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With the advances of mobile ad hoc networks, reducing control traffic has become one of the most important fields that need to be addressed in different routing protocols. In such networks, where optimized link state routing (OLSR) is used as a routing protocol, each node broadcasts the topology control (TC) messages so as to share the network topology with other devices. Furthermore, and in order...
This article presents a “trace-based system” (TBS) integrated in a hypermedia learning environment (HLE). This HLE also includes metacognitive incentives with the aim of increasing the self-regulated learning behavior among learners. Digital traces of the activities recorded by the system enabled us to evaluate how learners performed metacognitive activities (orientation by objectives, planning, specification...
In Mobile Ad hoc Networks (MANETs), with Optimized Link State Routing Protocol (OLSR) the mobility concept is an essential element which can result in the evolution of network performances. In this paper, the main objective is to develop an algorithm to improve the MultiPoint Relay (MPR) selection process in such networks. This algorithm is based on the Mobility Rate (MR) which in turn is relied on...
Vehicular Ad Hoc Network (VANET) is an instance of MANETs that establishes wireless connections between vehicles. Recently, it was shown for the case of highway traffic that position-based routing protocols can very well deal with the high mobility of network vehicles. In VANETs, these routing protocols must be adapted to vehicular-specific capabilities and requirements. As many previous works have...
Vehicular Ad-hoc networks (VANETs) are an emerging class of wireless networks for data exchange between vehicles or between vehicles and infrastructure. They attract interest both from the point of view of the automobile industry as operators of networks and services, in order to provide new technologies that improve the safety and efficiency of road transport. Following this vision, we seek in this...
Mobility is one of the basic features that define an ad hoc network, an asset that leaves the field free for the nodes to move. The most important aspect of this kind of network turns into a great disadvantage when it comes to commercial applications, take as an example: the automotive networks that allow communication between a groups of vehicles. The ad hoc on-demand distance vector (AODV) routing...
Mobile ad hoc networks (MANETs) is a multihop wireless communication network supporting mobile users (nodes) without any existing infrastructure and depend of the individual behavior of the nodes. This nature of MANETs imposes the cooperation among nodes to improve quality of service and security especially that mobility and energy are the most important criteria in MANETs. In such networks, devices...
In this paper, we'll try to discuss the cooperation of nodes representing one of the important factors in improving the quality of service (QoS) and security in mobile ad hoc networks (MANETs). The routing protocols for MANETs are designed based on the assumption that all participating nodes are fully cooperative. In such networks, the Selfish behaviour is among the big challenges and can lead to...
Mobility is one of the basic features that define an ad hoc network, an asset that leaves the field free for the nodes to move. The most important aspect of this kind of network turns into a great disadvantage when it comes to commercial applications, take as an example: the automotive networks that allow communication between a groups of vehicles. The ad hoc on-demand distance vector (AODV) routing...
A mobile ad hoc network (MANET) is a dynamic wireless network which can be formed without the need for any pre-existing infrastructure in which each node can act as a router. In comparison with fixed networks, some new security issues have arisen with the introduction of MANETs. Secure routing, in particular, is an important and complicated issue. Organizing mobile nodes into manageable clusters can...
Wireless sensor networks have gained major attention from most of the recent research community. One of the important issues in this type of networks is the inherent limited power of the network sensor nodes. Hierarchical routing protocols are incorporate of efficiently balancing the load on the sensor nodes. But, dice the death of some nodes to the network begins to deteriorate more and more. This...
The objective of this paper is to present the architecture of a pedagogical agent dedicated to provide a metacognitive scaffolding through interactive learning environments (ILE). Such a learning situation requires a well-developed metacognitive competence since learner is often alone with the computer. ILEs do not provide any support at this level. For this reason we had the idea of designing a pedagogical...
A mobile ad hoc network (MANET) is a wireless network without the support of any fixed infrastructure. Security is one of the main challenges in ad hoc network due to dynamic topology and mobility of nodes.
The limited energy resources of sensor nodes pose challenging issues on the development of protocols for WSN. Introducing clustering into hierarchical protocol reduces number of transmission in the network to reduce their energy deception, then to maximize network lifetime. But the LEACH case is not really reliable in the case of real-time traffic because real-time applications are characterized by...
Wireless multimedia sensor networks (WMSN) are a new emerging technology type of sensor. In this type of application, the networks should maximize Quality of Service (QoS) by minimizing energy dissipation. In this paper, we present the LEACH comportment of the multimedia traffic with our technical communication and we compare with normal traffic. Then we present our proposition to increase the QoS...
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