LAVETE Laboratory


LAVETE Laboratory

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Mohtadi M.T.,LAVETE Laboratory | Deraoui A.,LAVETE Laboratory | Allali H.,LAVETE Laboratory | Hajami A.,LAVETE Laboratory
International Conference on Multimedia Computing and Systems -Proceedings | Year: 2017

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 of goals, research & judgment, evaluation and monitoring). Using our TBS has allowed us to examine patterns of individual navigations through the HLE that reflect quality of self-regulation, the nature of the privileged pathways of learners, resources visited and time spent on each type of cognitive regulatory activity. This article describes the structure of the TBS and the results of his experiment. © 2016 IEEE.

El Fatimi Y.,LAVETE Laboratory | Mohammed F.,LAVETE Laboratory | Ezzati A.,LAVETE Laboratory
ACM International Conference Proceeding Series | Year: 2016

Wireless Sensor Networks usage is spreading throughout many aspects of life, such as health, military, security, environment monitoring and others, providing more important services with less efforts and costs. The rational energy consumption in WSNs is one of the main fields of scientific researches that have been done on the different layers of the protocols' stack, LEACH is an energy-efficient routing protocol based on the clustering technique that expands the lifetime span of a WSN remarkably. However the randomly chosen cluster head may be located near to another one, thing that causes a useless waste of energy that is proportional to the number of cluster heads located close to each others. A proposed distributed algorithm is designed by applying game theory concepts to design a non-cooperative game and a Nash Equilibrium solution's concept to avoid this issue, by computing a value of the probability to be cluster head, that takes into account the localization of other neighbor cluster heads. © 2016 ACM.

Dyabi M.,1 University of Settat | Saadoune M.,Hassan II University Mohammedia - Casablanca | Hajami A.,LAVETE Laboratory | Allali H.,1 University of Settat
International Review on Computers and Software | Year: 2015

A Mobile Ad-hoc network (MANET) is formed when group of mobile wireless nodes collaborate between them to communicate through wireless links in the absence of the fixed infrastructure and any centralized control. Clustering is the most popular method developed to provide hierarchy and resource management over mobile ad hoc networks. In the literature, several clustering approaches were proposed. They generally differ on the cluster head selection criteria. In this work we present a novel mobility metric for mobile ad hoc networks which is subsequently used as a basis for cluster formation. Our algorithm gives major improvements regarding the number and the mobility value of elected cluster heads. Analysis and simulation results are used to show the performance of our algorithm compared with other clustering algorithms in literature. Copyright © 2015 Praise Worthy Prize S.r.l. - All rights reserved.

Mohammed F.,LAVETE Laboratory | Badr C.,LAVETE Laboratory | Abdellah E.,LAVETE Laboratory
International Conference on Next Generation Networks and Services, NGNS | Year: 2014

In wired networks there are different physical devices routing the traffic centrally. By consequence, we can create paths in the network by using multiple management rules, but in Ad-Hoc network nodes this work must be done in an autonomous way. For that there are three types of routing protocol proactive, reactive and hybrid. The first one continuously calculates the possible paths to be available at the time of transmission. The second one creates the roads only when they are needed. And the last one is a combination between the two methods. In this study we will focus on three routing protocols AODV, OLSR and ZRP; and compare their performance in terms of loss packets and energy efficient. © 2014 IEEE.

Ben Alla S.,LAVETE Laboratory | Ezzati A.,LAVETE Laboratory | Mouhsen A.,IMMII Laboratory | Beni Hssane A.,University Chouab Doukkali University | Hasnaoui M.L.,University Chouab Doukkali University
2011 3rd International Conference on Next Generation Networks and Services, NGNS'2011 | Year: 2011

