Global ETD Search

191	Impact Of Transmission Patterns On One-Way Delay In 3G Networks Of Sweden Krishna, Vamsi, Dasari, Praveen January 2012 (has links) Over the last few years, there has been a signifi cant rise in the mobile broadband users worldwide. Recently, operators around the world have been improving the 3G networks by providing Dual Carrier-High Speed Packet Access+ (DC-HSPA+) services in both uplink and downlink to the users. However, the delay performance of the operational DC-HSPA+ networks is not focused. Firstly, we investigate and analyze the e ffect of operator service on One-Way Delay (OWD) and Jitter. Secondly, we investigate the treatment of protocols by 3G network for random packet sizes and random Inter Packet Duration (IPD). Thirdly, we investigate the eff ect of background load on OWD for packets generated at very low rate. Fourthly, we investigate the impact of constant IPD and streaming. Fifthly, we investigate the effects of shrinking the interval of IPD on OWD in 3G networks. Lastly, we investigate the OWD for Constant-Bit-Rate (CBR) and Variable-Bit-Rate (VBR) transmission patterns. Firstly, results show that OWD in the DC-HSPA+ networks is lower compared to the OWD in the preceding HSUPA networks and OWD strongly depends on packet-size at lower rates. Secondly, the 3G networks treat User Datagram Protocol (UDP), Transmission Control Protocol (TCP) and Internet Control Message Protocol (ICMP) protocols similarly for random packet size and random IPD. Thirdly, at high rates OWD depends on E-TFCE-DCH Transport Format Combination (ETFC) grants. Thirdly, the results also indicate that background load has a signi ficant impact on the end-to-end OWD. Fourthly, for low rates, OWD depends on packet sizes and for high rates OWD depends on IPD and for higher rates, OWD depends on E-TFC grants. Fifthly, we also observe: Shrinking the interval of IPD does not necessarily improve the OWD performance. Lastly, results also indicate that the VBR pattern has a better OWD performance than the CBR pattern for low transmission rates. Downlink DC-HSPA+ E-TFCI HSPA ICMP Mobile broadband One-way Delay TCP UDP Uplink 3G Computer Sciences Datavetenskap (datalogi) Telecommunications Telekommunikation Elektroteknik och elektronik
192	Rozpoznávaní aplikací v síťovém provozu / Network-Based Application Recognition Štourač, Jan January 2014 (has links) This thesis introduces readers various methods that are currently used for detection of network-based applications. Further part deals with selection of appropriate detection method and implementation of proof-of-concept script, including testing its reliability and accuracy. Chosen detection algorithm is based on statistics data from network flows of tested network communication. Due to its final solution does not depend on whether communication is encrypted or not. Next part contains several possible variants of how to integrate proposed solution in the current architecture of the existing product Kernun UTM --- which is firewall produced by Trusted Network Solutions a.s. company. Most suitable variant is chosen and described furthermore in more details. Finally there is also mentioned plan for further developement and possible ways how to improve final solution.
193	Speciální aplikace VoIP / Special application of VoIP Lembard, Tomáš January 2011 (has links) The aim of this master's thesis is suggestion and following realization of voice transmission over the local network equipment and a description of used circuits and solutions in terms of hardware and software. This thesis deals with digitization of low-frequency signals, the structure of IP and UDP protocols, implementation of TCP/IP stack cIPS
194	Implementace ethernetového komunikačního rozhraní do obvodu FPGA / Implementation of ethernet communication inteface into FPGA chip Skibik, Petr January 2011 (has links) The thesis deals with the implementation of Ethernet-based network communication interface into FPGA chip. VHDL programming language is used for description of the hardware. The interface includes the implementation of link-layer Ethernet protocol and network protocols such as IPv4, ARP, ICMP and UDP. The final design allows bi-directional communication on the transport-layer level of TCP/IP model. The designed interface was implemented into Virtex5 FPGA chip on development board ML506 by Xilinx.
195	Akviziční jednotka pro zabezpečovací techniku / Acquisition Unit for Security System Pejchal, Luboš January 2012 (has links) Project is focused to development of security unit for security of homes, flats and other similar spaces against intruders (thieves). Design is focused to solution of hardware and firmware for security units and their control software for PC. Hardware design solve supply over ethernet PoE, backup of supply, connection securities sensors to security unit. Firmware prevents failure of units and it is communicating with sensors and PC. Software in PC provides settings of security units, deactivating of alarm and measure temperature by security unit.
