Academic & Scientific Articles
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Item A critical review of quality of service models in mobile ad hoc networks(Inderscience Enterprises Ltd, 2019) Bouchama, Nadir; Aïssani, Djamil; Djellab, Natalia; Nouali-Taboudjemat, NadiaQuality of service (QoS) provisioning in mobile ad hoc networks (MANETs) consists of providing a complex functionality in a harsh environment where resources are scarce. Thus, it is very challenging to build an efficient solution to address this issue. The proposed solutions in the literature are broadly classified into four categories, namely: QoS routing protocols, QoS signalling, QoS-aware MAC protocols and QoS models, which are the main concern of our study. The contribution of this paper is threefold: Firstly, we propose a set of guidelines to deal with the challenges facing QoS models design in ad hoc networks. Secondly, we propose a new taxonomy for QoS models in ad hoc networks. Finally, we provide an in-depth survey and discussion of the most relevant proposed frameworks.Item QoS aware Multiple Spanning Tree Mechanism in Multi-Radio multi-channel WMN(CERIST, 2009) Aoufi, souhila; Tandjaoui, DjamelA single-channel wireless mesh backbone may suffer from capacity limitations since all the wireless routers share the same channel. A multi-channel broadband wireless mesh backbone may have different capacity. This paper addresses the problem of channel assignment (CA) with differentiated services (DiffServ) to support the quality-of-service (QoS) in the wireless mesh backbone. We propose a novel, simple and yet highly effective enhancement to the Spanning Tree protocol of ‘hyacinth’ to achieve high degree of QoS by keeping in perspective the different characteristics of the various traffic types in the Diffserv framework. We discuss the problems of CA and present in detail our proposed extension to overcome them