George Rouskas
North Carolina State University, College of Engineering, Faculty Member
Optical burst switching (OBS) is the most favourable switching paradigm for future all-optical networks. Burst assembly is the first process in OBS and it consists of aggregating clients packets into bursts. Assembled bursts wait for an... more
Optical burst switching (OBS) is the most favourable switching paradigm for future all-optical networks.
Burst assembly is the first process in OBS and it consists of aggregating clients packets into bursts. Assembled
bursts wait for an offset time before being transmitted to their intended destinations. Offset time is used
to allow burst control packet reserve required resources prior to burst arrival. Burst assembly process and
offset-time create extra delay in OBS networks. To make OBS suitable for real time applications, this extra
latency needs to be controlled. This paper proposes and evaluates a novel offset time and burst assembly
scheme to address this issue. Constant bit rate (CBR) traffic that has stringent end-to-end delay QoS requirements
is used in this study. The proposed scheme is called hybrid offset-time and burst assembly algorithm
(H-OTBA). The objective of the paper is achieved by controlling maximum burst transfer delay parameters
of CBR. The proposed scheme was evaluated via network simulation. Simulation results demonstrate
that, H-OTBA has effectively reduced end-to-end delay for CBR traffic compared with current solutions.
Burst assembly is the first process in OBS and it consists of aggregating clients packets into bursts. Assembled
bursts wait for an offset time before being transmitted to their intended destinations. Offset time is used
to allow burst control packet reserve required resources prior to burst arrival. Burst assembly process and
offset-time create extra delay in OBS networks. To make OBS suitable for real time applications, this extra
latency needs to be controlled. This paper proposes and evaluates a novel offset time and burst assembly
scheme to address this issue. Constant bit rate (CBR) traffic that has stringent end-to-end delay QoS requirements
is used in this study. The proposed scheme is called hybrid offset-time and burst assembly algorithm
(H-OTBA). The objective of the paper is achieved by controlling maximum burst transfer delay parameters
of CBR. The proposed scheme was evaluated via network simulation. Simulation results demonstrate
that, H-OTBA has effectively reduced end-to-end delay for CBR traffic compared with current solutions.
Research Interests:
Research Interests: Engineering, Technology, Computer Networks, Congestion Control, Packet Switching, and 16 moreTime Delay, Feedback, Traffic Flow, GNSS receivers, Scalability, Delays, Group, Packet Loss, Large Scale, UDP, Design and Implementation, Transport Protocols, Round Trip Time, Reliable Multicast, Internet, and Collaborative Computing
Research Interests:
Research Interests:
Optical layer multicast refers to the support of point-to-multipoint connections directly at the physical layer by employing passive devices capable of splitting the power of an input signal among several outputs. Optical multicast... more
Optical layer multicast refers to the support of point-to-multipoint connections directly at the physical layer by employing passive devices capable of splitting the power of an input signal among several outputs. Optical multicast technology enables a broad set of applications and opens new directions to network design. We examine the underlying principles and essential components for a practical optical multicast service. We also present a set of key research challenges along with a survey of the literature.
Research Interests:
Research Interests: Algorithms, Distributed Computing, Heuristics, Routing, Scheduling, and 20 morePacket scheduling, Packet Switching, Algorithm, Optimal mine design and scheduling, Broadcasting, Optimization, Network Design, Nodes, Optical network, Channels, Spectrum, Optical telecommunication, Tuning, Wavelength Division Multiplexing, Lower Bound, Boolean Satisfiability, Optimality Condition, Scheduling Algorithm, Intelligent Networks, and Transceivers
Traffic grooming refers to techniques used to combine low-speed traffic streams onto high-speed wavelengths in order to minimize the networkwide cost in terms of line terminating equipment and/or electronic switching. Such techniques... more
Traffic grooming refers to techniques used to combine low-speed traffic streams onto high-speed wavelengths in order to minimize the networkwide cost in terms of line terminating equipment and/or electronic switching. Such techniques become increasingly important for emerging network technologies, including SONET/WDM rings and MPLS/MPλS backbones, for which traffic grooming is essential. In this article we formally define the traffic grooming problem, and we provide a general formulation that captures the features of a wide range of problem variants. We then present a comprehensive comparative survey of the literature that unveils the significant amount of research on this subject (the traffic grooming past). We also offer a broad set of ambitious research directions (the traffic grooming future) that are motivated by the exciting new challenges arising with the advent of MPλS technology.
Research Interests:
Research Interests:
Research Interests: Distributed Computing, Service Quality, Optical switching, Quality of Service, Multicast, and 8 moreSignalling, Just in Time, Implementation, Network Architecture, Wavelength Division Multiplexing, Hardware Implementation of Algorithms, IEEE Communications Magazine, and Electrical And Electronic Engineering
Research Interests: Computer Science, Distributed Computing, Heuristics, Routing, Performance, and 15 morePacket Switching, Quality of Service, Bounded Variation, Real Time Systems, Real Time, Delays, Heuristic, Multicast Communication, MPEG enabled Multicast Routing, High speed networks, Interactive application, Bandwidth, Cost Function, Electrical And Electronic Engineering, and Application Software
Abstract In the past few years, there has been growing interest in wide area\ All Optical Networks" with wavelength division multiplexing (WDM), using wavelength routing. Due to the huge bandwidth inherent in... more
Abstract In the past few years, there has been growing interest in wide area\ All Optical Networks" with wavelength division multiplexing (WDM), using wavelength routing. Due to the huge bandwidth inherent in optical ber, and the use of WDM to match user and network bandwidths, the wavelength routing architecture is an attractive candidate for future backbone transport networks.