Rana Khanafer

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This paper presents an automated diagnosis in troubleshooting (TS) for Universal Mobile Telecommunications System (UMTS) networks using a Bayesian network (BN) approach. An automated diagnosis model is first described using the Naive Bayesian Classifier. To increase the performance of the diagnosis model, the entropy minimization discretization (EMD) method(More)
Third generation mobile systems are driving a multi-system network landscape. Network management is crucial to guarantee optimum cooperation between network sub-systems. The aim of the Gandalf project is to use large scale network monitoring, advanced radio resource management rules and appropriate quality of service evaluation in order to achieve(More)
The use of fresh aqueous garlic extract is known to be effective in reducing thromboxane formation by platelets in both in vivo and in vitro animal models of thrombosis. In the present study, we studied the effect of Lichtwer garlic powder (containing 1.3% alliin equivalent to 0.6% allicin) on the serum cholesterol, triglyceride, glucose, protein, and(More)
Troubleshooting (TS) in UMTS networks are basic management tasks required to guarantee efficient usage of the network infrastructure. This paper presents a methodology for automating TS tasks based on Bayesian networks (BN). In a first learning phase, data relating symptoms and alarms to faults in the network is extracted and used to create the TS model. In(More)
  • Rana Khanafer
  • 2006 2nd International Conference on Information…
  • 2006
With the fast evolution of IP networks, new approaches have been proposed to maintain the quality of service (QoS) of existing and new applications. Recent papers have shown the interest of introducing flow level admission control mechanisms. The key idea is to guarantee for each accepted flow a minimum of resources by limiting the number of flows accepted(More)
  • Rana Khanafer
  • 2006 2nd International Conference on Information…
  • 2006
A careful study of the TCP (transmission control protocol) protocol shows that the congestion control mechanism is unfair in an environment where flows with different sizes compete for scarce resources. Short connections tend to lose to long connections in their competition for bandwidth. This is because short connections do not gain detailed knowledge of(More)
The users' interest in mobile multimedia contents is on the rise. This tendency is driven by the high availability of contents and the increase of multimedia capabilities of mobile end-devices. However, in many countries, providing contents to rural areas remains a challenge due to the lack of coverage of mobile data networks and to the long data(More)
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