Abolfazl Toroghi Haghighat

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The advent of various real-time multimedia applications in high-speed networks prompt the necessity of quality of service (QoS) based multicast routing and the constrained Steiner tree as the mathematical structure behind it which is a well- known NP-complete problem. Two important QoS constraints are the bandwidth constraint and the end-to-end delay(More)
Scheduling algorithms are one of the most important algorithms in operating systems. These algorithms have been designed for optimized use of processes from processors. One of the best algorithms for scheduling processor is Multi Layer Feedback Queue (MLFQ), algorithm which is based on use of several queues with different quanta. The most serious problem of(More)
Computing the bandwidth-delay-constrained least-cost multicast routing tree is an NP-complete problem. In this paper, we propose a novel QoS-based multicast routing algorithm based on the genetic algorithms (GA). In the proposed method, the connectivity matrix of edges is used for genotype representation. Some novel heuristic algorithms are also proposed(More)
Computing the bandwidth-delay-constrained least-cost multicast routing tree is an NP-complete problem. In this paper, we propose a novel QoS-based multicast routing algorithm based on the genetic algorithms (GA). In the proposed algorithm, the connectivity matrix of edges is used for genotype representation. Some novel heuristics are also proposed for(More)
Target tracking is one of the applications of wireless sensor network which is set up in the areas of field surveillance, habitat monitoring, and intruder tracking. Energy saving is one of the main challenges in target tracking sensor networks. In this paper, we present a Clustering and Prediction-Based Protocol (CPBP) for Target Tracking in Wireless Sensor(More)
The advent of various real-time multimedia applications in high-speed networks creates a need for quality of service (QoS) based multicast routing. Two important QoS constraints are the bandwidth constraint and the end-to-end delay constraint. The QoS based multicast routing problem is a known NP-complete problem that depends on (1) bounded end-to-end delay(More)
0140-3664/$ see front matter 2008 Elsevier B.V. A doi:10.1016/j.comcom.2008.09.027 * Corresponding author. Tel.: +989123725237. E-mail addresses: shokrzadeh@gmail.com (H. Sh niau.ac.ir (A.T. Haghighat). Rumor routing is a classic routing algorithm based on agents’ random walk. This paper proposes a novel approach based on this routing algorithm. Here, we(More)
Wireless sensor networks (WSN) are currently being applied to energy conservation applications such as light control. We propose a design for such a system called a lighting automatic control system (LACS). The LACS system contains a centralized or distributed architecture determined by application requirements and space usage. The system optimizes the(More)