@conference { ISI:000386851600006, title = {A College Admissions Game for Content Caching in Heterogeneous Delay Tolerant Networks}, booktitle = {2016 23RD INTERNATIONAL CONFERENCE ON TELECOMMUNICATIONS (ICT)}, year = {2016}, note = {23rd International Conference on Telecommunications (ICT), Thessaloniki, GREECE, MAY 16-18, 2016}, abstract = {In recent years, Delay Tolerant Networks (DTNs) have been successfully presented as a possible extension of the Internet architecture in order to provide communication support to existing networks. However, these networks have a major issue which is the coordination among relays. In this paper, we propose a novel mechanism source-relay association approach for heterogeneous DTNs that exploits the information about the history and predictability of the relay nodes while also we focus on the source packet dissemination to a destination using tow-hop relaying scheme, considering network resource constraints: the relay buffer, the packet life time, and the energy consumption according to the mobile technologies. We formulate the problem as a college admissions game in which a number of colleges, i.e., data source seek to recruit a number of students, i.e., relays nodes. In this game, the data source and relays nodes rank one another based on preference functions that capture the data sources need to optimize their utilities which are functions of packet success rate and delay. We propose a novel distributed algorithm that leads to a stable matching among data sources and relays nodes. We show that the proposed approach can yields the better performance improvement of the traffic among the source and destination node.}, isbn = {978-1-5090-1990-8}, author = {Oualhaj, Omar Ait and Sabir, Essaid and Kobbane, Abdellatif and Ben-Othman, Jalel and El Koutbi, Mohammed} } @conference { ISI:000381755100026, title = {An Energy-Aware Clustering Approach Based on the K-Means Method forWireless Sensor Networks}, booktitle = {ADVANCES IN UBIQUITOUS NETWORKING}, series = {Lecture Notes in Electrical Engineering}, volume = {366}, year = {2016}, note = {International Symposium on Ubiquitous Networking (UNet), Casablanca, MOROCCO, SEP 08-10, 2015}, pages = {325-337}, abstract = {This paper describes a new approach to build energy aware clusters for Wireless Sensor Networks (WSN). The algorithm behind is based on the k-means method which is well known as a clustering technique and widely used in several fields of engineering and research. K-means clustering tends to find clusters of comparable spatial extent (density clustering). We try to enhance the clustering process by selecting nodes as clusters that are centric and have a high level of energy. This will give the same QoS results as given by the K-means approach with a reduction of energy consumption and a prolongation of the lifetime of the sensor network. For the simulation purposes, we have implemented our approach on the OLSR routing protocol which has been selected by our research team as a test bed routing protocol. We have compared our new approach (OLSR-Kmeans-Energy) with a previous work we developed and where we use a Max-Min heuristic (OLSR-MaxMin-Energy) to enhance QoS parameters and the lifetime of the WSN. Our new approach seems to give better results than the MaxMin approach.}, isbn = {978-981-287-990-5; 978-981-287-989-9}, issn = {1876-1100}, doi = {10.1007/978-981-287-990-5\_26}, author = {El Mezouary, Ridouane and Choukri, Ali and Kobbane, Abdellatif and El Koutbi, Mohammed}, editor = {Sabir, E and Medromi, H and Sadik, M} } @conference { ISI:000388603102099, title = {Exploiting Multi-homing in Hyper Dense LTE Small-Cells Deployments}, booktitle = {2016 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE}, series = {IEEE Wireless Communications and Networking Conference}, year = {2016}, note = {IEEE Wireless Communications and Networking Conference (WCNC), Doha, QATAR, APR 03-07, 2016}, publisher = {IEEE; IEEE Commun Soc}, organization = {IEEE; IEEE Commun Soc}, abstract = {It is expected that in two-tier LTE heterogeneous networks, an extensive deployment of small cell networks (SCNs) will take place in the near future, especially in dense urban zones; hence a hyper density of SCNs randomly distributed within macro cell networks (MCNs) will emerge with many overlapping zones of neighboring SCNs. Therefore, the problems of interferences in co-channel deployment will be more complicated and then the overall throughput of downlink will substantially decrease. In order to mitigate the effect of interferences in a hyper density of SCNs scenarios, a solution based on a fully distributed algorithm for sharing time access to SCNs and multi-homing capabilities of macro cellular users is proposed to improve the overall data rate of downlink and at the same time to satisfy QoS throughput requirements of macro and home cellular users. Our tentative scheme will also reduce the signaling overhead due to the absence of coordination among small base stations (SBSs) and macro base station (MBS). Results validate our solution and show the improvement attained in a hyper density of SCNs within MCNs compared to open, closed and shared time access mechanisms based on single network selection.