National Repository of Grey Literature 10 records found  Search took 0.00 seconds. 
Performance Analysis of Mobile Networks for M2M Communication
Důbrava, Marek ; Kováč, Dominik (referee) ; Mašek, Pavel (advisor)
This bachelor thesis "The benchmark analysis of mobile network for M2M communication" focuses on theoretical study of M2M devices and third- and fourth-generation mobile networks. The second part of the thesis is devoted to the LTE network overload simulation. The LTE network overload is achieved in two ways: the overload caused by the volume of data transmitted, or the overload caused by devices newly connected to the network. The third part of the thesis deals with the design and simulation improvement of M2M communication in the LTE network. A network simulator OPNET Modeler was used for the simulation.
Measurement of mobile network parameters
Gábor, Tomáš ; Hanus, Stanislav (referee) ; Klozar, Lukáš (advisor)
This work deals with theoretical study and practical implementation of measurement and storing of mobile network parameters and following designing an programming web interface for their presentation. IT describes structure and development of GSM and UMTS networks. It also deals with satellite navigation system GPS and measuring module Telit UC864-G, which was used for measuring. The next step was to select a group of parameters that are important for calculating the quality of the signal path and to analyze process of storing the data into the database. In the end is completely described web interface and also all applied programming languages and methods.
Control unit for 3G wireless module
Vávra, Tomáš ; Hanus, Stanislav (referee) ; Klozar, Lukáš (advisor)
This document deals with theoretical analysis of types and parameters of 3G UMTS modules. Briefly describing basic terms and principles of cellular networks and Global Position System. UMTS modules are firstly described from general point of view and subsequently there is comparison of two specific modules. Part of this document is practical design of control unit for 3G wireless module Telit UC864-G. Design starts with analysis of the module features and subsequently there is description of design procedure that begins with block diagram and ends with circuit schematic and printed circuit layout. Last part of this document describes construction of controll unit, its testing and finally even testing of module itself through serial bus RS-232 from PC with use of program with grafic interface, which have been written for this purpose.
Wireless Networks Displaying on PDA
Liška, Jan ; Kočí, Radek (referee) ; Hanáček, Petr (advisor)
This work deals with design and realization od an application for Pocket PC which displays wireless networks on a map. The goal of this project is to display signal coverage of an area together with a base station. This paper also deals with GSM localization. The main part describes station position calculation, concept and implementation of the application. In the end there are suggestions for future development of the application.
Detection of SPAM Messages in Mobile Communication and Social Networks
Jaroš, Ján ; Rychlý, Marek (referee) ; Očenášek, Pavel (advisor)
This thesis deals with spam in mobile and social networks. It focuses on spam in SMS messages and web service Twitter. Theoretical part provides brief overview of those two media, informations about what spam is, how to defend against it and where does it comes from. There is also a list of methods for spam detection, many of them have their roots in filtration of email communication. The rest of thesis is about design, implementation of application  for spam detection in SMS and Twitter messages and evaluation of its performance.
Multimedia Services in Mobile Networks
Kovář, Petr ; Molnár, Karol (advisor)
Long time ago, there were developed methods which can allow fast exchange of information at the longest distance possible. Until recent time, the possibilities of long way communications were very limited. There were technological and financial limitations mainly. With telegraph, telephone and the newest – computer networks invention, the telecommunication services became cheaper and much more comprehensive. With accession and high scale spread of internet, the role of communications is much more important. The most actual trend is mobile internet and connected multimedia networks and their instant accessibility from anywhere. On the first side there are classical telecommunication networks as GSM, UMTS, on the other side there is very strong alternative in shape of WiMAX and WiFi networks combination. For the usage of multimedia services in that networks is very important to handle their prefferization over other traffic, which is very difficult task even on wireless media. For the finding of new processes and methods, which can allow it, there is, at fist, the need for highly accurate and authentic mathematical models. In this doctoral thesis is mapped actual state of the art and proposed the new mathematical model of Distribution Coordination Function, which is much-frequent used as access method in 802.11 networks, Wi-Fi.
