Concept

Qualité de service

Publications associées (337)

A Search Engine for QoS-enabled Discovery of Semantic Web Services

Directory services are a genuine constituent of any distributed architecture which facilitate binding attributes to names and then querying this information, i.e., announcing and discovering resources. In the web services domain this functionality is provi ...

2006

Media Streaming with Conservative Delay on Variable Rate Channels

Pascal Frossard, Dan Jurca

We address the problem of delay-constrained streaming of multimedia packets over dynamic bandwidth channels. Efficient streaming solutions generally rely on the knowledge of the channel bandwidth, in order to select the media packets to be transmitted, acc ...

2006

Modeling and Characterization of Three Kinds of MEMS Resonators Fabricated with a Thick Polysilicon Technology

Massimo Mastrangeli

Three different kinds of two-port flexural resonators, with both clamped and free ends, and with nominal resonance frequencies between 5 MHz and 50 MHz, were designed and fabricated. Among them, a novel free-free third-mode resonator, as well as a tunable ...

2006

Probabilistic Estimation of Peers’ Quality and Behaviors for Subjective Trust Evaluation

Karl Aberer

The management of trust and quality in decentralized systems has been recognized as a key research area over recent years. In this paper, we propose a probabilistic computational approach to enable a peer in the system to model and estimate the quality and ...

2006

Rate-Distortion Optimized Distributed Packet Scheduling of Multiple Video Streams over Shared Communication Resources

Pascal Frossard

We consider the problem of distributed packet selection and scheduling for multiple video streams sharing a communication channel. An optimization framework is proposed, that enables the multiple senders to coordinate their packet transmission schedules, s ...

2006

Impact of disorder on high quality factor III-V nitride microcavities

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Eric Feltin, Gabriel Christmann, Dobri Simeonov

The authors report on the micron scale characterization of a monolithic GaN microcavity (MC) with lattice matched AlInN/GaN distributed Bragg reflectors by means of a microtransmission setup. This technique allows extracting very high quality factors (Q up ...

2006

Quality of Service Provided by Deficit Round Robin Algorithm

Nevena Vratonjic, Nevena Krsmanovic

In this paper we examine performance of the switches with output buffers for traffic with reservations and best-effort traffic. Packets are scheduled according to the Deficit Round Robin (DRR) algorithm. The DRR has been modeled, and quality of service in ...

2006

Cost-Aware Processing of Similarity Queries in Structured Overlays

Manfred Hauswirth, Roman Schmidt

Large-scale distributed data management with P2P systems requires the existence of similarity operators for queries as we cannot assume that all users will agree on exactly the same schema and value representations and data quality problems due to spelling ...

2006

"Pay bursts only once" does not hold for non-FIFO Guaranteed Rate nodes

Jean-Yves Le Boudec, Gianluca Rizzo

We demonstrate that, contrary to what is generally believed, the existing end-to-end delay bounds apply only to GR nodes that are FIFO per flow. We show this by exhibiting a counter-example. Then we show that the proof of the existing bounds has a subtle, ...

2005

Towards P2P-based Semantic Web Service Discovery with QoS Support

Karl Aberer, Manfred Hauswirth

The growing number of web services advocates distributed discovery infrastructures which are semantics-enabled and support quality of service (QoS). In this paper, we introduce a novel approach for semantic discovery of web services in P2P-based registries ...

2005

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