Fahimeh Paydar - Academia.edu (original) (raw)
Papers by Fahimeh Paydar
2021 6th South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM), 2021
This work demonstrates performance results of Software-Defined Networking (SDN) testing that were... more This work demonstrates performance results of Software-Defined Networking (SDN) testing that were carried out on typical network topologies by using simulation. Specifically, the performance metrics that were examined included: the topology setup and tear down time, the CPU and RAM usage of the system and the latency of packet transfer between nodes. The entire investigation was conducted on a Windows PC using a Virtual Machine for running a Mininet emulator. From the meticulous analysis of the results, it is worth mentioning the following: (i) the total number of switches in a SDN architecture has a significant influence on CPU load. (ii) The RAM (Random Access Memory) consumption dependents on the number of hosts and in circumstances of excessive load it shows much higher increase compared to the usage of the CPU. (iii) The overall performance depends significantly on the type of topology and its properties.
Software-Defined Networking (SDN) is a viable approach for management of large and extensive netw... more Software-Defined Networking (SDN) is a viable approach for management of large and extensive networks with flexible quality of service requirements and huge data traffic. Due to the central role of SDN controllers in traffic engineering and performance of software-defined networks on one hand, and diversity of available SDN controllers on the other hand, an evaluation framework is required to study and compare the architectural choices and performance of distributed and centralized SDN controllers in action. In this paper, we propose a comprehensive framework for performance evaluation of OpenFlow SDN controllers. In this simulation platform, we analyze both centralized and decentralized architectures for controller deployment. Performance of controllers is evaluated based on Quality of Service (QoS) measures including delay and throughput in different network topologies under different workloads. The impact of routing protocols on controller performance in data center networks is also analyzed. Our results can provide valuable insights for scalable design and proper deployment of SDN controllers in the real world scenarios.
JOIV : International Journal on Informatics Visualization, Feb 17, 2020
In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, dev... more In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, device mobility and data communication over wireless channels make the multi-hop routing a very challenging task. Due to mission-critical applications of MANET, dealing with these challenges through the design of a Quality of Service (QoS)-assured protocol is a substantial problem. Mobility in MANETs is commonly considered as a negative factor on quality, although we suggest that the right approach to mobility awareness using wisely selected metrics can lead to a robust and QoS-assured protocol. In this paper, we propose QMAR-AODV, a QoS-assured Mobility-Aware Routing protocol which is an optimized version of AODV protocol. We utilize a combination of stability and quality metrics including Mobility Ratio (MR(C,E)) between nodes in a route, Energy Efficiency and congestion load to choose the most stable and QoS-assured routes. Our simulation results show that QMAR-AODV protocol outperforms E2E-LREEMR and reduces route instability, end-to-end delay, data retransmissions and packet loss by 8.3% 10.9% 10.6% and 5.4 respectively, while increases data reception and network throughput by 5.1% and 4.8% respectively, compared to E2E-LREEMR routing protocol.
Journal of Communications Technology, Electronics and Computer Science, Nov 4, 2019
Edge computing is a promising paradigm where resource processing is close to the edge of the Inte... more Edge computing is a promising paradigm where resource processing is close to the edge of the Internet. Due to an increasing number of devices forming an interconnected network of devices in the Internet of Things (IoT) leading a huge amounts of data are produced. Internet traffic usage has been significantly increased over the years. In this paper, we examine the current edge computing architectures, their challenge associativity availing respective current state-of-the-art solutions. Formerly, we state the enabling features of edge computing in IoT development and some edge computing challenges with respect to their IoT applications. We conclude the paper by summarizing solutions in both IoT and edge computing in the tables, regarding the identified challenges.
Journal of Communications Technology, Electronics and Computer Science, Nov 4, 2019
Software-Defined Networking (SDN) is a viable approach for management of large and extensive netw... more Software-Defined Networking (SDN) is a viable approach for management of large and extensive networks with flexible quality of service requirements and huge data traffic. Due to the central role of SDN controllers in traffic engineering and performance of software-defined networks on one hand, and diversity of available SDN controllers on the other hand, an evaluation framework is required to study and compare the architectural choices and performance of distributed and centralized SDN controllers in action. In this paper, we propose a comprehensive framework for performance evaluation of OpenFlow SDN controllers. In this simulation platform, we analyze both centralized and decentralized architectures for controller deployment. Performance of controllers is evaluated based on Quality of Service (QoS) measures including delay and throughput in different network topologies under different workloads. The impact of routing protocols on controller performance in data center networks is a...
JOIV : International Journal on Informatics Visualization
In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, dev... more In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, device mobility and data communication over wireless channels make the multi-hop routing a very challenging task. Due to mission-critical applications of MANET, dealing with these challenges through the design of a Quality of Service (QoS)-assured protocol is a substantial problem. Mobility in MANETs is commonly considered as a negative factor on quality, although we suggest that the right approach to mobility awareness using wisely selected metrics can lead to a robust and QoS-assured protocol. In this paper, we propose QMAR-AODV, a QoS-assured Mobility-Aware Routing protocol which is an optimized version of AODV protocol. We utilize a combination of stability and quality metrics including Mobility Ratio (MR(C,E)) between nodes in a route, Energy Efficiency and congestion load to choose the most stable and QoS-assured routes. Our simulation results show that QMAR-AODV protocol outperforms ...
