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https://www.readbyqxmd.com/read/28590434/a-reliable-data-transmission-model-for-ieee-802-15-4e-enabled-wireless-sensor-network-under-wifi-interference
#1
Prasan Kumar Sahoo, Sudhir Ranjan Pattanaik, Shih-Lin Wu
The IEEE 802.15.4e standard proposes Medium Access Control (MAC) to support collision-free wireless channel access mechanisms for industrial, commercial and healthcare applications. However, unnecessary wastage of energy and bandwidth consumption occur due to inefficient backoff management and collisions. In this paper, a new channel access mechanism is designed for the buffer constraint sensor devices to reduce the packet drop rate, energy consumption and collisions. In order to avoid collision due to the hidden terminal problem, a new frame structure is designed for the data transmission...
June 7, 2017: Sensors
https://www.readbyqxmd.com/read/28481245/alternative-path-communication-in-wide-scale-cluster-tree-wireless-sensor-networks-using-inactive-periods
#2
Erico Leão, Carlos Montez, Ricardo Moraes, Paulo Portugal, Francisco Vasques
The IEEE 802.15.4/ZigBee cluster-tree topology is a suitable technology to deploy wide-scale Wireless Sensor Networks (WSNs). These networks are usually designed to support convergecast traffic, where all communication paths go through the PAN (Personal Area Network) coordinator. Nevertheless, peer-to-peer communication relationships may be also required for different types of WSN applications. That is the typical case of sensor and actuator networks, where local control loops must be closed using a reduced number of communication hops...
May 6, 2017: Sensors
https://www.readbyqxmd.com/read/28368341/security-enhancement-of-wireless-sensor-networks-using-signal-intervals
#3
Jaegeun Moon, Im Y Jung, Jaesoo Yoo
Various wireless technologies, such as RF, Bluetooth, and Zigbee, have been applied to sensor communications. However, the applications of Bluetooth-based wireless sensor networks (WSN) have a security issue. In one pairing process during Bluetooth communication, which is known as simple secure pairing (SSP), the devices are required to specify I/O capability or user interference to prevent man-in-the-middle (MITM) attacks. This study proposes an enhanced SSP in which a nonce to be transferred is converted to a corresponding signal interval...
April 2, 2017: Sensors
https://www.readbyqxmd.com/read/28304241/wireless-teleophthalmology-a-novel-low-cost-flexible-network-architecture-and-its-performance-evaluation-for-remote-eye-care-solutions
#4
Shashwat Pathak, Basant Kumar
INTRODUCTION: This article proposes a novel, cost-effective, flexible, and easy-to-deploy wireless teleophthalmology network architecture and performance evaluation for its potential use in remote areas. This study has used practical telecommunication standards, which is widely deployed throughout India. METHODS: In the proposed scenario, patient's eye images are obtained using a specified imaging modality, and then sent to a server at the primary eye care centre (PECC) using ZigBee a short-range wireless network...
March 17, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28296900/wireless-transmission-of-biosignals-for-hyperbaric-chamber-applications
#5
Carlos Perez-Vidal, Luis Gracia, Cristian Carmona, Bartomeu Alorda, Antonio Salinas
This paper presents a wireless system to send biosignals outside a hyperbaric chamber avoiding wires going through the chamber walls. Hyperbaric chambers are becoming more and more common due to new indications of hyperbaric oxygen treatments. Metallic walls physically isolate patients inside the chamber, where getting a patient's vital signs turns into a painstaking task. The paper proposes using a ZigBee-based network to wirelessly transmit the patient's biosignals to the outside of the chamber. In particular, a wearable battery supported device has been designed, implemented and tested...
2017: PloS One
https://www.readbyqxmd.com/read/28241488/monitoring-citrus-soil-moisture-and-nutrients-using-an-iot-based-system
#6
Xueyan Zhang, Jianwu Zhang, Lin Li, Yuzhu Zhang, Guocai Yang
Chongqing mountain citrus orchard is one of the main origins of Chinese citrus. Its planting terrain is complex and soil parent material is diverse. Currently, the citrus fertilization, irrigation and other management processes still have great blindness. They usually use the same pattern and the same formula rather than considering the orchard terrain features, soil differences, species characteristics and the state of tree growth. With the help of the ZigBee technology, artificial intelligence and decision support technology, this paper has developed the research on the application technology of agricultural Internet of Things for real-time monitoring of citrus soil moisture and nutrients as well as the research on the integration of fertilization and irrigation decision support system...
February 23, 2017: Sensors
https://www.readbyqxmd.com/read/28134822/superframe-duration-allocation-schemes-to-improve-the-throughput-of-cluster-tree-wireless-sensor-networks
#7
Erico Leão, Carlos Montez, Ricardo Moraes, Paulo Portugal, Francisco Vasques
The use ofWireless Sensor Network (WSN) technologies is an attractive option to support wide-scale monitoring applications, such as the ones that can be found in precision agriculture, environmental monitoring and industrial automation. The IEEE 802.15.4/ZigBee cluster-tree topology is a suitable topology to build wide-scale WSNs. Despite some of its known advantages, including timing synchronisation and duty-cycle operation, cluster-tree networks may suffer from severe network congestion problems due to the convergecast pattern of its communication traffic...
