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AuthorSaleh, Moutaz
AuthorOthman, Z.A.
AuthorSaleh, Mohammed
Available date2009-12-23T14:01:35Z
Publication Date2009-02
Publication NameEuropean Journal of Scientific Research
CitationSaleh, Moutaz; Othman, Zulaiha Ali; Saleh, Mohammed, "Characteristics of Agent-Based Hierarchical Diff-EDF Schedulability Over Heterogeneous Real-Time Packet Networks", European Journal of Scientific Research; Feb 2009, Vol. 27 Issue 3, p431-453
ISSN1450-216X
URIhttp://hdl.handle.net/10576/10427
AbstractPacket networks are currently enabling the integration of heterogeneous traffic with a wide range of characteristics that extend from video traffic with stringent QoS requirements to best-effort traffic requiring no guarantees. QoS guarantees can be provided in packet networks by the use of proper packet scheduling algorithms. In this paper, we propose a new priority assignment scheduling algorithm, Hierarchical Diff-EDF, which can meet the real-time needs while continuing to provide best effort service over heterogeneous network traffic environment. The Hierarchical Diff-EDF service meets the flow miss rate requirements through the combination of single step hierarchal scheduling for the different network flows and the admission control mechanism that detects the overload conditions to adjust packets' priorities. To examine the proposed scheduler, we introduced an attempt to provide an exact analytical solution. The attempt showed that the solution was apparently very complicated due to the high interdependences between the system queues' service. Hence, the use of simulation seems inevitable. A multi-agent simulation that takes the inspiration from object-oriented programming is adopted. The simulation itself is aimed to the construction of a set of elements which, when fully elaborated, define an agent system specification. When evaluating our proposed scheduler, it was extremely obvious that the Hierarchical Diff-EDF scheduler performs over both of the EDF and Diff-EDF schedulers.
Languageen
PublisherEuroJournals Publishing, Inc.
SubjectAgent-based simulation
Analytical model
EDF
Hierarchical
Packet networks
QoS
Real time
Schedulability
TitleCharacteristics of agent-based hierarchical diff-EDF schedulability over heterogeneous real-time Packet networks
TypeArticle
dc.accessType Open Access


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