Národní úložiště šedé literatury Nalezeno 27 záznamů.  předchozí11 - 20další  přejít na záznam: Hledání trvalo 0.01 vteřin. 
Simulation of routing protocols in ns3 simulation environment
Masár, Marek ; Hošek, Jiří (oponent) ; Vajsar, Pavel (vedoucí práce)
The first part of thesis is about networks that are divided based on area. It includes also basic characteristic of Manet networks. The next chapter is about distribution of routing protocols into preactive, reactive, hybrid. In the simulation, there is comparison of 3 routing protocols, which are described in this chapter. The simulation is performed in program called Ns-3, more specifically in version 3.14. In the third chapter, this network simulator is described more closely. Here is also mentioned its continuity on previous version Ns-2. The goal of this simulation is to create a network with implemented routing protocols and with certain number of nodes, which has configured mobility, so the network looks like Manet network as much as possible. There are also 2 applications created, which were used to determine the delay for each routing protocol. Another part of thesis is about implementation of the quality of service (QoS) and energy model for each routing protocol. Energy model was used to calculate the remaining energy of node. Next activity summarizes how the implementation of QoS changed delay for used applications and how it changed the energy consumption of a node. The result of thesis is that the voice applications was preferred after the QoS implementation. The value of delay increased for ftp application. Percentually, the improvement for voice traffic was 30-31 %. The increase of delay was percentually 7-19 %. The difference in remaining energy after QoS implementation was about 1%. The actual amount of battery in the beginning of simulation was 1 J.
Ad hoc On-Demand Distance Vector routing optimization
Miško, Lukáš ; Koton, Jaroslav (oponent) ; Kubánková, Anna (vedoucí práce)
This thesis contains a theoretical basis for MANET networks. The main focus of the thesis is principles of these networks, their routing protocols and especially on Ad hoc On-Demand Distance Vector (AODV), implementation of this protocol and implementation of new mechanis for peer selection. Thesis contains ETX metric basic and implementation of this metric to AODV protocol. There is a demonstration of simulation of AODV protocol and simulation of AODV-ETX protocol. Simulations are run in Network Simulator 3. AODV and AODV-ETX comparasion are included in thesis.
Analýza a predikce datového provozu v mobilní ad hoc síti
Konečný, Daniel ; Koutný, Martin (oponent) ; Hošek, Jiří (vedoucí práce)
Diplomová práce „Analýza a predikce datového provozu v mobilní ad hoc síti“ se zabývá problematikou rádiových modelů ztráty signálu v MANET (Mobile Ad Hoc) sítích. V této diplomové práci je proveden popis MANET sítí, teoretický rozbor směrovacích protokolů, šíření rádiových vln a modelů ztráty signálu v simulačním prostředí NS-3 (Network Simulator 3). Dále je zde zpracován postup tvorby modelu MANET sítě s podporou směrovacího protokolu AODV (Ad Hoc On Demand Distance Vector) v simulačním prostředí NS-3. Pro analýzu simulací byly vytvořeny nové funkce vyčítání hodnot SNR (Signal to Noise Ratio) a propustnosti. Pro tyto účely byla upravena fyzická vrstva jednoho z modelů NS-3. Výsledkem je simulace jenž porovnává velkého množství modelů ztráty signálu.
Ad hoc On-Demand Distance Vector routing optimization
Miško, Lukáš ; Koton, Jaroslav (oponent) ; Kubánková, Anna (vedoucí práce)
This thesis contains a theoretical basis for MANET networks. The main focus of the thesis is principles of these networks, their routing protocols and especially on Ad hoc On-Demand Distance Vector (AODV), implementation of this protocol and implementation of new mechanis for peer selection. Thesis contains ETX metric basic and implementation of this metric to AODV protocol. There is a demonstration of simulation of AODV protocol and simulation of AODV-ETX protocol. Simulations are run in Network Simulator 3. AODV and AODV-ETX comparasion are included in thesis.
Ad Hoc Network Scenarios and Different Types of Attacks
Rexa, Denis ; Kenyeres, Martin (oponent) ; Škorpil, Vladislav (vedoucí práce)
In this semester thesis dedicated to MANET networks and security threats are compared the routing protocols AODV vs OLSR vs ZRP. Next chapter is dealing with a broadcast storm and discussed in more detail basic types of attacks in MANET networks with proposals to suppress the impact on the functioning of the network. In the next chapter, it is shown and described an environment of NS-3 simulator with that program and simple way how to reach the information. The last chapter shows the influence of black-hole attack on the network, and a proposal for its elimination.
