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Optical amplifiers for metropolitan and access networks
Čech, Martin ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
Aim of this Master´s thesis is to describe and compare most common types of optical amplifiers used in today’s networks. The first section focuses on problematic of optical transmissions and phenomenon which cause degradation of transmitted signal. It is also explained in this section why there is a need to deploy optical amplifiers. Next section describes basic principles, structure and properties of individual types of optical amplifiers. Following section describes simulations which were made to compare the performance of transmission systems with each individual type of optical amplifier. The last section contains a design of optical metropolitan network with wavelength multiplex. Based on simulations from preceding part best amplifier type and optimal amplifier placement was selected. Functionality of the design was tested and simulations described in final section.
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A new security model implemented in the metropolitan network
Dančuk, Michal ; Kyselák, Martin (referee) ; Škorpil, Vladislav (advisor)
This diploma thesis deals with wireless computer networks in a point of view security. It contains security principles and standards used in these networks. It shows failings of old security methods in contras of new standards. The result of the thesis is a design of the metropolitan network and its realization. In this network appropriate solutions of security are used. The last part of the thesis deals with a design of web applications created in the PHP programming language and SQL database system.
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Optimization of transport network configuration
Švec, Adam ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
The communication networks, that we know nowadays has been changing since the time when Alexander Graham Bell discovered the great invention of that time – the telephone. It was mainly the level of the technique and electronics that helped to improve the first systems of connection between each other. This process caused the first communication networks. All the changes were done on the field of the radio operation. The networks were analog and were contained mainly by metallic – cooper wire. On the field of radio communication were mainly electromagnetic waves which maintained the connection of the places where was not able to stretch trunk cables. Communication has made huge qualitative improvement. This process has used different types of wire that were able to transmit higher and higher frequencies and to raise a number of made connections. All those changes were involved in radio network. In 1950s the entertainment was made mainly through television broadcast. This improvement needed the new studios and broadcast systems and also the radio improved. In that time there was huge automatic PBX equipped with stepper drivers matrix switches. The networks started to be divided into access drivers which resulted from the subscriber terminal to the first connection point, for example, the first public telephone exchange. Among these exchanges was formed their interlinking transport or transportation network, to finally, after reaching the target (last panel) would be merged back into the network access for remote users. The aim is to describe some properties of transport networks, the contemporary, which has been fully digital technology. We will focus on data networks, i.e. those that are available to contemporary man, and describe some of the technologies and components that can be used. We meet with OPNET Modeler software and the philosophy of working with him. We recommend optimalization of the designed transportation network on the basis of OPNET Modeler simulation results. Afterwards we design a suitable laboratory task for bachelor degree students of Teleinformatics.
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Optimization of transport network configuration
Švec, Adam ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
The communication networks, that we know nowadays has been changing since the time when Alexander Graham Bell discovered the great invention of that time – the telephone. It was mainly the level of the technique and electronics that helped to improve the first systems of connection between each other. This process caused the first communication networks. All the changes were done on the field of the radio operation. The networks were analog and were contained mainly by metallic – cooper wire. On the field of radio communication were mainly electromagnetic waves which maintained the connection of the places where was not able to stretch trunk cables. Communication has made huge qualitative improvement. This process has used different types of wire that were able to transmit higher and higher frequencies and to raise a number of made connections. All those changes were involved in radio network. In 1950s the entertainment was made mainly through television broadcast. This improvement needed the new studios and broadcast systems and also the radio improved. In that time there was huge automatic PBX equipped with stepper drivers matrix switches. The networks started to be divided into access drivers which resulted from the subscriber terminal to the first connection point, for example, the first public telephone exchange. Among these exchanges was formed their interlinking transport or transportation network, to finally, after reaching the target (last panel) would be merged back into the network access for remote users. The aim is to describe some properties of transport networks, the contemporary, which has been fully digital technology. We will focus on data networks, i.e. those that are available to contemporary man, and describe some of the technologies and components that can be used. We meet with OPNET Modeler software and the philosophy of working with him. We recommend optimalization of the designed transportation network on the basis of OPNET Modeler simulation results. Afterwards we design a suitable laboratory task for bachelor degree students of Teleinformatics.
|
|
|
Optical amplifiers for metropolitan and access networks
Čech, Martin ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
Aim of this Master´s thesis is to describe and compare most common types of optical amplifiers used in today’s networks. The first section focuses on problematic of optical transmissions and phenomenon which cause degradation of transmitted signal. It is also explained in this section why there is a need to deploy optical amplifiers. Next section describes basic principles, structure and properties of individual types of optical amplifiers. Following section describes simulations which were made to compare the performance of transmission systems with each individual type of optical amplifier. The last section contains a design of optical metropolitan network with wavelength multiplex. Based on simulations from preceding part best amplifier type and optimal amplifier placement was selected. Functionality of the design was tested and simulations described in final section.
|
|
|
A new security model implemented in the metropolitan network
Dančuk, Michal ; Kyselák, Martin (referee) ; Škorpil, Vladislav (advisor)
This diploma thesis deals with wireless computer networks in a point of view security. It contains security principles and standards used in these networks. It shows failings of old security methods in contras of new standards. The result of the thesis is a design of the metropolitan network and its realization. In this network appropriate solutions of security are used. The last part of the thesis deals with a design of web applications created in the PHP programming language and SQL database system.
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