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We have formulated and combined three problems: clustering, firewall placement and network hierarchy into one optimization problem, where the objective function is to minimize the total design cost of the synthesized network, while maximizing its security and scalability. Due to the computational complexity of the combined three problems, we have developed a custom-made intelligent algorithm based...
The performance of the existing network topology may be improved through various redesign techniques, which involves relocating customers and consolidation of clusters (sub-networks). Since the simulation study provides a virtual environment for assorting desirable features and analyzing the performance of the network under various scenarios, it is beneficial to go for a simulation study before the...
Nowadays, the rapidly changing technology development and the demand to provide high-end solutions to customers needs increase the opportunity of networking various small enterprises, offering service oriented businesses. The existing value network should be, viewed as a fluid infrastructure, clustering together various enterprises (sub-networks). Based on the business scenario of individual enterprises'...
Many researchers view the value of the enterprise network through its utilization. If the network utilization is low, then its economical value and benefit are diminished. Also, the rapidly changes in network technologies, customers' demands and economical factors increase the opportunity for viewing the network as a dynamic infrastructure, so that its values can be adapted accordingly. Based on these...
We have proposed a design and analysis tool for network topology, where it combined a custom-made design/redesign methodology and a commercial simulation program, OPNET modeler. Here we assume an existing network with C clusters as a reconfigurable architecture and we have proposed a number of redesign techniques to reduce the extra-traffic and maximize the intra-traffic, the traffic within the clusters...
In recent years, there are several design issues in computer networks such as clustering and hierarchy, which have been in the spotlight. This is due to the desires to improve the network performance and scalability. The clustering problem is to partition the network's clients into a minimal set of clusters to maximize the local cluster traffic. The hierarchy problem is to connect all clients' clusters...
The paper examines the resources needed to carry on all the tasks within wireless sensor networks (WSN) by modeling the data-aggregation within WSN as a scheduling problem. A typical sensor executes three tasks periodically, which are mainly sensing, processing and transmitting. We have modeled the sensorpsilas three tasks as a task-flow graph (TFG), and then we have combined all TFGs for all sensors...
Nowadays many network administrators and customers are anticipating the network infrastructure to be adaptable to changes so that networks can provide better services. The existing network should be viewed as a fluid infrastructure, which has unproblematic setup to carry out redesigns. Here we have proposed a number of redesign techniques on the customers' clusters (sub-networks), since many customers...
This work explores the automatic placement of actors within wireless sensor-actor network through an evolutionary approach. A wireless sensor network (WSN) consists of two sets of nodes: sensors and actors, where the set of sensors performs all the sensing (data collection) from their surrounding environment. Since sensors operate by batteries, then they are limited with their processing and communication...
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