Distribution-based bandwidth access scheme in slotted all-optical packet-switched networks |
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Authors: | Akbar Ghaffar Pour Rahbar Oliver WW Yang |
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Affiliation: | 1. Computer Networks Research Lab, Sahand University of Technology, Sahand New Town, Tabriz, Iran;2. CCNR Lab, University of Ottawa, Ottawa, ON, Canada;1. Gheorghe Asachi Technical University of Iasi, Faculty of Automatic Control and Computer Science, Str. Dimitrie Mangeron, Nr. 27, Iasi, 700050, Romania;2. Alexandru Ioan Cuza University of Iasi, Interdisciplinary Research Department and RAMTECH, Bd. Carol I, Nr. 11, Iasi, 700506, Romania;1. Department of Information Technology, College Of Engineering & Management, Kolaghat, India;2. Department of Computer science & Engineering, College Of Engineering & Management, Kolaghat, KTPP Township, Purba Medinipur 721171, West Bengal, India;3. Mechanical Operation (stage-II), Kolaghat Thermal Power Station, WBPDCL, Purba Medinipur 721137, West Bengal, India;1. School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, PR China;2. MOE Key Laboratory of Special Artificial Microstructure Materials and Technology, Pohl Institute of Solid State Physics, Tongji University, Shanghai 200092, PR China |
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Abstract: | The common approach in an ingress switch to access a slotted all-optical packet-switched network is the TTA (timer-based/threshold-based bandwidth access) bandwidth access scheme in which packet differentiation is provided by a time-out mechanism. In contrast, we propose in this paper the DA (distribution-based bandwidth access) to access the slotted all-optical packet-switched network within a DiffServ domain. Each torrent (the traffic between each pair of ingress and egress switches) is given a bandwidth measured in slots within a frame at an ingress switch. The slots from each torrent are evenly distributed throughout the frame and among the output wavelengths/fibers of the ingress switch. Comparing to the most commonly used technique TTA, we demonstrate that our DA approach can achieve the following: (1) provide each traffic torrent a fairer access to the network bandwidth; (2) reduce the probability of the slot drop rate at the optical network; (3) reduce the excessive bandwidth allocation by the bursty torrents; (4) balance the traffic load much better on wavelength channels; and (5) guarantee a stable edge switch operation to service traffic in which the traffic generation rate to the optical network is lower than the traffic service rate. |
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