}, isbn = {978-1-4673-9814-5}, issn = {1525-3511}, author = {Walid, Abdellaziz and Sabir, Essaid and Kobbane, Abdellatif and Taleb, Tarik and El Koutbi, Mohammed} } @article { ISI:000379694400006, title = {Group vertical handoff management in heterogeneous networks}, journal = {WIRELESS COMMUNICATIONS \& MOBILE COMPUTING}, volume = {16}, number = {10}, year = {2016}, month = {JUL}, pages = {1256-1270}, abstract = {Traditional vertical handover schemes postulate that vertical handovers (VHOs) of users come on an individual basis. This enables users to know previously the decision already made by other users, and then the choice will be accordingly made. However, in case of group mobility, almost all VHO decisions of all users, in a given group (e.g., passengers on board a bus or a train equipped with smart phones or laptops), will be made at the same time. This concept is called group vertical handover (GVHO). When all VHO decisions of a large number of users are made at the same time, the system performance may degrade and network congestion may occur. In this paper, we propose two fully decentralized algorithms for network access selection, and that is based on the concept of congestion game to resolve the problem of network congestion in group mobility scenarios. Two learning algorithms, dubbed Sastry Algorithm and Q-Learning Algorithm, are envisioned. Each one of these algorithms helps mobile users in a group to reach the nash equilibrium in a stochastic environment. The nash equilibrium represents a fair and efficient solution according to which each mobile user is connected to a single network and has no intention to change his decision to improve his throughput. This shall help resolve the problem of network congestion caused by GVHO. Simulation results validate the proposed algorithms and show their efficiency in achieving convergence, even at a slower pace. To achieve fast convergence, we also propose a heuristic method inspired from simulated annealing and incorporated in a hybrid learning algorithm to speed up convergence time and maintain efficient solutions. The simulation results also show the adaptability of our hybrid algorithm with decreasing step size-simulated annealing (DSS-SA) for high mobility group scenario. Copyright (c) 2015 John Wiley \& Sons, Ltd.}, issn = {1530-8669}, doi = {10.1002/wcm.2599}, author = {Walid, Abdellaziz and Kobbane, Abdellatif and Mabrouk, Abdelfettah and Sabir, Essaid and Taleb, Tarik and El Koutbi, Mohammed} } @conference { ISI:000390683500018, title = {Intrusion Detection System for the Detection of Blackhole Attacks in a Smart Grid}, booktitle = {2016 4TH INTERNATIONAL SYMPOSIUM ON COMPUTATIONAL AND BUSINESS INTELLIGENCE (ISCBI)}, year = {2016}, note = {4th International Symposium on Computational and Business Intelligence (ISCBI), Olten, SWITZERLAND, SEP 05-07, 2016}, pages = {108-111}, publisher = {IEEE; INNS India Reg Chapter; IEEE Computat Intelligence Soc; Fachhochschule Nordwestschweiz}, organization = {IEEE; INNS India Reg Chapter; IEEE Computat Intelligence Soc; Fachhochschule Nordwestschweiz}, abstract = {Smart grid is the new electrical grid that will change forever the way we use energy, thanks to the deployment of sensing and communication technologies. It allows consumers to become more aware and in control of their energy consumption. However, the pervasive communication infrastructure deployed inside the smart grid makes it a target to different types of attacks, which is why security is an essential element in building a robust grid. In this article we develop an Intrusion Detection System (IDS) that uses data mining techniques for the detection of a Denial of service (DOS) attack in a smart grid, the so called blackhole attack.