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In this study, we investigate the correlation between security and spatial resolution -a measure of service quality- in cluster-based wireless sensor networks (WSN). We analyze the tradeoff between these two concepts resulting from the limited channel capacity. We propose a method based on combinatorial optimization to determine the best tradeoff between security and spatial resolution for cases where...
In this study we proposed a scheme to achieve adequate coverage while maximizing network lifetime in a sensor network. The proposed approach is based on controlling the number of active sensors using information theory. It assumes that the area of coverage is divided into grids and uses a threshold probability to decide whether the sensors should be ON or OFF. Based on the number of ON sensors in...
In this study we tested the average delay and packet loss performance of access networks under variable bit rate (VBR) video traffic. We used ns-2 simulator to perform the simulations, and actual as well as synthetically generated ON/OFF sources with ON and OFF times taken from exponential or Pareto distributions are used as inputs to the simulated networks. To make sure that the synthetic sources...
In this study, we investigate the correlation between security and spatial resolution - a measure of service quality - in cluster-based wireless sensor networks (WSN). We analyze the tradeoff between these two concepts resulting from the limited channel capacity and propose a method to determine the best tradeoff between security and spatial resolution for cases where network capacity is not sufficient...
In this study, we have investigated the security aspects of wireless local area networks and discussed the weaknesses associated with various conventional 802.11 security protocols such as WEP and 802.1X. We propose an architecture to control access to 802.11 wireless networks, based on roles, location and time information, using the tested wired network components such as VPNs and Firewalls. The...
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