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We present the analysis, design and implementation of an intelligent classroom whose two main components are realized using two emergent wireless technologies, namely, wireless sensor networks and Radio-frequency identification (RFID) tags. The combination of these two technologies produces a powerful and versatile solution that can offer automated access control to a classroom as well as the monitoring...
As a novel information acquiring and processing technology, WSN (wireless sensor network) is made by the convergence of sensor, micro-electro-mechanism system and networks technologies. WSN consist of small nodes with sensing, computation and wireless communication capabilities. Various architectures have been developed for WSN, depending upon the requirement of application. WSN are used in different...
The application of wireless sensor transient field measurement network trying to get high data sampling rate, high fidelity data by using wireless sensor node, with the constrain of wireless communication bandwidth and energy consumption. Smart and compact routing is a critical issue in this system, which plays a role of middleware in sensor network software architecture. The route select estimator...
An effective solution is proposed to enhance capability of the emergency communication by wireless mesh network technology. The characteristic of wireless mesh network technology is analyzed. Based on practical circumstance, a new mesh network structure and topology have been devised, which are applied to meet an emergency. It has improved the router protocol, analyzed its feasibility, and proposed...
We propose a novel distributed cross-layer optimization approach for cognitive radio wireless networks. A cognitive radio is a wireless device that is capable of sensing the prevailing environmental conditions and automatically adapting its operating parameters in order to enhance the performance of both the system and potentially the whole network. Given the lack of a centralized intelligence to...
This paper presents a distributed fermat-point range estimation strategy, which is important in the moving sensor localization applications. The fermat-point is defined as a point which minimizes the sum of distances from three sensors inside a triangle. This point is indeed at the trianglepsilas center of gravity. We solve the problems of large errors and poor performance in the bounding box algorithm...
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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