A Combined Delay-Throughput Fairness Model for Optical Burst Switched Networks
DOI:
https://doi.org/10.32890/jict2023.22.2.2Keywords:
OBS networks, delay fairness, throughput fairness, combination model, adaptive controlAbstract
Fairness is an important feature of communication networks. It is the distribution, allocation, and provision of approximately equal or
equal performance parameters, such as throughput, bandwidth, loss rate, and delay. In an optical burst switched (OBS) network, fairness is considered in three aspects: distance, throughput, and delay. Studies on these three types of fairness have been conducted; however, they have usually been considered in isolation. These fairness types should be considered together to improve the communication performance of the entire OBS network. This paper proposes a combined delay-throughput fairness model, where burst assembly and bandwidth allocation are improved to achieve both delay fairness and throughput fairness at ingress OBS nodes. The delay fairness and throughput fairness indices are recommended as metrics for adjusting the assembly queue length and allocated bandwidth for priority flows. The simulation results showed that delay and throughput fairness could be achieved simultaneously, improving the overall communication performance of the entire OBS network.
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