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Delay aspects in Internet telephony

Publications associées (96)

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Delay Jitter Bounds and Packet Scale Rate Guarantee for Expedited Forwarding

Jean-Yves Le Boudec

We consider the definition of the Expedited Forwarding Per-Hop Behaviour (EF PHB) as given in RFC 2598, and its impact on worst case end-to-end delay jitter. On one hand, the definition in RFC 2598 can be used to predict extremely low end-to-end delay jitt ...

2001

ABE: providing a low-delay service within best effort

Jean-Yves Le Boudec, Patrick Thiran, Paul Hurley

Alternative best effort (ABE) is a novel service for IP networks, which relies on the idea of providing low delay at the expense of possibly less throughput. The objective is to retain the simplicity of the original Internet single-class best-effort servic ...

2001

Adaptive Delay aware error control for Internet Telephony

Jean-Yves Le Boudec, Catherine Boutremans

Forward Error Correction copes with packet losses, but at the expense of an increase of the end-to-end delay. By failing to take this into account, existing error control schemes for audio often lead to end-to-end delays larger than 150 ms, which has an im ...

2000

ABE: Providing a Low Delay Service Within Best-Effort

Jean-Yves Le Boudec, Patrick Thiran, Paul Hurley

We propose Alternative Best-Effort (ABE), a novel service for IP networks, which retains the simplicity of the original Internet single class, best effort service, while providing low delay to interactive, adaptive applications. With ABE, applications choo ...

2000

Realisation of an Adaptive Audio Tool

Catherine Boutremans, Arnaud Meylan

Real-time audio over the best effort Internet often suffers from packet loss. At this time, Forward Error Correction (FEC) seems to be an efficient way to attenuate the impact of loss. Nevertheless to ensure efficiency of FEC, the source rate must be conti ...

2000

Realisation of an Adaptive Audio Tool

Catherine Boutremans, Arnaud Meylan

Real-time audio over the best effort Internet often suffers from packet loss. So far, Forward Error Correction (FEC) seems to be an efficient way to attenuate the impact of loss. Nevertheless to ensure efficiency of FEC, the source rate must be continuousl ...

2000

Some properties of variable length packet shapers

Jean-Yves Le Boudec

The min-plus theory of greedy shapers has been developed after Cruz's results on the calculus of network delays. An example of greedy shaper is the buffered leaky bucket controller. The theory of greedy shapers establishes a number of properties; for examp ...

2000

Delay Jitter Bounds and Packet Scale Rate Guarantee for Expedited Forwarding

Jean-Yves Le Boudec

2000

High-bandwidth internet video telephony

Martin Vetterli

We consider the problem of full-duplex video transmission over the Internet, under real-time delay constraints. In this work we present the design of a complete communications system, whose salient features are: (a) a soft real-time transport protocol, who ...

2000

Global fairness of additive-increase and multiplicative-decrease with heterogeneous round-trip times

Jean-Yves Le Boudec, Milan Vojnovic, Catherine Boutremans

Consider a network with an arbitrary topology and arbitrary communication delays, in which congestion control is based on additive--increase and multiplicative--decrease. We show that the source rates tend to be distributed in order to maximize an objectiv ...

2000