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Browsing Book Edition by Author "Badache, Nadjib"

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    An Architectural Model for a Mobile Agents System Interoperability
    (Springer, 2007) Zeghache, Linda; Badache, Nadjib; El Maouhab, Aouaouche
    An important goal in mobile agent technology is interoperability between various agent systems. A way of achieving this goal would be to envisage a standard to be imposed on these various “agents systems” in order to allow the inter-working of various architectures of mobile agents. During the past years, different scientific communities proposed to different standardization actions, such as the Foundation for Physical Intelligent Agents (FIPA) and the Object Management Group’s MASIF (Mobile Agent System Interoperability Facilities). Although, they finally share some major targets, the OMG and FIPA current results show their distinct origins, particularly for interoperability between or within distributed systems. In this paper, we first analyze the similarities and differences, advantages and disadvantages of the Object Management Group (OMG) mobile agent and the Foundations for Intelligent Physical Agents (FIPA) intelligent agent approaches. Based on this analysis, we try to integrate these two standards to propose an architectural model for mobile agents system interoperability
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    An Ω-Based Leader Election Algorithm for Mobile Ad Hoc Networks
    (Springer Berlin Heidelberg, 2012) Melit, Leila; Badache, Nadjib
    Leader election is a fundamental control problem in both wired and wireless systems. The classical statement of the leader election problem in distributed systems is to eventually elect a unique leader from a fixed set of nodes. However, in MANETS, many complications may arise due to frequent and unpredictable topological changes. This paper presents a leader election algorithm based on the omega failures detector, where inter-node communication is allowed only among the neighboring nodes along with proofs of correctness. This algorithm ensures that every connected component of the mobile ad hoc network will eventually elect a unique leader, which is the node of the highest priority value from among all nodes within that connected component. The algorithm can tolerate intermittent failures, such as link failures, network partitions, and merging of connected network components.
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    Design of Wearable Health Monitoring Systems: An Overview of Techniques and Technologies&
    (Springer International Publishing, 2016) Boulemtafes, Amine; Badache, Nadjib
    Because of the increasing costs of healthcare, wearable health monitoring systems (WHMS) are catching a lot of attention of the research community. Such systems are more and more propelled by advances in technology such as miniaturization, sensing devices and wireless communications. This study aims to review and synthesis the main implementation techniques and technologies used to design WHM Systems on the basis of the typical WBAN three-tiers architecture where the Body Area Network (BAN) represents the key infrastructure of such systems.
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    ELS: Energy-Aware Some-for-Some Location Service for Ad Hoc Mobile Networks
    (Springer Berlin Heidelberg, 2006) Derhab, Abdelouahid; Badache, Nadjib; Tari, Karim; Sami, Sihem
    In this paper, we propose a new location service for Ad hoc mobile networks. The network area is divided into non-overlapping zones. Using a hash function, a node identifier is mapped to a set of zones, in which the location information of the node are stored. We also propose a location information distribution scheme that achieves low rate of outdated location information. Using cross-layer design, the service can tolerate servers mobility and failure, and last for a long time period. Simulation Results show that the proposed location service experiences low overhead and high location information availability and accuracy.
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    Optimisation de la Consommation d'energie pour le Routage dans les Reseaux Mobiles Ad hoc
    (Editions Universitaires Europeennes, 2011) Djenouri, Djamel; Badache, Nadjib
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    Performance Analysis of Binding Update in Mobile IP during Handoff
    (Springer Berlin Heidelberg, 2004) Tandjaoui, Djamel; Badache, Nadjib; Bouabdallah, Abdelmadjid
    Mobile IP protocol was proposed to handle users mobility on Internet. However, Mobile IP suffers from many drawbacks especially handoff latency. In this paper, we investigate the loss of successive binding update requests and their impact on handoff latency. We show that handoff latency increases in case of successive binding update requests loss. We propose an enhancement of binding update in Mobile IP. It consists on reducing the timeout to half just after the loss of the first binding update. So, the mobile node sends two binding update requests within a timeout. By doing so, we increase the probability that one binding update request reach the home agent. We present an analytical model of handoff latency based on packets loss probability. The simulation shows that our solution reduces considerably the additional handoff latency induced by successive binding update requests loss.
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    Providing Reliability for Transactional Mobile Agents
    (Springer Berlin Heidelberg, 2013) Zeghache, Linda; Hurfin, Michel; Moise, Izabela; Badache, Nadjib
    A transactional agent is a mobile agent that migrates from a site to another one in order to execute a distributed transaction assigned by a user. Works on transactional mobile agents have identified two problems that can not be solved by the agent alone. The first one is related to the reliability. The lack of a fault tolerant infrastructure and methodologies that address fault tolerant execution of mobile agents highlights a major drawback of this technology. The second problem for which the agent needs assistance is related to the atomic validation of the transaction. In this paper we address the mobile agent fault tolerance and the transactional support.
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    Providing Reliability for Transactional Mobile Agents
    (Vincent Guyot, 2013) Zeghache, Linda; Hurfin, Michel; Moise, Izabela; Badache, Nadjib
    A transactional agent is a mobile agent that migrates from a site to another one in order to execute a distributed transaction assigned by a user. Works on transactional mobile agents have identified two prob- lems that can not be solved by the agent alone. The first one is related to the reliability. The lack of a fault tolerant infrastructure and method- ologies that address fault tolerant execution of mobile agents highlights a major drawback of this technology. The second problem for which the agent needs assistance is related to the atomic validation of the transac- tion. In this paper we address the mobile agent fault tolerance and the transactional support
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    Security in Mobile Ad hoc Networks Detection and lsolation of Selfish Nodes
    (LAP LAMBERT Academic Publishing, 2010-11) Djenouri, Djamel; Badache, Nadjib
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    Selfish Behavior on Packet Forwarding: An Emergent Security Problem in MANET
    (Auerback Publisher, 2008) Djenouri, Djamel; Badache, Nadjib
    The limitation in energy resources along with the multi-hop nature of mobile ad hoc networks (MANETs) causes a new vulnerability, that does not exist in traditional networks. To preserve its own battery, a node may behave selfishly and would not forward packets originated from other nodes, while using their services and consuming their resources. This deviation from the correct behavior represents a potential threat against the quality and the availability of the forwarding service. Recently, this challenging problem received more and more attention among researchers, and some solutions have been proposed. Still, to the best of our knowledge, no paper surveying these solutions has been published yet. In this entry, we deal with the emergent problem of node selfishness in MANETs, and we provide a state-of-the-art on the current proposed solutions.
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    Wearable Health Monitoring Systems: An Overview of Design Research Areas
    (Springer International Publishing, 2016) Boulemtafes, Amine; Badache, Nadjib
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    Wearable Health Monitoring Systems: An Overview of Design Research Areas
    (Springer International Publishing, 2016) Boulemtafes, Amine; Badache, Nadjib
    In order to be effective and helping towards improving quality of living of people, design and development of wearable health monitoring systems needs to satisfy a number of medical and non-medical criteria’s while taking in consideration resource limitations and fulfilling ergonomic constraints. This study with the aim to serve as a quick reference for future works, attempts to cover main research areas including requirements, challenges and tradeoffs related to the design of such systems.