engleski

Analysis of Transient Behaviour of the Distributed Explicit-Rate ABR Traffic Flow Control

An analytical formulation of the transient behavior of the Available Bit Rate (ABR) explicit-rate traffice flow control for the single-node case is presented. Precisely, the transient effects due to available capacity increasing (a ramp-up) of the recently proposed Distributed Explicit-Rate Allocation (DERA) scheme, and generally valid available capacity decreasing (a ramp-down)transient case are analyticaly formulated, using a fluid-flow traffic approximation. An analytical formulation of the queue build-up, and characteristic time instants provides insight of the cause and effect relationships, and can be used for buffer dimensioning. In addition, quantification of the queue build-up and the dependence on other system parameters may prove useful in evaluating other alghorithms and designing those that avoid it. the obtained analytical results are verified through discrete-event simulation.

available bit rate; flow control; fluid-flow traffic approximation

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