Choudhury A. Al Sayeed

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While many scheduling algorithms have been proposed so far for input buffered crossbar switches, the challenge still remains to develop low complexity scheduling algorithms. These algorithms should be easy to implement and provide higher throughput and better utilization of switch space under both uniform and non-uniform traffic arrivals. In this paper, we(More)
The deployment of reconfigurable optical add/drop multiplexers (ROADMs) is going to change the conventional architecture for metro networks. In this paper, we present detailed features for transparent ring-to-ring interconnection in optical domain by using planar lightwave circuit (PLC)-based ROADMs. The proposed ring-to-ring interconnection features will(More)
Reconfigurable Optical Add/Drop Multiplexers (ROADMs) manufactured with different designs and technologies are soon going to be available in the market. Unfortunately, the latest available ROADM architectures are either suffering from high insertion losses or high manufacturing costs that prevent their rapid deployment in the network. In this paper, we(More)
Vector Quantization is one of the most powerful techniques used for speech and image compression at medium to low bit rates. Frequency Sensitive Competitive Learning algorithm (FSCL) is particularly effective for adaptive vector quantization in image compression systems. This paper presents a compression scheme for grayscale still images, by using this FSCL(More)
To alleviate the problems of network bottleneck in speed networks, it is important to have faster switching and certainly efficient scheduling algorithms. Optical switches are becoming more popular because of their faster switching speeds and higher reliability as compared to their electronic counterpart. Suitable scheduling algorithms are needed to be(More)
The Optical Virtual Private Networks (OVPNs) are going to be the next step of the present Internet Protocol or Multi-Protocol Label Switching-based VPNs. Since reliability and continuity of service are the major requirements in the design of OVPN, researchers are now paying more attention to its survivability issue. In this paper, we propose a highly simple(More)
The all-photonic overlaid star network (APOSN) provides a simple architecture for high-speed backbone networks using available optical technologies. We consider in this paper a distributed signaling and scheduling protocol to enable prompt responding and flexible control of traffic demands. A contention-based approach is used for bandwidth allocation, and(More)
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