IP Networks Quality of Service: Overview and Open Issues

Mechanisms to provide Quality of Service (QoS) into Internet have a collection of aspects to consider improving network performance. However, this work focuses only on four of these aspects, as follows: Traffic Models, Queue scheduling, Congestion control and QoS routing. Considering any of the three above mentioned approaches, it is necessary the use of traffic models which capture the real network traffic behavior. This paper introduces some QoS concepts, as well as open-issues in the mentioned areas.

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