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Wyszukujesz frazę "IEEE 802.15.4" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Developments on an IEEE 802.15.4-based wireless sensor network
Autorzy:
Scheers, B.
Mees, W.
Lauwens, B.
Powiązania:
https://bibliotekanauki.pl/articles/308225.pdf
Data publikacji:
2008
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
wireless sensor networks
IEEE 802.15.4
effective data capacity
positioning
Opis:
In this paper a summary is given of the ongoing research at the Belgian Royal Military Academy in the field of mobile ad hoc networks in general and wireless sensor networks (WSNs) in particular. In this study, all wireless sensor networks are based on the physical and the medium access layer of the IEEE 802.15.4 low rate wireless personal area networks standard. The paper gives a short overview of the IEEE 802.15.4 standard in the beaconless mode together with a description of the sensor nodes and the software used throughout this work. The paper also reports on the development of a packet sniffer for IEEE 802.15.4 integrated in wireshark. This packet sniffer turns out to be indispensable for debugging purposes. In view of future applications on the wireless network, we made a theoretical study of the effective data capacity and compared this with measurements performed on a real sensor network. The differences between measurements and theory are explained. In case of geograph- ically meaningful sensor data, it is important to have a knowledge of the relative position of each node. In the last part of the paper we present some experimental results of positioning based on the received signal strength indicators (RSSI). As one could expect, the accuracy of such a method is poor, even in a well controlled environment. But the method has some potential.
Źródło:
Journal of Telecommunications and Information Technology; 2008, 2; 46-53
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building a wireless sensor network with use of RFM 12 modules - data exchange between nodes
Autorzy:
Mazur, D.
Maciąg, P.
Kielan, P.
Powiązania:
https://bibliotekanauki.pl/articles/114472.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
IEEE 802.15.4 standard
wireless sensor networks
RFM modules
ATmega processors
Opis:
IEEE 802.15.4 standard defines Physical (PHY) and Wireless Medium Access Control (MAC) layers for wireless sensor networks (WSN). In recent years, many types of wireless sensor networks have been developed based on this standard. Currently, probably the most popular implementation of the mentioned standard are wireless ZigBee networks. Moreover, ZigBee provides functions normally attributed to the higher layers of network protocol stack. Among those the most important functions are: routing of data, data encryption and providing redundancy connections between devices in the network. We present a slightly different approach to the construction of wireless sensor networks. This is the beginning of series of papers about implementation of the IEEE 802.15.4 standard and the previously mentioned expansion functions in the network, built with RFM wireless communication modules and ATmega processors. This paper describes the basics of compiling wireless connection and data transmission with using RFM modules. In addition, blocking and non-blocking types of connections between radio modules and ways to connect RFM modules with ATmega processors are described.
Źródło:
Measurement Automation Monitoring; 2015, 61, 9; 438-442
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and Analysis of Additional Clear Channel Assessment to Improve Performance of IEEE 802.15.4-based MAC Protocol
Autorzy:
Asuti, Manjunath G.
Basarkod, Prabhugoud I.
Powiązania:
https://bibliotekanauki.pl/articles/308709.pdf
Data publikacji:
2020
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
clear channel assessment
CSMA/CA mechanism
IEEE 802.15.4
MAC protocol
wireless sensor networks
Opis:
Design of the MAC protocol is crucial in all wireless sensor networks (WSNs) due to its influence on the performance of the transceiver, i.e. the most energy-consuming component of each sensor node. A mechanism known as “carrier sense multiple access with collision avoidance” (CSMA/CA) is used for accessing the wireless channel in the IEEE 802.15.4 standard-based MAC protocol in order to avoid collisions between the network’s communicating nodes. CSMA/CA relies on two clear channel assessments (CCA=2) for checking the status of the channel. In this paper, we develop an additional CCA algorithm for the two scenarios encountered in star topology-enabled WSNs. Next, we investigate the impact of an additional clear channel assessment (CCA=3) on performance in IEEE 802.15.4. We develop a Markov chain model for the proposed methodology, and validate it using Matlab. Simulation results show that there is a significant improvement of performance metrics in the IEEE 802.15.4 standard-based MAC protocol with an additional CCA.
Źródło:
Journal of Telecommunications and Information Technology; 2020, 3; 10-21
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wireless Communication Solution for Distributed Structural Health Monitoring
Autorzy:
Andrzejczak, A.
Łęczycki, P.
Makowski, M.
Pękosławski, B.
Pietrzak, P.
Napieralski, A.
Powiązania:
https://bibliotekanauki.pl/articles/226561.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wireless sensor networks
IEEE 802.15.4
Bluetooth Low Energy
DASH7
IEEE 802.11n
ZigBee
weightless
structural health monitoring
Opis:
This paper describes a design of wireless distributed SHM (Structure Health Monitoring) system with a particular emphasis on comparison of wireless communication standards. The presented solution is being deployed in the TULCOEMPA project. Several wireless communication standards are compared, with their benefits, disadvantages and typical areas of application. A choice of proper ISM (Industrial Scientific Medical) band and reasons for use of Wireless Sensor Networks are also discussed. The last part of this paper presents the proposed structure and designed prototype. The chosen architecture of the system and the program algorithm used for communication and measurements are described.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 2; 177-184
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of energy consumption in 6TiSCH network nodes working in sub-GHz band
Autorzy:
Kubaszek, Mateusz
Macheta, Jan
Krzak, Łukasz
Worek, Cezary
Powiązania:
https://bibliotekanauki.pl/articles/963844.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
IEEE802.15.4e
TSCH
6TiSCH
energy
modelling
energy consumption
wireless sensor networks
industrial IoT
mesh networks
Opis:
The 6TiSCH communication stack enables IPv6 networking over the TSCH (Time Slotted Channel Hopping) mode of operation defined in IEEE 802.15.4. Lately it became an attractive solution for Low power and Lossy Networks (LLNs), suitable for Industrial Internet (IIoT) applications. This article introduces a credible energy consumption model for the 6TiSCH network nodes, operating in the 863-870 MHz band. It presents the analysis leading to the construction of the model as well as verification through experimental measurements which showed 98% accuracy in determining power consumption for two different network topologies. The article includes reliable battery lifetime predictions for transit and leaf nodes along with other parametric study results.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 1; 201-210
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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