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Influence of physical parameters and age of power lines on PCL/BPL performance and reliability
Janás, Jan ; Mlýnek, Petr (referee) ; Benešl, Lukáš (advisor)
With the increasing demands on data transmission, other ways are being sought than standard data transmission via conventional data cables. One of these ways is communication over power lines - PLC or BPL technology. This method of communication is widely used in households, energy, industry and other fields where it is used for data collection, communication, or control of various devices. Before considering the use of BPL technology, it is first necessary to evaluate the considered power line to see if it is suitable and technically competent for this purpose.
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Apache JMeter Plugin to Analyze of Data Network Parameters
Hrdý, Martin ; Člupek, Vlastimil (referee) ; Číka, Petr (advisor)
Bachelor thesis discusses opportunites for utilization of the Apache JMeter testing tool to creating plug-in, which implements network parameters measuring. The goal of thesis is to design and implement a plug-in, which will handle data network transmission parameters measuring in accordance with appropriate recommendations. The first part describes the iPerf3 tool and the Apache JMeter testing tool. The next section deals with network transmission parameters recommendations. The practical part describes design, implementation and testing of created plug-in. Finally, the results of measurements are processed and clarified.
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Automated Testing of OS Linux Protocol Stack Behaviour During Congestion
Tomašov, Adrián ; Grégr, Matěj (referee) ; Lichtner, Ondrej (advisor)
Táto práca sa zaoberá štúdiom a simuláciou zahltenej siete v laboratorných podmienkach a následne automatizovaným testovaním protokolového zásobníka v operačnom systéme Linux na tejto sieti. Na základe sady experimentov zistíme, aký dopad na správanie protokolového zasobníku má zahltenie siete. Následne bude popísaný spôsob simulácie a emulácie takejto siete fyzickým zariadením. Výstupom tejto práce budú rôzne konfigurácie strojov a emulátorov pre zahltenie siete, a k ním priložená sada meraní s vyhodnotením výsledkov. Tieto konfigurácie budú použité v automatizovanom testovaní jadra operačného systému Linux, aby sa chyby vo vývoji a pri implementácii sieťových protokolov a ovládačov pre sieťové karty našli rýchlejšie.
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Intelligent system for remote data collection with PLC
Benešl, Lukáš ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
Bachelor thesis deals with PowerLine Communication (PLC), analyzes its advantages and disadvantages of this technology. Shows the frequency division according to the frequency range in which they work. The work includes a methodology of PLC communications testing according to Request For Comments (RFC) 1242 and RFC 2544 standards. Tests of the individual modems were measured in the household on a real network. All modems measured the same topology, and the results were appropriately processed in the form of well-arranged tables and charts. In conclusion, the individual conclusions from the measurements are always discussed. For the measurement of narrowband PLCs with multiple carriers on PRIME and G3 standards, the SAM4CP16C-EK development kit from Atmel was used. Narrowband modems, with single carrier, are represented by the PLC MT49R model manufactured by ModemTec. For broadband modems, the HomePlug AV2 standard was selected in comparison with HomePlug AV. Within the HomePlug AV2, the I2SE PLC Stamp 1200 micro EVK and Linksys PLEK500 development kit were used. For the lower standard of HomePlug AV, PLC was used by COMFAST.
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Comparison of simulation environments for analysis of wireless technology
Rimeg, Martin ; Fujdiak, Radek (referee) ; Kubánková, Anna (advisor)
This work is focused on the issue of wireless networks according to the IEEE 802.11 standard. The main subject of research is the Rate Adaptation Algorithms (RAA). The work also contains a description of simulation environments NS-3 and OMNeT in terms of adaptation algorithms. At the end of the work there is a summary of wireless network simulations in NS-3 and OMNeT environments and their comparison with the actual measurement of network parameters.
