Classical control theory is proposed to give a general framework for designing congestion control algorithms for ABR service in ATM networks. The algorithm is entirely implemented at the source whereas the switches in the network are: in... more
Classical control theory is proposed to give a general framework for designing congestion control algorithms for ABR service in ATM networks. The algorithm is entirely implemented at the source whereas the switches in the network are: in charge of supplying the feedback. Switches ...
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Abstract This paper has focused on two rate-based congestion control algorithms, namely TCP-friendly rate control (TFRC) and the adaptive rate control (ARC), for streaming flows over the Internet. After a brief description of the two... more
Abstract This paper has focused on two rate-based congestion control algorithms, namely TCP-friendly rate control (TFRC) and the adaptive rate control (ARC), for streaming flows over the Internet. After a brief description of the two algorithms, computer simulations using ns-2 have been reported to investigate intra-protocol fairness, inter-protocol friendliness and efficiency. The main results are given:(1) ARC is friendly towards Reno TCP whereas TFRC is not;(2) ARC increases fairness;(3) ARC remarkably improves the goodput with respect ...
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Research Interests: Mathematics, Computer Science, Communication systems, Synchronization, Cryptography, and 11 moreCommunication System, Control Applications, Oscillators, Circuits, Secure Communication, Cryptosystem, Public Key Cryptosystems, DT Signal+generators, Electronic Circuit, Nonlinear Equations, and Synchronisation
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Abstract The success of the Internet has been in large part due to the end-to-end design principle of the TCP/IP. Moreover, it is widely recognized that the additive increase multiplicative decrease paradigm (AIMD), implemented by the... more
Abstract The success of the Internet has been in large part due to the end-to-end design principle of the TCP/IP. Moreover, it is widely recognized that the additive increase multiplicative decrease paradigm (AIMD), implemented by the standard Reno TCP algorithm, is at the core of the Internet stability. Westwood TCP introduces the Additive Increase Adaptive Decrease (AIAD) paradigm for the Internet congestion control. This paper proposes a mathematical model for the steady state Westwood TCP throughput. The ...
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Abstract In order to provide service differentiation in 802.11 wireless local area networks, the 802.11 e working group has recently proposed the hybrid coordination function (HCF) along with a HCF controlled channel access (HCCA).... more
Abstract In order to provide service differentiation in 802.11 wireless local area networks, the 802.11 e working group has recently proposed the hybrid coordination function (HCF) along with a HCF controlled channel access (HCCA). However, the 802.11 e proposal does not specify an effective bandwidth allocation algorithm. Recently, to overcome this limitation, a control theoretic framework has been proposed in literature. Within such a framework, this paper proposes a new allocation algorithm based on a proportional-integral-derivative ( ...
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Abstract. TCP NewReno is the standard transport protocol originally designed to transport bulk data over the Internet. During the years it has been very successful to provide Internet stability due to its conges-tion control scheme.... more
Abstract. TCP NewReno is the standard transport protocol originally designed to transport bulk data over the Internet. During the years it has been very successful to provide Internet stability due to its conges-tion control scheme. However TCP is not very suitable for multimedia ...
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Among the problems affecting the current version of TCP are the slow recovery upon a coarse timeout expira-tion on long, fat pipes, and the reaction to random segment losses. Both problems are known to reduce the throughput of a... more
Among the problems affecting the current version of TCP are the slow recovery upon a coarse timeout expira-tion on long, fat pipes, and the reaction to random segment losses. Both problems are known to reduce the throughput of a connection. In our papel; we propose and ...
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Research Interests: Engineering, Applied Mathematics, Computer Science, Distributed Computing, Manufacturing, and 15 moreFlexible Manufacturing, Resource Allocation, Deadlock Avoidance, Manufacturing systems, Negative Affect, Case Study, Manufacturing Engineering, Theoretical Analysis, Operant Conditioning, Production System, System performance, Performance Indicator, Simulation Analysis, Deadlock, and Flexible Manufacturing System
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Two major features characterize the congestion control problem in modern data networks:(1) propagation delays, which may have an adverse impact on the stability of closed loop congestion control algorithms, and (2) time− varying available... more
Two major features characterize the congestion control problem in modern data networks:(1) propagation delays, which may have an adverse impact on the stability of closed loop congestion control algorithms, and (2) time− varying available bandwidth. To deal efficiently with these issues, it is proposed to design the controller by employing both dead− time and feed− forward disturbance compensation. Dead− time compensation provides an output that quickly matches the command signal, whereas feed− forward compensation rejects the ...
