Range Wireless Communication Technology Research Articles

Construction of Jujube Quality and Safety Traceability System Based on Close Range Wireless Communication Technology

The quality and safety of jujube fruit is the key to ensuring the healthy development of the industry. Currently, there are problems such as unreasonable use of chemical fertilizers and pesticides in the traditional cultivation and management mode of the jujube industry. This article summarizes the construction of jujube quality and safety traceability system based on close range wireless communication technology. The system collects data on the use of pesticides, fertilizers, herbicides, and hormones during jujube production, processing, and circulation through NFC, and determines traceability information through the combination of hazard analysis of hazardous substances and key control points. It has developed a flexible mechanism and method for quality and safety traceability of tropical fruits and vegetables agricultural products, meeting the flexible management and configuration of traceability content, templates, and mechanisms, Realize the convenience of promoting the agricultural product traceability platform, and build an agricultural product quality and safety traceability management system according to the management needs of Hainan Agricultural Hi-Tech Zone, realizing functions such as enterprise settlement, product testing, and traceability information collection. Provide the application of the agricultural product quality and safety traceability system for enterprises settled in the agricultural Hi-Tech Zone, improving the settlement management level, and ensuring the reliability and traceability of agricultural product safety.

Development Strategy of Intelligent Digital Library without Human Service in the Era of "Internet +".

Internet technology has a great impact on the application and development of libraries. In order to provide users with more convenient and efficient services, this paper puts forward the development strategy of unmanned intelligent digital libraries in the era of “Internet +.” Design by IntelliSense module, network transmission module, data storage and analysis module, and intelligent service module of no wisdom digital library service mode, IntelliSense module using RFID technology, close range wireless communication technology, and other Internet technologies to collect the wisdom of unmanned services of all kinds of information in the digital library; use network transmission module of the wireless LAN network, Internet technology such as RFID network to transmit information collected to store in a data storage and analysis module; and at the same time using k-means clustering algorithm in data mining techniques such as analysis of collected data, based on the analysis results provide users with intelligence services such as search, wisdom is recommended. The experimental results show that the developed strategy meets the expected functional requirements, can accurately perceive the location of data, and effectively realize the intelligent service function.

Design of tobacco storage environment monitoring system based on Lora technology

Lora (Long Range) wireless communication technology is unique in IoT communication solutions with its advantages of low power consumption and wide coverage. In the process of cigarette production, the storage environment during storage will affect the quality of tobacco leaves, and the tobacco leaves themselves will cause greater attenuation during signal transmission. By analyzing the storage environment of tobacco leaves, this paper proposes a wireless real-time environmental monitoring system based on Lora communication technology, including data collection nodes, Lora gateways, etc., and introduces their functions in detail. Finally, the feasibility is verified by testing.

Man-in-the-Middle Attack on Contactless Payment over NFC Communications: Design, Implementation, Experiments and Detection

A recent development emanating from RFID technology is Near Field Communication (NFC). Basically, NFC is a popular short range (<10 cm) wireless communication technology with applications in areas sensitive to security and privacy concerns such as contactless payment. Since NFC communications require very close proximity between two communicating devices (e.g., a smartcard and a terminal), it is generally believed that Man-in-the-Middle (MITM) attacks are practically infeasible here. Contrasting this belief, in this paper, we successfully establish MITM attack in NFC communications between a passive tag and an active terminal. We carefully present physical fundamentals of the attack, our engineering design, and results of successful attack implementation. Subsequently, we present the practical applicability of our MITM attack that exploits a potential vulnerability in EMV based contactless payment protocol, which arises due to separation between card authentication and transaction authorization phases. We demonstrate how an attacker can compromise the integrity of a contactless payment using a malicious MITM card, and also present multiple attack/victim scenarios to analyze different types of impacts of our attack. Further, we conduct rigorous experimental studies to analyze both hardware and practical ramifications of our attack. Finally, we propose a mechanism to detect the MITM attack based on experimental analysis that demands no additional hardware.

ANIMAL HEALTH MONITORING WITH MISSING AND THEFT PREVENTION DEVICE USING WIRELESS SENSOR NETWORK AND INTERNET OF THINGS

A device to know the health status of all the animals in a farm along with its missing and theft prevention is proposed in this article. The necessary sensors to sense the health information of animals and the short range wireless communication technology and internet to communicate with the owner of the farm, are planned to use in the devices. This system will be very helpful to diagnose the health condition of all the animals simultaneously and to improve it. The system can prevent the animals from missing or theft. A mobile application which acts as a user interface provides the owner with useful information such as animal’s body temperature, heart rate, rumination and their presence inside the farm. The prototype of this idea is developed and is included for testing. Since the animal health status can be monitored from anywhere in world using a mobile application, the device will ease the work of farm owner and the laborers.

