André Girard

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Cahiers du GERAD

27 results — page 1 of 2

In this paper, we propose a fast algorithm to compute a bound for the problem of optimizing the power of a number of users sharing a set of wireless chan...

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There has been a lot of interest recently on the energy efficiency and environmental impact of wireless networks. Given that the base stations are the netw...

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Network characterization and modelling is an important issue to understand and monitor IP network performance, in particular for real-time multimedia appli...

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In this paper we investigate the options of a network operator faced with the requirement of reducing its carbon footprint, expressed in terms of a global en...

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We investigate the optimal power allocation in an OFDM-SDMA system when some users have minimum requirements for their downlink transmission rate. We first ...

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Jitter buffering is a key component in multimedia and real-time services. A jitter buffer is used at the receiver side to control packet rate and to compensa...

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The packet delay variation, commonly called delay jitter, is an important quality of service parameter in IP networks especially for real-time applications. ...

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We consider multi-antenna base stations using orthogonal frequency-division multiple access and space division multiple access techniques to serve single-a...

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Current network planning and design methods use the average delay, packet loss and throughput as metrics to optimize the network cost and performance. New...

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The topic of this paper is the evaluation of QoS parameters in live Pre-Wimax environments. The main contribution is the validation of an analytical delay-ji...

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Traditionally, IP Network planning and design is mostly based on average delay or loss constraints which can often be easily calculated. Jitter, on the othe...

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The convergence of different classes of traffic with different priorities over the wire- less network has become a reality. To insure that the users of key ...

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In this paper, we study the problem of determining the capacity requirements for applications that require QoS guarantees. We consider three kinds of source ...

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As ISP’s and Telco’s converge towards all-IP network infrastructures, the problem of QoS becomes more acute. To address it, operators are deploying differen...

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In this article we extend previous work showing that DiffServ can provide some QoS guarantees to both real-time and non real-time traffic in the event of th...

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The increase of bandwidth demand for new Internet applications suggests mapping directly IP over the WDM layer. Since reliability is such a critical issue i...

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This paper presents a new heuristic to solve efficiently the problem of dimension- ing large-size hybrid optoelectronic networks with grooming. It is modele...

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We consider the design of a hybrid opto-electronic network with grooming. We propose a model in which we take into account the fact that grooming traffic req...

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In this paper, we present an optimization model based on cost minimization for traffic engineering of multirate and ATM networks with switched virtual circ...

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This paper solves the problem of designing an access tree network for which the users are connected to the switches through SONET channels on fiber optics l...

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