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Optical Engineering

Controlled retransmission scheme for prioritized burst segmentation to support quality-of-service in optical burst switching networks
Author(s): Rui Hou; Tingting He; Tengyue Mao
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Paper Abstract

In optical burst switching (OBS) networks, burst contentions in OBS core nodes may cause data loss. To reduce this data loss, a retransmission scheme has been applied. However, uncontrolled retransmission may significantly increase network load and data loss probability, thus defeating the retransmission purpose. In addition, in a priority traffic existing OBS network, OBS nodes may apply different retransmission mechanisms to priority bursts for quality-of-service (QoS) support. We present a controlled retransmission scheme for prioritized burst segmentation to support QoS in OBS networks. Different from previous work in the literature, we set a different value to retransmission probability at each contention and propose a retransmission analytical model for a burst segmentation contention resolution scheme. In addition, we apply the proposed retransmission scheme to the prioritized burst segmentation for QoS support. We take into account the load at each link due to both the fresh and the retransmitted traffic and calculate the path-blocking probability and the byte loss probability for high-priority and low-priority bursts to evaluate the network performance. An extensive simulation is proposed to validate our analytical model.

Paper Details

Date Published: 1 October 2012
PDF: 7 pages
Opt. Eng. 51(10) 105003 doi: 10.1117/1.OE.51.10.105003
Published in: Optical Engineering Volume 51, Issue 10
Show Author Affiliations
Rui Hou, South-Central Univ. for Nationalities (China)
Tingting He, Nanjing Univ. of Posts and Telecommunications (China)
Tengyue Mao, South-Central Univ. for Nationalities (China)

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