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In this paper, we present a system using an Android smartphone that collects, displays sensor data on the screen and streams to the central server simultaneously. Bluetooth and wireless Internet connections are used for data transmissions among the devices. Also, using Near Field Communication (NFC) technology, we have constructed a more efficient and convenient mechanism to achieve an automatic Bluetooth...
Wireless Sensor Network will be the lone contender of technologies for Urban environment monitoring in cities enabling us to gather large real time data, process all sort of data with good time and spatial resolution. This paper discusses the case study of Bangalore Urban City and proposes a conceptual framework for the deployment of WSN for environment monitoring. It presents the environmental challenges...
Vehicular ad hoc networks (VANETs), which are a class of Mobile ad hoc networks, have recently been developed as a standard means of communication among moving vehicles. Congestion is one of the key issues which can restrict the Network performance, and it is no exception for VANETs. Congestion control mechanisms include three phases: congestion detection, congestion notification and rate adjustment...
The recent research and development in the domain of Wireless Sensor Networks (WSNs) have opened up tremendous opportunities and applications in many different scenarios. If we take into account the aftermaths of disaster, we certainly need to build up a mechanism to gather the data for the disaster hit area in which there is minimum delay and protocol we use should be energy efficient. This can be...
In a Wireless Sensor Network (WSN) the provision of a Guaranteed Time Slot (GTS) in a beacon enabled mode is best suited for applications with low latency and high Quality of Service (QoS) requirements such as those of real time traffic. However the advancements in technology have dramatically increased the volume of applications which require access to this real time service provision in such areas...
In this paper we have proposed and designed Finding HuMo (Finding Human Motion), a real-time user tracking system for Smart Environments. Finding HuMo can perform device-free tracking of multiple (unknown and variable number of) users in the Hallway Environments, just from non-invasive and anonymous (not user specific) binary motion sensor data stream. The significance of our designed system are as...
In hierarchical networks, nodes are separated to play different roles such as CHs and cluster members. Each CH collects data from the cluster members within its cluster, aggregates the data and then transmits the data to the sink. Each algorithm that is used for packet routing in quality of service (QoS) based applications should be able to establish a tradeoffs between end to end delay parameter...
As the Wireless sensor networks (WSN) develops; people have made a lot of research on Node localization principle. The Real time positioning system which is based on WSN has developed a lot too. It has not only great use value and prospect but also challenges the exploiting of it. This essay aims at designing a kind of Real time positioning system with the voice communication function and guaranteeing...
One of the motivations for use of wireless sensor networks (WSNs) in industrial environments is related to the reduced deployment and maintenance costs, when compared to the use of wired networks for connecting single I/O points. Nevertheless, a well-known problem for the use of wireless communication in industrial environments is related to the unreliable nature of the communication medium. Therefore,...
We demonstrate a real-time moving object localization and extraction system. The system consists of a 256 × 256 CMOS image sensor and an Opal-Kelly FPGA board. Frame differencing is utilized for motion detection; a stream of binary motion events are generated and further fed to a clustering-based object localization unit, where each event is processed on the fly. At the end of one frame, the moving...
As the technology of multimedia applications in Wireless Sensor Networks (WSNs) is highly desired nowadays, how to guarantee real-time service becomes one of the biggest research challenges in this area. Even though lots of related works have been conducted to meet this requirement in several ways, the specific traffic model for multimedia applications has not been taken yet. It makes these new approaches...
With the advent of industrial standards such as Wireless Hart, process industries are now gravitating towards wireless control systems. Due to limited bandwidth in a wireless network shared by multiple control loops, it is critical to optimize the overall control performance. In this paper, we address the scheduling-control co-design problem of determining the optimal sampling rates of feedback control...
Time synchronization is crucial to Wireless Sensor Networks (WSNs) due to the requirement of coordination between sensor nodes. Existing secure time synchronization protocols of WSNs introduce high overhead when used for global time synchronization. In this paper, we propose a lightweight secure global time synchronization protocol for WSNs. In the proposed protocol, a broadcast synchronization packet...
The real-time data dissemination schemes exploit the spatiotemporal communication approach which forwards data at the delivery speed calculated with the desired time deadline and the end-to-end distance in wireless sensor networks (WSNs). However, the schemes do not focus on the reliable communication. Recently, MMSPEED is a well-known scheme for both reliable and real-time data delivery based on...
With the goal of accomplish the ubiquitous intelligence in social life, Cyber-Physical Systems (CPS) are getting growing attentions of researchers and engineers. However, the complexity of computing and physical dynamics bring a lot of challenges in the development of CPS, such as integration of heterogeneous physical devices, system verification, security assurance, and so on. A general or unified...
We live in an era where billions of computers are interconnected. In the very near future, not only computers but also many different digital devices and other physical objects will be seamlessly connected to each other and be able to communicate with little or no human intervention. These interconnected objects are called smart devices, and this concept is called Internet of Things. In this paper,...
Existing applications leveraging on Wireless Body Area Network (WBAN) technologies face several technical challenges and difficulties to support desirable data reliability and real-time performance visualization. So we designed and developed a testbed with integrated hardware and software solution aiming to enhance data reliability and provide performance visualization of WBAN. In this demo, we showcase...
Wireless Sensor Networks (WSN) are networks composed of autonomous devices manufactured to solve a specific problem, with limited computational capabilities and resource-constrained (e.g. limited battery). WSN are used to monitor physical or environmental conditions within an area (e.g. temperature, humidity). The popularity of the WSN is growing, precisely due to the wide range of sensors available...
This paper introduces a data collection system that uses wireless communication components PIC16F877 and GPRS to transfer and capture the data remotely. The key data collection terminal is insisted by a micro controller named PIC16F877 which is responsible for controlling several parts such as LED screen, MC39i working in GPRS as well as various data operating modules. MC39i is responsible for sending...
In wireless sensor networks (WSNs), the real-time data dissemination protocols exploit the spatiotemporal communication approach which forwards data at the delivery speed calculated with the desired time deadline and the end-to-end distance. However, the protocols do not focus on the reliable communication. Recently, MMSPEED is proposed for both reliable and real-time data delivery based on multipath...
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