}, isbn = {978-1-5090-3488-8}, author = {Boumkheld, Nadia and Ghogho, Mounir and El Koutbi, Mohammed} } @article { ISI:000351605500008, title = {Data traffic-based analysis of delay and energy consumption in cognitive radio networks with and without resource reservation}, journal = {INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS}, volume = {28}, number = {7}, year = {2015}, month = {MAY 10}, pages = {1316-1328}, abstract = {A new opportunistic cross-layer MAC protocol involving channel allocation and packet scheduling for cognitive radio networks is proposed. Cognitive radio allows secondary users (SUs) to exploit the available portions of the licensed spectrum bands without interfering with primary users. In particular, we consider a cognitive radio system, where SUs are equipped with two transceivers: a control transceiver and a software-defined radio transceiver. Data traffic characteristics of SUs are considered to ameliorate system performance. So, we propose a mechanism of resource reservation to improve QoS requirements that favors successful SUs to transmit data during x time slots without interfering with primary users. The key novelty of this paper is giving priority for SUs with important data traffic and which frequently solicits data channels to transmit for the remaining time of the ongoing time slot and for the next time slots directly after checking the channel availability. We develop a new analytical model to evaluate delay parameter for two scenarios with and without resource reservation and we then investigate the impact of those scenarios on the energy consumption. We show through simulations that cognitive radio performances increase noticeably with the proposed scheme. Copyright (c) 2014 John Wiley \& Sons, Ltd.}, issn = {1074-5351}, doi = {10.1002/dac.2764}, author = {Elmachkour, Mouna and Kobbane, Abdellatif and Sabir, Essaid and Ben-Othman, Jalel and El Koutbi, Mohammed} } @conference { ISI:000381477900200, title = {On Improving Network Capacity for Downlink and Uplink of Two-Tier LTE-FDD Networks}, booktitle = {2015 INTERNATIONAL WIRELESS COMMUNICATIONS \& MOBILE COMPUTING CONFERENCE (IWCMC)}, series = {International Wireless Communications and Mobile Computing Conference}, year = {2015}, note = {11th IEEE International Wireless Communications and Mobile Computing Conference (IEEE IWCMC), Dubrovnik, CROATIA, AUG 24-25, 2015}, pages = {1168-1173}, publisher = {IEEE; IEEE Croatia Sect; Univ Dubrovnik}, organization = {IEEE; IEEE Croatia Sect; Univ Dubrovnik}, abstract = {A Long Term Evolution-Frequency Division Duplexing (LTE-FDD) small cell is one of the promising solutions for improving service quality and data rate in both the uplink and downlink of home users. Small cell (e.g., femtocell, picocell, microcell) is short range, low cost and low power base station installed by the indoor consumers. However, the avoidance of interferences is still an issue that needs to be addressed for successful deployment of small base stations (SBS) within existing macro cell networks mainly in co-channel deployment. Moreover, interferences are strongly dependent on the type of access control of small cells. Closed and open access are in conflict interests for macro users and home users in the uplink and downlink. To mitigate this conflict, we propose a fully distributed algorithm based on the shared time access and executed by LTE-FDD small cells, in order to reduce the effect of interferences, improve QoS of users, and maximize the overall capacity of downlink and uplink in two-tier LTE networks when small cells are deployed randomly. Simulation results validate our algorithm and show the improvement attained in offloading macro cell and satisfying QoS requirements of home users compared to the closed and open access mechanisms in both the uplink and downlink.}, isbn = {978-1-4799-5344-8}, issn = {2376-6492}, author = {Walid, Abdellaziz and Sabir, Essaid and Kobbane, Abdellatif and Taleb, Tarik and El Koutbi, Mohammed} } @conference { ISI:000380409500024, title = {Modelling Intelligent and Reliable Ferry Routes in Wireless Sensor Networks using Polling Systems Theory}, booktitle = {2015 10TH INTERNATIONAL CONFERENCE ON INTELLIGENT SYSTEMS: THEORIES AND APPLICATIONS (SITA)}, year = {2015}, note = {10th International Conference on Intelligent Systems - Theories and Applications (SITA), ENSIAS, Rabat, MOROCCO, OCT 20-21, 2015}, publisher = {IEEE}, organization = {IEEE}, abstract = {This paper proposes a new model for finding intelligent and reliable ferry routes using a continuous polling system to ensure a better transportation of messages between wireless nodes and the corresponding sink. We consider that the Wireless Sensor Network (WSN) is composed by wireless static sensor nodes and several mobile ferries that collect information from all the sensors in the network. We have used a pure birth process to model the reliability aspect of the nodes in the network. We have considered several cases: with one ferry and N ferries moving in the same area. We have studied the impact of nodes density and the faulty rate occurrence to find the best and reliable path for the mobile ferry to cover all the nodes of the WSN.