Kawther Hassine

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BACKGROUND Because of the immunity depression, patients with chronic renal failure undergoing haemodialysis are at increased risk for developing infections, Mycobacterium tuberculosis (MTb) in particular. OBJECTIVE To evaluate, in a prospective longitudinal study over 36 months period, the frequency of Tb among these patients and underline the diagnostic(More)
In this paper, we propose a new scheme for aggregating access points backhaul bandwidth resources in wireless local area networks. We consider a setting with several access points, some with excess backhaul capacity, and others in shortage of it, and propose a symmetric approach wherein the distribution of resources is managed between providing and(More)
In this paper, we propose a new approach for dynamic frame aggregation at Medium Access Control layer (MAC) in wireless local area network. We considered an IEEE 802.11n infrastructure mode network, and a VoIP communications' context. Among diverse suggested schemes of frame aggregation, we opted for the MAC Protocol Data Unit (MPDU) to be the basic unit(More)
The increasing use of wireless technology has led to the growth of LTE-Advanced networks. Accordingly, the handover procedure becomes more delicate especially over high mobility speed, and for real time services. In this paper, we consider a highway handover scenario, wherein, a congested target node, in terms of resource blocks (RB), leads to a packet loss(More)
Wireless communications markets present rapidly changing technology, evolving customer demands, and the emergence of new products and services. Within spectral limitations, wireless standards end up competing for optimal network performance and better client satisfaction, especially for residential scenarios and hotspots. In actual wireless networks, the(More)
We conduct in this work a comparative study between a greedy versus limited proposals for resource aggregation in the backhaul of wireless local area networks. We consider a setting with several access points, some with excess backhaul capacity (providers), and others in shortage of it (beneficiaries) and investigate two approaches for the distribution of(More)
This paper proposes a frame aggregation scheme for VoIP traffic over wireless local area network. In this context, we studied main attributes of VoIP in wireless systems, and recalled its basic requirements when it comes to quality of service. We proved that voice streams particularity in terms of bandwidth, pattern and packet format has its own fallouts on(More)
Given the rapid expansion of Long Term Evolution (LTE) systems, Quality of Service (QoS) have got to be a key factor when it comes to users' Quality of Experience (QoE). Operators and service providers are, more than ever, focused to provide high data rate and high reliable services especially under high mobility circumstances. However, in high speed case,(More)
During the handover, quality of service (QoS) in LTEA systems poses quite a challenge especially for real-time services. In high speed mobility, the handover procedure becomes more delicate as it occurs more frequently in a time basis scale. In fact, a currently used resource in a “source node” could be not available in the “target(More)