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In Wireless Sensor Networks (WSN), a tradeoff between the network lifetime (limited by energy of sensors) and redundancy of actively sensing and communicating sensors (induced by coverage requirements for the measured area) has to be established, typically in an over-deployed environment. This is achieved by scheduling algorithms which periodically alternate the state of sensors between "asleep"...
Sensor networks will play a key role in future smart environments. Sensor nodes which are used to form wireless sensor networks, are limited energy resources and have low power capabilities. Thus, sensor networks need to be energy efficient. When they are deployed in military environments, they also need strong security services. In this paper, an improved energy-efficient security scheme is proposed...
In this paper, we investigate the transmission-power assignment problem for k-connected mobile ad hoc networks (MANETs), the problem of optimizing the lifetime of a MANET at a given degree k of connectivity by minimizing power consumption. Our proposed solution is fully distributed and uses a model-based transmission power adaptation strategy based on model-predictive control. Specifically, a stochastic...
Considering characteristics of wireless sensor networks,control mechanisms must be scalable, adaptive, robust, fully distributed, and self-organizing. In this paper, we focus on topology control for periodic data gathering, which certainly is one of typical applications of WSNs. We propose a novel mechanism based on a biological self-organization mechanism, that is, a reaction-diffusion model, to...
Wireless sensor networks are generally deployed in hostile environment so the security service is the essential part of wireless sensor networks. To achieve the security service, key management is the fundamental one. Many key management schemes have been proposed considering the characteristics of sensor nodes. Despite the advances of key management techniques, wireless sensor networks still have...
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