|
|
SIP/H.323 gateway with Asterisk PBX
Smékal, Lukáš ; Herman, Ivo (referee) ; Kovář, Petr (advisor)
This Bachelor’s thesis is engaged in problems of the internet telephony and its usage in today´s world, which offers many techniques how communicate among people. The internet telephony gives telephoning other format and shows new possibilities of IP protocol´s usage. The thesis is focused on the most used protocol corveying functions of VoIP technology, it is the standard H.323 and also the SIP protokol, which even if provides the same functions as H.323 is based on the different principle and because of its easy structure, it prepares good conditions for rise of new applications and services in internet telephony. In this thesis the Open Source private branch exchange Asterisk is also discussed. Asterisk, not only thanks to the usage of Voice over IP provides against the standard analogue private branch exchange many advantages and thanks to its modularity and expansibility also offers much more possibilities of configuration. The Session Initiation Protocol (SIP) is the basic protocol, with which Asterisk works. The standard H.323 is not implemented in the basic installation of Asterisk, therefore it is necessary to do its suitable installation and congiruation, in order to expand exchange´s functions for work with this standard and also to be able to realize translation between the protocol SIP and the standard H.323. The results, which I accomplished, are presented in the chapters „Dosažené výsledky“ and in the conclusion of the bachelor’s thesis.
|
|
|
Modern treatments by powder paints
Blažek, Jaroslav ; Kovář, Petr (referee) ; Kubíček, Jaroslav (advisor)
The bachelor thesis was written in the subject B 2341 within the bachelor studies. It deals with the analysis of finishing treatment with the powder plastics. The growth of innovations has recently been registered in this field. The thesis contains analysis of particular surface pre-treatment methods suitable for powder coating. Next, there is the powder plastics analysis and their application methods. The setting process description and the description of several color systems used today are also part of the work.
|
|
|
Analysis of adhesives in general engineering
Trhoň, Vojtěch ; Kovář, Petr (referee) ; Kubíček, Jaroslav (advisor)
This bachelor thesis is concerned with analysis of adhesives in general engineering and it is focusing on the partition of adhesives according to curring and usability. Positive and negative mechanical stress of glued joints are characterised here. The technologic process of gluding side panels of tram is elaborated in the end of this bachelor thesis.
|
|
|
SMS Application for JavaME Platform
Růčka, Lukáš ; Burget, Radim (referee) ; Kovář, Petr (advisor)
The aim of this diploma thesis is to study the potential of Java ME platform for receiving and sending of SMS and to utilize obtained information subsequently in implementation of an application for this platform. The first part of the diploma thesis aims at explaining general terms of the Java language and its basic features. The next part deals with specific properties of the Java ME platform and properties of devices that support this platform. A design of the Java ME application based on theoretical knowledge is created then. This application has to be able to receive, process, store and send SMS and communicate with the server application based on the Java SE platform. The created Java ME application serves as an automated SMS voting server, which can be used in mobile devices that support the Java ME platform and can be remote-controlled via Internet from the Java SE platform application. The final chapter presents the results and conclusions of testing of the created application on real mobile devices.
|
|
|
The Differences Between PHP and ASP.NET in Dynamic Web Development
Jánoš, Radan ; Vyoral, Josef (referee) ; Kovář, Petr (advisor)
This bachelor thesis analyses the possibilities of dynamic web content development by the help of technologies PHP and ASP.NET, attempting to compare both of them and establishes basic differences. All work is divided into the four main chapters. First, introductory part, treat of dynamic web content development, used technologies and initiatress reader to the given problems. The second chapter is already about analysing and comparing the two technologies mentioned above. This part begins by the basic introduction and history of technologies, follows practical part „ installation, setting, configuration", where is reader familiarized with needed development tools for starting each of technology. Further treat of the way of writing server code including syntax of languages, in which is PHP compared with language C# and describes the object orientation of languages. Chapter includes the samples of data access by both of the technologies, whether it uses functions or objects, special libraries etc. Summarises the support of platforms for mull over technologies and describes development environments that can be used to realize applications by the help of these technologies. Third chapter is engaged in design and practical realization of simple editorial system web application in both above described technologies. The editorial system is using appropriate database systems and includes basic content management interface, which is administred and managed through the web interface. Last chapter contains final estimation and summarization of ascertained conclusions, recapitulate downright findings and tries to answer the question, in which cases give priority to ASP.NET before PHP and on the contrary.
|
|
|
Proposal for Cross-Dock Capacity Expansion in Logistic Company
Doseděl, Filip ; Kovář, Petr (referee) ; Bartošek, Vladimír (advisor)
The bachelor´s thesis deals with necessary cross-dock capacity expansion in logistic company. In the first part is prepared a theoretical basis for the following two parts. The second part of thesis is to analyse the current state of storage capacities and material flows in the company. Third, the proposal part, determines on the basis of the analysis the best alternative solution to the problem mentioned above.