}, isbn = {978-1-5090-0220-7}, author = {El Mezouary, Ridouane and Amine Koulali, Mohammed and Kobbane, Abdellatif and El Koutbi, Mohammed} } @conference { ISI:000380509200010, title = {PRoPHET-RAIP5: A New Approach to Secure Routing in Wireless Sensor Networks}, booktitle = {2015 INTERNATIONAL CONFERENCE ON WIRELESS NETWORKS AND MOBILE COMMUNICATIONS (WINCOM)}, year = {2015}, note = {International conference on wireless networks and mobile communications, Marrakech, MOROCCO, OCT 20-23, 2015}, pages = {52-57}, abstract = {Probabilistic routing in wireless sensor network (WSNs) use the mobility history when making a forwarding decision. This type of routing provides a very rapid development and new perspectives in WSNs. However, there are several constraints and challenges to overcome the security problems. In this paper, we propose a security solution based on the RAID5 technology and a multi-path routing, to develop a protective mechanism against the various attacks in mobile WSNs. To demonstrate our concept, we have implemented this solution on Probabilistic Routing Protocol using History of Encounters and Transitivity (PRoPHET). We have compared our new protocol (PRoPHET-RAIP5) with standard PRoPHET to enhance security parameters.}, isbn = {978-1-4673-8224-3}, author = {El Mezouary, Ridouane and Houmz, Abdellah and Jalil, Jamila and El Koutbi, Mohammed} } @conference { ISI:000382389300061, title = {A Signaling Game-based Mechanism to Meet Always Best Connected Service in VANETs}, booktitle = {2015 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM)}, series = {IEEE Global Communications Conference}, year = {2015}, note = {IEEE Global Communications Conference (GLOBECOM), San Diego, CA, DEC 06-10, 2015}, publisher = {IEEE; QUALCOMM; Keysight Technologies; Huawei; Natl Instruments; Intel; InterDigital; LG Elect; IEEE Big Data; IEEE Stand Assoc; ViaSat; IEEE Commun Soc}, organization = {IEEE; QUALCOMM; Keysight Technologies; Huawei; Natl Instruments; Intel; InterDigital; LG Elect; IEEE Big Data; IEEE Stand Assoc; ViaSat; IEEE Commun Soc}, abstract = {In heterogeneous network environments, users need to have mechanisms in place to decide which network is the most suitable at each moment in time for every application that the user requires. Always Best Connected is considered as a special concept to allow users to get connected to Internet using the access technology that best suits their needs or profile at any point in time. Clearly, this concept provides multiple access simultaneously for mobile users moving in heterogeneous access network environment. In this paper, we introduce a signaling game approach to achieve an always best connected service in vehicular networks. Under the considered scenario, we consider two smart vehicles named player 1 and player 2 moving in a road network area equipped with heterogeneous access networks. We assume that player 1 (super player) only has complete information on the road network, whilst player 2 has not any information. Player 1 plays first and sends a signal to player 2 which can be accurate or distorted. Based on the received signal and his belief about that signal, player 2 chooses its own action: it computes its suitable path which provides it an always best connected service.}, isbn = {978-1-4799-5952-5}, issn = {2334-0983}, author = {Mabrouk, Abdelfettah and Kobbane, Abdellatif and Sabir, Essaid and Ben-Othman, Jalel and El Koutbi, Mohammed} } @article { ISI:000348218400023, title = {The Greening of Spectrum Sensing: A Minority Game-Based Mechanism Design}, journal = {IEEE COMMUNICATIONS MAGAZINE}, volume = {52}, number = {12}, year = {2014}, month = {DEC}, pages = {150-156}, abstract = {Cognitive radio technology allows the reuse of the underutilized frequency spectrum on an opportunistic and non-interfering basis by means of introducing, besides the legitimate primary users of the spectrum, a new kind of users called cognitive or secondary users. Thus, reliable spectrum sensing is critical to dynamically detect available licensed frequency bands and mitigate the primary signals, but it remains realistically difficult to carry out. In fact, although distributed collaborative sensing has turned out to be fruitful for the cognitive radio environment, its accuracy is often affected by the selfish and autonomous behavior of users. In this article, we model distributed spectrum sensing and channel allocation as a non-cooperative game, and apply the minority game to bring forth and study the cooperative behavior of users. The novelty brought by our study consists of alleviating the number of users contending for primary channels by giving them the opportunity to choose between the two, either sensing the channel or being inactive during the time slot. To address the trade-off faced by the SUs, we evaluate the performance of two secondary systems in a green communications context: energy consumption and transmission delay.