing such streams. WDM local-area networks with tunable transceivers have an additional degree of freedom over their electronic counterparts: their topology can be dynamically changed. In this paper, we study the problem o...

Metropolitan telecommunications networks is a recent network concept imported from the data communication world, which is gaining considerable importance in present/near future networks. The emerging of optical transport networks (OTN) which uses Wavelength division multiplexing (WDM), associated to the concept of all-optical networking is shaping the evolution scenarios for the Metropolitan ne...

Absfmcr As WDM-based optical networks are becoming the right choice for the next-generation Internet networks to transport high-speed IP traflic, the leading role of wireless ATM (WATM) networks will be undoubtedly replaced with wireless WDM (WWDM) networks for providing high quality of services to mobile users. Meanwhile, multicasting has played an increasingly important a e in many convention...

This study extends the analysis in [1] where the effect of the round trip propagation delay on performance measures of an Asynchronous Transmission WDMA protocol is examined for infinite population and Poisson arrivals. An other attribute, associated with the WDM networks, that affects their behaviour is the receiver collision phenomenon. Especially this paper examines the influence on throughp...

In this paper architectural considerations for deployment of ultra-wideband (14501650 nm) WDM networks having a massive number of WDM channels (400-1,000), are presented. The fundamental networking building block is an all-optical ring comprised by ultra-wideband WDM Passive Optical Networks (PONs) interconnected via a suitable optical cross-connect. Each PON could aggregate traffic from hundre...

A novel bandwidth assignment algorithm in WDM Ethernet Passive Optical Networks, called DyWaS-SLA, is proposed not only to provide service differentiation but also to offer subscriber differentiation. Simulation results show that DyWaS-SLA outperforms other bandwidth allocation algorithms in WDM-EPONs as it makes fairer bandwidth distribution than those methods. Consequently, it always insures ...

In this paper, methods to alleviate the problem of internal blocking in interconnection networks based on WDM are studied. In an ordinary 8x8 Omega network, only 10% of all permutations are permissible in one pass, and it gets worse with larger switches. However, using WDM technology, the performance of these networks can be improved. In this paper, several architectures based on Omega network ...

This paper examines two methods of multiple access for optical networks: code-division and wavelength division. Two approaches are given for analyzing code-division systems, and an overview of a proposal for a WDM network will be summarized. Since the maturity of the technologies necessary for such systems diier, the usefulness of a direct comparison between CDMA and WDM is limited; instead, th...

In current WDM networks, it is possible to support hundreds of WDM channels on a single fiber. Therefore, the cost of the transmitters and the receivers, and hence the number of light paths, is becoming the main factor in determining the cost of a WDM network. Researchers tried to keep the number of light paths required to implement a topology as low as possible. This paper presents a restorabl...

A realistic energy-oriented model is necessary to formally characterize the energy consumption and the consequent carbon footprint of actual and future high-capacity WDM networks. The energy model describes the energy consumption of the various network elements (NE) and predicts their energy consumption behavior under different traffic loads and for the diverse traffic types, including all opti...