Volume 12, Number 5

A Retrial Queueing Model with Scheduling Admission Control in QoS Supporting
for FDL-equipped at OBS Core Node


Dang Thanh Chuong1, Nguyen Hong Quoc1, Doan Van Thang2 and Pham Trung Duc1, 1Hue University, Vietnam, 2Industrial University of HCM City, Vietnam


Optical burst switching (OBS) is being considered as an optical transmission technology that meets the increasing bandwidth demands and requirements of quality of service (QoS) of the next generation alloptical Internet. Due to technological limitations such as optical buffers are not yet available at core nodes, ensuring QoS in OBS networks is difficult to perform flexibly compared to electronic networks (e.g. IP network). In this paper, a combination of the prediction based on burst traffic and fibre delay links (FDL) is proposed to allocate wavelengths properly, ensuring QoS and improving the network performance. Efficiency evaluations based on mathematical analysis and simulation will confirm the advantages of our proposed model.


OBS, Quality of Services (QoS), Share-Per- Link (SPL), Fiber Delay Lines (FDL), Retrial Queueing.