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2013 International Conference on Information Networking (ICOIN)
QoS-aware hierarchical token bucket (QHTB) queuing disciplines for QoS-guaranteed Diffserv provisioning with optimized bandwidth utilization and priority-based preemption
Bangkok Thailand
January 28-January 30
ISBN: 978-1-4673-5740-1
Chang-Hwan Lee, Dept. of Information and Communication Engineering, Graduate School, Yeungnam University, Korea
Young-Tak Kim, Dept. of Information and Communication Engineering, Graduate School, Yeungnam University, Korea
In most commercial IP routers, the traffic engineering is not fully supporting the optimized bandwidth sharing for QoS-guaranteed DiffServ provisioning with optimized bandwidth sharing that dynamically redistributes any unused bandwidth to backlogged flows and provides fast fault restoration with priority-based preemption. In this paper, we propose a QoS-aware hierarchical token bucket (QHTB) queuing discipline for QoS-guaranteed DiffServ provisioning. Each end-to-end aggregated traffic flow that includes realtime traffic and non-realtime traffic is described by traffic parameters, and link bandwidth is allocated according to the traffic parameters. If extra available bandwidth is available, it is re-distributed according to the predefined rates and backlog status. As a prototyping of the proposed architecture, we modified the hierarchical token bucket (HTB) kernel module in Linux IP/MPLS router. The performances of the proposed QoS-aware HTB (QHTB) in various traffic conditions have been analyzed with a series of systematic experiments. From the experimental results, we verified that the proposed QHTB provides optimized bandwidth utilization with guaranteed QoS provisioning for time-sensitive realtime service classes, while optimized bandwidth sharing among throughput-sensitive non-realtime service classes. Performance analysis of fast fault restorations with priority-based preemption is also provided that gives us some guidelines to efficiently schedule bandwidth sharing for i) QoS-guaranteed differentiated realtime service provisioning, ii) optimized bandwidth sharing with dynamic reallocation of unused bandwidth, and iii) fast fault restoration with priority-based preemption.
Index Terms:
Hierarchical Token Bucket (HTB),Traffic Engineering,DiffServ,Bandwidth Sharing
Citation:
Chang-Hwan Lee, Young-Tak Kim, "QoS-aware hierarchical token bucket (QHTB) queuing disciplines for QoS-guaranteed Diffserv provisioning with optimized bandwidth utilization and priority-based preemption," icoin, pp.351-358, 2013 International Conference on Information Networking (ICOIN), 2013
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