Analýza směrovacích protokolů používaných v MANET sítích
Vala, Ondřej ; Hošek, Jiří (oponent) ; Kubánková, Anna (vedoucí práce)
Tato diplomová práce se zabývá analýzou směrovacích protokolů používaných v MANET sítích se zaměřením na protokoly OLSR, AODV a HWMP. Práce se skládá z teoretické části, kde jsou popsány směrovací protokoly, které se používají v MANET sítích a jejich aplikování v sítích FANET. V praktické části práce jsou rozebrány vytvořené modely mobility, které jsou použity pro porovnání směrovacích protokolů pomoci vytvořených scénářů mobility podle kvalitativních parametrů sítě.
Ad Hoc Network Scenarios and Different Types of Attacks
Rexa, Denis ; Kenyeres, Martin (oponent) ; Škorpil, Vladislav (vedoucí práce)
In this semester thesis dedicated to MANET networks and security threats are compared the routing protocols AODV vs OLSR vs ZRP. Next chapter is dealing with a broadcast storm and discussed in more detail basic types of attacks in MANET networks with proposals to suppress the impact on the functioning of the network. In the next chapter, it is shown and described an environment of NS-3 simulator with that program and simple way how to reach the information. The last chapter shows the influence of black-hole attack on the network, and a proposal for its elimination.
Ad Hoc Network Scenarios and Different Types of Attacks
Rexa, Denis ; Kenyeres, Martin (oponent) ; Škorpil, Vladislav (vedoucí práce)
In this semester thesis dedicated to MANET networks and security threats are compared the routing protocols AODV vs OLSR vs ZRP. Next chapter is dealing with a broadcast storm and discussed in more detail basic types of attacks in MANET networks with proposals to suppress the impact on the functioning of the network. In the next chapter, it is shown and described an environment of NS-3 simulator with that program and simple way how to reach the information. The last chapter shows the influence of black-hole attack on the network, and a proposal for its elimination.
Experimental MANET network in NS-3 simulator
Vadkerti, Gabriel ; Langhammer, Lukáš (oponent) ; Bartl, Milan (vedoucí práce)
This thesis deals with the problem of MANET networks. It presents routing protocols, their types, advantages and disadvantages. The protocols, such as AODV and OSPF, are analyzed in detail. The next section describes the NS-3 simulator and the meaning of its key codes. There are named and explained the most common mobility models and their correct writing into the source code. A MANET network simulation is created and a program for indicating the routes of packets through the network is introduced. The next describes traffic models for data networks. A simple traffic model for NS-3 and a program for graphic representation of this traffic were created. The DCE module for NS-3 is introduced in the last section and a demonstrational program of using Linux stack is created.
Simulation of routing protocols in ns3 simulation environment
Masár, Marek ; Hošek, Jiří (oponent) ; Vajsar, Pavel (vedoucí práce)
The first part of thesis is about networks that are divided based on area. It includes also basic characteristic of Manet networks. The next chapter is about distribution of routing protocols into preactive, reactive, hybrid. In the simulation, there is comparison of 3 routing protocols, which are described in this chapter. The simulation is performed in program called Ns-3, more specifically in version 3.14. In the third chapter, this network simulator is described more closely. Here is also mentioned its continuity on previous version Ns-2. The goal of this simulation is to create a network with implemented routing protocols and with certain number of nodes, which has configured mobility, so the network looks like Manet network as much as possible. There are also 2 applications created, which were used to determine the delay for each routing protocol. Another part of thesis is about implementation of the quality of service (QoS) and energy model for each routing protocol. Energy model was used to calculate the remaining energy of node. Next activity summarizes how the implementation of QoS changed delay for used applications and how it changed the energy consumption of a node. The result of thesis is that the voice applications was preferred after the QoS implementation. The value of delay increased for ftp application. Percentually, the improvement for voice traffic was 30-31 %. The increase of delay was percentually 7-19 %. The difference in remaining energy after QoS implementation was about 1%. The actual amount of battery in the beginning of simulation was 1 J.

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