This paper proposed and evaluated a programmable ROADM system for MCF-based SDM/WDM networks. The employing both bypass connection Route-and-Select wavelength switching enables adaptable virtual topology in optical networks by dynamically configuring cores. simulation results confirmed this could provide acceptable performance with an around 10–20% reduction the total cost including number of p...

Single-hop wavelength division multiplexing (WDM) optical ring networks operating in packet mode are a promising architecture for the design of innovate Metropolitan Area Networks (MANs). They allow a cost-effective design, with a good combination of optical and electronic technologies, while supporting features like restoration and reconfiguration that are essential in any metropolitan scenari...

The widespread deployment of WDM optical networks posts lots of new challenges for network designers. Traffic grooming is one of the most common problems. Efficient grooming of traffic can effectively reduce the overall cost of the network. But unfortunately, traffic grooming problems have been shown to be NP-hard. Therefore, new heuristics must be devised to tackle them. Among these approaches...

It is difficult to predict future traffic precisely although it is assumed that the amount of future traffic is predictable in many researches on a multi-period planning for WDM networks. In this paper, we propose a wavelength-routing algorithm that maximizes the number of accommodated lightpaths without precise prediction of future traffic demand. Since our algorithm reduces the number of leas...

We describe a protocol to construct optical multicast trees in lambdaswitched networks running PIM-SM. Based on the MPLS architecture, the protocol maps a multicast tree constructed by PIM-SM onto point-to-multipoint LSPs that are connected to form an equivalent WDM multicast tree. LSP set-up request is receiver-initiated in the protocol. A mechanism to collect information about the capability ...

Because optical wavelength division multiplexing (WDM) networks are expected to be realized for building up backbone in the near future, multicasting in WDM networks needs to be addressed for various network applications. This paper studies an extended multicast routing and wavelength assignment (RWA) problem called multicast routing and wavelength assignment with delay constraint (MRWA-DC) tha...

ILIA BALDINE. Dynamic Recon guration in WDM Networks. (Under the direction of Dr. George N. Rouskas and Dr. Yannis Viniotis.) In this research we study the problems associated with dynamic recon guration of broadcast WDM networks. Adaptability to the changing tra c conditions is viewed as one of the key features of multiwavelength optical networks, and this is the rst comprehensive in-depth stu...

In a telecommunication network, Routing and Wavelength Assignment (RWA) is the problem of finding lightpaths for incoming connection requests. When facing dynamic traffic, greedy assignment to requests based on predefined deterministic policies leads fragmented network that cannot make use its full capacity due stranded bandwidth. At this point service providers try recover via defragmentation ...