Priority Queueing Applied to Expedited Forwarding: A Measurement-Based Analysis

Authors:
Tiziana Ferrari;Giovanni Pau;Carla Raffaelli
Affiliations:
-;-;-
Venue:
QofIS '00 Proceedings of the First COST 263 International Workshop on Quality of Future Internet Services
Year:
2000

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Abstract

The priority queueing mechanism is analysed to verify its effectiveness when applied for the support of Expedited Forwarding-based services in the Differentiated Services environment. An experimental measurement-based methodology is adopted to outline its properties and end-to-end performance when supported in real transmission devices. A test layout has been set up over a metropolitan area for the estimation of one-way delay and instantaneous packet delay variation. The effect of relevant factors like the buffering architecture, the background traffic packet size distribution and the EF traffic profile are considered. In particular, the complementary one-way delay probability function is computed for a given packet size distribution and the Aggregation Degree parameter is defined to quantify the effect of traffic aggregation on end-to-end QoS.