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Maritime governance stakes are important in West Africa, if only due to the dominant role of fisheries, which coastal populations mainly depend on. In this context, with reference to the fishery sector mostly studied in two countries (Guinea and Mauritania), this paper aims to identify and synthesize the challenges to be met towards developing the governance of marine spaces. To this end, the analysis...
IEEE 802.11e (EDCA) standard is concerned to support QoS in wireless ad-hoc networks. However, EDCA cannot control traffic when there is a congestion to guarantee QoS required by real-time and multimedia applications. Therefore, the ill-behaved sources consume the most of bandwidth allowed. That leads to some of source nodes (i.e. out-ranged nodes) suffer from the lack of bandwidth and unfairness...
This study aims to develop and optimize the quality of service (QoS) with fairness in multi-hop wireless adhoc networks. IEEE802.11e (EDCA) standard is concerned to support QoS in wireless adhoc networks. Thereby, EDCA differentiates and classifies the packets in access categories depending on their priorities. However, it cannot guarantee strict QoS required by real-time and multimedia services without...
This study aims to develop and optimize the Quality of Service (QoS) with fairness in wireless ad hoc networks. We will discuss the conception and the mechanisms that are specified by IEEE802.11e (EDCA) standard which is concerned to QoS in wireless adhoc networks. IEEE802.11e (EDCA) enhances the original standard by enhancing the distributed coordination function (DCF). DCF consists in deferring...
This paper is a consequence of further works which deal with the linear character of weighted T-systems in dioids like (max ,+) or (min ,+). Our objective is to propose an algebraic point of vue this kind of Petri nets. The deterministic property permits to propose a mathematical abstraction of the Petri net behavior and the possibility to evaluate some properties on the system of equations. And the...
This paper deals with the possibility to study the behavior of a large class of Petri net: weighted T-systems (WTS). We recall recent results which propose to linearize WTS on a marked graph (MG), in order to obtain a model which can be analyzed using tropical algebra like (max, +) or (min, +). In the last part, we present a transformation to extend the previous results. The idea is to introduce synchronization...
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