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

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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
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

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