}, issn = {0163-6804}, author = {Elmachkour, Mouna and Sabir, Essaid and Kobbane, Abdellatif and Ben-Othman, Jalel and El Koutbi, Mohammed} } @conference { ISI:000380438500019, title = {Providing Always Best Connected Service in VANET with Complete and Partial Information}, booktitle = {3RD INTERNATIONAL CONFERENCE ON ADVANCED COMPUTER SCIENCE APPLICATIONS AND TECHNOLOGIES ACSAT 2014}, series = {International Conference on Advanced Computer Science Applications and Technologies}, year = {2014}, note = {3rd International Conference on Advanced Computer Science Applications and Technologies (ACSAT), Amman, JORDAN, DEC 29-30, 2014}, pages = {108-112}, publisher = {Design Sci Renaissance; Unitech; Philadelphia Univ; Patrons Peoamp; Ittihad Univ; Univ Siswa Bangsa Int}, organization = {Design Sci Renaissance; Unitech; Philadelphia Univ; Patrons Peoamp; Ittihad Univ; Univ Siswa Bangsa Int}, abstract = {Mobile communication has become the preferred choice of personal communication today. With the rapid proliferation of wireless network technologies, heterogeneous wireless network environments increase more and more. Such environments provide multiple access networks simultaneously for mobile users. Each mobile user wishes to get connected to Internet using the access technology that best suits his needs at any point in time. Always Best Connected is considered as a special concept for mobile users to select their suitable access networks. In this paper, we have presented two scenarios which are based on Always Best Connected concept to provide, for a smart vehicle moving in a road network installed with multiple access technologies, an always best connected service at any point in time. In the first scenario, we assume that the mobile user (vehicle) has complete information on the road network (all access technologies installed in the road network). Whilst the second scenario is the same as the first one except that the mobile user periodically receives a partial information on the road network (only the access technologies installed in the edges which are immediately accessible by mobile user). For both scenarios, we have proposed a graph model to characterize the observed mobility pattern. Also, two algorithms are proposed to find the optimal path that provides always best connected service for vehicles in both scenarios.}, isbn = {978-1-4799-1845-4}, issn = {2379-7738}, doi = {10.1109/ACSAT.2014.26}, author = {Mabrouk, Abdelfettah and Kobbane, Abdellatif and El Koutbi, Mohammed and Sabir, Essaid} } @conference { ISI:000351846000018, title = {A new Cross layer Architecture for Service Differentiation in Wireless Sensor Networks}, booktitle = {2013 IEEE MALAYSIA INTERNATIONAL CONFERENCE ON COMMUNICATIONS (MICC)}, year = {2013}, note = {IEEE 11th Malaysia International Conference on Communications (MICC), Kuala Lumpur, MALAYSIA, NOV 26-28, 2013}, pages = {92-97}, publisher = {IEEE}, organization = {IEEE}, abstract = {This paper describes a new cross-layer architecture that supports service differentiation in Wireless Sensor Networks (WSN). In WSNs, sensor nodes are supposed to communicate using a random access method. We propose a mathematical model that combines parameters form network and MAC layers. We aim to estimate and to enhance the throughput of multi-hop WSNs and the stability of the forwarding queues used for real-time and best-effort traffic. We suppose in this paper that we have one single sink in the WSN and we study the impact of the probability of transmitting (real-time and best-effort traffic), density of sensor and hop count on the end-to-end throughput.}, isbn = {978-1-4799-1532-3}, author = {Loutfi, Ahmed and Mohamed, Senhadji and Sabir, Essaid and Kobbane, Abdellatif and El Koutbi, Mohammed} } @conference { ISI:000312146500145, title = {Channel Allocation Strategies in Opportunistic-based Cognitive Networks}, booktitle = {2012 8TH INTERNATIONAL WIRELESS COMMUNICATIONS AND MOBILE COMPUTING CONFERENCE (IWCMC)}, series = {International Wireless Communications and Mobile Computing Conference}, year = {2012}, note = {8th IEEE International Wireless Communications and Mobile Computing Conference (IWCMC), Limassol, CYPRUS, AUG 27-31, 2012}, pages = {872-877}, publisher = {IEEE; IEEE Cyprus Sect; Frederick Univ}, organization = {IEEE; IEEE Cyprus Sect; Frederick Univ}, abstract = {The idea to allow unlicensed users to utilize licensed bands whenever it would not cause any interference