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Virtualization of ARM architecture and development of a universal control platform for embedded systems
Páleník, Luděk ; Mašek, Pavel (referee) ; Zeman, Kryštof (advisor)
Bachelor thesis "Virtualization of ARM architecture and development of a universal control platform for embedded systems" deals with theoretical analysis of IoT devices, M2M communications and virtualization techniques -- especially emulation of different processor architectures. The practical part is implementation of the modified emulated image for CM-T43 module from Texas Instruments manufacturer. QEMU emulation tool installed on Linux operating system is used for emulation. Another part of this work is to develop an application that allows reading and writing of data from / to each sensor based on a serial line (RS-232, RS-485) and Ethernet. The application is written in language C and uses the MODBUS protocol.
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IP Television
Mašek, Pavel ; Fojtová, Lucie (referee) ; Číka, Petr (advisor)
The main objective of thesis is proposal and realization programme, which can be able to receive and play up multimedia stream broadcasted from server via packet networks. Protocol for transmission multimedia data is used to join connection between server and end point. And therefore protocols which handle data transmission like RTP/RTCP, RTSP and also SDP and SAP are described in thesis. Description mentioned records isn't effected to the smallest details, but acts about acquaint with problems. Further be brief described libraries that the stand by drafting application in view as well as used application that the function as the source of transmission multimedia. Than follows proposal solving and single step description of programme design in thesis. Analysis of working programme is performed in the last part of thesis.
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Design of a programmable attenuator
Pokorný, Rostislav ; Mašek, Pavel (referee) ; Štůsek, Martin (advisor)
This Master´s thesis focuses on design and implementation of programmable attenuator. The main aim of this thesis is to create an electronical device that provide continuous setting of attenuation value in the range between 0–150 dB. Setting a value from the range can be performed using buttons and set values are shown on display. For this thesis an attenuator with working frequency between 0–6 GHz was chosen and four–layer printed circuit board was designed. As a result the device is fitted with an 8bit microcontroller ATmega328P–PU using five 6bit digital attenuators connected in series with manual and program settings of attenuation from 0–157,5 dB with step of 0,5 dB. Data are shown on a build–in display. The application for remote settings and value reading over integrated USB (Universal Serial Bus) interface, was created in C#. In conclusion of this thesis there is a measurement evaluation of attenuation measurement performed on the device.
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Simulation of H2H and M2M Communications in Mobile Network LTE-Advanced
Číhal, Josef ; Mašek, Pavel (referee) ; Hošek, Jiří (advisor)
This bachelor thesis „Simulation of H2H and M2M communication in LTE-Advanced mobile network“ focuses on theoretical study of H2H (Human to Human) and M2M (Ma- chine to Machine) communication in fourth-generation of mobile network (LTE/LTE- Advanced). It also focus on the influence of M2M communication to compliance with the agreed terms of quality of service (QoS) for H2H traffic. Based on the theoretical analysis was created model of H2H and M2M communication using NS-3(Network Si- mulator 3). Last part of bachelor thesis deals with verification of the functionality of created model through simulations focusing on the key operational parameters such as delay, throughput and load of base station (eNodeB).
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Analysis of simulation tools supporting Network Slicing in 5G networks
Kislerová, Helena ; Mašek, Pavel (referee) ; Koláčková, Aneta (advisor)
The main goal of this bachelor thesis was to study the available network simulation tools supporting network slicing in 5G networks, their subsequent analysis and selection of the most suitable one based on this analysis. The second part of the work is focused on creating a simulation scenario in which the individual slices of the network are overloaded in some parts of the day. This scenario is then simulated and its results are evaluated at the end of the work.
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Analysis of vehicular ad hoc network
Varmus, Pavol ; Mašek, Pavel (referee) ; Kubánková, Anna (advisor)
This diploma thesis aims to study VANET (vehicular ad hoc network), to describe the theory of this networks and describe attributes of these networks and to set the starting point for practical part. Thesis includes VANETs possibilities, its signal transportation and description of routing protocols. Another goal was to familiarize program NS-3 and set up simulation models in its interface. The main output of the practical part is program which simulates vehicle movement in Brno city and set the communication module which is adapted to fulfill the most realistic transmission capabilities. Practical part is divided to two parts. The goal of the first one was to simulate basic communication in theorized unrealistic scenario and the second part was the more realistic scenario. Overall, throughout the practical part was tested a variety of attributes, such as mobility models, standards, routing protocols and other parameters that provided diversity in final results. All the results, which consisted of summary of basic transmission capabilities and reclassification of the applicability of those technologies in real world, are discussed in the summary of the simulations output.
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Implementation and Performance Evaluation of the LoRaWAN Communication Technology Utilizing the NS-3
Bahna, Martin ; Možný, Radek (referee) ; Mašek, Pavel (advisor)
The diploma thesis deals with an implementation of the LoRaWAN wireless network within the NS-3 simulation environment. The thesis defines IoT in general, together with its technologies and types of communication between devices. Subsequently, the LPWAN technology is outlined, as well as its requirements and protocols that are most widely used with this technology. The thesis then describes the LoRaWAN technology in detail, its layers, network architecture and security. The practical part of this thesis sheds some light on the NS-3 simulation environment and the most suitable LoRaWAN module that was selected from the available ones. The chosen module is described in detail and imported to the NS-3 simulation environment. Two simulation scenarios are then performed. The first scenario is focused on the impact created by increasing the number of end devices in the network. The second scenario is focused on the impact created by increasing the distance between the end device and the gateway. The results of the simulations are recorded in the tables which are then used to display the given results in graphs. Last chapter deals with module modification where new frequency bands are implemented and theoretical setup of duplex and encrypted communication is described.
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Implementation of HDLC protocol in network simulators
Polášek, Jaromír ; Mašek, Pavel (referee) ; Pokorný, Jiří (advisor)
This diploma thesis deals with the possibility of using HDLC (High-Level Data Link Control) protocol for communication and addressing of smart metering devices with a data concentrator. The HDLC protocol is used in two DLMS/COSEM (Device Language Message Specification/Companion Specification for Energy Metering) communication profiles. To simulate these communication profiles, the most appropriate simulation program is selected. Using this simulator, the first communication profile is implemented and the second one is designed. Communication profile based on TCP/IP (Transmission Control Protocol/Internet Protocol) has been fully implemented. To implement the three-layer HDLC communication profile, all options have been thoroughly explored. Using these findings, a process was designed to guide the full implementation. For the first communication profile the qualitative parameters are measured, which are then plotted and evaluated.
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Analysis of Sharing Networks
Blažek, Libor ; Mašek, Pavel (referee) ; Horváth, Tomáš (advisor)
The aim of the thesis is the design and implementation of the protocol in OPNET Modeler. In this work will be developed all the elements have been used no default settings. In the first chapters, making simulation are defined packets. Another chapter consists of a block diagram of workstations, which are assigned to function blocks. The central process is created by the process model, also for the router. The individual elements are inserted into a variety of elements and subsequently used in the simulation. Connection is a new service that has been defined separately. One of the simulations will be created on a smaller scale and the other on a global scale with more features.
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Simulation of M2M Communication using IEEE 802.15.4
Pecina, Martin ; Šimek, Milan (referee) ; Mašek, Pavel (advisor)
This bachelor thesis „Simulation of M2M communication using IEEE 802.15.4“ focuses on therotical study of M2M devices and deployment of IPv6 protocol to sites of standard IEEE 802.15.4. Practical part is a simulation of 6LoWPAN communication between sensors with central node and followed by forwarding of information to remote database server located in the Internet through LTE site. For simulation there was used simulation tool Network Simulator 3.
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