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As a step toward sustainable wireless sensing, we present a proof of concept system that uses a Plant Microbial Fuel Cells (PMFC) as a power source. To match the very low power production capabilities of the PMFC, we couple it with an ultra-low power wake-up receiver used as a trigger for sampling and transmission of the sensed value. We demonstrate that this combination, with a new, receiver initiated...
The problem of coverage in three-dimensional (3D) wireless sensor networks is challenging and hard. In this paper, we focus on the problem of k-coverage of a 3D field of interest (FoI), where every point is covered by at least k sensors. First, we propose three sensor placement strategies to guarantee k-coverage of a 3D FoI. Second, we compute the corresponding sensor density. Third, we investigate...
We consider the scheduling problem for Aggregated ConvergeCast in wireless sensor networks with a physical interference model. Previous work consists of either heuristics without performance guarantees, or approximation algorithms which do not perform well in practice. We propose here a first scalable mathematical SINR (Signal to Interference plus Noise Ratio) model that outputs an optimal Aggregated...
This paper presents the ongoing work of applying the project-based learning approach to teaching IoT technologies in an advanced embedded networking course, which is offered to electrical and computer engineering students. The emphasis of this course is on teaching the prominent wireless networking technologies IEEE 802.11 (WiFi) for the IoT and the development of the IoT applications. Microcontrollers...
State of the art technologies in micro- and nano-electromechanical systems (MEMS and NEMS) devices have been proposed to address important issues in renewable energies, health sciences, consumer electronics, and information technology. Incorporation of MEMS / NEMS interfaces when creating a system on chip (SOC) utilizes knowledge of nanotechnology materials and devices, which is delivered as part...
Vehicular crowd sensing (VCS) is an emerging data collection paradigm in smart cities, where vehicles are incentivized to perform complex urban sensing tasks. Original VCS is difficult in supporting large-scale and fine-grained urban data collection. In this paper, we propose a hybrid VCS paradigm, where VCS network and wireless sensor network (WSN) cooperate to provide urban data collection service...
Recently, the security issues of CPS have attracted much attention from many researchers. Standing on the point of attacker, this work investigates the optimal channel jamming attack against wireless state estimation in CPS with energy constraint. Specifically, we consider that the attacker can jam the wireless channel with various power levels that will cause different sensory packet drop probabilities...
A nodes scheduling method applying for high density and large-scale WSN is put forward by using probabilistic coverage sensing model in this paper-that is the Distributed Probabilistic Coverage Sets Configuration Method (DPCS). In this method, the nodes with dense distribution are divided into several non-overlapping coverage sets by adopting distributed self-organization method. In the process of...
Aiming at the problem of sensor node deployment in underwater wireless sensor networks(UWSNs), the doublecoverage algorithm is proposed to solve the premature failure caused by excessive energy consumption. First of all, the coverage area of node is divided into grid around the mobile sensor network with AUV. Then the sensor node is analyzed to design the sensor node sensing model and the sensor node...
Energy autonomy is a crucial bottleneck for consumer electronics and low-cost devices that are a pillar for the Internet of Things era. In this work, we present a self-sustainable sensor device that drives an e-paper digital display powered by the energy produced by colonies of electrogenic bacteria in symbiosis with plants. The power management subsystem has been designed to meet the requirements...
This work discusses the concurrent applications of data collection and reconfiguration, and proposes a novel reconfiguration scheme during data collection. The proposed scheme incorporates the advantages of both proactive and reactive protocols into one system: using proactive protocol to collect continuous data and reactive protocol to reconfigure each remote node of the network. In addition, three...
Unattended Wireless Sensor Networks (UWSN) are usually deployed in human-hostile environments. Such architectures raise a challenge to data protection for two main reasons. First, sensors have limited capacities in terms of performance and memory, so not all cryptographic mechanisms can be applied. Moreover, the measurements cannot be immediately gathered, so they have to be kept inside the devices...
This paper describes the system concept and initial results for end-to-end energy-autonomous sensor systems using unmanned aerial vehicles (drones) as agents for power delivery to and data gathering from sensing devices. Such systems may be particularly useful for delay tolerant monitoring scenarios, where sensing devices may be deployed in remote, harsh conditions, often with sparse connectivity,...
This article presents the design of a telecommunications network that allows the monitoring of mud, earth, rock and debris flows produced by slope overflows in the main arterial roads of the city of Cuenca, Province of Azuay. This network is integrated in a system of monitoring of the SIS ECU 911 of the City of Cuenca. The system has been conceived as a set of devices such as wireless modules and...
Radio-on-demand wireless sensor networks (WSN) are expected to be expanded the lifetime of sensor nodes because the receiver effectively utilizes the sleep/wake-up control function. The multi-carrier code division multiple access (MC-CDMA) using modified pseudo orthogonal M-sequence sets (MPOMS) codes have been proposed for radio-on-demand WSN systems. In this paper, the rigorous communication success...
Wireless communication systems can be used to support a lot of industrial applications and much effort has been done to design solutions for this scenario. Actually, an important issue when designing such solutions is the performance evaluation, which requires proper resources for accurate results. This paper then proposes an experimental platform where the devices communicate via wireless and wire...
In this paper, a miniaturized quarter-wavelength rectangular patch antenna with coaxial feed is proposed. The resonance frequency of the proposed antenna is simulated and measured so that the relationship between its mechanical deformation and resonance frequency can be determined. Also, additional tensile tests are employed to further clarify the relationship by increasing strain increments per loading...
Wireless sensor networks query processing is useful for sensing systems, such as environmental monitoring. Innetworks query processing is attracted by researchers to develop user-friendly sensing systems. Due to the sensors considered as a limited resource and battery powered devices, more robust features are recommended to limit the communication access to the sensor nodes for maximizing the sensor...
Internet-of-things (IoT) paradigm exploits the Distributed Measurement System (DMS) to execute measurements. Each node of the DMS has computational and communicative capabilities, and can be equipped by sensors and measurement instruments. Therefore, it can be assumed as Smart Object (SO). The availability of mobile SO (MSO) (cars, smartphones, drones) is taken into consideration in the research to...
The general structure and main principles of creating a multi-version post-severe NPP accident monitoring system, which consists of one wired and three drone-based wireless network subsystems, are proposed. Reliability block diagrams for the system are built. On the basis of the reliability block diagrams, reliability models of the system are developed. The dependence on probability of failure-free...
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