Diptish Dey

An All-Optical WDM Packet-Switched Network Architecture with Support for Group Communication

The so-called media convergence to the Internet is foreseen. As a consequence of this convergence, MANs will face new demands not only in terms of bandwidth, but also in terms of services. To meet these new demands, new MAN architectures are required. WDM-based MAN architectures that tackle the first problem are available not only in the literature, but also on the market. In this paper we deal with the second problem. Specifically, we describe a novel WDM-based MAN architecture that supports group communication, a service that is expected to increase considerably as new applications converge to the Internet. Based on packet switching, the architecture supports both point-to-point and point-to-multipoint communication in the optical domain.

Supporting IP dense mode multicast routing protocols in WDM all-optical networks

Recent developments in all-optical networking and wavelength division multiplexing technologies allow for the support of optical multicasting, a missing feature towards the optical Internet. In this paper we propose a protocol to construct source-rooted WDM multicast trees. The protocol works under dense mode multicasting routing IP protocols and supports network nodes with different degrees of light splitting, wavelength conversion, and add/drop capabilities.

MAC Protocol of a Next-Generation MAN Architecture Based on WDM and All-Optical Packet Switching

As media converge to the Internet, MANs will face new demands not only in terms of bandwidth, but also in terms of services. We describe a next generation MAN architecture that has been designed within Dutch project Flamingo. Based on all-optical packet switching, this architecture supports one-to-one, one-to-many and many-to-one communications in the optical domain. Specifically, we focus on the MAC layer of the network. We describe the access and fairness protocols and explain how the all-optical nature of the architecture affects the design of these protocols. We also discuss some performance results that have been obtained via simulation.

A Preemptable Slotted Access Protocol to Transport Variable Size Packets in All-Optical Ring Lans/Mans

We describe a slotted access protocol that employs pre-emption to transport variable size packets. A node tries to transmit a packet using as many consecutive slots as possible. If a node detected a busy slot coming before it finished the transmission of a packet, that node will transmit until the current slot is full and will then stop. The node will resume transmission upon arrival of an empty slot.