Dynamic Configuration of Multimedia Applications

Atallah, Slim Ben; Layaida, Oussama; Palma, Noël De; Hagimont, Daniel

doi:10.1007/978-3-540-39404-4_4

Cited by 11 publications

(1 citation statement)

References 19 publications

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“…For Videoconference traffic we use an H.263 coded trace from [49] with average rate 64kbps and peak rate 332.8kbps. The H.263 format has been widely employed to model Videoconference traffic, e.g., see [50,51]. The active time of both VoIP and Videoconference sources is exponentially distributed with an average of 300sec.…”

Section: Fig 10 Simulation Topologymentioning

confidence: 99%

An integrated bandwidth allocation and admission control framework for the support of heterogeneous real-time traffic in class-based IP networks

Georgoulas¹,

Trimintzios²,

Pavlou³

et al. 2008

Computer Communications

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The support of real-time traffic in class-based IP networks requires the reservation of resources in all the links along the end-to-end paths through appropriate queuing and forwarding mechanisms. This resource allocation should be accompanied by appropriate admission control procedures in order to guarantee that newly admitted real-time traffic flows do not cause any violation to the Quality of Service (QoS) experienced by the already established real-time traffic flows. In this paper we initially aim to highlight certain issues with respect to the areas of bandwidth allocation and admission control for the support of real-time traffic in class-based IP networks. We investigate the implications of topological placement of both the bandwidth allocation and admission control schemes. We show that the performance of bandwidth allocation and admission control schemes depends highly on the location of the employed procedures with respect to the end-users requesting the services and the various network boundaries (access, metro, core, etc.). Based on our results we conclude that the strategies for applying these schemes should be location-aware, because the performance of bandwidth allocation and admission control at different points in a class-based IP network, and for the same traffic load, can be quite different and can deviate greatly from the expected performance. Through simulations we also try to provide a quantitative view of the aforementioned deviations. Taking the implications of this "location-awareness" into account, we subsequently present a new Measurement-based Admission Control (MBAC) scheme for real-time traffic that uses measurements of aggregate bandwidth only, without keeping the state of any per-flow information. In this scheme there is no assumption made on the nature of the traffic characteristics of the real-time traffic flows, which can be of heterogeneous nature. Through simulations we show that the admission control scheme is robust with respect to traffic heterogeneity and measurement errors. We also show that our scheme compares favorably against other admission control schemes in the literature. IntroductionCurrent IP networks provide only one simple service; that is the best-effort service. Such a simple service model allows routers to be stateless and has allowed the Internet to scale well in both the size of the network and the nature of the applications. However, as the Internet evolves into a global communication infrastructure, there is a need to provide more sophisticated service models in order to support emerging services, such as Voice over IP (VoIP), Videoconference, and real-time traffic in general. Real-time traffic has QoS requirements that the current best-effort Internet cannot provide in a resource and, consequently, cost-effective manner, e.g. without massive overprovisioning.Integrated services (Intserv) was the first attempt towards supporting QoS in the Internet, but the per-flow state information that was required in all routers, both edge and core, resulted in majo...

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Section: Fig 10 Simulation Topologymentioning

confidence: 99%

An integrated bandwidth allocation and admission control framework for the support of heterogeneous real-time traffic in class-based IP networks

Georgoulas¹,

Trimintzios²,

Pavlou³

et al. 2008

Computer Communications

View full text Add to dashboard Cite

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Towards Tailormade eLearning Streaming Services: A Framework for Specification, Implementation and Management

Zimmermann

2006

Advanced Int'l Conference on Telecommunications and Int'l Conference on Internet and Web Applications and Services (AICT-ICIW'0

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We propose a new streaming media service development environment comprising of a streaming media service model, a XML based service specification language and several implementation and configuration management tools. In our project, the described approach is used for integration of streaming based eLearning services in manufacturing processes of a subcontractor to the automotive industry. The key components of our approach are 1) an xml based streaming service specification language, 2) a set of web services for searching, registration, and creation of streaming services, 3) caching and replication policies based on timing information derived from the service specifications.

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eLearning in manufacturing processes: implementation by integrated Web services and streaming services

Zimmermann

2005

Advanced Industrial Conference on Telecommunications/Service Assurance With Partial and Intermittent Resources Conference/E-Lea

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Dynamic Configuration of Multimedia Applications

Cited by 11 publications

References 19 publications

An integrated bandwidth allocation and admission control framework for the support of heterogeneous real-time traffic in class-based IP networks

An integrated bandwidth allocation and admission control framework for the support of heterogeneous real-time traffic in class-based IP networks

Towards Tailormade eLearning Streaming Services: A Framework for Specification, Implementation and Management

eLearning in manufacturing processes: implementation by integrated Web services and streaming services

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