A framework of prioritized burst segmentation supporting controlled retransmission in OBS networks |
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| Affiliation: | 1. College of Computer Science, South-Central University for Nationalities, Wuhan, China;2. Computer School, Nanjing University of Posts and Telecommunications, Nanjing, China;1. Department of Electrical and Electronics Engineering, University of Istanbul, Istanbul, Turkey;2. Department of Electronics and Communications Engineering, Dogus University, Kadikoy, Istanbul, Turkey;3. Department of Electronics and Communication Engineering, Istanbul Technical University, Istanbul, Turkey;1. Department of Electronics and Telecommunication Engineering, Meghnad Saha Institute of Technology, Techno Complex, Madurdaha, Kolkata 700 150, India;2. S.K. Mitra Centre for Research in Space Environment, Institute of Radio Physics and Electronics, University of Calcutta, Kolkata 700 009, India;1. Informatics and Information Security Research Center (BİLGEM), Turkish Scientific and Technological Research Council (TÜBİTAK), 41470 Gebze, Kocaeli, Turkey;2. Department of Electronics Engineering, Gebze Institute of Technology, 41400 Gebze, Kocaeli, Turkey |
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| Abstract: | In optical burst switching (OBS) networks, burst contentions in OBS core nodes may cause data loss. To reduce data loss, retransmission scheme has been applied. However, uncontrolled retransmission may increase network load significantly and data loss probability defeating the retransmission purpose. In addition, in a priority traffic existing OBS network, OBS nodes may apply different retransmission mechanisms to priorities bursts for quality-of-service (QoS) support. This study has developed a controlled retransmission scheme for prioritized burst segmentation to support QoS in OBS networks. Unlike previous works in the literature, we have set a different value to retransmission probability at each contention and propose a retransmission analytical model for burst segmentation contention resolution scheme. In addition, we have applied the proposed retransmission scheme to the prioritized burst segmentation for QoS support. We have taken into account the load at each link due to both fresh and retransmitted traffic, and have calculated the path blocking probability and byte loss probability (ByLP) for high-priority and low-priority burst to evaluate network performance. An extensive simulation has been proposed to validate our analytical model. |
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| Keywords: | Optical burst switching network Prioritized burst segmentation Burst retransmission QoS |
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