January 27, 2017: Sensors
https://www.readbyqxmd.com/read/27782058/from-wsn-towards-wot-open-api-scheme-based-on-onem2m-platforms
#8
Jaeho Kim, Sung-Chan Choi, Il-Yeup Ahn, Nak-Myoung Sung, Jaeseok Yun
Conventional computing systems have been able to be integrated into daily objects and connected to each other due to advances in computing and network technologies, such as wireless sensor networks (WSNs), forming a global network infrastructure, called the Internet of Things (IoT). To support the interconnection and interoperability between heterogeneous IoT systems, the availability of standardized, open application programming interfaces (APIs) is one of the key features of common software platforms for IoT devices, gateways, and servers...
October 6, 2016: Sensors
https://www.readbyqxmd.com/read/27775627/development-and-application-of-a-wireless-sensor-for-space-charge-density-measurement-in-an-ultra-high-voltage-direct-current-environment
#9
Encheng Xin, Yong Ju, Haiwen Yuan
A space charge density wireless measurement system based on the idea of distributed measurement is proposed for collecting and monitoring the space charge density in an ultra-high-voltage direct-current (UHVDC) environment. The proposed system architecture is composed of a number of wireless nodes connected with space charge density sensors and a base station. The space charge density sensor based on atmospheric ion counter method is elaborated and developed, and the ARM microprocessor and Zigbee radio frequency module are applied...
October 20, 2016: Sensors
https://www.readbyqxmd.com/read/27589751/implementation-and-analysis-of-a-wireless-sensor-network-based-pet-location-monitoring-system-for-domestic-scenarios
#10
Erik Aguirre, Peio Lopez-Iturri, Leyre Azpilicueta, José Javier Astrain, Jesús Villadangos, Daniel Santesteban, Francisco Falcone
The flexibility of new age wireless networks and the variety of sensors to measure a high number of variables, lead to new scenarios where anything can be monitored by small electronic devices, thereby implementing Wireless Sensor Networks (WSN). Thanks to ZigBee, RFID or WiFi networks the precise location of humans or animals as well as some biological parameters can be known in real-time. However, since wireless sensors must be attached to biological tissues and they are highly dispersive, propagation of electromagnetic waves must be studied to deploy an efficient and well-working network...
August 30, 2016: Sensors
https://www.readbyqxmd.com/read/27509495/a-wireless-sensor-network-with-soft-computing-localization-techniques-for-track-cycling-applications
#11
Sadik Kamel Gharghan, Rosdiadee Nordin, Mahamod Ismail
In this paper, we propose two soft computing localization techniques for wireless sensor networks (WSNs). The two techniques, Neural Fuzzy Inference System (ANFIS) and Artificial Neural Network (ANN), focus on a range-based localization method which relies on the measurement of the received signal strength indicator (RSSI) from the three ZigBee anchor nodes distributed throughout the track cycling field. The soft computing techniques aim to estimate the distance between bicycles moving on the cycle track for outdoor and indoor velodromes...
2016: Sensors
https://www.readbyqxmd.com/read/27447633/telecommunication-platforms-for-transmitting-sensor-data-over-communication-networks-state-of-the-art-and-challenges
#12
Kamil Staniec, Marcin Habrych
The importance of constructing wide-area sensor networks for holistic environmental state evaluation has been demonstrated. A general structure of such a network has been presented with distinction of three segments: local (based on ZigBee, Ethernet and ModBus techniques), core (base on cellular technologies) and the storage/application. The implementation of these techniques requires knowledge of their technical limitations and electromagnetic compatibility issues. The former refer to ZigBee performance degradation in multi-hop transmission, whereas the latter are associated with the common electromagnetic spectrum sharing with other existing technologies or with undesired radiated emissions generated by the radio modules of the sensor network...
2016: Sensors
https://www.readbyqxmd.com/read/27370489/a-flexible-touch-pressure-sensor-array-with-wireless-transmission-system-for-robotic-skin
#13
Ying Huang, Ding Fang, Can Wu, Weihua Wang, Xiaohui Guo, Ping Liu
Human skin contains multiple receptors and is able to sense various stimuli such as temperature, touch, pressure, and deformation, with high sensitivity and resolution. The development of skin-like sensors capable of sensing these stimuli is of great importance for various applications such as robots, touch detection, temperature monitoring, and strain gauges. Great efforts have been made to develop high performance touch sensor and pressure sensor. Compared with general sensor, the touch-pressure sensor which is reported in this paper not only can measure large pressure but also has a high resolution in the small range so that it can feel slight touch...