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Experimental Evaluation of IEEE 802.11ac/ad Wireless Technology Properties
Jošťák, Matej ; Mašek, Pavel (referee) ; Zeman, Kryštof (advisor)
This bachelor work is about experimental verification features of wireless network, with focused on high speed transfers. For measurement was chose standard IEEE 802.11ac/ad. In the theoretical part, we describe the Internet of Things and communications between devices, especially the M2M communication. Then in work follows the chronological description of standard IEEE 802.11. The practical part is about describing the used hardware, after which follow the detailed describe of theoretical and practical realization of application and measurements itself. The last part of work is about measured values, its evaluation and makes conclusions. In the inclosure are source codes of our applications and graphs.
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Interactions between WLAN networks
Doleželová, Eva ; Zeman, Kryštof (referee) ; Škorpil, Vladislav (advisor)
This bachelor thesis deals with the possible interferences caused by the parallel running WLAN networks. It explains the history and subsequent development of wireless technologies and then focuses on current WLAN networks. It describes the problem of interference in WLAN networks and parameters that contribute to mutual interference. Practical part of this thesis consists of two laboratory exercises. The first task is implemented in the Riverbed program, in which a topology with three identical WLAN routers is assembled. After testing the WLAN routers, a graph describing the interference in the 2.4 GHz band is displayed, which is achieved by a suitable choice of frequency band, transmission power and channel. The second laboratory task is implemented utilizing the Iperf3 program, which is installed on three Raspberry Pi´s (RPi Zero, RPi 3, and RPi 4). Network congestion is achieved using the wifijammer script, which is installed on RPi 4. In this second laboratory task, the transmission parameters were first verified and the service was denied using the wifijammer script. For evaluation of the second laboratory task, the IEEE 802.11b and IEEE 802.11n utilizing the frequency band 2,4 GHz were chosen. For testing, the following routers were used: Mercusys, Netis, Tp-Link and Asus routers. Once the measurements were over, all the data was processed and included as charts.
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Performance and security analysis of Wireguard technology
Varga, Oliver ; Holasová, Eva (referee) ; Krajsa, Ondřej (advisor)
This thesis deals with the description of WireGuard virtual private networks technology, its comparison with the technologies IPsec and OpenVPN based on the encrpytion algorithms they use to ensure security and also compares their technical parameters such as latency, jitter and transfer speeds. The work includes a description of the WireGuard technology, a comparison of the mentioned technologies and finally the results of the measurements of their technical parameters. The methodology chosen by us for testing the parameters, the hardware used to obtain the results and the network topology are also described. Finally, the results obtained from the tests are compared.
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Influence of physical parameters and age of power lines on PCL/BPL performance and reliability
Janás, Jan ; Mlýnek, Petr (referee) ; Benešl, Lukáš (advisor)
With the increasing demands on data transmission, other ways are being sought than standard data transmission via conventional data cables. One of these ways is communication over power lines - PLC or BPL technology. This method of communication is widely used in households, energy, industry and other fields where it is used for data collection, communication, or control of various devices. Before considering the use of BPL technology, it is first necessary to evaluate the considered power line to see if it is suitable and technically competent for this purpose.
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Interactions between WLAN networks
Doleželová, Eva ; Zeman, Kryštof (referee) ; Škorpil, Vladislav (advisor)
This bachelor thesis deals with the possible interferences caused by the parallel running WLAN networks. It explains the history and subsequent development of wireless technologies and then focuses on current WLAN networks. It describes the problem of interference in WLAN networks and parameters that contribute to mutual interference. Practical part of this thesis consists of two laboratory exercises. The first task is implemented in the Riverbed program, in which a topology with three identical WLAN routers is assembled. After testing the WLAN routers, a graph describing the interference in the 2.4 GHz band is displayed, which is achieved by a suitable choice of frequency band, transmission power and channel. The second laboratory task is implemented utilizing the Iperf3 program, which is installed on three Raspberry Pi´s (RPi Zero, RPi 3, and RPi 4). Network congestion is achieved using the wifijammer script, which is installed on RPi 4. In this second laboratory task, the transmission parameters were first verified and the service was denied using the wifijammer script. For evaluation of the second laboratory task, the IEEE 802.11b and IEEE 802.11n utilizing the frequency band 2,4 GHz were chosen. For testing, the following routers were used: Mercusys, Netis, Tp-Link and Asus routers. Once the measurements were over, all the data was processed and included as charts.
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