Examination and Design of Bi-Phase Encoder for Short Range Wireless Communication

In today’s digital era, Communication systems have become ubiquitous in our everyday life. In data communication various protocols are employed to encode information bits in short range wireless communication technologies. Different types of baseband encoding schemes have been in practice for improving performance of communication which comprises of Manchester, differential Manchester and FMO codes.The transmitted signal is predicted to have zero mean for vigor issue and this is also called as dc balance. The design has been tested in Tanner EDA Tool using different logics such as CMOS logic, Pass Transistor logic and transmission gate logic.

Research on location algorithm of dangerous gas source in chemical industry park based on zigbee

With the development of people's society, the chemical industry has made great progress. In the industrial structure of developed countries, the chemical industry occupies a very large proportion. At the same time, chemical production is also the weakest link in the field of safety production. Hazardous gas is the most dangerous product in the process of chemical production, which means that it is necessary to monitor and locate the dangerous gas source in real time. In recent years, with the development of wireless communication technology, wireless sensor networks (WSN) have been applied in various fields. As a short- range wireless communication technology, ZigBee is widely used in military, environmental and industrial fields because of its low cost, low power consumption and multi-function. Gas source location is a method to predict the location of gas leak points by combining gas concentration detection and gas diffusion models, can help us to warn of the leakage of dangerous gas. According to the actual demand, this paper presents a gas source location algorithm based on the ZigBee communication mode. First of all, this paper gives a brief introduction to the composition and structure of ZigBee network. Secondly, the plume model based on turbulence is discussed in detail. Thirdly, aiming at the problem of large computational complexity of traditional model, an improved particle swarm algorithm for gas source location is proposed by combining force-directed algorithm. Finally, simulation experiments show that the improved gas source localization algorithm has better results.

Evaluation of fingerprinting-based WiFi indoor localization coexisted with Bluetooth

WiFi and Bluetooth are two most commonly used short range wireless communication technologies. Recent years, with increasing number of WiFi and Bluetooth mobile terminals, tags, and other devices, a demand for integration and coexistence of these two technologies including their positioning function is booming. In this paper, we firstly investigate the interferences between WiFi and Bluetooth signals from the signal and protocol perspectives. Secondly, the principle of fingerprinting approach for WiFi positioning is introduced. In order to evaluate the performance of WiFi fingerprinting coexisted with Bluetooth, both occurrence-based and Weibull-based approaches are utilized for generating the database. Field tests present the interference in the WiFi and Bluetooth coexistence environments. A WiFi mobile device with a Bluetooth device nearby obtains poor positioning results due to the interference. Weibull-based database has more robust performance than occurrence-based database in the coexistence environments.

Wireless Body Area Network: An Overview and Various Applications

Over the past years a booming interest is comprehended in the field of wireless communication for the development of a monitoring system to observe human vital organs activities remotely. Wireless Body Area Network (WBAN) is such network that provides a continuous monitoring over or inside human body for a long period and can support transmission of real time traffic such as data, voice, video to observe the status of vital organs functionalities. In this paper an overview of WBAN technology and its requirements has been narrated. The aim of this paper was to offer a suitable and appropriate wireless technology for deploying WBAN. Several suitable short range wireless communication technologies that can be adopted in WBAN have also been discussed. Finally numerous applications in the field of medical and non-medical sectors using WBAN technology have been outlined.

The Trend of an Embedded Undersized Range Wireless Communication Technologies

trend of the up-to-date wireless technologies and embedded systems give the impression ordained to construct an outsized with enduring brunt and changes in our lives. It above all has been far and wide brought into play in the past and up to date expansions and growth in such technology endow with a new-fangled strait for realization of these systems with a great remote access. Currently, we do have a lot of wireless technologies with their individual distinct and nuisance. In view of that fact as embedded systems is application specific, for such reason it wont be suitable for other. Here in this article we have detailed such numerous restricted ranges wireless technologies.

Performance of short and long range wireless communication technologies in construction

Abstract The ever increasing complexity of construction projects asks for improved communication and automated data collection supported by continually improving electronic tools. Advances in information technologies enable us to link critical resources on construction sites, such as trucks and cranes, to the project website creating many opportunities to drastically improve productivity, safety and quality. While the use of electronic equipment is nothing new in construction, no model exists to integrate them into one unified framework. This paper presents a wireless site-network concept consisting of information hubs enabled to automatically connect data sinks with sources supported by software agents. Included in this paper is the discussion of a mobile information hub, the eCKiosk, enabled to connect the work crew electronically to the project network while collecting automatically live “as-built” data. It begins with a review of long range wireless as the basis for designing a robust Agile Site Communication Network (ASCNet). Site experiments with short range wireless conduits and embedded RFID tags showed that they are able to provide information far beyond an identification number. While wireless technologies are poised to open totally new avenues to manage construction, more field-tests are needed to establish a solid knowledge base to create a pervasive network for the dynamically changing building site.

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A Survey on Near Field Communication (NFC) Technology

Near Field Communication (NFC) as a promising short range wireless communication technology facilitates mobile phone usage of billions of people throughout the world that offers diverse services ra...

