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Modélisation et simulation des réseaux sans fil hétérogènes et non-stationnaires. Application aux topologies de petites cellules

Laurent Maviel 1
1 SOCRATE - Software and Cognitive radio for telecommunications
Inria Grenoble - Rhône-Alpes, CITI - CITI Centre of Innovation in Telecommunications and Integration of services
Abstract : New services available with modern mobile telecommunication networks lead to a growing demand for better bit rates up to reach the capacity limits of current networks. To face this demand, cellular network operators deploy new technologies and densify their radio access by adding small cells, where the distance between the mobile users and the base stations is decreased. Given the Line of Sight conditions and the low height of base station antennas, the small-cell propagation channel is different from the classical macro-cellular channel and existing stochastic channel models are not suited anymore. In this context, this Ph.D. work proposes to explore challenges on the dynamics of the channel and of radio resource usage. In a first part, we propose to characterize the dynamics of the propagation channel in smallcell outdoor environments. This characterization is based on deterministic predictions, where part of the environment is randomly generated in order to proceed to statistical analysis. We describe a simulation framework able to generate static objects, to move them and to take them into account in propagation prediction tools targeted for small-cell environments. Measurements of the impact of vehicular traffic on received power enable the validation of propagation tools developed in the framework. In the second part of this work, we propose to evaluate the impact of those new topologies on the performance of heterogeneous networks. We present a hybrid propagation model taking into account signal variations due to vehicular traffic by combining deterministic and statistic approaches in order to benefit from both advantages: accurate results and quick simulations. This hybrid model is finally used in a cellular 3G LTE network simulation process where we evaluate the impact of vehicular traffic on maximal throughputs, energy consumption and quality of service.
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  • HAL Id : tel-00942972, version 1

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Laurent Maviel. Modélisation et simulation des réseaux sans fil hétérogènes et non-stationnaires. Application aux topologies de petites cellules. Réseaux et télécommunications [cs.NI]. INSA de Lyon, 2013. Français. ⟨tel-00942972⟩

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