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Performance of beacon safety message dissemination in Vehicular Ad hoc NETworks (VANETs)

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第12期8卷 1990-2004页

作者： YOUSEFI Saleh FATHY Mahmood benslimane abderrahim Computer Engineering Faculty Iran University of Science and TechnologyNarmak Tehran 16846-13114 Tehran Iran Laboratoire d'Informatique d'Avignon LIA 339 chemin des Meinajaries BP 1228-84911 Avignon cedex 9 France

Currently, there is a growing belief that putting an IEEE 802.11-like radio into road vehicles can help the drivers to travel more safely. Message dissemination protocols are primordial for safety vehicular applications. There are two types of safety messages which may be exchanged between vehicles: alarm and beacon. In this paper we investigate the feasibility of deploying safety applications based on beacon message dissemination through extensive simulation study and pay special attention to the safety requirements. Vehicles are supposed to issue these messages periodically to announce to other vehicles their current situation and use received messages for preventing possible unsafe situations. We evaluate the performance of a single-hop dissemination protocol while taking into account the quality of service (QoS) metrics like delivery rate and delay. We realize that reliability is the main concern in beacon message dissemination. Thus, a new metric named effective range is defined which gives us more accurate facility for evaluating QoS in safety applications specifically. Then, in order to improve the performance, the effects of three parameters including vehicle's transmission range, message transmission's interval time and message payload size are studied. Due to special characteristics of the safety applications, we model the relationship between communication-level QoS and application-level QoS and evaluate them for different classes of safety applications. As a conclusion, the current technology of IEEE 802.11 MAC layer has still some challenges for automatic safety applications but it can provide acceptable QoS to driver assistance safety applications.

关键词： Safety applications Inter-vehicle communications Vehicular Ad hoc NETworks (VANETs) Application level QoS Effective range

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Call for Papers Special Issue on Privacy-Preserving Data Mining for Artificial Intelligence of Things

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Big Data Mining and Analytics 2022年第1期5卷 80-80页

作者： Youyang Qu Pierangela Samarati abderrahim benslimane Shui Yu Deakin University Australia University of Milan Italy University of Avignon France University of Technology Australia

Artificial Intelligence of Things(AIoT)is experiencing unimaginable fast booming with the popularization of end devices and advanced machine learning and data processing *** increasing volume of data is being collected every single second to enable Artificial Intelligence(AI)on the Internet of Things(IoT).The explosion of data brings significant benefits to various intelligent industries to provide predictive services and research institutes to advance human knowledge in data-intensive *** make the best use of the collected data,various data mining techniques have been deployed to extract data *** classic scenarios,the data collected from IoT devices is directly sent to cloud servers for processing using diverse methods such as training machine learning models.

关键词： IoT Things services

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Recognition of the hydrogeological potential using electrical sounding in the Khemisset-Tiflet region, Morocco

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Journal of Groundwater Science and Engineering 2020年第2期8卷 172-179页

作者： Fatima Zahra FAQIHI Anasse benslimane abderrahim LAHRACH Mohamed CHIBOUT Mohamed EL MOKHTAR Laboratory Géodynamics and Natural Ressources Faculty of Sciences Dhar El MahrazUniversity Sidi Mohamed Ben AbdellahPB 1796 Fez-Atlas30003Morocco Laboratory of Georessourcesand Environment Faculty of Sciences and TechniqueUniversity Sidi Mohamed Ben AbdellahFES PB 2202-Route d’ImouzzerFES-Morocco Laboratory of Geosciences of Natural Resources Faculty of SciencesUniversity Ibn TofailPB 133Kenitra Morocco

The low recharge of reservoirs and the increasing demand for water limit the potential of mobilized resources, especially in arid to semi-arid areas like Morocco. Integrated management is essential to safeguard this resource. In respect with this perspective, this work provides the analysis of hydrogeological potential of Khemisset-Tiflet region, which falls within the action area of the Sebou Hydraulic Basin Agency. The basis of our studies was as follows:(1) The interpretation of the existing geoelectric data;(2) application of geophysical methods for non-destructive reconnaissance and their integration into a Geographic Information System(GIS). The analysis demonstrates that: The map of the isohypses and the geoelectric cross-section of the substratum of the superficial roof aquifer show clearly a plunge associated with development of the Paleozoic roof in the South and the direction of flow of the surface water is from south to north, from the upper zone to the north of the El Kansera dam. These conclusions constitute very useful contribution for any resource management projects in this area.

关键词： Geophysics Geoelectic Aquifer Hydrogeology GIS Khémisset-Tiflet

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