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Mobility management in Wireless Sensor Networks is considered to be of an up most importance for today's critical applications. In this paper, we present a soft mobility management solution where the mobility procedures are supported by fuzzy logic techniques. Our solution was designed and implemented to support the movement of a mobile worker inside an oil refinery area. The results show that the...
Power is a critical resource in sensor networks, especially when the nodes are un-tethered and used in long running applications. Many approaches have been developed to exploit the inherent space and time redundancy in the data collected by sensor networks by using selective querying. In selective querying, at any given time, only a percentage of the nodes is queried; the rest are put in sleep mode...
Remote monitoring of physical effort has a great importance in the treatment of some cardiopathies. Nowadays, wearable motion-tracking devices represent an easy solution to acquire relevant data. We demonstrate a system based on a commercial sensor that sends real-time information to a hospital via a mobile gateway -the patient's cell phone- in the same Bluetooth WPAN.
Coverage control is a basic research problem in wireless sensor networks (WSNs). This paper proposes a distance optimization based coverage control algorithm, which utilizes ant colony algorithm to place sensor nodes to an appropriate position and optimize the moving path of mobile sensor nodes. The proposed algorithm not only guarantees the biggest coverage of wireless sensor networks, but also reduces...
The seamless combining with context-aware sensors and numerous devices and e-home server will soon become a part of our home environment in the near future. We name it as a context-aware home based on ubiquitous computing concept. This context-aware home reduces participations of users in order to realize a ubiquitous computing and automates various services. Therefore, the risk of privacy violation...
The localization algorithm in wireless sensor network is always a hot spot. Information collected by the sensors is meaningless without the position of the sensors. Now, paying little attention to 3-D space, most of the algorithms are for 2-D space. In this paper we introduce a novel algorithm for 3-D space called OBS (Optimal Beacon Selection) algorithm. In this algorithm we launched the concept...
Summary form only given. Wireless sensor networks create an innovative technology that enables users to monitor and study the physical world at an extremely high resolution. Query processing in such ad-hoc environments is a challenging task due to the complexities imposed by the inherent energy and communication constraints. To this end, the research community has proposed to take into account user-defined...
The increasing ubiquity of mobile embedded systems has been matched by the evolution of a variety of wireless network standards and technologies. The major constraints of wireless embedded systems are limitations of communication bandwidth, processing capabilities, and battery power. Remote wireless embedded systems often act as sensors, which provide data to a certain community. The exchange of data...
A principal factor in sensor network design is energy efficiency. In this work, we propose to extend the lifetime of sensor networks using appropriate choice of sensor node distribution. The key idea of our scheme is to deploy more nodes in areas of extensive energy usage. Using this scheme of sensor node distribution, we use probabilistic angular routing to route data packets from the sensor nodes...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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