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The goal of this paper is to present exact formulae for the throughput of IEEE 802.11 networks in the absence of transmission errors and for various physical layers, data rates and packet sizes. Calculation of the throughput is more than a simple exercise. It is a mandatory part of provisioning any system based on 802.11 technology (whether in ad-hoc or(More)
Recent research in sensor networks has raised security issues for small embedded devices. Security concerns are motivated by the deployment of a large number of sensory devices in the field. Limitations in processing power, battery life, communication bandwidth and memory constrain the applicability of existing cryptography standards for small embedded(More)
Recent research in sensor networks has raised issues of security for small embedded devices. Security concerns are motivated by the deployment of a large number of sensory devices in the field. Limitations in processing power, battery life, communication bandwidth and memory constrain the applicability of existing cryptography standards for small embedded(More)
— We consider the problem of determining the positions of wireless nodes using range measurements from multiple , sparsely located, beacon stations with known locations. A large number of such nodes surrounding the beacon stations automatically and cooperatively estimate their position through collaborative efforts and iterative refinements. These positions(More)
WLAN IEEE 802.11 Networks should be designed primarily for capacity. In a typical infrastructure WLAN network, now it demands more devices to connect in single network since business-critical applications rely on a Wi-Fi network also the amount of data transmitted wirelessly has significantly increasing which includes voice calls made over Wi-Fi, HD video(More)
Security in Embedded systems is emerging as a growing issue in recent times. Limitations in processing power and communications bandwidth and the mismatch between wide arithmetic for security(32 bit word operations) and embedded data bus widths(8 or 16 bits) offer a great challenge in implementing encryption algorithms for embedded systems. The variability(More)
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