VALOIS , Fabrice

Ad hoc networking specific challenges foster a strong research effort on efficient protocols design. Routing protocols based on a self-organized structure have been studied principally for the robustness and the scalability they provide. On the other hand, self-organization schemes may decrease the network capacity since they concentrate the...

Ad hoc networking specific challenges foster a strong research effort on efficient protocols design. Routing protocols based on a self-organized structure have been studied principally for the robustness and the scalability they provide. On the other hand, self-organization schemes may decrease the network capacity since they concentrate the...

Les réseaux ad hoc tirent parti de la collaboration des noeuds pour acheminer des informations. Si de nombreuses approches ont vu le jour, la problématique du routage demeure un point crucial. Deux approches se détachent : une première résidant dans une visionà plat du réseau et une seconde, plus récente, où le routage repose sur une...

Assuming a given network topology and a routing protocol, this work is focused on the capacity evaluation of routing protocols based on either a self-organization scheme or a flat approach. To reach this goal, we propose to use linear-programming formulation to model radio resource sharing as linear constraints. Four models are detailed to...

The specific challenges of multihop wireles networks lead to a strong research effort on efficient protocols design where the offered capacity is a key objective. More specifically, routing strategy largely impacts the network capacity, i.e. the throughput offered to each flow. In this work, we propose a complete framework to compute the upper...

Dans un réseau radio maillé multi-saut où tous les routeurs émettent une quantité de trafic vers la passerelle, le goulot d'étranglement autour de cette passerelle représente la majeure contrainte. Ceci limite les performances du réseau, particulièrement la capacité du réseau. Dans ce travail, nous étudions l'ordonnancement autour de la...

The capacity of a multi-hop wireless network is the traffic payload that it can transport. This is a prominent quality of service issue, particularly in the highly constrained settings of 802.11 wireless mesh network. In this paper, we consider two complementary definitions of the capacity. A network-wise capacity is defined as the sum of the...

LoRaWAN is a widely used wireless communication standard for the Internet of Things that enables the collection of measurement data from numerous monitoring applications (such as smart metering, pollution, and asset tracking). Most research work has been focused on the performance of LoRaWAN as a function of the uplink traffic, as this is the...