|
|
|
IP Multimedia Subsystem
Bendíček, Martin ; Novotný, Vít (referee) ; Kovář, Petr (advisor)
This Master’s thesis deals with IMS architecture problems. This thesis describes its creation and progress, also structure of this architecture is mentioned. Text of this thesis describes function of the most important parts of the architecture, such as Proxy-CSCF, Interrogating-CSCF, Serving-CSCF and HSS. IMS architecture uses SIP protocol for establishment, maintenance and closing session and Diameter protocol for network management functions. That is why this thesis also describes characteristics of these two protocols. Next part of the thesis is focused on Open-source platform Open IMS Core and its installation. Open IMS Core platform was developed for testing IMS technologies within an internal project at the Fraunhofer Institute FOKUS in Berlin. Nowadays it is used by major part of vendors and providers for testing their products and services. As a main theme of this thesis, there was made a simple network, which consists of three users. This network is established on fundamentals of IMS and it was made in Open IMS Core. So in one chapter is outlined a process of its creation. There is described a process of adding a user list to database server HSS. In the next part there are mentioned some information about setup of virtual IMS terminal. Eventually there are shown some possibilities of how to catch traffic in the network. In this chapter there are also state diagrams, which describe a process of registration of IMS terminal and also a process of establishment, maintenance and closing session.
|
|
|
Utilization of wireless transfers in J2ME applications
Mikulecký, Miloš ; Kovář, Petr (referee) ; Jeřábek, Jan (advisor)
This Bachelor´s thesis consider to problemation of programing J2ME aplication with specialized on wireless transfers. As the wireless technology was selected technology Bluetooth, what is implemented on the majority mobile phones at now. Aplication was projected and realized enabling transfers short messages between mobile phones over interface Bluetooth. The aplication was developed in programation enviroment NetBeans. The aplication was tested on some mobile phones different marks and types. It turned out, that some mobile phones is differnet, though mobile phones are of the same mark.
|
|
|
Design and development of application for position monitoring
Kovář, Petr ; Šilhavý, Pavel (referee) ; Krajsa, Ondřej (advisor)
The aim of the master’s thesis was to implement in the C++ language a software solution of the localization of the mobile phone with Symbian OS in the GSM network. The intended purpose of this solution would be especially the phone localization in the case of its theft or loss. A familiarization with the development process of the Symbian platform and understanding the features of the Symbian version of the C++ language preceded the realization itself, because the Symbian C++ has an original style of the memory manipulation and error handling. The Symbian C++ basic principles and its features used in the implemented software are described in the second chapter of the text part, the first chapter deals with the history and version structuring of the Symbian OS. In the third part of the text is described the created software. The realized solution consists of three parts – server application PhoneLocServer for a mobile device, client application PhoneLocClient for a PC and the web-located part. The server was developed for the Symbian OS in the C++ language in the IDE Carbide.c++ and was tested in the S60 3rd edition SDK MR emulator and on the real device Nokia N73. It is a GUI-less application running in the background, which is run automatically after a smartphone start-up. It controls the incoming SMS over the socket listening and the messages addressed to itself processes before a user can notice them. The control messages body is comprised of a prefix, which identifies them, a password, a sending period value and a state to which application should change. After the receiving of the control SMS server verifies the SMS sender through the use of his telephone number and the password. It compares these values with the data stored for the given IMEI on the web server. If the verification succeeds, the server runs a timer with the period known from the control SMS and on the callback of this timer are transferred the data describing current phone location and state via HTTP protocol to the web server. The GSM localization method “Cell ID” is used for the location determination. After the client user asks for the start of loading the data, he must answer the password and the observed phone’s IMEI and he is verified through the use of the web server again. If the verification succeeds, the periodic download of the server data starts and from the first downloaded file is found out the upload period. Download then continues till the time the client detects the end of sending by the server part or till the client user stops the download himself. The client was developed in the C++ language in the C++ Builder environment. It requires a Windows OS and internet connection for its right function. The web server mediates communication between the server and the client, stores the data for user verification and makes possible the server-side upload by the help of a simple PHP script. In all the used web server directories is present the .htaccess file to improve its security, e.g. it denies the directory listing in a web browser.
|
|
|
Implementation of UMTS package in NS2
Bernát, Michal ; Kovář, Petr (referee) ; Šimek, Milan (advisor)
This bachelor thesis is in the first part focused to research of actual IPTV technologies in global and mobile networks and their processing. It compares IPTV's adventages and disadventages and as well presents actual czech and world-wide offers. There are also discussed other possibilities of mobile TV spreading. Second part deals with the simulation tool NS2 (Network Simulator 2), its description, installation and implementation of extension package for UMTS network simulations. There is created and described simulation with relatively simple scenario to illustrate possibilities of this extension. All practical demonstrations and the installation source codes, which had to be corrected because of compatibility with new versions of operating systems, are now attached to the DVD.
|
guest ::
RSS feed.