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Effective utilization of converged network
Nesveda, Marek ; Vychodil, Petr (referee) ; Škorpil, Vladislav (advisor)
The Master´s thesis deals with the field of converged networks and their effective utilization, focusing specifically on telematic networks. For modelling of a specific application, the field of vehicle telematics has been chosen. The thesis consists of two series of simulations performed in Opnet Modeler network simulator. The first theoretic part gave an overview of protocols used in converged networks, with a more detailed description of routing protocols. The attention also centred on the mechanisms for assuring the quality of service in IP. The subsequent practical part consisted in creating the simulation of a converged telematic network in Opnet Modeler network simulator, configuration of scenarios for assuring QoS using RSVP and DSCP protocols and the simulation itself. The results of the simulations for both scenarios were compared and represented in graphic form. The second theoretic part described queueing disciplines, as well as congestion control and congestion avoidance mechanisms. The corresponding practical part compared FIFO, PQ and WFQ queueing algorithms within the same simulated converged telematic network, using DSCP protocol scenario, which gave much better results in the first series of simulations. Again, the results of the simulations were compared and represented in graphic form.
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Data-flow Control on Transport Layer
Pánek, Michal ; Komosný, Dan (referee) ; Koton, Jaroslav (advisor)
In order to easily send data between two end elements without congestion, methods that suitably control flow of date and evaluate possible overload state are necessary. One such method is to control the data flow directly on the transport layer. This layer offers a range of mechanisms dedicated to deal with this issue. The aim of this paper is divided into three parts. The first part describes the integration of transport layer TCP/IP model, and the ability to process TCP data stream. The second part describes methods to manage congestion, their integration by usage environment. It mainly focuses on methods of TCP Reno and TCP Vegas. Their simulation and analysis on transmission the data stream stream. The third part deals with the analysis in detail of TCP Vegas. Analyzes possible parameters for alpha a beta within the TCP Vegas, and a combination of TCP Vegas and TCP Reno.
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Towards More Effective Flow Allocation in RINA
Koutenský, Michal ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
This master's thesis focuses on design and implementation of a flow allocator policy which supports bandwidth reservation for the Recursive InterNetwork Architecture (RINA). Each flow has some dedicated bandwidth, which is guaranteed to be available during the whole lifetime of the flow. The allocator, which operates as a distributed system, attempts to find a suitable path in the network graph. To achieve this goal, it must keep the information about link utilization up to date. The proposed allocator has been implemented in the open source project rlite. The first half of the thesis is concerned with congestion control theory, and also studies a number of algorithms used in TCP. Additionally, it contains an overview of the structure of RINA and the Raft consensus algorithm.
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Development trends of TCP for high-speed networks
Modlitba, Jan ; Molnár, Karol (referee) ; Vyoral, Josef (advisor)
The master's thesis solve the problem of setting new TCP variants for high-speed IP networks. The first goal was to describe in detail the behaviour of TCP and then analyse a problem of utilization the available bandwidth with standard TCP in high-speed network. Work consequently deals with selection and description the most perspective ones. Further the reader is familiarized with reasonable simulation tools of existing problems and their brief description. Main part of this thesis presents examination of performance of new TCP variants for high-speed network. During the examination the aspects on efficiency and fairness of competition flows on shared bottleneck are taken. The results are tabularly displayed plus compared with each other.
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Towards More Effective Flow Allocation in RINA
Koutenský, Michal ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
This master's thesis focuses on design and implementation of a flow allocator policy which supports bandwidth reservation for the Recursive InterNetwork Architecture (RINA). Each flow has some dedicated bandwidth, which is guaranteed to be available during the whole lifetime of the flow. The allocator, which operates as a distributed system, attempts to find a suitable path in the network graph. To achieve this goal, it must keep the information about link utilization up to date. The proposed allocator has been implemented in the open source project rlite. The first half of the thesis is concerned with congestion control theory, and also studies a number of algorithms used in TCP. Additionally, it contains an overview of the structure of RINA and the Raft consensus algorithm.
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Data-flow Control on Transport Layer
Pánek, Michal ; Komosný, Dan (referee) ; Koton, Jaroslav (advisor)
In order to easily send data between two end elements without congestion, methods that suitably control flow of date and evaluate possible overload state are necessary. One such method is to control the data flow directly on the transport layer. This layer offers a range of mechanisms dedicated to deal with this issue. The aim of this paper is divided into three parts. The first part describes the integration of transport layer TCP/IP model, and the ability to process TCP data stream. The second part describes methods to manage congestion, their integration by usage environment. It mainly focuses on methods of TCP Reno and TCP Vegas. Their simulation and analysis on transmission the data stream stream. The third part deals with the analysis in detail of TCP Vegas. Analyzes possible parameters for alpha a beta within the TCP Vegas, and a combination of TCP Vegas and TCP Reno.
|
|
|
Effective utilization of converged network
Nesveda, Marek ; Vychodil, Petr (referee) ; Škorpil, Vladislav (advisor)
The Master´s thesis deals with the field of converged networks and their effective utilization, focusing specifically on telematic networks. For modelling of a specific application, the field of vehicle telematics has been chosen. The thesis consists of two series of simulations performed in Opnet Modeler network simulator. The first theoretic part gave an overview of protocols used in converged networks, with a more detailed description of routing protocols. The attention also centred on the mechanisms for assuring the quality of service in IP. The subsequent practical part consisted in creating the simulation of a converged telematic network in Opnet Modeler network simulator, configuration of scenarios for assuring QoS using RSVP and DSCP protocols and the simulation itself. The results of the simulations for both scenarios were compared and represented in graphic form. The second theoretic part described queueing disciplines, as well as congestion control and congestion avoidance mechanisms. The corresponding practical part compared FIFO, PQ and WFQ queueing algorithms within the same simulated converged telematic network, using DSCP protocol scenario, which gave much better results in the first series of simulations. Again, the results of the simulations were compared and represented in graphic form.
|
|
|
Development trends of TCP for high-speed networks
Modlitba, Jan ; Molnár, Karol (referee) ; Vyoral, Josef (advisor)
The master's thesis solve the problem of setting new TCP variants for high-speed IP networks. The first goal was to describe in detail the behaviour of TCP and then analyse a problem of utilization the available bandwidth with standard TCP in high-speed network. Work consequently deals with selection and description the most perspective ones. Further the reader is familiarized with reasonable simulation tools of existing problems and their brief description. Main part of this thesis presents examination of performance of new TCP variants for high-speed network. During the examination the aspects on efficiency and fairness of competition flows on shared bottleneck are taken. The results are tabularly displayed plus compared with each other.
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TCP Vegas Algorithm for Controlling Throughput at the Transport Layer
Pánek, M.
In order to easily send data between two end elements without congestion, methods that suitably control flow of date and evaluate possible overload state are necessary. One such method is to control the data flow directly on the transport layer. This layer offers a range of mechanisms dedicated to deal with this issue. The aim of this paper is focused on TCP Vegas for its ability to shape the data flow and the advantages and disadvantages of its use in the network. The paper also shows the behavior of two parallel data streams using TCP Vegas.
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