Adaptive Weighted Lottery Earliest Deadline First Scheduler (AWLEDF) with Feedback Control-congestion Mechanism

Author: Ma'en Saleh

Abstract:
Different network technologies were developed to provide guaranteed quality of service (QoS) requirements for different classes of data flows that passing through a network. Accordingly, a variety of scheduling algorithms were proposed. In this research, we propose an efficient scheduling algorithm (AWLEDF) that integrates a multi-layer scheduler with a network congestion control methodology to be installed on the edge router of a packet switched network. The Multi-layer scheduler combines the earliest-deadline-first (EDF) and the lottery schedulers to provide guaranteed QoS for three classes of data flows: video, audio, and best effort (text) traffics, while the congestion control methodology implements a feedback mechanism that monitors the buffer resources at the edge router. Compared to FCFS, EDF, and Lottery-FCFS schedulers, AWLEDF shows high efficiency in providing QoS requirements in terms of miss-rate and average packet delay, while protecting the network from being congested efficiently through measuring the buffer utilization at the edge router.

Keywords:
Scheduling, Control-Congestion, NPMs, QoS, Lottery.


Volume 18, Issue 2, February 2014, pp. 845-850                    Download PDF



References:


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