A Role-Based Service Level NFC Ecosystem Model

Near Field Communication (NFC) is a short range wireless communication technology allowing to communicate mobile devices within close proximity. It provides opportunity for service providers to offer various value added services to customers. NFC technology allows the usage of wide range of applications and eliminates the obligation to carry additional components other than the mobile device such as credit or payment cards, tickets, identification cards or keys. Despite its technological advantages over alternative ones, the NFC business ecosystems and services are yet to take off. The problems mainly arise with the business issues triggered by different and mostly conflicting needs of many actors in the ecosystem and several additional technical issues. In this study, by adopting a role-based service ecosystem modeling, we propose an NFC ecosystem model which perfectly specifies the roles in the ecosystem, and defines set of activities for each role, and communication structure. We analyzed NFC ecosystem in three phases as pre-installation, installation, and service usage. We have defined the activities and communication structure in the first two phases, and finally investigated the service usage phase in three different operating modes of NFC. After giving the details of the proposed ecosystem model, two use cases are given to validate the developed ecosystem model. We complete our study by discussing the requirement satisfaction.

WBAN 환경에서 Weighted Fair Queuing 기반의 GTS 타임 슬롯 할당 알고리즘

WBAN is short range wireless communication technology which is consists of several small devices close to, attached to or implanted into the human body. WBAN is classified into between medical and non-medical by applications based on technology and medical data with periodic characteristics is used the GTS method for transmitting data to guarantee the QoS. In this paper we proposed algorithm that resolve lack of GTSs while data transmit GTS method in superframe structure of WBAN. Coordinator dynamically allocates GTSs according to the data rate of devices and make devices share GTSs when lack of GTSs. We compared delay bounds, throughput for performance evaluation of the proposed algorithm. In other words, we proposed algorithm adaptive WFQ scheduling that GTS allocation support differential data rate in environments of WBAN. The experiment results show the throughput increased and the maximum delay decreased compared with Round Robin scheduling.

Design and Implementation of Mobile Objects Tracking System Based on Wireless Sensor Network

ZigBee technology, based on the IEEE802.15.4 protocol, is a newly developed short range wireless communication technology with the merits of low cost, low power consumption at comparably lower data rate. Mobile objects tracking system based on wireless sensor network becomes a hot topic recently. The paper, aiming at wireless sensor network, investigates the tracking system. Based on RSSI and location engine, the tacking system is implemented. The system includes three parts: hardware platform preparation, communication program of nodes and PC monitor software. The core of hardware platform is CC2430 and CC2431. The exploitation of node communication program is based on Z-Stack protocol stack which is provided by TI. The paper goes into details of the nodes communication flow. Elaborate solution is proposed in this paper. In the end, practical test is implemented. This part analyzes the influence of the different location area consisted by reference nodes to the accuracy and stability of blind nodes.

AN AGENT BASED TRANSACTION PROCESSING SCHEME FOR DISCONNECTED MOBILE NODES

We present a mobile transaction framework in which mobile users can share data which is stored in the cache of a mobile agent. This mobile agent is a special mobile node which coordinates the sharing process. The proposed framework allows mobile affiliation work groups to be formed dynamically with a mobile agent and mobile hosts. Using short range wireless communication technology, mobile users can simultaneously access the data from the cache of the mobile agent. The data Access Manager module at the mobile agent enforces concurrency control using cache invalidation technique. This model supports disconnected mobile computing allowing mobile agent to move along with the Mobile Hosts. The proposed Transaction frame work has been simulated in Java 2 and performance of this scheme is compared with existing frame works.

Combined synchronization and power control for differentially-encoded di-symbol time-division multiuser impulse radio

The differentially-encoded, di-symbol time-division multiuser impulse radio (d <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> TD-IR) with delay-sum autocorrelation receivers is a low complexity, high efficiency short range wireless communication technology for infrastructure networks. The d <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> TD-IR system is designed with the assumption that the users are perfectly synchronized. In this letter, we propose a recursive algorithm of combined synchronization and power control. Computer simulation results show that the proposed algorithm has significant performance improvement over the algorithm, in which synchronization and power control are performed separately.

풍력발전기 주축 및 날개 부하 측정시스템의 보정 및 불확실성 해석

The exact load measurements for the mechanical parts of a wind turbine are important step both for the evaluation of a specific wind turbine design and for a certification process. A common method for a mechanical load measurement is using a strain gauge sensing. Two main problems ought to be answered in order for this method to be applied to the wind turbine project. These are strain gauge calibration and non-contact signal transmission from the strain gauge output to a load monitoring system. This paper suggests reliable solutions for these two problems. A Bluetooth, a short range wireless data communication technology, is used to solve the second problem. The first one, the strain gauge calibration methodology for a load measurement in a wind turbine application, is fully explained in this paper. Various mechanical loadings for a strain gauge calibration in a wind turbine load measurement are introduced and analyzed. Initial experimental results which are obtained from a 1 kW small size wind turbine are analyzed, and the uncertainty problem in estimating mechanical loads using a calibration matrix is fully covered in this paper.