The deployment of wireless sensor networks in many application areas requires self organization of the network nodes into clusters. The clustering Algorithm is a kind of key technique used to reduce energy consumption. Efficient way to enhance the lifetime of the system is to partition the network into distinct clusters with a high energy node as cluster head. The different methods of node clustering techniques have appeared in the literature. In this article we propose a new protocol called Balanced and Centralized Distributed Energy Efficient Clustering scheme for heterogeneous wireless sensor networks (BCDEEC), which the Base Station ensure that the high energy nodes becoming a gateways and cluster heads to improve network lifetime and average energy savings. Once the cluster heads and associated clusters are created, cluster-head-to-gateway routing is used to transfer the data to the base station to reduce the energy consumption of cluster head and decrease probability of failure nodes. Finally, the simulation results show that BCDEEC is more energy efficient and is more effective in prolonging the network life time and prolong the time interval before the death of the first node than current important clustering protocols in heterogeneous environments. © 2011 IEEE.

Hnini A.,LAVETE Laboratory | Fihri M.,LAVETE Laboratory | Ezzati A.,LAVETE Laboratory | Hajami A.,LAVETE Laboratory | Hanini M.,LAVETE Laboratory
Journal of Theoretical and Applied Information Technology | Year: 2015

A group of Wireless mobile nodes and a base station constitute a typical ad-hoc network. This group is Wireless Sensor Network. Each node has a random mobilization and a limited energy. Their battery’s powers play an important role to extend lifespan. This problem is solved by hierarchical protocols, but they are not effective with mobility. Random mobility generates the packets loss. To manage these packets, there are two protocols proposed to control node mobility; namely LEACH-mobile and CBR Mobile. In this work, we have ameliorated the W-LEACH protocol to a new one called W-LEACH-Mobile in two ways. In the first one, we have invested the idea proposed by W-LEACH to increase network life time in a decentralized manner. In the Second, we have managed packets loss generated with node mobility. Finally, we compare this new protocol with LEACH and LEACH-Mobile protocols in terms of energy deception, and with LEACH, W-LEACH and W-LEACH-Decentralized in terms of packets loss. © 2005-2015 JATIT & LLS. All rights reserved.

Hnini A.,LAVETE Laboratory | Ezzati A.,LAVETE Laboratory | Hajami A.,LAVETE Laboratory
International Conference on Multimedia Computing and Systems -Proceedings | Year: 2014

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 their emergency to deliver data. We presented a technical with two dynamic parameters to improve QoS. Consist the first one is packet size and the second the next time to send data packets sensor on LEACH protocol. Those are varied depending on the state of network to stabilize network state in order to support multimedia traffic. In this ways we minimize delays gathering successive data packets from the same node. With the implementation of our technical in Network Simulator (ns2) we have improved QoS parameters including reducing network congestion end to end delay and traffic overload. Thereafter our result was compared with same preceding studies which consist of an evaluation of LEACH QOS behaviour subject to multimedia traffic. © 2014 IEEE.

Hnini A.,LAVETE Laboratory | Mohcin A.,LAVETE Laboratory | Ezzati A.,LAVETE Laboratory | Hajami A.,LAVETE Laboratory
International Conference on Next Generation Networks and Services, NGNS | Year: 2012

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 metrics. Also, the simulation results show LEACH protocol with multimedia traffic which gives the best performance and low energy consumption. © 2012 IEEE.

Badr C.,LAVETE Laboratory | Mohammed F.,LAVETE Laboratory | Abdellah E.,LAVETE Laboratory
Journal of Theoretical and Applied Information Technology | Year: 2014

Sensor networks offer several services; especially in the area of monitoring, such as environmental and medical observation. Routing protocols open an avenue of research, especially in the delivery of the information between network nodes.Increase the life of a sensor network is a major challenge in the research subject, particularly with devices characterized by batteries as energy sources and storage devices and calculates limited, making the process complicated routing, since we must take account of these constraints in the development of a new protocol. Our work item on the reduction of energy and it is minimizing traffic, HRP and a new protocol that handles all this is affecting both the Mac layer and the network layer. The results obtained in the simulation protocol and effective in this level (energy) compared to other protocols of the same type.In this article we treated the mechanisms that ensure quality of service, at the energy consumption, are more we will try to explain how our protocol at the network layer. © 2005 - 2014 JATIT & LLS. All rights reserved.

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