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—A number of schemes have been proposed for providing quality-of-service (QoS) differentiation in optical burst-switched (OBS) networks. Most existing schemes are based on a relative QoS model in which the service requirements for a given class of traffic are defined relative to the service requirements of another class of traffic. In this paper, we propose(More)
– In this paper we address the issue of contention resolution in optical burst switched networks, and we introduce an approach for reducing packet losses which is based on the concept of burst segmentation. In burst segmentation, rather than dropping the entire burst during contention, the burst may be broken into multiple segments, and only the overlapping(More)
In a single-hop WDM optical network, a straightforward approach to implementing multicasting is to schedule a single transmission to multiple destinations so that all of the desti-nations' receivers must tune to the same channel at the same time. Although scheduling a single transmission in this manner reduces the amount of transmitter and channel resources(More)
— In this paper, we address the online multicast traffic grooming problem in wavelength-routed WDM mesh networks with sparse grooming capability. We develop a multicast dynamic light-tree grooming algorithm (MDTGA) that can support multi-hop traffic grooming by taking advantage of light-trees. In this algorithm, a light-tree can be dropped, branched, and(More)
In this paper, we address the issue of providing differentiated services to IP packets over an optical burst-switched network. QoS is supported by introducing prioritized contention resolution policies in the network core and a new burst assembly technique at the network edge. In the core, contention is resolved through prioritized burst segmentation and(More)
— In optical burst-switched networks, data loss may occur when bursts contend for network resources. There have been several proposed solutions to resolve contentions in order to minimize loss. These localized contention resolution techniques react to contention, but do not address the more fundamental problem of congestion. Hence, there is a need for(More)
— Optical burst switching (OBS) has been proposed as a competitive hybrid switching technology to support the next-generation optical Internet. This paper addresses the problem of contention in OBS networks and introduces a new contention resolution algorithm called Look-ahead window Contention Resolution (LCR) that can also support service differentiation.(More)
Photonic slot routing has been proposed as an approach to implement an all-optical packet-switched network in a manner which is scalable and not overly complex. In photonic slot routing, packets are transmitted within a basic transport unit referred to as a photonic slot. The photonic slot is fixed in length and spans multiple wavelengths. Each photonic(More)