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The Intelligent Internet of Things (I2oT) has become a significant technology in the recent research area. The application of internet of thing expands to the connectivity for anything, anytime and anyplace. It is expected that there will be 50 billion devices connected to the internet of things by 2020. This huge number of device that were connected together to establish internet of things. However,...
Radio Frequency Identification is a rapidly growing technology. Recent advances in wireless technology pave a path for integrating sensors with RFID system. The proposed tag consists of multiple resonators which are used for encoding the data. The tag can also be used for sensing applications by integrating dedicated resonator with the sensor element. Each spiral resonator is of a different length...
In this paper, an enhanced mobility manager will be presented to overcome many drawbacks of Castalia's traditional mobility manager. The presented mobility manger can deal with paths rather than lines. This will allow users to simulate nodes moving with any possibilities within the simulation space. Additionally a 3D visualization engine will be integrated so that users can visualize their simulated...
A design and analysis of a 28/38 GHz dual-band CPW slot directive antenna are presented. To obtain a dual band at 28/38 GHz that covers 5G applications, chambered rectangular patches are printed on a low permittivity “εr2=2.2” grounded substrates with a 0.254-mm-thick where it is fed by a 50Ω microstrip line on the backside through a staircase rectangular apertures etched in the ground plane. The...
A design and analysis of a proximity-fed printed slot antenna with 28/38 GHz dual band characteristics for future 5G wireless applications are presented. To obtain a dual-band at 28/38 GHz that covers 5G applications, an elliptical patch is etched non-concentrically inside a ground plane elliptical slot. The antenna is proximity-fed by a microstrip on the other side of the substrate. Results indicate...
Low power and lossy networks (LLNs) consist of devices having limited battery power, less memory, reduced processing capability. RPL (Routing Protocol for low power and Lossy networks), is an approved Internet Engineering Task Force (IETF) standard routing protocol for IPv6-based LLNs. RPL uses a proactive routing approach and the sink or controller node within the network creates a Directed Acyclic...
Routing protocol for low-power and lossy networks (RPL) is the standard IPv6 based routing protocol for low power, lossy Networks (LLNs) proposed by IETF. It is proposed for networks with characteristics like small packet size, lossy links, low bandwidth, low data rate and low power resources. RPL is a single path routing protocol and the existing objective functions do not support creation of multiple...
This paper discusses the use of PEDOT:PSS material for the implementation of two types of humidity sensor devices. The first device is a wireless humidity sensor that consists of a microstrip-fed rectangular slot antenna, loaded with one or two PEDOT:PSS blocks. The second device consists of a two port, filter, that consists of a split ring of rectangular shape, that is also loaded with a PEDOT:PSS...
Internet of Things (IoT) is becoming a reality and new and advanced applications are expected to emerge. For applications with reliability needs to work well in IoT environments, robust data transportation is required. Approaches like TCP are known for not being adequate in sensor network environments, while UDP has been included in the 6LoWPAN stack allowing low-power and limited processing devices...
Wireless Sensor Networks (WSNs) are being used everywhere around us whether it be a smart office or an application related to environmental monitoring, healthcare, surveillance, education and training. Most of the time such application domains involve handling of sensitive data that would require secure dissemination of information from sensor node to the data collection point (target node). However,...
Energy efficient spectrum sensing and data communication to extend the lifetime of cognitive radio sensor network is becoming increasingly important due to resource constraint of CR-WSN inherent from WSN. This paper presents an energy-aware clustering (EAC) algorithm that enhances spectrum sensing performance and reduces network energy consumption thereby prolonging lifetime of the network. We derived...
The main objective of this research is to design and realize a multi-robot system for real-time sensing and monitoring suitable for hazardous and/or unreachable environment. The proposed system has three mobile robots; main, rover and eye. Each mobile robot has its own embedded microcontroller and set of sensors. Wireless communications between local site and these mobile robots are achieved by WiFi,...
This work addresses the problem of energy efficient management of mobile resource distribution in Wireless Sensor Networks (WSN), subject to Quality of Service (QoS) constraints. Monitored phenomena may require an increased coverage within a particular area and we present novel methodologies for optimizing the "bargaining stage" when deciding how to select the mobile resources to be re-located...
In this paper, an efficient RF-DC Rectifier is presented. The rectifier features high efficiency levels in low input power regions, which showed better performance compared to similar works in relevant literature. This is achieved through careful design of the rectifier and optimization of several aspects that affect the rectifier operation. To provide higher voltage levels, multi stage configurations...
The main objective of this research was to design and implement a remote sensing and monitoring system running on mobile robot with obstacle avoidance capability in unreachable area. A simple mobile robot prototype with onboard sensors has been designed and implemented to scan and monitor several variables in the surrounding environment. Teleoperation of such a mobile robot is a challenging task that...
Different Medium Access Control (MAC) Protocols for Wireless Sensor Networks (WSNs) have been proposed over the last few years. IEEE 802.15.4 MAC protocol standard is designed for low-power, low-cost, and low-rate Wireless Personal Area Networks (LR-WPANs). The contention period of IEEE 802.15.4 standard consists of Contention Access Period (CAP) and Contention Free Period (CFP). CAP utilizes Carrier...
This paper presents a designing of a low voltage energy harvesting circuits for generating rectified voltage into storage devices using vibrating piezoelectric element. A technique (i.e., DC-DC Step-Down converter) has chosen for designing the low-power circuit with low voltage energy. The proposed method consumes very little power, and is especially suitable for the environments, where ambient harvested...
Nowadays, Sensor network is extensively practical in numerous fields including general engineering, agriculture and environmental monitoring, health monitoring and surgery [1]. Sensors are designed as increasingly efficient and Miniature. As a matter of fact, the most important factor in the design of RF communications is the size of the antenna [2]. In fact, Miniaturization will be subject to steady...
This paper presents a wireless remote controller in which providing a wireless sensing solution for home users to operate essential household appliances, ranging from simple lightings to sophisticated electronic devices. A wireless protocol based on wireless token ring protocol (WTRP) has been modified, yielding wireless controller area network (WCAN) data centric communications, which is then proposed...
Contention window based medium access protocols are of practical interest in low data rate wireless communication scenarios. In periodic data collection applications, nodes mostly produce small data packets that are collected by the cluster heads and routed to the base station. In this paper, a new mechanism for adaptively selecting the size of the contention window based on the number of contending...
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