CAC and traffic shaping for performance control in ATM: the two-class paradigm

Soldatos, J; Vayias, E; Mitrou, N

dc.contributor.author	Soldatos, J	en
dc.contributor.author	Vayias, E	en
dc.contributor.author	Mitrou, N	en
dc.date.accessioned	2014-03-01T01:15:29Z
dc.date.available	2014-03-01T01:15:29Z
dc.date.issued	2000	en
dc.identifier.issn	1389-1286	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13543
dc.subject	ATM	en
dc.subject	QoS	en
dc.subject	shaping	en
dc.subject	CAC	en
dc.subject	burst-level traffic control	en
dc.subject.classification	Computer Science, Hardware & Architecture	en
dc.subject.classification	Computer Science, Information Systems	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Telecommunications	en
dc.subject.other	MODELS	en
dc.title	CAC and traffic shaping for performance control in ATM: the two-class paradigm	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1389-1286(00)00097-9	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1389-1286(00)00097-9	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Retaining only a few service classes in the ATM layer of broadband networks has the distinct advantage of simplifying the traffic control functions, which seems to be a key prerequisite for the successful introduction of ATM. In the paradigm under consideration, only two service classes are assumed, which share the storage and bandwidth resources at the network nodes according to an absolute-time-priority scheme, being able to support two general types of applications: real-time and non-real-time ones. The low-priority class is thus of the available-bit-rate (ABR) type, with some service quality guarantee obtained through allocating a minimum amount of bandwidth to it. Proper connection admission control (CAC) for both classes and traffic shaping of the low-priority traffic are employed in order to maintain contracted quality-of-service levels for both classes. Peak rates for the real-time traffic and effective rates for the non-real-time one form the basis of the control functions. A burst-level traffic model based on the M/D/1 queue is proposed for sources without strict delay constraints and the derived effective rate is validated by simulation and results from experiments on an ATM testbed. Following these results, a coherent CAC and traffic shaping scheme is presented. This scheme makes use of the proposed burst-level model to achieve an adaptive shaping of the non-real-time sources. For all links intended to support both classes, real-time sources are allocated, their demanded peak rate and the bandwidth left available by these sources is exploited by the ABR type sources (non-real-time), through adapting the parameters of the shaper. Simulation results validate the concept of this novel APR-like service. The set of simulation and experimental results contained in the paper constitute the heart of its contribution. (C) 2000 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	COMPUTER NETWORKS-THE INTERNATIONAL JOURNAL OF COMPUTER AND TELECOMMUNICATIONS NETWORKING	en
dc.identifier.doi	10.1016/S1389-1286(00)00097-9	en
dc.identifier.isi	ISI:000088032600006	en
dc.identifier.volume	34	en
dc.identifier.issue	1	en
dc.identifier.spage	65	en
dc.identifier.epage	83	en