Optical Burst Switching (OBS) is a promising solution for all optical Wavelength Division Multiplexing (WDM) networks. It combines the benefits of both Optical Packet Switching (OPS) and Optical Circuit Switching (OCS). In this switching, data are transmitted in the form of bursts. Fairness is the main constraint in high-performance OBS network. In order to improve the fairness, a method known ...

Communication networks have emerged as a source of empowerment in today’s society. At the global level, the Internet is becoming the backbone of the modern economy. The new generations in developed countries cannot even conceive of a world without broadband access to the Internet. The inability of the current Internet infrastructure to cope with the wide variety and ever growing number of users...

A new dispersion map is designed for three-level code division multiplexing (3LCDM) of a 40 Gb/s (2 x 20 Gb/s) over 500 km (5 x 100km) standard single mode fiber. The results show that an 87.5 % dispersion compensation ratio was the optimum map for the 3LCDM system. The system performance is improved by 6 dB in optical signal-to-noise ratio, 6 dB in receiver sensitivity and 3 dB in self-phase m...

In this paper, we will discuss the wavelength requirement for optical networks based on wavelength-division multiplexing (WDM). A mathematical model, to represent the routing and wavelength assignment in optical networks with or without wavelength conversion, is described, and metrics are defined to express the performance. A new heuristic for routing and wavelength assignment is proposed and c...

We consider the routing and wavelength assignment (RWA) problem on wavelength division multiplexing (WDM) networks without wavelength conversion. When the physical network and required connections are given, RWA is the problem to select a suitable path and wavelength among the many possible choices for each connection such that no two paths using the same wavelength pass through the same link. ...

With wavelength division multiplexing (WDM) several optical signals can be transferred in a single optical ber [6][7]. This technology allows more e cient use of the huge capacity of an optical ber but also poses new network design and management problems, especially when wavelength conversion is not possible in the nodes. In this paper we consider the routing and wavelength assignment problem ...

Current optical networks are migrating to wavelength division multiplexing (WDM)-based fiber transport between traditional electronic multiplexers/demultiplexers, routers, and switches. Passive optical add–drop WDM networks have emerged but an optical data network that makes full use of the technologies of dynamic optical routing and switching exists only in experimental test-beds. This paper w...

The transmission capacity of a link in today’s optical networks has increased extensively due to wavelengthdivision-multiplexing (WDM) technology. Optical wavelength division multiplexing (WDM) networking technologies have delivered unprecedented terabit level bandwidth scalability over fiber-optic substrates. Optical-transmission techniques have been researched for quite some time. The field h...

ÐWith ever increasing demands on bandwidth from emerging bandwidth-intensive applications, such as video conferencing, E-commerce, and video-on-demand services, there has been an acute need for very high bandwidth transport network facilities. Optical networks are a promising candidate for this type of applications. At the same time, many bandwidth-intensive applications require multicast servi...

Achieving reliable communication over different wavelength channels and modes is one of the main goals Mode Division Multiplexing-Wavelength Multiplexing (MDM-WDM) transmission. The reliability can be described by minimum Signal to Noise Ratio (SNR) margin which depends on launch power, gain Few-Mode Erbium-Doped Fiber Amplifiers (FM-EDFA), nonlinear impairments (FMF). In this paper, we develop...