Title :
A new scheduling mechanism to provide relative differentiation for real-time IP traffic
Author_Institution :
Inst. of Commun. Networks & Comput. Eng., Stuttgart Univ., Germany
Abstract :
Design alternatives for supporting real-time traffic in a differentiated services IP network node are studied. A scheduling algorithm called weighted earliest due date (WEDD) is proposed that provides tunable delay differentiation for applications like video or voice over IP. WEDD enhances the earliest due date (EDD) scheduling mechanism in such a way that not only different delay bounds but also different deadline violation probabilities are provided. The ratios of violation probabilities in different classes are easily specified by a set of parameters. Simulation studies are performed to show that the scheduler is able to maintain the specified ratios under various traffic conditions in short as well as in long time scales
Keywords :
Internet telephony; delays; probability; quality of service; queueing theory; telecommunication traffic; transport protocols; QoS; deadline violation probabilities; delay bounds; differentiated services IP network node; earliest due date scheduling; fair queueing; real-time IP traffic; relative differentiation; scheduling algorithm; scheduling mechanism; simulation; tunable delay differentiation; video; violation probability ratio; voice over IP; weighted earliest due date; Communication system traffic control; Delay; Diffserv networks; Harmonic analysis; Internet telephony; Quality of service; Scheduling algorithm; Telecommunication traffic; Traffic control; Web and internet services;
Conference_Titel :
Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-6451-1
DOI :
10.1109/GLOCOM.2000.892096
