Salsabil Gherairi | King AbdulAziz University (KAU) Jeddah, Saudi Arabia (original) (raw)

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Papers by Salsabil Gherairi

Research paper thumbnail of Adaptive TDMA-based clustering for critical event detection in Wireless Sensor Networks

Fourth International Conference on Communications and Networking, ComNet-2014, 2014

ABSTRACT In this paper, a novel adaptive TDMA-based clustering for critical event detection in Wi... more ABSTRACT In this paper, a novel adaptive TDMA-based clustering for critical event detection in Wireless Sensor Networks (WSN) is proposed. The aim of our adaptive approach is to detect the critical event, such a fire detection in the forest, at the required delay with minimum energy consumption. So, when an event occurs, only the sensor nodes in the detection area will be in active mode, while the others will be in sleep mode. The reaction to the event is made locally. This behavior can consume less energy. The simulation results show that our adaptive approach is better than the non-adaptive approach. We have compared our results to other works and we have proved the efficiency of our approach in terms of energy consumption.

Research paper thumbnail of Optimized TDMA multi-frequency scheduling access protocols for sensor networks

2011 International Conference on Communications, Computing and Control Applications (CCCA), 2011

ABSTRACT Our results are compared with the other works and have showed that our strategy can remo... more ABSTRACT Our results are compared with the other works and have showed that our strategy can remove more interference between neighbors, optimize communication delay and adapt with the maximum number of frequencies in WSN (Wireless Sensor Networks).

Research paper thumbnail of Real-time quality of service with delay guarantee in sensor networks

International Journal of Sensor Networks, 2011

The sensor networks raise fundamental problems for the scientific community. These problems are d... more The sensor networks raise fundamental problems for the scientific community. These problems are due to the wireless communications, the density of nodes distribution, the resources constraints (energy, processor and memory), the low nodes reliability and the strongly distributed nature of the supported application. The specific particularities of the sensor networks make it difficult the guarantee of the real-time quality of service which remains currently an important challenge. This paper presents novel protocol solutions for sensor networks in hard real-time environments. We try to get the optimisation of both constraints at the same time: real-time communication delay guarantee and the energy consumption. Our routing and medium access strategy allows the load balancing, the interferences reduction and the real-time guarantee, for being based on a dynamic generation of real-time communication trees. The simulation results show that our routing and medium access protocols help the traffic load balancing to increase the system lifetime and the guarantee of real-time traffics.

Research paper thumbnail of Data aggregation and pipelining scheduling protocols for real-time wireless sensor networks

International Journal of Ad Hoc and Ubiquitous Computing, 2013

Critical applications in real-time wireless sensor networks require bounded service latency and e... more Critical applications in real-time wireless sensor networks require bounded service latency and energy consumption optimisation. This motivates us to design a novel scheduling approach, which integrates communications with pipelining and data aggregation. The aim of our aggregation technique is to reduce the number of messages, which consequently reduces energy consumption. However, our pipelining technique is defined to minimise communication latency. Our approach is applied on tree wireless sensor networks and in a real-time context, which requires communications without interference. Thus, we use TDMA and a multi-frequency access method based on parent relationship clustering. In this context, we made the necessary mathematical formulation to determine communication response time and to predict the impact of real-time constraints, particularly deadlines, on communication delay. Our simulations outperform the efficiency of our approach to comprise between communication delay and energy consumption constraints.

Research paper thumbnail of Sleep/Wakeup and TDMA Scheduling Access Protocols in Sensor Networks: A Survey

Research paper thumbnail of A Multi-Agent System for Smart Energy Management Devoted to Vehicle Applications: Realistic Dynamic Hybrid Electric System Using Hydrogen as a Fuel

Energies, 2019

Real-time simulation test beds for new zero-emission hybrid electric vehicles are considered as a... more Real-time simulation test beds for new zero-emission hybrid electric vehicles are considered as an attractive challenge for future transport applications that are fully recommended in the laboratory environment. In contrast, new zero-emission hybrid electric vehicles have a more complicated charging procedure. For this reason, an efficient simulation tools development for hydrogen consumption control becomes critical. In this vein, a New Zero Emission Hybrid Electric Vehicle Simulation (NZE-HEVSim) tool for the dynamic Fuel Cell Hybrid-Electric System is proposed to smartly control multisource activities. The designed system consists of a proton-exchange membrane fuel cell used to provide the required energy demand and a Supercapacitor system for energy recovery assistance in load peak or in fast transient. To regulate the supplied power, an efficient Real-Time Embedded Intelligent Energy Management (RT-EM-IEM) is implemented and tested through various constraints. The proposed inte...

