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Quality of service support in unix-like operating system for communication in WiFi networks
Mizera, Josef ; Komosný, Dan (referee) ; Novotný, Vít (advisor)
Diploma thesis is focused on the supporting of Quality of Services in wireless networks, especially in the Linux operation systems. The topic is connected not only with OS, but also with the wireless standard, which supports QoS in wireless networks called IEEE 802.11e. QoS is needed especially for time-consuming data transfers in real time. The theoretical part deals with the theoretical analysis of the issue of the QoS support. There are described parameters, which occurred in quality of services support. This section also deals with the division of services that are used to transmit data across computer networks. It also describes the QoS support in wireless networks according 802.11e, its implementation and methods of accessing a medium with a without possibility of traffic. This part is followed by a description of QoS support in UNIX operating systems. The chapter describes how is the QoS support designed in these operating systems. There are also characterized concrete tools which are used for control the data flow in the operating systems using Linux. At the end the theoretical part deals with different types of queues and methods used in linux OS. In the practical part of the thesis, there are various designed topologies and scenarios to verify the functionality of QoS support in wireless networks using a Unix system. These chapters show the results of different tests at selected transmission data streams that are sensitive to transmission time. There is also verified cooperation of QoS support between devices operating on the network and data link layers. The output of this work is to design a laboratory exercise for the subject Network Architecture. This exercise is focused on familiarization with the QoS support functionality in wireless networks and in Unix-like operating systems. This chapter also describes the devices and programs that are needed to measure this task. The last part of the chapter describes the procedure for the preparation of the measuring station. For this laboratory task, there is an inserted manual in the annex.
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Wireless sensor networks for environmental monitoring
Mizera, Josef ; Červenka, Vladimír (referee) ; Morávek, Patrik (advisor)
his work is focused on usability of wireless sensor networks for monitoring environment. Wireless sensor networks are used more and more for this purposes. This technology has great advantages in comparison with cable networks, mainly in difficulty of their realization. This work contains a description of wireless sensor networks, norms and specifications used for these networks. Requirements on software processing data from sensors and how the signal is distributed. There are examples of applications where wireless networks are used. The reasons why these networks began to be used and in what way they eased the work in such area or problems that are solved by these networks. In the last part of my work is a design of application for monitoring of forest fires in area of Komonec by using wireless sensor networks where it should be beneficial.
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Service quality support in WLAN networks
Mizera, Josef ; Hošek, Jiří (referee) ; Novotný, Vít (advisor)
The bachelor´s thesis is focused on wireless networks WiFi and the transmission of multimedia using these networks. It discusses the connection of telecommunication and data networks, their common use for transfer of data in real time, particularly through wireless transmission medium using standards IEEE 802.11. It describes individual standards 802.11, mainly 802.11e on which is this bachelor´s thesis focused. The second part of the work is focused on designing the networks for measuring to verify the functionality of service quality support in the tested networks.
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Wireless sensor networks for environmental monitoring
Mizera, Josef ; Červenka, Vladimír (referee) ; Morávek, Patrik (advisor)
his work is focused on usability of wireless sensor networks for monitoring environment. Wireless sensor networks are used more and more for this purposes. This technology has great advantages in comparison with cable networks, mainly in difficulty of their realization. This work contains a description of wireless sensor networks, norms and specifications used for these networks. Requirements on software processing data from sensors and how the signal is distributed. There are examples of applications where wireless networks are used. The reasons why these networks began to be used and in what way they eased the work in such area or problems that are solved by these networks. In the last part of my work is a design of application for monitoring of forest fires in area of Komonec by using wireless sensor networks where it should be beneficial.
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Service quality support in WLAN networks
Mizera, Josef ; Hošek, Jiří (referee) ; Novotný, Vít (advisor)
The bachelor´s thesis is focused on wireless networks WiFi and the transmission of multimedia using these networks. It discusses the connection of telecommunication and data networks, their common use for transfer of data in real time, particularly through wireless transmission medium using standards IEEE 802.11. It describes individual standards 802.11, mainly 802.11e on which is this bachelor´s thesis focused. The second part of the work is focused on designing the networks for measuring to verify the functionality of service quality support in the tested networks.
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|
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Quality of service support in unix-like operating system for communication in WiFi networks
Mizera, Josef ; Komosný, Dan (referee) ; Novotný, Vít (advisor)
Diploma thesis is focused on the supporting of Quality of Services in wireless networks, especially in the Linux operation systems. The topic is connected not only with OS, but also with the wireless standard, which supports QoS in wireless networks called IEEE 802.11e. QoS is needed especially for time-consuming data transfers in real time. The theoretical part deals with the theoretical analysis of the issue of the QoS support. There are described parameters, which occurred in quality of services support. This section also deals with the division of services that are used to transmit data across computer networks. It also describes the QoS support in wireless networks according 802.11e, its implementation and methods of accessing a medium with a without possibility of traffic. This part is followed by a description of QoS support in UNIX operating systems. The chapter describes how is the QoS support designed in these operating systems. There are also characterized concrete tools which are used for control the data flow in the operating systems using Linux. At the end the theoretical part deals with different types of queues and methods used in linux OS. In the practical part of the thesis, there are various designed topologies and scenarios to verify the functionality of QoS support in wireless networks using a Unix system. These chapters show the results of different tests at selected transmission data streams that are sensitive to transmission time. There is also verified cooperation of QoS support between devices operating on the network and data link layers. The output of this work is to design a laboratory exercise for the subject Network Architecture. This exercise is focused on familiarization with the QoS support functionality in wireless networks and in Unix-like operating systems. This chapter also describes the devices and programs that are needed to measure this task. The last part of the chapter describes the procedure for the preparation of the measuring station. For this laboratory task, there is an inserted manual in the annex.
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