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On The Limits Of The Lorawan Technology: Evaluation Of Spreading Factors’ Performance
Možný, Radek
Over the course of the recent decade, the Low-Power Wide-Area (LPWA) technologies took their momentum and started to enable the reliable data transmissions in the Internet of Things (IoT) and Industry 4.0. In this paper, the LoRaWAN communication technology i.e., the licenseexempt LPWA technology is described. The focus is given to the practical evaluation of different configurations of the Spreading Factor (SF) based on the signal level. The obtained results from the laboratory measurements confirm the suitability of lower SFs in case of decreased signal levels i.e. conditions close to the “deep indoor scenarios”.
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Signal propagation modeling for LPWA communication technologies
Pekárková, Kateřina ; Mašek, Pavel (referee) ; Možný, Radek (advisor)
At present, the area of LPWAN (Low Power Wide Area Network) wireless communication technologies is developing very dynamically, where the number of connected devices is rapidly increasing and thus the need to ensure implementation. An important part of the design and testing of a possible implementation of such an LPWA (Low Power Wide Area) network is the modeling of signal propagation in a given environment to ensure sufficient signal coverage. This work deals with the study of LPWAN wireless communication technologies operating in both the unlicensed frequency band and the licensed frequency band. In the practical part, the work focuses on the simulation of signal propagation using the simulation tool Wireless InSite, where the communication parameters were set according to WM-BUS (Wireless Meter Bus) technology.
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Universal Tester of Radio Conditions for Narrowband IoT Communication Technology
Možný, Radek ; Štůsek, Martin (referee) ; Mašek, Pavel (advisor)
Technology Narrowband IoT is a representative LPWA (Low Power Wide Area) tech-nology that due to its promising features aims for demands of the Internet of Thingsapplications for autonomous data sending from sensors in areas of poor mobile coverage.For such applications, it is beneficial to firstly map properties of communication technol-ogy in areas of intended use and evaluate whether or not is this technology applicable.This Master thesis deals with the design of the hand-held measuring device for evaluationof Narrowband IoT properties. The output of this thesis is firstly comparison of LPWAtechnologies secondly, design of the mentioned device and verification of its functional-ity. And in last part description of measurement of transmission delay for delay-tolerantapplications. Transmission delay is a critical parameter for delay-tolerant applications.Such an application can be, for example, smart electrometers for which there is definedmaximal allowed transmission delay of 10 seconds and therefore it is desirable to evalu-ate whether or not is the deployment of the communication technology Narrowband IoTsuitable in the intended area for delay-tolerant or even for delay-intolerant applications.
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Implementation of Communication Technology LTE Cat-M1 Utilizing the Network Simulator 3
Drápela, Roman ; Jeřábek, Jan (referee) ; Mašek, Pavel (advisor)
Diploma thesis deals with the implementation of LTE Cat-M1 technology in simulator NS--3 (Network Simulator 3). The theoretical part of the thesis summarizes key terms concerning IoT (Internet of Things), M2M (Machine-to-Machine) communication, LTE (Long Term Evolution) and LPWA (Low-Power Wide Area) networks. The practical part summarizes the possibilities of currently available modules for cellular technologies for NS-3, ie. the LENA module and the subsequent extension of LENA+ and ELENA. Simulation scenarios offer a comparison of LTE/LTE-A and LTE Cat-M1 (also known as eMTC - enhanced Machine Type Communication) technologies for M2M communication. The results of the simulations are well-arranged in the form of graphs and discussed at the end of the thesis.
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Design of IoT device communicating by using NB-IoT standard
Vörös, Ondrej ; Povalač, Aleš (referee) ; Miloš, Jiří (advisor)
This diploma thesis deals with the design of low-power IoT device communicating by using the NB-IoT standard. The theoretical part of the thesis is dedicated to the explanation of the principles and capabilities of communication in IoT networks Sigfox, LoRa and NB-IoT, and also its physical layer, network architecture, techonology principles and frequency bands used. The application part of the thesis is dedicated to design of the NB-IoT device from the system design through the selection of main components to the detailed physical design of the device. Two prototypes of the device with two different radio modules used are fabricated on which is performed measurement of the power profile of the device in various operation modes.
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