Research paper thumbnail of Healthcare: A priority-based energy harvesting scheme for managing sensor nodes in WBANs

Research paper thumbnail of Hybrid Electric Vehicle: Design and Control of a Hybrid System (Fuel Cell/Battery/Ultra-Capacitor) Supplied by Hydrogen

Energies, Apr 2, 2019

Due to its high efficiency and reduced emissions, new zero-emission hybrid electric vehicles have... more Due to its high efficiency and reduced emissions, new zero-emission hybrid electric vehicles have been selected as an attractive challenge for future transport applications. New zero-emission hybrid electric, on the other hand, has some major drawbacks from the complicated charging process. The hybrid electrical fuel cell system is introduced as the main source to intelligently control multi-source activities. An ultra-capacitor system is selected as the energy recovery assistance to monitor the fuel cell's fast transient and peak power during critical periods. To regulate energy demand and supply, an intelligent energy management system is proposed and tested through several constraints. The proposed approach system aims to act quickly against sudden circumstances related to hydrogen depletion in the prediction of the required fuel consumption basis. The proposed strategy tends to define the proper operating system according to energy demand and supply. The obtained results show that the designed system meets the targets set for the energy management unit by referring to an experimental velocity database.

Research paper thumbnail of Multi-Input Single-Output State Space for Hybrid Power System Approach Using PEMFC

International Journal of Energy Optimization and Engineering

This paper presents the utilization of an Ultra-capacitor as an auxiliary power source in a hybri... more This paper presents the utilization of an Ultra-capacitor as an auxiliary power source in a hybrid power system, composed of a Polymer Electrolyte Membrane Fuel Cell (PEMFC) as a main energy source. The PEMFC source may not be sufficient to satisfy the power required, especially, the peak demand periods. So, we use an Ultra-Capacitor (UCap) because it offers a very fast power response and a high specific power. In addition, the UCap can round off the slowdown of the main source output power to produce the effectiveness and performance characteristics needed to a variable load. A regulation for the PEMFC and the UCap was given. Furthermore, a Power Management Unit (PMU) is proposed in order to reach the good functioning of the system. The analysis and the evaluation of the PMU is performed through simulation results to verify the reliability and the effectiveness of the proposed system using Matlab/Simulink environment.

Research paper thumbnail of Adaptive TDMA-based clustering for critical event detection in Wireless Sensor Networks

Fourth International Conference on Communications and Networking, ComNet-2014, 2014

ABSTRACT In this paper, a novel adaptive TDMA-based clustering for critical event detection in Wi... more ABSTRACT In this paper, a novel adaptive TDMA-based clustering for critical event detection in Wireless Sensor Networks (WSN) is proposed. The aim of our adaptive approach is to detect the critical event, such a fire detection in the forest, at the required delay with minimum energy consumption. So, when an event occurs, only the sensor nodes in the detection area will be in active mode, while the others will be in sleep mode. The reaction to the event is made locally. This behavior can consume less energy. The simulation results show that our adaptive approach is better than the non-adaptive approach. We have compared our results to other works and we have proved the efficiency of our approach in terms of energy consumption.

Research paper thumbnail of Optimized TDMA multi-frequency scheduling access protocols for sensor networks

2011 International Conference on Communications, Computing and Control Applications (CCCA), 2011

ABSTRACT Our results are compared with the other works and have showed that our strategy can remo... more ABSTRACT Our results are compared with the other works and have showed that our strategy can remove more interference between neighbors, optimize communication delay and adapt with the maximum number of frequencies in WSN (Wireless Sensor Networks).

Research paper thumbnail of Real-time quality of service with delay guarantee in sensor networks

International Journal of Sensor Networks, 2011

The sensor networks raise fundamental problems for the scientific community. These problems are d... more The sensor networks raise fundamental problems for the scientific community. These problems are due to the wireless communications, the density of nodes distribution, the resources constraints (energy, processor and memory), the low nodes reliability and the strongly distributed nature of the supported application. The specific particularities of the sensor networks make it difficult the guarantee of the real-time quality of service which remains currently an important challenge. This paper presents novel protocol solutions for sensor networks in hard real-time environments. We try to get the optimisation of both constraints at the same time: real-time communication delay guarantee and the energy consumption. Our routing and medium access strategy allows the load balancing, the interferences reduction and the real-time guarantee, for being based on a dynamic generation of real-time communication trees. The simulation results show that our routing and medium access protocols help the traffic load balancing to increase the system lifetime and the guarantee of real-time traffics.