Measurement and Modeling of Wireless Network Coverage
Julínek, Pavel ; Prokopec, Jan (referee) ; Kaller, Ondřej (advisor)
The diploma thesis describes mobile communication systems GSM and UMTS including the operating principle of these systems. It also deals with the GPS issues and the determination of the location by this system. The signal path losses issues between the transmitter and receiver are also described. The focus is also put on Telit UC864-G model and the measurement system, operated by the created programme with the graphic user interface, which measures parameters of the cellular network according to entered input parameters and saves the measured values into the file. The part of the diploma thesis describes another created programme with the graphic user interface displaying the measured network parameters in map data with the possibility to compare the distribution of the measured signal value in both outdoor and indoor environment and the theoretical value set by the propagation models.
Development of IP Multimedia Subsystem architecture
Hladíková, Vladimíra ; Číka, Petr (referee) ; Novotný, Vít (advisor)
Bachelor thesis topic is focused on convergence of networks and services in the environment of mobile networks with implementation of Internet Protocol Multimedia Subsystem (IMS). The first part is, devoted to reasons of design of new system, such as IMS (Internet Protocol Multimedia Subsystem) and which possibilities this architecture brings to users. I mentioned institutions and organizations, which are involved in the development of this system. In this chapter is shortly defined history of single standardised parts. In the next part is defined the IMS architecture its main part and functions. I defined which services of this system are possible to offer. To guarantee the high-quality transfer in the sites based on IP protocol is very important to guarantee quality of QoS (Quality of Service) services. So I take the aim to that in one of the next chapters. I mentioned quality assurance principles. The main factor that influences the quality of the transfer is which type of data is being transferred in IP network. The next charter is devoted authentication and authorisation in IMS network. I described the integration with Diameter protocol. The main part is devoted to VoIP (Voice over IP), the transfer of voice in IP networks. I defined the main idea of transfer of voice in IP networks. Codecs are very important for the voice transfer in IP networks, so I give a conspectus here. The next chapter gives attention to used protocols. The system could not work without them. It goes around SDP (Session Description Protocol), protocols for real-time data transfer RTP (Real-time Transport Protocol), RTCP (RTP Control Protocol), RTSP (Real-Time Streaming Protocol) - and the most important signalling protocol SIP (Session Initiation Protocol) and its integration with IMS. Finally I rated possibilities of IMS in mobile communication network and their use for VoIP. Among others I take into consideration also economical influences over the expansion of equipment supporting services with implementation IMS for general public.
CURRENT STATE OF MOBILE INTERNET IN THE CZECH REPUBLIC AND POSSIBILITIES OF ITS UTILIZATION IN VERY SMALL BUSINESSES AND TRADERS
Kysela, Jiří ; Bruckner, Tomáš (advisor) ; Novotný, Miroslav (referee)
This thesis presents/offers a comprehensive view of the issue of mobile Internet aimed at very small businesses and traders. In my thesis I focus on the practical applicability of mobile Internet by means of mobile technologies in the forenamed undertakings. First part of the thesis deals with the methodology of the area of very small businesses and traders and analyses present possibilities of application of mobile technologies and their suitability and usability for very small businesses and traders. Second part of the thesis identifies types of undertaking that can take advantage of mobile Internet and shows that this technology entails time and funds saving. Third part demonstrates concrete applications of mobile Internet in the activities of undertakings and presents the possibilities of gaining a support from the European Union structural funds for the implementation of mobile Internet.
Mobile Connectivity Phenomenon
Štangl, Rastislav ; Toman, Prokop (advisor) ; Čandík, Marek (referee)
Bakalářská práce je zaměřena na oblast mobilního připojení do sítě internet. Popisuje jednotlivé technologie mobilního připojení dostupné v ČR a analyzuje aktuální statistické údaje o trhu. Autor v práci porovnává a zhodnocuje nabídky služeb mobilního připojení v ČR a tyto závěry aplikuje aplikuje v konkrétních modelových situacích. Práce předkládá výsledky testů mobilního připojení spolu s praktickými zkušenostmi a doporučeními autora. V závěru shrnuje aktuální dění a trendy v oblasti mobilního připojení.

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