Analysis and simulation of a fair queueing algorithm
SIGCOMM '89 Symposium proceedings on Communications architectures & protocols
Link-sharing and resource management models for packet networks
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Hierarchical packet fair queueing algorithms
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Explicit allocation of best-effort packet delivery service
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Providing guaranteed services without per flow management
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Proportional differentiated services: delay differentiation and packet scheduling
Proceedings of the conference on Applications, technologies, architectures, and protocols for computer communication
On achievable service differentiation with token bucket marking for TCP
Proceedings of the 2000 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
JoBS: Joint Buffer Management and Scheduling for Differentiated Services
IWQoS '01 Proceedings of the 9th International Workshop on Quality of Service
Characterization and performance evaluation for proportional delay differentiated services
ICNP '00 Proceedings of the 2000 International Conference on Network Protocols
Dynamic Class Selection: From Relative Differentiation to Absolute QoS
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RSVP and integrated services in the Internet: a tutorial
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A case for relative differentiated services and the proportional differentiation model
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End-to-end throughput and delay assurances in multihop wireless hotspots
Proceedings of the 1st ACM international workshop on Wireless mobile applications and services on WLAN hotspots
Node delay assignment strategies to support end-to-end delay requirements in heterogeneous networks
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Robust Processing Rate Allocation for Proportional Slowdown Differentiation on Internet Servers
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Implementation and performance measurements of a delay-bounded HPD algorithm in an ALTQ-based router
CoNEXT '05 Proceedings of the 2005 ACM conference on Emerging network experiment and technology
From relative to observable proportional differentiation in OBS networks
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On the rate constraint of transmitting multiple priority classes with QoS
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A robust packet scheduling algorithm for proportional delay differentiation services
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Consistent proportional delay differentiation: A fuzzy control approach
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Proceedings of the 6th International Conference on Queueing Theory and Network Applications
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A rule-based approach for consistent proportional delay differentiation (extended abstract)
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The proportional differentiation model provides the network operator with the 'tuning knobs' for adjusting the per-hop quality-of-service (QoS) ratios between classes, independent of the class loads. This paper applies the proportional model in the differentiation of queueing delays, and investigates appropriate packet scheduling mechanisms. Starting from the proportional delay differentiation (PDD) model, we derive the average queueing delay in each class, show the dynamics of the class delays under the PDD constraints, and state the conditions in which the PDD model is feasible. The feasibility model of the model can be determined from the average delays that result with the strict priorities scheduler. We then focus on scheduling mechanisms that can implement the PDD model, when it is feasible to do so. The proportional average delay (PAD) scheduler meets the PDD constraints, when they are feasible, but it exhibits a pathological behavior in short timescales. The waiting time priority (WTP) scheduler, on the other hand, approximates the PDD model closely, even in the short timescales of a few packet departures, but only in heavy load conditions. PAD and WTP serve as motivation for the third scheduler, called hybrid proportional delay (HPD). HPD approximates the PDD model closely, when the model is feasible, independent of the class load distribution. Also, HPD provides predictable delay differentiation even in short timescales.