Research paper thumbnail of Data aggregation and pipelining scheduling protocols for real-time wireless sensor networks

International Journal of Ad Hoc and Ubiquitous Computing, 2013

Critical applications in real-time wireless sensor networks require bounded service latency and e... more Critical applications in real-time wireless sensor networks require bounded service latency and energy consumption optimisation. This motivates us to design a novel scheduling approach, which integrates communications with pipelining and data aggregation. The aim of our aggregation technique is to reduce the number of messages, which consequently reduces energy consumption. However, our pipelining technique is defined to minimise communication latency. Our approach is applied on tree wireless sensor networks and in a real-time context, which requires communications without interference. Thus, we use TDMA and a multi-frequency access method based on parent relationship clustering. In this context, we made the necessary mathematical formulation to determine communication response time and to predict the impact of real-time constraints, particularly deadlines, on communication delay. Our simulations outperform the efficiency of our approach to comprise between communication delay and energy consumption constraints.

Research paper thumbnail of Sleep/Wakeup and TDMA Scheduling Access Protocols in Sensor Networks: A Survey

Research paper thumbnail of A Multi-Agent System for Smart Energy Management Devoted to Vehicle Applications: Realistic Dynamic Hybrid Electric System Using Hydrogen as a Fuel

Energies, 2019

Real-time simulation test beds for new zero-emission hybrid electric vehicles are considered as a... more Real-time simulation test beds for new zero-emission hybrid electric vehicles are considered as an attractive challenge for future transport applications that are fully recommended in the laboratory environment. In contrast, new zero-emission hybrid electric vehicles have a more complicated charging procedure. For this reason, an efficient simulation tools development for hydrogen consumption control becomes critical. In this vein, a New Zero Emission Hybrid Electric Vehicle Simulation (NZE-HEVSim) tool for the dynamic Fuel Cell Hybrid-Electric System is proposed to smartly control multisource activities. The designed system consists of a proton-exchange membrane fuel cell used to provide the required energy demand and a Supercapacitor system for energy recovery assistance in load peak or in fast transient. To regulate the supplied power, an efficient Real-Time Embedded Intelligent Energy Management (RT-EM-IEM) is implemented and tested through various constraints. The proposed inte...

Research paper thumbnail of Healthcare: A priority-based energy harvesting scheme for managing sensor nodes in WBANs

Research paper thumbnail of Hybrid Electric Vehicle: Design and Control of a Hybrid System (Fuel Cell/Battery/Ultra-Capacitor) Supplied by Hydrogen

Energies, Apr 2, 2019

Due to its high efficiency and reduced emissions, new zero-emission hybrid electric vehicles have... more Due to its high efficiency and reduced emissions, new zero-emission hybrid electric vehicles have been selected as an attractive challenge for future transport applications. New zero-emission hybrid electric, on the other hand, has some major drawbacks from the complicated charging process. The hybrid electrical fuel cell system is introduced as the main source to intelligently control multi-source activities. An ultra-capacitor system is selected as the energy recovery assistance to monitor the fuel cell's fast transient and peak power during critical periods. To regulate energy demand and supply, an intelligent energy management system is proposed and tested through several constraints. The proposed approach system aims to act quickly against sudden circumstances related to hydrogen depletion in the prediction of the required fuel consumption basis. The proposed strategy tends to define the proper operating system according to energy demand and supply. The obtained results show that the designed system meets the targets set for the energy management unit by referring to an experimental velocity database.

Research paper thumbnail of Multi-Input Single-Output State Space for Hybrid Power System Approach Using PEMFC

International Journal of Energy Optimization and Engineering

This paper presents the utilization of an Ultra-capacitor as an auxiliary power source in a hybri... more This paper presents the utilization of an Ultra-capacitor as an auxiliary power source in a hybrid power system, composed of a Polymer Electrolyte Membrane Fuel Cell (PEMFC) as a main energy source. The PEMFC source may not be sufficient to satisfy the power required, especially, the peak demand periods. So, we use an Ultra-Capacitor (UCap) because it offers a very fast power response and a high specific power. In addition, the UCap can round off the slowdown of the main source output power to produce the effectiveness and performance characteristics needed to a variable load. A regulation for the PEMFC and the UCap was given. Furthermore, a Power Management Unit (PMU) is proposed in order to reach the good functioning of the system. The analysis and the evaluation of the PMU is performed through simulation results to verify the reliability and the effectiveness of the proposed system using Matlab/Simulink environment.