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2001
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A Buffer-Management Scheme for Bandwidth and Delay Differentiation Using a Virtual Scheduler

10 years 5 months ago
A Buffer-Management Scheme for Bandwidth and Delay Differentiation Using a Virtual Scheduler
—This paper presents a new scalable buffer-management scheme for IP Differentiated Services. The scheme consists of a Differentiated Random Drop (DRD) algorithm using feedback from a virtual scheduler. DRD choses a queue to perform an early packet drop to avoid congestion according to a specific probability function. First it will be shown that DRD in conjunction with first-come firstserved scheduling is able to support relative service differentiation. The virtual scheduler is introduced to enable service differentiation in terms of bandwidth and delay at the same time. A virtual scheduler runs in parallel to the real scheduler and maintains virtual queue lengths that are being used by the congestion avoidance scheme as a feedback for packet drop decisions. Scheduling packets for transmission is performed by the real scheduler only. Keywords— Quality-of-Service, Differentiated Services, Relative Service Differentiation, Bandwidth and Delay Guarantees
Roman Pletka, Patrick Droz, Burkhard Stiller
Added 29 Jul 2010
Updated 29 Jul 2010
Type Conference
Year 2001
Where ICN
Authors Roman Pletka, Patrick Droz, Burkhard Stiller
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