Research Reports

Permanent URI for this collectionhttp://dl.cerist.dz/handle/CERIST/34

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    Securing Distance Vector Routing Protocols for Hybrid Wireless Mish Networks
    (CERIST, 2010-04) Babakhouya, Abdelaziz; Challal, Yacine; Bouabdallah, Abdelmadjid; Gharout, Said
    Hybrid Wireless Mesh Networks (HWMNs) are currently emerging as a promising technology for a wide range of applications such as public safety, emergency response, and disaster recovery operations. HWMNs combine the concepts of mesh networks and ad hoc networks to maintain network connectivity. Routing is essential for HWMN in order to discover the network topology and built routes. The problem of all the current ad hoc routing protocols is that they trust all nodes and assume that they behave properly; therefore they are more vulnerable to nodes misbehavior. Misbehaving nodes can advertise incorrect routing information and disturb the topology building process. This attack is difficult to detect in distance vector routing protocols since nodes have no information regarding the network topology beyond the immediate neighbors. In this paper we propose a Consistency Check protocol for Distance Vector routing in HWMN environment. Our Consistency Check protocol can detect and reject false routes under the assumption that some mesh routers are trusted and do not cheat. Trough security analysis and simulation, we show that our approach is resilient to false accusation attacks while inducing an acceptable routing overhead.
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    On the Relevance of Using Interference and Service Differentiation Routing in the Internet-of-Things
    (CERIST, 2013) Djenouri, Djamel; Bagula, Antoine; Karbab, Elmouatezbillah
    Next generation sensor networks are predicted to be deployed in the Internet-of-the-Things (IoT) with a high level of heterogeneity, using a model where the sensor motes will be equipped with different sensing and communication devices and tasked to deliver different services leading to different energy consumption patterns. The application of traditional wireless sensor routing algorithms designed for sensor motes expanding the same energy to such heterogeneous networks may lead to energy unbalance and subsequent short-lived sensor network resulting from routing the sensor readings over the most overworked sensor nodes while leaving the least used nodes idle. Building upon sensor devices service identification, this paper assess the relevance of using sensor node service differentiation to achieve efficient traffic engineering in IoT settings and its relative efficiency compared to traditional sensor routing. Performance evaluation with simulation reveals clear improvement of the proposed protocol vs. state of the art solutions in terms of load balancing, notably for critical nodes that cover more services. Results show that the proposed protocol considerably reduce the number of packets routed by critical nodes, where the difference with the compared protocol becomes more and more important as the number of nodes rises. Results also show clear reduction in the average energy consumption.