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In this work, we design an efficient Monte Carlo scheme for a node-specific inference problem where a vector of global parameters and multiple vectors of local parameters are involved. This scenario often appears in inference problems over heterogeneous wireless sensor networks where each node performs observations dependent on a vector of global parameters as well as a vector of local parameters...
Generally in practice there are Optical Fiber, Waveguides, Satellite Communication, Coaxial Cable and copper Wire which are utilized by the heterogeneous and homogeneous networks to offer wider range of data and voice communication to the end users. In future as the demands for bandwidth increases for the purpose of communication, this results into imbalance of the traffic load. To provide addition...
This live demonstration shows ultra-low bandwidth video streaming based on a scene-driven event-encoding imaging sensor. The approach exploits the inherent focal-plane redundancy suppression / video compression achieved by an array of autonomous, auto-sampling pixels. The data readout from the camera is optimized for transmission bandwidth using variable bit-length pixel address encoding and spatio-temporal...
An analog-to-information converter (AIC) enables information quantization instead of signal quantization, which can reduce both quantization efforts and data bandwidth. Therefore, an AIC will relax data processing and transmission burden and improve overall power efficiency, making it attractive for wireless vision sensor networks. In this paper, we propose a background subtraction based column-parallel...
Near Field Communication (NFC) readers, ubiquitously embedded in smart-phones, buses and other infrastructures, are able to wirelessly deliver mW-level power to ultra-low power, passive NFC tags via a coupled magnetic field. Additionally, an NFC reader can leverage the coupled communication channel to support relatively heavy computational applications, such as sensing, visual displays, etc. Consequently,...
In a wireless sensor network with high density of nodes, for finding short routes to the sensor nodes satisfying the route request query committed by any sensor node while keeping the route discovery traffic to a low level, a query-driven routing algorithm called Serried Forwarder Routing (SFR) is proposed. SFR introduces a kind of quasi-unicasting mechanism for reducing the unnecessary route discovery...
Wireless sensor networks (WSNs) are susceptible to most security attacks. There are some limitations such as reliability, energy efficiency, and scalability, which affect sensor nodes. These limitations mostly affect the security of wireless networks. Also, limited capacity of sensor nodes accounts for the security attacks on WSNs. Applications such as military surveillance, traffic surveillance,...
In this paper, we present a millimeter wave system that combines several innovations to enable practical use of the yet unharnessed capacity of the millimeter spectrum for high speed and secure wireless connectivity. Essential to its realization is a novel ultra-wideband array that incorporates suitable balanced feeds. Also, unique bandwidth reconfiguration technique is presented via simple tuning...
The Amazon Rainforest degradation is a worldwide concern. The rainforest has been endangered by the illegal wood extraction without control even in the preservation areas. Due to the large geography extension prevent these crimes with an unmanned aerial vehicle (UAV) is not always possible. The Wireless Acoustics Sensor Network (WASNs) technology can alleviate this problem. Here, we present an acoustical...
The 2.4 GHz ISM band is crowded with a wide variety of wireless devices operating under various protocols. For many reasons, medical device manufacturers are increasingly incorporating wireless technologies into their devices, many of which operate in the ISM band. Monitoring and characterizing wireless spectrum utilization is vital to better plan wireless network deployments and to assess the risk...
A cognitive radio system coexisting with various systems must perform a spectrum sensing for finding a white space (WS). In this paper, we propose a new two-stage spectrum sensing method using an energy detection (ED) based on fast Fourier transform (FFT). In the case that an unknown signal is present the FFT band, false signals are detected in the surrounding FFT bins of the received signal due to...
The 2.4 GHz ISM band is crowded with a wide variety of wireless devices operating under various protocols. For many reasons, medical device manufacturers are increasingly incorporating wireless technologies into their devices, many of which operate in the ISM band. Monitoring and characterizing wireless spectrum utilization is vital to better plan wireless network deployments and to assess the risk...
A cognitive radio system coexisting with various systems must perform a spectrum sensing for finding a white space (WS). In this paper, we propose a new two-stage spectrum sensing method using an energy detection (ED) based on fast Fourier transform (FFT). In the case that an unknown signal is present the FFT band, false signals are detected in the surrounding FFT bins of the received signal due to...
In practical underwater wireless optical communications (UWOC), pulse modulation technique has been widely used due to the high optical power efficiency and relatively low system complexity. Compared with the simplest on-off keying (OOK) scheme, digital pulse interval modulation (DPIM) improves both power efficiency and error performance and requires no symbol synchronization. Polarization shift keying...
This paper highlights the benefits of IEEE 802.15.4's unslotted carrier sense multiple access collision avoidance (CSMA-CA) MAC layer acknowledgements (ACKs) in ad-hoc wireless networks. We performed different experimental studies to analyse the impact of enabling and disabling the ACKs on event detection ratio (EDR), available bandwidth estimator, and flow admission control algorithms. Comparison...
Wireless Sensor Networks (WSNs) technologies have been successfully applied to a great variety of outdoor scenarios but, in practical terms, little effort has been applied for indoor environments, and even less in the field of industrial applications. This paper work presents an intelligent hybrid WSN application for an indoor and industrial scenario, with the aim of improving and increasing the levels...
In recent times Internet of Things (IoT) has gained popularity because of its characteristics in connecting and providing communication among various physical objects and devices enabling collection of diverse data that help making smart and educated decisions which in turn help making human life simple, safe and efficient. Traditional Wireless Sensor Networks (WSNs) are now becoming mainstream data...
The wireless sensor networks are highly dynamic in nature and their storage, processing and energy resources are limited. For these conditions routing protocols are required to maintain the network with reliable and secure communication. Lot of protocols are designed for routing but none of the protocol is proposed security as a main task. We advocate that Software Defined Network (SDN) enabled SPIN...
In this paper, a method for node localization in a novel small world - wireless sensor network (SW-WSN) is proposed. A SW-WSN is created by introducing small world characteristics into a conventional wireless sensor network (WSN). Introduction of long-ranged links between selected nodes in a WSN reduces average path length (APL) of the network without affecting the clustering coefficient (CC) significantly...
Video surveillance deployed over a flexible Wireless Ad-hoc NETwork (WANET) is gaining popularity in building and home environments. Energy-efficient multicasting is an important issue in surveillance, since camera sensors are always equipped with limited energy capacities. Many works have considered the problem of maximizing the multicast lifetime by assigning the transmission range of nodes. However,...
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