June 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27258297/lbmr-load-balanced-multipath-routing-for-wireless-data-intensive-transmission-in-real-time-medical-monitoring
#14
Chinyang Henry Tseng
In wireless networks, low-power Zigbee is an excellent network solution for wireless medical monitoring systems. Medical monitoring generally involves transmission of a large amount of data and easily causes bottleneck problems. Although Zigbee's AODV mesh routing provides extensible multi-hop data transmission to extend network coverage, it originally does not, and needs to support some form of load balancing mechanism to avoid bottlenecks. To guarantee a more reliable multi-hop data transmission for life-critical medical applications, we have developed a multipath solution, called Load-Balanced Multipath Routing (LBMR) to replace Zigbee's routing mechanism...
2016: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/27136550/exponential-arithmetic-based-self-healing-group-key-distribution-scheme-with-backward-secrecy-under-the-resource-constrained-wireless-networks
#15
Hua Guo, Yandong Zheng, Xiyong Zhang, Zhoujun Li
In resource-constrained wireless networks, resources such as storage space and communication bandwidth are limited. To guarantee secure communication in resource-constrained wireless networks, group keys should be distributed to users. The self-healing group key distribution (SGKD) scheme is a promising cryptographic tool, which can be used to distribute and update the group key for the secure group communication over unreliable wireless networks. Among all known SGKD schemes, exponential arithmetic based SGKD (E-SGKD) schemes reduce the storage overhead to constant, thus is suitable for the the resource-constrained wireless networks...
April 28, 2016: Sensors
https://www.readbyqxmd.com/read/27049390/a-portable-low-power-acquisition-system-with-a-urease-bioelectrochemical-sensor-for-potentiometric-detection-of-urea-concentrations
#16
Wei-Jhe Ma, Ching-Hsing Luo, Jiun-Ling Lin, Sin-Houng Chou, Ping-Hung Chen, Mei-Jywan Syu, Shin-Hung Kuo, Shin-Chi Lai
This paper presents a portable low-power battery-driven bioelectrochemical signal acquisition system for urea detection. The proposed design has several advantages, including high performance, low cost, low-power consumption, and high portability. A LT1789-1 low-supply-voltage instrumentation amplifier (IA) was used to measure and amplify the open-circuit potential (OCP) between the working and reference electrodes. An MSP430 micro-controller was programmed to process and transduce the signals to the custom-developed software by ZigBee RF module in wireless mode and UART in able mode...
April 2, 2016: Sensors
https://www.readbyqxmd.com/read/27006023/wireless-data-acquisition-of-transient-signals-for-mobile-spectrometry-applications
#17
Peter Trzcinski, Scott Weagant, Vassili Karanassios
Wireless data acquisition using smartphones or handhelds offers increased mobility, it provides reduced size and weight, it has low electrical power requirements, and (in some cases) it has an ability to access the internet. Thus, it is well suited for mobile spectrometry applications using miniaturized, field-portable spectrometers, or detectors for chemical analysis in the field (i.e., on-site). There are four main wireless communications standards that can be used for wireless data acquisition, namely ZigBee, Bluetooth, Wi-Fi, and UWB (ultra-wide band)...
May 2016: Applied Spectroscopy
https://www.readbyqxmd.com/read/26999162/a-priority-based-adaptive-mac-protocol-for-wireless-body-area-networks
#18
Sabin Bhandari, Sangman Moh
In wireless body area networks (WBANs), various sensors and actuators are placed on/inside the human body and connected wirelessly. WBANs have specific requirements for healthcare and medical applications, hence, standard protocols like the IEEE 802.15.4 cannot fulfill all the requirements. Consequently, many medium access control (MAC) protocols, mostly derived from the IEEE 802.15.4 superframe structure, have been studied. Nevertheless, they do not support a differentiated quality of service (QoS) for the various forms of traffic coexisting in a WBAN...
2016: Sensors
https://www.readbyqxmd.com/read/26861331/ieee-802-15-4-zigbee-based-time-of-arrival-estimation-for-wireless-sensor-networks
#19
Jeonghyeon Cheon, Hyunsu Hwang, Dongsun Kim, Yunho Jung
Precise time-of-arrival (TOA) estimation is one of the most important techniques in RF-based positioning systems that use wireless sensor networks (WSNs). Because the accuracy of TOA estimation is proportional to the RF signal bandwidth, using broad bandwidth is the most fundamental approach for achieving higher accuracy. Hence, ultra-wide-band (UWB) systems with a bandwidth of 500 MHz are commonly used. However, wireless systems with broad bandwidth suffer from the disadvantages of high complexity and high power consumption...
2016: Sensors
https://www.readbyqxmd.com/read/26828489/a-survey-on-urban-traffic-management-system-using-wireless-sensor-networks
#20
REVIEW
Kapileswar Nellore, Gerhard P Hancke
Nowadays, the number of vehicles has increased exponentially, but the bedrock capacities of roads and transportation systems have not developed in an equivalent way to efficiently cope with the number of vehicles traveling on them. Due to this, road jamming and traffic correlated pollution have increased with the associated adverse societal and financial effect on different markets worldwide. A static control system may block emergency vehicles due to traffic jams. Wireless Sensor networks (WSNs) have gained increasing attention in traffic detection and avoiding road congestion...
2016: Sensors
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