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This paper describes the design of the automated data measuring system of technical electric energy metering based on a network of autonomous wireless current sensors. The detailed information of the energy consumption of the technical object read from the proposed sensors and processed with the information part enables taking justified decisions on energy saving. The hardware of the measuring system...
This paper presents an energy efficient power amplifier module suitable for integration in a wireless Internet of Things (IoT) node. The proposed power amplifier (PA) offers a gain of 13.8 dB, while the Power Added Efficiency (PAE) of 71.7 % is achieved along with high output power of 38.8 dBm. The matching networks are designed using RF35 Taconic substrate with dielectric constant of 3.5. Moreover,...
Existing wireless sensor network are developing rapidly and soon will occupy a dominant place among the data collection and communication. The remote location of the sensors and automatic operation increases their vulnerability to outside intrusions and attacks. Because of out of constant sensor supply the providing of authentication is quite challenging whereas the best protocols is negotiated sensor...
Nowadays, wireless sensor networks attract researchers because of their popular applications in the military, communications, intelligence and medical aspects of vitality. Wireless networks can provide solutions to a lot of major problems in the world as they are low-cost, limited energy services, and there must be mechanisms to raise the efficiency of energy consumption to ensure a long lifetime...
Wireless sensor network is a set of independent transducers with communication infrastructure for recording and monitoring at different locations. The monitoring parameters are energy, temperature, humidity, pressure, direction and speed of the node in the WSN. The main challenges of WSN are efficiency, scalability, heterogeneity, reliability, robustness, privacy and security. Many researchers are...
The Internet of Things (IoT) consists of all kinds of sensors which collect much information. The privacy and anonymity in IoT is fundamental to the system and must be resolved. Sima proposed a protocol about lightweight authentication and key agreement and claimed to be secure and robust against all existing methods of attack. In this paper, the author points out the vulnerability of Sima's protocol...
We present a showcase of our SDN-inspired facility for the Internet of Things (IoT) — the CORAL (Cross-Layer Control of Data Flows) infrastructure. CORAL provides a hierarchy of network controllers that monitor network behaviour and adapts network protocol parameters on demand. It is built on top of rich network control abstractions and is hardware-independent. Our facility offloads protocol functionality...
Wireless Sensor Networks (WSNs) require accurate and energy-efficient clock synchronization for data fusion and other tasks. Clock frequency synchronization, also known as clock syntonization, aims to eliminate the frequency differences among nodes resulted from inherent inaccuracy of clocks. A protocol for syntonization of wireless sensor nodes is introduced in this demo. It is demonstrated that...
Even in the 21st century human is still handicapped with natural disaster. Flood is one of the most catastrophic natural disasters. Early warnings help people to take necessary steps to save human lives and properties. Sensors can be used to provide more accurate early warnings due to possibilities of capturing more detail data of surrounding nature. Recent advantages in protocol standardization and...
Wireless Sensor Networks (WSNs) allow applications to interact with the physical world using nodes in an Internet of Things (IoT). Application level protocols such as the Constrained Application Protocol (CoAP) and data models such as IPSO Smart Objects and the Open Mobile Alliance Lightweight Specification (OMA LWM2M) have the potential to provide greater application interoperability and to ease...
Classical control and management plane for computer networks is addressing individual parameters of protocol layers within an individual wireless network device. We argue that this is not sufficient in phase of increasing deployment of highly re-configurable systems, as well as heterogeneous wireless devices co-existing in the same radio spectrum. They demand harmonized, frequently even coordinated...
Nowadays, industrial networks are characterized by complex architectures of hybrid, wired and wireless segments, combining automation and information technology (IT). Their operation is supported by network management facilities. Network monitoring is a basis for management as it provides the necessary status information. This paper presents an approach to apply a monitoring concept coming from the...
As wind energy continues to expand to new frontiers in terms of the location, number, and size of wind turbines, the industry has begun to seek smarter operations and management solutions. Wireless sensing nodes could provide a low-cost platform to support a variety of applications designed to reduce the levelized cost of energy and increase the safety of wind turbines. However, a wireless sensor...
In this note, we propose a communication scheduling algorithm for wireless network control systems by utilizing the idea of the compressed sensing technique. The proposed scheduling algorithm aims at reducing the data traffic in a networked control system, at the price of a (typically, acceptable) control performance deterioration. To this end, we combine it with the event-triggered qualification...
A Wireless Sensor Network consists of enormous amount of sensor nodes. These sensor nodes sense the information from the sensing region and transmit to the sink. From the sink a client can access the required information. Essential part of the wireless sensor network is the sensor nodes that are driven with the batteries. Prolonging the network lifetime is very difficult and expensive in many conditions...
The IoT devices to be provisioned need to obtain a network secret and then use this secret to connect to a wireless network. In existing solutions, a network secret is sent in clear text or encrypted by certain methods such as AES from the configurator. In this paper, a new simplified lattice based encryption method is proposed to protect the network secret during the provisioning. In addition, when...
Environment monitoring is key for multiple applications and requires that devices used in acquiring environment data to be scattered over a wide area, but at the same time maintain accessibility of information from all sensor nodes. Although many Wireless Sensor Networks are based on the IEEE 802.15.4 standard for low-power, Wi-Fi networks offer the most accessibility and interoperability with other...
In this paper, we present a new distributed protocol to achieve the synchronization of time variations and initial times simultaneously. The protocol combines the design methods of controller and estimator to obtain more precise synchronization with higher robustness against noisy inputs mainly generated by crystal oscillators of clocks. Furthermore, the control input is ensured bounded while achieving...
The underwater wireless remote sensors convey messages in a range, where there is no possible human intervention. It is difficult to replace the battery in order to sustain energy in an acoustic environment. Moreover, considering the environment, solar energy cannot be used to recharge for batteries. These sensors are required to be awake for an extended period, taking in consideration that they have...
We present the design of a suite of protocols for wireless sensor networks (WSNs) with respect to a complete life cycle of a WSN node from warehouse to the end of operation. While there are numerous publications on various, usually isolated, aspects of WSNs, the whole life cycle of a node from registration in an automation system via warehouse, calibration, mounting, performing measurements to finally...
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