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In this paper we discuss the application of multiple-wireless technology to a practical context-enhanced service system called ViewNet. ViewNet develops technologies to support enhanced coordination and cooperation between operation teams in the emergency services and the police. Distributed localisation of users and mapping of environments implemented over a secure wireless network enables teams...
Wireless sensor network (WSN) has become a significant technology and Wireless (body) sensors can be deployed on patients to continually monitor their physiological health conditions. These body sensors are very tiny devices and when attached to the human patient body would eliminate the need for continuously monitoring by a nurse/doctor. The wireless body sensors can then be configured to convey...
Wireless sensor networks have become very useful in so many applications. Applications such as grape monitoring, insect movement monitoring and etc., that allows connectivity between sensor network and Internet can solve many remote control and monitoring problems. IPv6 over low power WPAN (6lowPAN) protocols are suitable technology that can be adapted in wireless sensor network. The deployment of...
The 2.4 GHz industrial, science and medical (ISM) band is a license free band allocated for a variety of consumer applications: environmental monitoring, agriculture, medical care, smart buildings, factory monitoring and automation, and numerous military applications. This project focuses on the adaptive interference avoidance scheme for IEEE 802.15.4 to allow coexistence with IEEE 802.11b/g in the...
A sensor network consisting of sensors for slope deformation and soil-water content was designed, developed, and evaluated in a miniature slope model. The sensor network is buried vertically underground, and is composed of pipe segments to form a column. Each segment contains a tri-axial accelerometer for tilt measurements and capacitive-type sensors for soil moisture measurement. Measurements taken...
Information exchange in a microgrid is vital for monitoring and control purposes. Before any monitoring and control algorithms can be applied to a microgrid system, a suitable, cost-effective and reliable communication network has to be built for information transfer to and from all distributed energy resources and other control devices. To set up a relatively easy-installation communication network...
The traditional task of a sensor network is data collection and aggregation for further processing. In the case of mobile networks this is usually done via wireless technologies. However, with the establishment of mobility another problem occurs: The question of the actual location of the measured data. This paper proposes a localisation scheme for Wireless LAN, where an existing WLAN infrastructure...
IEEE 802.15.4 standard is uniquely designed for low data rate wireless personal area networks (LR-WPANs). The IEEE 802.15.4 targets the applications such as industrial, agricultural, vehicular, residential, medical sensors and actuators which have more relaxed throughput requirements. ZigBee is a wireless technology based on IEEE 802.15.4. ZigBee routing uses ad hoc on-demand distance vector (AODV)...
The WLAN is a set of hardware, firmware and software tools that allow to measure and collect certain parameters over relatively large area. By parameters we mean any physical value convertible into electrical counterpart. For instance: air temperature, relative humidity, soil moisture, leaf wetness, wind speed and direction, the water level in a river or a tank, etc. All these values can be converted...
Issues about reliable applications of wireless sensor networks (WSN) are discussed and actuality is reviewed. A prototype of WSN integrated into industrial process control system is proposed. Based on it, the communication architecture of individual node is brought forward, and the network layers are detailed expounded. Collective reliability of nodes and the wireless industrial environment are studied...
We have designed and tested a comprehensive wireless neural recording system. The system amplifies, digitally encodes, transmits, archives, hosts, and displays multiple channels of neural recordings from any number of un-tethered test subjects. The neural transmitter and receiver are modified TinyOS-based MICAz wireless sensor nodes that can sample, transmit, and receive neural data real-time at a...
In this paper, we present dynamic rekeying with key hopping (DRKH) encryption protocol that uses RC4 encryption technique to ensure a strong security level with the advantage of low execution cost compared to other IEEE 802.11 security schemes. Low computational complexity makes DRKH suitable for solar- and battery-powered handheld devices such as nodes in Solar ESS (extended service set) and wireless...
The following topics were dealt with: local computer networks; peer-to-peer; QoS; wireless sensor networks; radio networks; storage; distribution; traffic characterisation; network routing; optical networks; services; traffic control; power efficiency; wireless local area networks; network security; ad hoc networks; multicast networks; network management; DiffServ; mobile networks; resource allocation;...
Wireless sensor networks are emerging as a popular research issue and tool for many applications. However, nodes in a sensor network are severely constrained by energy, storage capacity and computing power. In this paper, we propose an integrated network environment (sensor and ad hoc network) with IEEE 802.15.4a, ultra-wideband (UWB) and two-tier data dissemination (TTDD) routing protocol. We wish...
One of the most important issues in sensor enabled emergency applications is the QoS provisioning. Wireless LANs plays critical role in providing anywhere and anytime connectivity for many sensor enabled emergency applications. This paper addresses the issue of provisioning QoS over the wireless channel between the sensor enabled emergency application and the wireless access points (e.g., wireless...
Virtual infrastructures or backbones in wireless sensor networks reduce the communication overhead and energy consumption. In this paper, we present backbone routing (BBR), a novel fully distributed protocol for construction and rotation of backbone networks. BBR reduces energy consumption without significantly diminishing the capacity or connectivity of the network. Another key feature of BBR is...
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