2021 6th South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM), 2021
This work demonstrates performance results of Software-Defined Networking (SDN) testing that were... more This work demonstrates performance results of Software-Defined Networking (SDN) testing that were carried out on typical network topologies by using simulation. Specifically, the performance metrics that were examined included: the topology setup and tear down time, the CPU and RAM usage of the system and the latency of packet transfer between nodes. The entire investigation was conducted on a Windows PC using a Virtual Machine for running a Mininet emulator. From the meticulous analysis of the results, it is worth mentioning the following: (i) the total number of switches in a SDN architecture has a significant influence on CPU load. (ii) The RAM (Random Access Memory) consumption dependents on the number of hosts and in circumstances of excessive load it shows much higher increase compared to the usage of the CPU. (iii) The overall performance depends significantly on the type of topology and its properties.
Software-Defined Networking (SDN) is a viable approach for management of large and extensive netw... more Software-Defined Networking (SDN) is a viable approach for management of large and extensive networks with flexible quality of service requirements and huge data traffic. Due to the central role of SDN controllers in traffic engineering and performance of software-defined networks on one hand, and diversity of available SDN controllers on the other hand, an evaluation framework is required to study and compare the architectural choices and performance of distributed and centralized SDN controllers in action. In this paper, we propose a comprehensive framework for performance evaluation of OpenFlow SDN controllers. In this simulation platform, we analyze both centralized and decentralized architectures for controller deployment. Performance of controllers is evaluated based on Quality of Service (QoS) measures including delay and throughput in different network topologies under different workloads. The impact of routing protocols on controller performance in data center networks is also analyzed. Our results can provide valuable insights for scalable design and proper deployment of SDN controllers in the real world scenarios.
JOIV : International Journal on Informatics Visualization, Feb 17, 2020
In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, dev... more In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, device mobility and data communication over wireless channels make the multi-hop routing a very challenging task. Due to mission-critical applications of MANET, dealing with these challenges through the design of a Quality of Service (QoS)-assured protocol is a substantial problem. Mobility in MANETs is commonly considered as a negative factor on quality, although we suggest that the right approach to mobility awareness using wisely selected metrics can lead to a robust and QoS-assured protocol. In this paper, we propose QMAR-AODV, a QoS-assured Mobility-Aware Routing protocol which is an optimized version of AODV protocol. We utilize a combination of stability and quality metrics including Mobility Ratio (MR(C,E)) between nodes in a route, Energy Efficiency and congestion load to choose the most stable and QoS-assured routes. Our simulation results show that QMAR-AODV protocol outperforms E2E-LREEMR and reduces route instability, end-to-end delay, data retransmissions and packet loss by 8.3% 10.9% 10.6% and 5.4 respectively, while increases data reception and network throughput by 5.1% and 4.8% respectively, compared to E2E-LREEMR routing protocol.
Journal of Communications Technology, Electronics and Computer Science, Nov 4, 2019
Edge computing is a promising paradigm where resource processing is close to the edge of the Inte... more Edge computing is a promising paradigm where resource processing is close to the edge of the Internet. Due to an increasing number of devices forming an interconnected network of devices in the Internet of Things (IoT) leading a huge amounts of data are produced. Internet traffic usage has been significantly increased over the years. In this paper, we examine the current edge computing architectures, their challenge associativity availing respective current state-of-the-art solutions. Formerly, we state the enabling features of edge computing in IoT development and some edge computing challenges with respect to their IoT applications. We conclude the paper by summarizing solutions in both IoT and edge computing in the tables, regarding the identified challenges.
Journal of Communications Technology, Electronics and Computer Science, Nov 4, 2019
Software-Defined Networking (SDN) is a viable approach for management of large and extensive netw... more Software-Defined Networking (SDN) is a viable approach for management of large and extensive networks with flexible quality of service requirements and huge data traffic. Due to the central role of SDN controllers in traffic engineering and performance of software-defined networks on one hand, and diversity of available SDN controllers on the other hand, an evaluation framework is required to study and compare the architectural choices and performance of distributed and centralized SDN controllers in action. In this paper, we propose a comprehensive framework for performance evaluation of OpenFlow SDN controllers. In this simulation platform, we analyze both centralized and decentralized architectures for controller deployment. Performance of controllers is evaluated based on Quality of Service (QoS) measures including delay and throughput in different network topologies under different workloads. The impact of routing protocols on controller performance in data center networks is a...
JOIV : International Journal on Informatics Visualization
In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, dev... more In Mobile Ad Hoc Networks (MANETs), lack of a fixed infrastructure, dynamic network topology, device mobility and data communication over wireless channels make the multi-hop routing a very challenging task. Due to mission-critical applications of MANET, dealing with these challenges through the design of a Quality of Service (QoS)-assured protocol is a substantial problem. Mobility in MANETs is commonly considered as a negative factor on quality, although we suggest that the right approach to mobility awareness using wisely selected metrics can lead to a robust and QoS-assured protocol. In this paper, we propose QMAR-AODV, a QoS-assured Mobility-Aware Routing protocol which is an optimized version of AODV protocol. We utilize a combination of stability and quality metrics including Mobility Ratio (MR(C,E)) between nodes in a route, Energy Efficiency and congestion load to choose the most stable and QoS-assured routes. Our simulation results show that QMAR-AODV protocol outperforms ...