Overload Based Explicit Rate Switch Schemes with MCR Guarantees

TL;DR

This paper introduces four overload-based explicit rate switch schemes with MCR guarantees that adaptively control feedback rates to optimize link utilization and maintain steady-state delay, tested through extensive simulations.

Contribution

It proposes novel overload-based ABR switch algorithms that incorporate overload factors and dynamic queue control to ensure MCR guarantees and efficient link usage.

Findings

Algorithms effectively manage link and source bottlenecks

Achieve constant queuing delay at steady state

Outperform existing schemes in simulations

Abstract

An explicit rate switch scheme monitors the load at each link and gives feedback to the sources. We define the overload factor as the ratio of the input rate to the available capacity. In this paper, we present four overload based ABR switch schemes which provide MCR guarantees. The switch schemes proposed use the overload factor and other quantities to calculate feedback rates. A dynamic queue control mechanism is used to achieve efficient usage of the link, control queues and, achieve constant queuing delay at steady state. The proposed algorithms are studied and compared using several configurations. The configurations were chosen to test the performance of the algorithms in presence of link bottlenecks, source bottlenecks and transient sources. A comparison of the proposed algorithms based on the simulation results is presented.