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The aim of this paper is to make a contribution in the context of both hyperchaos synchronization and cryptography. The approach illustrated herein, which exploits the concept of observer from system theory, is at first applied for... more
The aim of this paper is to make a contribution in the context of both hyperchaos synchronization and cryptography. The approach illustrated herein, which exploits the concept of observer from system theory, is at first applied for synchronizing via a scalar signal two recent examples ...
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In this Letter backstepping design is proposed for controlling chaotic systems. The tool consists in a recursive procedure that combines the choice of a Lyapunov function with the design of feedback control. The advantages of the method... more
In this Letter backstepping design is proposed for controlling chaotic systems. The tool consists in a recursive procedure that combines the choice of a Lyapunov function with the design of feedback control. The advantages of the method are the following: (i) it represents a systematic procedure for controlling chaotic or hyperchaotic dynamics; (ii) it can be applied to several circuits and systems reported in literature; (iii) stabilization of chaotic motion to a steady state as well as tracking of any desired trajectory can be achieved. In order to illustrate the general applicability of backstepping design, the tool is utilized for controlling the chaotic dynamics of the Lorenz system and Chua's circuit. Finally, numerical simulations are carried out to show the effectiveness of the technique.
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In this paper a method for synchronizing high dimensional chaotic systems is developed. The objective is to generate a linear error dynamics between the master and the slave systems, so that synchronization is achievable by exploiting the... more
In this paper a method for synchronizing high dimensional chaotic systems is developed. The objective is to generate a linear error dynamics between the master and the slave systems, so that synchronization is achievable by exploiting the controllability property of linear systems. The suggested approach is applied to Cellular Neural Networks (CNNs), which can be considered as a tool for generating complex hyperchaotic behaviors. Numerical simulations are carried out for synchronizing CNNs constituted by Chua's circuits.
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Research Interests: Mechanical Engineering, Computer Science, Distributed Computing, Computational Complexity, Resource Allocation, and 11 moreResource sharing, System Dynamics, Deadlock Avoidance, Manufacturing Engineering, Feedback Control, Production System, Electrical And Electronic Engineering, Deadlock, dynamic model, Flexible Manufacturing System, and Real time implementation
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ABSTRACT Developing an efficient object tracking system has been an interesting challenge in wireless sensor network communities. Due to the severe resource constraints of sensor hardware, the accuracy of the tracking system could be... more
ABSTRACT Developing an efficient object tracking system has been an interesting challenge in wireless sensor network communities. Due to the severe resource constraints of sensor hardware, the accuracy of the tracking system could be compromised by the processing ...
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This paper presents a feedback control algorithm for ATM congestion control in which ABR source rates are throttled according to VC queue levels at intermediate nodes along the path. The goal is to fill in the residual bandwidth,... more
This paper presents a feedback control algorithm for ATM congestion control in which ABR source rates are throttled according to VC queue levels at intermediate nodes along the path. The goal is to fill in the residual bandwidth, without exceeding a specified queue threshold. In ...
Research Interests: Computer Science, Technology, Congestion Control, Queueing theory, System Dynamics, and 13 moreFlow Control, Performance Evaluation, Mathematical Sciences, Feedback Control, Oscillations, First Order Logic, Feedback loop, Dynamic System, Cascade, Queue, Smith Predictor, Propagation delay, and network congestion
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Abstract—This paper focuses on the analysis of carrier sensing mechanisms adopted by the 802.11 medium access control. Through an analytical study, a mechanism to dynamically set the Carrier Sensing Range is presented. The mechanism... more
Abstract—This paper focuses on the analysis of carrier sensing mechanisms adopted by the 802.11 medium access control. Through an analytical study, a mechanism to dynamically set the Carrier Sensing Range is presented. The mechanism improves the spatial reuse by avoiding the interference of neighbor nodes. Simulation results show that setting the Carrier Sensing Range according to the proposed model optimizes the network goodput. Additional simulations without Virtual Carrier Sensing enabled confirm the analytical results and ...
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Abstract—Wireless mesh networks are quickly emerging as a solution for broadband wireless connectivity. The physical layer technology is making remarkable progress allowing higher bandwidth and longer distance coverage than before. While... more
Abstract—Wireless mesh networks are quickly emerging as a solution for broadband wireless connectivity. The physical layer technology is making remarkable progress allowing higher bandwidth and longer distance coverage than before. While standardization efforts are going on to define new standards and paradigms for Wireless Mesh Networks, many vendors sell mesh solutions based on the 802.11 b technology. This standard has been originally designed for Wireless Local Area Networks in indoor scenarios with a maximum ...