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Simulation of network element in Matlab environment
Kuchár, Peter ; Vymazal, Michal (oponent) ; Vychodil, Petr (vedoucí práce)
Master’s thesis is dedicated to the issue of network element. In the first part are described technological aspects as the internal structure of network elements and control mechanisms that provide differentiaton of services and support their quality requirements. In the first chapter are listed control mechanisms from most simple like FIFO to the more sophisticated like CBWFQ. Active queue managements are not missing and they are described in the section Riadiaci člen. Significant role in the differentiation of services have processes marking and pakets classification. The second chapter is devoted most promising standard DiffServ. Contains section devoted to architecture, paket marking, code point DSCP and the final part is devoted to the types of per-hop behavior and it is expedited forwarding EF and technique assured forwarding AF. The third chapter gives an overview common models of neural networks, their properties and assess their suitability for deployment in network elements. The routher design itself and its structure in programming environment Matlab/Simulink is the subject of the fourth chapter. Except used bloks from Simulink library is described their setting and function in the wiring. Consequently results are reviewied and conclusions drawn.
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Plánovač síťového provozu pro diferencované služby
Bali, Michal ; Kratochvíl, Miroslav (vedoucí práce) ; Matěna, Vladimír (oponent)
Diferenciácia služieb, teda schopnosť mechanizmov zabezpečovania kva- lity služby (QoS) spĺňať rôzne požiadavky rôznych typov prenosu po sieti, je dôležitou súčasťou poskytovania internetových služieb. Bežné metódy zle- pšovania kvality diferencovaných služieb vyžadujú centralizované plánovače sieťovej prevádzky, ktoré v sieťach typických ISP nemôžu reagovať na poru- chy. V tejto práci opisujeme, implementujeme a meriame výkon plánovača sieťovej prevádzky, ktorý je dostatočne jednoduchý na to, aby bol umiest- nený v kritických miestach siete, kde môže presne reagovať na vzniknuté problémy v sieti; súčasne podporuje viacúrovňové stochastické plánovanie sieťovej prevádzky, ktoré zaručuje istú úroveň spravodlivosti v sieti a diferen- ciácie služieb. Návrh je inšpirovaný predchádzajúcim výskumom v oblasti - kombinuje idey CoDelu a SFQ. Výsledný návrh plánovača sieťovej prevádzky, nazvaný Multilevel Sto- chastically Fair CoDel (MSFC), implementujeme v sieťovom simulátore ns-3. Simulácie na sieti podobnej infraštruktúre ISP vykazujú v porovnaní s inými necentralizovanými plánovačmi zlepšenie kvality diferencovaných služieb.
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Simulation of network element in Matlab environment
Kuchár, Peter ; Vymazal, Michal (oponent) ; Vychodil, Petr (vedoucí práce)
Master’s thesis is dedicated to the issue of network element. In the first part are described technological aspects as the internal structure of network elements and control mechanisms that provide differentiaton of services and support their quality requirements. In the first chapter are listed control mechanisms from most simple like FIFO to the more sophisticated like CBWFQ. Active queue managements are not missing and they are described in the section Riadiaci člen. Significant role in the differentiation of services have processes marking and pakets classification. The second chapter is devoted most promising standard DiffServ. Contains section devoted to architecture, paket marking, code point DSCP and the final part is devoted to the types of per-hop behavior and it is expedited forwarding EF and technique assured forwarding AF. The third chapter gives an overview common models of neural networks, their properties and assess their suitability for deployment in network elements. The routher design itself and its structure in programming environment Matlab/Simulink is the subject of the fourth chapter. Except used bloks from Simulink library is described their setting and function in the wiring. Consequently results are reviewied and conclusions drawn.
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