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Despite the expanded efforts, the vehicular ad-hoc networks (VANETs) are still facing many challenges such as network performances, network scalability and context-awareness. Many solutions have been proposed to overcome these obstacles, and the edge computing, an extension of the cloud computing, is one of them. With edge computing, communication, storage and computational capabilities are brought...
After a disaster, much of infrastructure is no longer usable, including telecommunications. The hours following a disaster are crucial. Thus, we must find a solution to allow rescuers to communicate with the survivors or at least to locate them. This telecommunication solution must also enable communication between rescuers to facilitate their coordination for greater speed and efficiency. In this...
Cognitive radio networks aim to allow nodes to be aware of their radio environment. Therefore, cognitive radio equipment can select the best frequency band and modulation to communicate with any surrounding node. This enables efficient spectrum sharing and the transmission parameters optimization according to the needed quality of service. In this article, we firstly present a physical layer signaling...
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 satisfy the QoS while increasing the battery...
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 different frequency bands without prior synchronisation...
Transmissions of multimedia data in emergency context such as, the occurrence of trauma or stroke are sensitive to the network delay, throughput and packet loss. Depending on the urgency, the communication channel quality can decide the survival of a patient. For saving lives, network infrastructure offering good Quality of Service (QoS), high broadband and low communication cost must be considered...
Medical multimedia data transmission for remote diagnosis and emergency incident reports will significantly increase in the coming years. Thus, broadband network technologies with ability to be adaptable to user's context and application content must be considered. In this paper, we propose an on-the-fly resource reservation protocol for medical multimedia content delivery in cognitive radio networks...
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 performance requirements but should also be aware and...
Ensuring high quality of communication while reducing interference remains a challenge in unplanned wireless mobile networks. The Cognitive Radio Ad Hoc Networks (CRAHNs) with cooperative sensing promise to be an appropriate solution for achieving high data rates. In this article, we evaluate the impact of cognitive radio transmissions on primary radio communications by characterizing precisely based...
The goal of the pervasive connectivity is to enable mobile users to be permanently connected to the Internet. Mobile users are often connected to wireless networks and consuming services that require quality of service guarantees. Accessing services using wireless technologies may make the service delivery vulnerable to security attacks because of the open medium of these technologies. In this context,...
This paper investigates the integration of e-Health in Next Generation Networks. It provides a detailed model for an easy integration of e-Health services within the IP Multimedia Subsystem (IMS) with heterogeneous monitoring networks. We show how the IMS functionalities can be extended to fully support pervasive and context aware healthcare with third party application services.
The ageing population that becomes a predominant demographic feature in most countries raises new challenges in healthcare. Over the past years, the focus was shifted from institutional-based healthcare to automatic healthcare systems by leveraging the sensing technologies and the communication infrastructures. The aim is to provide the elderly and people with physical and/or cognitive impairment...
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 transmission medium in order to calculate, when receiving...
In this paper, we specify a global service level guarantee including not only QoS but also security and taking into account user mobility. This global service level could be guaranteed within several autonomic computing systems managed by different autonomic domain managers. For that purpose, we propose an end-to-end Service Level Negotiation Protocol, called SLNP, to provide those autonomic managers...
In this paper, we propose an end-to-end service level negotiation protocol which enables a global service offer covering quality of service (QoS) and security while taking into account user's mobility in this offer. This protocol provides all the domains involved in the transport of a various offered services with a negotiation capability to achieve an agreement on a service level. This paper shows...
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