196	Soubor laboratorních úloh k demonstraci počítačových útoků / Collection of laboratory works for demonstration of computer attacks Plašil, Matouš January 2015 (has links) Diploma thesis describes published attacks on computers and computer networks. Principles of footprinting such as availability check, OS detection, port scanning were described. Next part explains attacks on confidentiality, integrity and availability. In the practical part were created four laboratory tasks and a virtual environment which allowed testing of ARP spoofing, DNS spoofing, SSL strip, Cross-site scripting, SQL injection, flooding attacks (TCP, ICMP, UDP), TCP reset and attack on operating system using backdoor with Metasploit framework. In practical part were also created video samples with attacks and documentation for teachers.
197	Vibrační generátor pro zkoušky elektroniky / Recoil forces measurement after shotaVibration Test Stand Rozum, Stanislav January 2017 (has links) The thesis describes design and construction of vibration generator driver. The device is controlled via standard Ethernet interface and allows user to change parameters of generated function in PC application which reads and evaluates frequency and amplitude from real-time measured data while the test is running. In the introduction, vibration tests and choice of generators and power amplifiers are described. Next part is focused on every aspect of the hardware design. Last two chapters implement firmware for all three microcontrollers and software for PC application.
198	Entwicklung des Kommunikationsteilsystems für ein objektorientiertes, verteiltes Betriebssystem 09 November 1998 (has links) Thema dieser Arbeit ist die Entwicklung eines Kommunikationsteilsystems fuer das Experimentiersystem CHEOPS zur Ermoeglichung einer Interobjektkommunika- tion zwischen Objekten auf dem gleichen bzw. verschiedenen Systemen. Ausgangspunkte stellen dabei eine verfuegbare Implementation eines Ethernet- Treibers der Kartenfamilie WD80x3 fuer MS-DOS, eine geforderte Kommunikations- moeglichkeit mit UNIX-Prozessen sowie die dort benutzbaren Protokoll-Familien dar. Die Arbeit beschaeftigt sich mit der Analyse und Konzipierung des Ethernet- Treibers sowie der Internet-Protokoll-Familie fuer CHEOPS als auch deren Implementation resultierend in einem minimalen Grundsystem. Weiterhin wird ein erster Entwurf fuer ein spaeter weiterzuentwickelndes bzw. zu vervoll- staendigendes Netz-Interface vorgeschlagen und durch eine Beispiel-Implemen- tierung belegt. info:eu-repo/classification/ddc/004 ddc:004 ARP; Address Resolution Protocol; CHEOPS; Ethernet Device; Ethernet Treiber; Ethernet; ICMP; IP-Defragmentier-Algorithmus; IP-Routing-Algorithmus; IP; IPv4; Internet Control Message Protocol; Internet Protocol Version 4; Internet Protocol; Internet Protokoll; Interobjektkommunikation; Loopback Device; Loopback Treiber; Loopback; Massage basiertes Internet Protokoll; Message basierte Kommunikation; Message; Multi-Threaded ARP; Multi-Threaded Ethernet Treiber; Multi-Threaded ICMP; Multi-Threaded IP; Multi-Threaded Loopback Treiber; Multi-Threaded UDP; OOP; Objektorientierte Programmierung; Objektorientierter Ethernet Treiber; Objektorientierter Loopback Treiber; Objektorientiertes ARP; Objektorientiertes ICMP; Objektorientiertes IP; Objektorientiertes Netzwerk-Interface; Objektorientiertes UDP; UDP; User Datagram Protocol; multithreaded ARP; multithreaded ICMP; multithreaded IP; multithreaded UDP; multithreaded ethernet device driver; multithreaded loopback device driver;
199	Systém pro řízení intenzity osvětlení / Intelligent lightning system Harman, Ján January 2011 (has links) The aim of my master’s thesis is a system for control of the light intensity. It is electronic equipment which controls the intensity of the light circuits based on settings and input signals. This equipment could work on single-phase systems or multiphase systems. The equipment is controlled by the signal DMX-512 which is a standard for the control of lighting technologies. The set up of this equipment is based on a personal computer or in a limited form by a small connected display.

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