is one of the fundaments of cognitive radio. In this paper we propose some allocation channel strategies to provide more QoS for unlicensed users. We assume that one channel is dedicated for unlicensed users that can eventually use licensed users channels if idle. The first allocation channel strategy reconsiders, in case of unavailable licensed users{\textquoteright}s channels, the request of unlicensed users to be processed by the dedicated channel. The second strategy doesn{\textquoteright}t reconsider it and simply reject it. QoS performances of the two patterns are evaluated and discussed using analytical models and simulations. For the first communication strategy, we based our model on the work of Habachi and Hayel which we enhance. We proceed to some corrections of mathematical and formulations errors. Analytical and simulation results show that the performances offered by the primary channels to secondary user are better than performances offered by the dedicated channel, however, the performance offered by the primary channels are negatively impacted by the cost of sensing.}, isbn = {978-1-4577-1379-8}, issn = {2376-6492}, author = {Belkasmi, Yassin and Kobbane, Abdellatif and El Koutbi, Mohammed and Ben-Othman, Jalel} } @article { ISI:000305225200001, title = {Dynamic power control for energy harvesting wireless multimedia sensor networks}, journal = {EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING}, year = {2012}, abstract = {Optimization of energy usage in wireless sensor networks (WSN) has been an active research field for the last decades and various approaches have been explored. In fact, A well designed energy consumption model is the foundation for developing and evaluating a power management scheme in network of energy constrained devices such as: WSN. We are interested in developing optimal centralized power control policies for energy harvesting wireless multimedia sensor networks (WMSN) equipped with photovoltaic cells. We propose a new complete information Markov decision process model to characterize sensor{\textquoteright}s battery discharge/recharge process and inspect the structural properties of optimal transmit policies.}, issn = {1687-1499}, doi = {10.1186/1687-1499-2012-158}, author = {Koulali, Mohammed-Amine and Kobbane, Abdellatif and El Koutbi, Mohammed and Tembine, Hamidou and Ben-Othman, Jalel} } @conference { ISI:000310353000012, title = {Evaluation of Hybrid Geo-location based on UMTS and OPS Technologies}, booktitle = {2012 INTERNATIONAL CONFERENCE ON MULTIMEDIA COMPUTING AND SYSTEMS (ICMCS)}, year = {2012}, note = {International Conference on Multimedia Computing and Systems (ICMCS), Tangiers, MOROCCO, MAY 10-12, 2012}, pages = {63-67}, publisher = {Morocco Sect MTT/AP Joint Chapter}, organization = {Morocco Sect MTT/AP Joint Chapter}, abstract = {The degree of accuracy and availability of service make a distinction between the two main methods of geolocation that areGPS and UMTS. GPS provides good performances in terms of location in open area, but performances degrade to a significant manner when we go into an enclosed area. While the UMTS offers good results in urban areas, we can note a complementarity between these two techniques. In this paper we present a hybrid algorithm that combines these two techniques and takes best advantage of each of them with two approaches one simple and another advanced.}, isbn = {978-1-4673-1520-3}, author = {Saadane, Rachid and Belkasmi, Mostafa and El Koutbi, Mohammed and Dadda, Mohamed Rachid}, editor = {Essaaidi, M and Zaz, Y} } @conference { ISI:000324984400067, title = {GUI Code Generation for Android Applications Using a MDA Approach}, booktitle = {PROCEEDINGS OF 2012 INTERNATIONAL CONFERENCE ON COMPLEX SYSTEMS (ICCS12)}, year = {2012}, note = {1st International Conference on Complex Systems (ICCS), Agadir, MOROCCO, NOV 05-06, 2012}, pages = {393-398}, abstract = {Developing applications for mobile platforms is a compound task, due to variability of mobile OSs and the number of different devices that need to be supported. Model-Driven Architecture (MDA) approach could provide a possible solution to provide an automated way to generate a Graphical User Interface (GUI) for such applications. In this paper, we propose an approach based on MDA, to generate GUI for mobile applications on smartphones. The adopted approach consists of three main steps (i) analyzing and modeling the GUI under UML; (ii) transforming the obtained diagrams to a simplified XMI schema using JDOM API; and (iii) generating the GUI based on MDA. Our method has the advantages to generate automatically GUI for several platforms, and gives a graphical way for designing in UML.