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The paper deals with the problematics of the distributed control units in the outdoor training polygons which are implemented with a wireless communication unit. The work is mainly focused on the multi-hop mesh capabilities of wireless communication modes. The theoretical part contains information about wire/wireless networks, a block diagram of the training-control unit and basic fundamentals. The...
This paper considers real-time cluster-based wireless sensor networks where the nodes harvest energy from the environment. We target performance sensitive applications that have to collectively send their information to cluster head by a predefined deadline, such as in distributed real-time monitoring and detection. The nodes are equipped with Dynamic Modulation Scaling (DMS) capable wireless radios...
Water scarcity and water stress issues pose a serious threat to the global population. The traditional way of manual meter reading is furthermore inconvenient and time consuming, and it wastes resources. This method is also unable to manage the sustainable water resources effectively since it requires efficient, accurate and reliable monitoring techniques that enable the utilities sector and consumers...
Water distribution networks require long term autonomous monitoring solutions, integrated, reliable and cost effective data transfer methods. This paper investigates the data delivery infrastructure of water distribution network sensor equipment used for network monitoring and billing of the subscribers. Water distribution network usually apply sensors to measure water flow, pressure and temperature...
In the last years, the presence of WSN (Wireless Sensor Network) is spreading worldwide. The reason for this success is that they facilitate the creation of data acquisition networks minimizing the necessary wire infrastructure. However, the WSN distributed modules typically have high dependencies on their batteries consumption. In the other hand, event-based systems are spreading fastly day by day...
In wireless multihop networks, route selection plays an important role in network performance in terms of throughput capacity, as well as, energy efficiency. In general, the route selection strategy should distribute the traffic throughout the network, in order to avoid congestion. This strategy also has the side-effect of distributing the energy consumption among all nodes, so that the energy starvation...
Bell's Law predicts continual reductions in the size of computing systems. We investigate the status of the next paradigm shift that will usher in ubiquitous computing - sub-mm3 sensor nodes. However, this form factor remains beyond the capabilities of modern integrated circuit design techniques due to battery size. This paper describes new ultra-low power circuit techniques applied to digital processors,...
More than one billion people lack access to safe drinking water in the world. Providing a way to measure automatically water quality will help tackle this problem. This paper presents the design of a water quality measuring system and proposes a prototype implementation of a water quality wireless sensor network (WQWSN) as a solution to this challenging problem. When applied to developing countries,...
The development of a wireless sensor network (WSN) gateway is challenging for sites where limited infrastructures lead to frequent power shortages and and network unreliability. In this paper we presents a low-power, low-cost, 802.15.4 and 802.11 compatible solution which uses open source software to meet local conditions. Using the SunSPOT motes on a system which is mostly platform independent, our...
This paper introduces a new dynamic addressing technique for prolonging the operational duration of duty cycled wake-up radios found in wireless sensor networks. A wireless sensor network (WSN) consists of a field of spatially distributed wireless nodes which operate on minimal battery power for extremely long times. A WSN typically uses a multi-hop architecture where messages containing sensed data...
This paper presents a system prototype for portable wireless medical devices. An ASIC possessing physiological signal sensing is included. A multi-parameter communication protocol is employed to provide various functions and operation modes to satisfying different applications. LSK (load shift keying) is adopted to carry out no-battery wireless communication. The proposed design can be easily modified...
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...
Expected growth in use and implementation of wireless sensor networks (WSNs) in different environments and for different applications creates new security challenges. In WSNs, a malicious node may initiate incorrect path information, change the contents of data packets, and even hijack one or more genuine network nodes. As the network reliability completely depends on individual nodespsila presence...
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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