A comparison of queue management algorithms for intra-flow loss control

Two novel queue management algorithms which improve the intra-flow quality of service (QoS) without higher-layer filtering are discussed. The first algorithm is called differential random early detection (DiffRED). It differentiates between packets marked by the sender as either more or less eligible to be dropped in comparison to unmarked packets without keeping any per-flow state. On the contrary, the other algorithm called predictive loss pattern (PLoP) operates without per-packet marking, yet with keeping partial per-flow state. A simple metrics to describe the loss process of individual flows and present simulations results with voice as foreground traffic using the proposed methods in a multi-hop topology.