}, isbn = {978-1-4673-4766-2}, author = {Sabraoui, Ayoub and El Koutbi, Mohammed and Khriss, Ismail}, editor = {Essaaidi, M and Nemiche, M} } @conference { ISI:000312146500012, title = {New Insights from a Delay Analysis for Cognitive Radio Networks with and without Reservation}, booktitle = {2012 8TH INTERNATIONAL WIRELESS COMMUNICATIONS AND MOBILE COMPUTING CONFERENCE (IWCMC)}, series = {International Wireless Communications and Mobile Computing Conference}, year = {2012}, note = {8th IEEE International Wireless Communications and Mobile Computing Conference (IWCMC), Limassol, CYPRUS, AUG 27-31, 2012}, pages = {65-70}, publisher = {IEEE; IEEE Cyprus Sect; Frederick Univ}, organization = {IEEE; IEEE Cyprus Sect; Frederick Univ}, abstract = {In wireless communication systems, the delay remains a crucial factor. In this work, we focus on the design of a new opportunistic cross-layer MAC protocol involving channels allocation and packet scheduling for cognitive networks in order to optimize system performance. Cognitive radio provides the opportunity for secondary users (unlicensed users) to use available portions of the licensed spectrum bands without interfering with primary users (licensed users). We consider that each secondary user is equipped with two transceivers. The role of the first transceiver is to obtain and exchange channels information on the control channel. The second transceiver is devoted to periodically detect and dynamically use the available data channels. The paper deals with channel allocation considering traffic characteristics of secondary users. So, we propose a mechanism of resource reservation to improve Quality of Service (QoS) requirements that favors successful secondary users to transmit data during x time slots without interfering with primary users. We develop a new analytical model, while taking into account the backoff mechanism. We analyze delay parameter for two scenarios with and without resource reservation. We show through simulations that our approach guarantees an optimal response delay.}, isbn = {978-1-4577-1379-8}, issn = {2376-6492}, author = {Elmachkour, Mouna and Kobbane, Abdellatif and Sabir, Essaid and El Koutbi, Mohammed} } @conference { ISI:000310353000009, title = {QDGRP : A Hybrid QoS Distributed Genetic Routing Protocol for Wireless Sensor Networks}, booktitle = {2012 INTERNATIONAL CONFERENCE ON MULTIMEDIA COMPUTING AND SYSTEMS (ICMCS)}, year = {2012}, note = {International Conference on Multimedia Computing and Systems (ICMCS), Tangiers, MOROCCO, MAY 10-12, 2012}, pages = {47-52}, publisher = {Morocco Sect MTT/AP Joint Chapter}, organization = {Morocco Sect MTT/AP Joint Chapter}, abstract = {Nature-inspired routing protocols have been subject to a great research activity. Their decentralized nature and low requirements make them highly suitable for Wireless Sensor Networks (WSN) where individual nodes operate without central control and without global overview of the network status to achieve global tasks. This paper proposes a hybrid QoS routing protocol for WSN based on a customized Distributed Genetic Algorithm (DGA) that accounts for delay and energy constraints. The proposed protocol (QDGRP) is compared to AODV w.r.t several performance metrics : end-to-end delay, throughput, packet delivery ratio and energy efficiency. The realized simulations show that QDGRP outperforms AODV and manages to achieve very good performances for various deployment scenarios.}, isbn = {978-1-4673-1520-3}, author = {Koulali, Mohammed-Amine and Kobbane, Abdellatif and El Koutbi, Mohammed and Azizi, Mostafa}, editor = {Essaaidi, M and Zaz, Y} } @conference { ISI:000274539400007, title = {AQM applications in MAODV ad hoc network}, booktitle = {2009 INTERNATIONAL CONFERENCE ON TELECOMMUNICATIONS (ICT)}, year = {2009}, note = {16th International Conference on Telecommunications (ICT), Marrakech, MOROCCO, MAY 25-27, 2009}, pages = {37-40}, abstract = {Disaster relief, education, and military are common situations where nodes need to communicate in areas without any preexisting infrastructure. In these situations, ad-hoc networks are used. Active Queue Management (AQM) has been successfully demonstrated as a solution to the global synchronization problem in the context of wired networks. To the best of our knowledge there is limited research work on the effect of queuing mechanisms in these networks (multicast in particular). We provided performance comparisons of Priority Queuing (PriQ), Drop Tail (DT) and Deficit Round Robin (DRR) which are some queues mechanisms, in ad-hoc network using MAODV protocol.}, isbn = {978-1-4244-2936-3}, doi = {10.1109/ICTEL.2009.5158615}, author = {de Barros, Manuel A. P. and El Koutbi, Mohammed} }