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We present a solution for integrating RFID technology in academic libraries by offering cost effectiveness and good quality of service. On the one hand, we challenge hardware issues which include optimization of the layout of the RFID system by minimizing the total number of used devices, avoiding collision between them and capturing all tags. On other hand, the main challenge in designing powerful...
Nodes localization in mobile sensor networks can be dealt as a problem of mobile object tracking. The particle filters algorithm which is based on Bayesian estimation and Monte Carlo method is an effective tool to deal with these problems. The particle filters algorithm adopts a series of weighted particles to represent the possible position of a mobile object, and then makes use of the present observation...
In the near future, first responders such as firefighters might be supported by sensor nodes, both installed before the incident and placed by the responders themselves. To communicate with these sensor nodes, the first responders could be equipped with hand held devices, e.g. PDAs with wireless LAN, additionally equipped with a radio module of the same type as used by the sensor nodes. This scenario...
As tracking applications for moving objects become more challenging, demands for accurate and reliable tracking methods using wireless sensor networked devices increase. The use of received signal strength (RSS) of the propagated signals, provided by most sensor radios, is the popular means of achieving such a task. Despite the great RSS variation, which may result in inaccurate estimation of the...
The expected lifetime of any wireless sensor network is a critical issue as sensor nodes are powered by small batteries. One effective approach for energy conservation, especially in high density networks, consists on switching alternatively nodes in sleep/active modes, while ensuring at the same time continuous monitoring (i.e., coverage and connectivity). In this paper we propose a novel approach...
Small sized devices with communication capability are accepted in real applications recent years and the applications increase business efficiency. We developed an asset tracking application using a wireless sensor network. The application consists of three components: a wireless sensor network, a middleware, and a user interface. The sensor network consists of 21 mobile nodes, 29 reference nodes,...
Underwater sensor networks (USN) are used for harsh oceanographic missions where human operation is dangerous or impossible. Localization is essential for USNs. It is required for data tagging, node tracking and position-based routing algorithms. Localization is challenging because Global Positioning System(GPS) is not available in underwater; at the same time, existing GPS-less schemes based on fixed...
The proposed architecture is structured into a secure API, a backbone, and separate device networks with standard interface to the backbone. The API decouples innovation of services and service logic from protocols and network elements. It also enables service portability between systems, i.e. a service may be allocated to end-systems or servers, with possible relocation and replication throughout...
IEEE 802.16j mobile multi-hop relay (MMR) network provides an attractive solution for the coverage extension and throughput enhancement of IEEE 802.16e network. IEEE 802.16j MMR network needs a method for finding the RS route that minimizes the latency and maximizes the network throughput. In this paper, we propose a path selection method for IEEE 802.16j MMR network. The metrics designed for the...
Fast handover protocol provides seamless handover in mobile IPv6 networks by reducing handover latency. One assumption in fast handover is that the MN (Mobile Node) or the network could know or predict the new AR (Access Router) before data transport from the previous AR to the MN is disrupted. In order to achieve this capability, the complexity of predicting the new AR and the diversity of the wireless...
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