Mohamed Escheikh

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Providing optimal resource utilization while minimizing costs involved for wireless networks remains a challenging issue. Particularly mobile ad hoc environments subject to multi-path fading and characterized by a dynamic topology need better resource management mechanisms. The focus of this paper is the performance evaluation of IEEE 802.11e MAC layer(More)
This article investigates mobility load balancing (MLB) algorithm implementation through network simulator (ns-3) in long term evolution (LTE) systems employing orthogonal frequency division multiple access (OFDMA) for downlink (DL) data transmission. MLB is introduced by the third generation partnership project (3GPP) as a key target of LTE self-organizing(More)
In this paper, we deal with the formal verification of an encryption scheme for Wireless Sensor Networks (WSNs). Especially, we present our first results on building a framework dedicated to modelling and verification of WSNs aspects. To achieve our goal, we propose to specify WSNs models written in Petri nets using Promela constructs in order to verify(More)
Integration of efficient scheduling policies in radio resource management (RRM) strategies is nowadays, of a paramount importance for the success deployment of wireless Long Term Evolution (LTE) systems. This is particularly effective for downlink where data rates are important and where scheduling decision should enable to allocate, in each Transmission(More)
We propose in this paper a workload-aware perform ability analysis of elastic server virtualized systems (SVS) based on non-Markovian SRN modeling approach. This analysis investigates correlations between several modules involving workload-aware power management (PM) mechanism, virtual machine (VM) and VM monitor (VMM) subject to aging, failure and(More)
Analytical resolution of complex queuing systems remains nowadays an open and challenging issue and may be extensively used in modeling and representing dynamic behavior of sophisticated systems. This is particularly the case of M/G/c/c+ r queue where exact analytical solution is difficult to reach. In this paper, we propose a new approximate analytical(More)
Although enhanced distributed coordination function EDCF mechanism brings service differentiation between different access categories, Quality of service is not guaranteed for delay sensitive applications such as voice unless further open parameters of the amendment may be supported in the implementation phase. Among these parameters we focus in this paper(More)