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...

With the increasing popularity of bandwidth-intensive applications, network traffic has been growing exponentially. Wavelength Division Multiplexing (WDM) is a technique that can harness the huge bandwidth available in an optical fiber to satisfy the network demand. Due to the multiplicity of the connections on any single link, fault tolerance is of utmost importance in such WDM networks. Activ...

Due to the rapid growth of Internet and multimedia services, broadband fiber access technologies, such as Passive Optical Networks (PONs), come to the forefront of the research field. Network service providers mostly deploy Time Division Multiplexed (TDM)-PON everywhere in the world. In order to mitigate the future demand, researchers have investigated some nextgeneration PON systems, such as W...

This study introduces the scalability problem of many WDMA protocols for ring networks. We present a slotted access protocol and a scalable network architecture suitable for WDM ring metropolitan area networks. Each node is equipped with a pair of tunable transceivers to communicate exploiting all the fiber data wavelengths. Also, each node uses a pair of fixed tuned transceivers to exchange co...

Blocking probability has been one of the significant parameters in the design of WDM optical networks. In most of the network topologies the probability for each link to be occupied is different. There are always some links which are more likely to be used than others which can be denoted as key links. The existing routing algorithms do not take this important factor into account significantly....

Optical Fiber technology employing wavelength-division multiplexing (WDM) has and continues to be investigated and commercially deployed to meet our ever-increasing bandwidth demands. WDM partitions the huge bandwidth of an optical fiber into many non-overlapping wavelength channels, each of which can operate at the data rate of 10 Gbps (or 40 Gbps or higher). This dissertation investigates des...

Optical wavelength division multiplexing (WDM) networking technology has been identified as a suitable candidate for future wide area network (WAN) environments, due to its potential ability to meet rising demands of high bandwidth and low latency communication. Networking protocols and algorithms are being developed to meet the changing operational requirements in future optical WANs (OWAN). S...

The need for on-demand provisioning of wavelength routed channels with service differentiated offerings within the transport layer has become more essential due to the recent emergence of high bit rate IP network applications such as multimedia conferencing systems, video on demand systems, real-time control systems, etc. Diverse optical transport network architectures have been proposed in ord...

We present our proposed designs of optical access architecture based on WDM technology toward new-generation networks for two types of topologies: Single-star (SS) and passive-double-star (PDS). We adopt the concept of WDM-direct which links multiple wavelengths to each optical network unit (ONU). Our proposed architecture based on WDM-direct can achieve more than 10 Gbps access per ONU. Moreov...

Since the issue of finding optimal signal routes imposes itself as one of the main challenges within the framework of optimal networks, this paper aims at illustrating the development of a new, mixed-integer mathematical model for solving the static routing and wavelength assignment (RWA) problem in optical WDM networks and presents the comparison of results obtained by heuristics and CPLEX com...