Mohamed Aymen Chalouf

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Today, the number of elderly people and patients with reduced autonomy or with chronic diseases are steadily increasing. In addition, a stay in hospital or nursing home is very expensive. Thus, in recent years we have witnessed the development of projects to keep these people at home while providing them the needed care and assistance. The number of(More)
Today, the evolution of IP networks and the diversity of the data flowing through these networks require domain managers to ensure quality of service (QoS), security and mobility for various communications. Security and QoS can be negotiated between domain managers implied in a service offer. The SLNP (Service Level Negotiation Protocol) protocol allows the(More)
Based on the IP technology, the next generation networks (NGN) must overcome the main drawbacks of this technology consisting in the lack of quality of service (QoS), security and mobility management. To ensure a service offer in an NGN environment, a protocol for negotiating a service level can be used. However, most of the existing negotiation protocols(More)
The communication infrastructures and devices in hospitals are becoming increasingly wireless because of doctors and nurses are mobile in their work. On the other hand, the hospital patient's communications or their monitoring devices generate lot of electromagnetic waves. In this context, deployment of wireless networks should not only meet some(More)
Our society relies more and more on wireless communication technologies while most of the RF spectrum has already been allocated by the states. As a result, un-licensed bands are becoming crowded which makes it difficult to create a reliable network without using more spectrum than really necessary. Allowing radio nodes to seamlessly switch between(More)
The goal of the ubiquitous connectivity is to enable mobile users to be permanently and transparently connected to the Internet, with the desired quality of service. In such an environment, it becomes very difficult for service providers to satisfy the needs of users. A solution is to assign a profile to each user in order to optimize and automate the(More)
Today, the IPTV technology is emerging as a new concept for delivering and accessing audiovisual services over IP networks. To allow the transmission of IPTV services on wired and wireless networks, different issues should be overcome: scalability, QoS provisioning, security guaranty, and terminals heterogeneity. In this regards, there is a relation between(More)
Nowadays, mobile user terminals are usually composed of multiple network interfaces and multiple processors. This means there are usually several independent ways of satisfying the immediate Quality of Service (QoS) expected by the user. Dynamic decision engines are used for selecting the most power-efficient interface and performance states in order to(More)
Nowadays's authentication methods are essentially based on cryptography or any other kind of secret information. These methods are particularly efficient but they are, in certain cases, very power-hungry. As energy is a scarce resource in wireless sensor networks, we propose a new approach that consists in utilising the physical properties of the(More)