Dissertations / Theses: 'Router'

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Morselli, Filippo. "Routex: un Router Multitecnologia per Internet of Things." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11889/.

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L'Internet of Things (IoT) è oggetto di grande interesse per la ricerca e per l'industria. Le numerose tecnologie che sono state sviluppate rendono possibile la creazione di nuovi e utili servizi, ma introducono problemi legati alla reciproca incompatibilità. Nell'elaborato si analizza nel dettaglio questa situazione e si descrive l'implementazione di un sistema che ha come obiettivo la realizzazione di una rete composta da dispositivi che fanno uso di tecnologie differenti. Il progetto usa un Raspberry Pi come router, il cui scopo è quello di gestire le differenze fra gli standard di comunicazione utilizzati. Le tecnologie wireless supportate sono: WiFi, Bluetooth, ZigBee, nRF24L01 e moduli radio 433MHz. Sulla rete cosi formata è inoltre possibile lo sviluppo di applicazioni IoT, grazie alle logiche di funzionamento messe a disposizione dal sistema.

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BANTAN, NOUMAN. "A ROUTING PROTOCOL AND ROUTING ALGORITHM FOR SPACE COMMUNICATION." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1172099125.

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Doody, Aaron L. (Aaron Lee). "CNC router modernization." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40405.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
Includes bibliographical references.
A large-format CNC router has been stored in the Pappalardo Laboratory wood shop for several years in an unusable state. A need assessment determined that it would be cost effective to bring the router online for use in the mechanical engineering curriculum. The router was cleaned and inspected; it was determined that the router was in sound mechanical condition. The stepper motors, control system, and power supply were also functional, but the CNC interface software was outdated. To ensure the long term viability of the router as an effective teaching tool the most cost effective solution was to upgrade the motors, control system, and CNC interface software using a package provided by the original supplier, Techno-Isel Inc. The motors, control system, and software were installed, bringing the router to a fully functional state. Dust and ejected cuttings cause a safety hazard and cleanliness problem when operating the router. An enclosure was designed and installed in order to trap the majority of debris and reduce noise levels in the workspace, and a brief user guide has been compiled to ensure safe and effective usage.
by Aaron L. Doody.
S.B.

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Gao, Xiaojie Schulman Leonard J. "Router congestion control /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-06142004-161237.

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Karamanos, Emmanouil. "Investigation of home router security." Thesis, KTH, Kommunikationssystem, CoS, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91107.

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Home routers are common in every household that has some kind of Internet connectivity. These embedded devices are running services such as web, file and DHCP server. Even though they have the same security issues as regular computers, they do no run protection software such as anti-virus and they are not updated. Moreover, the importance of these devices is misjudged; all network traffic is passing through them and they control the DNS of the network while, in most cases, they are on-line around the clock. When more and more non-Internet features are implemented into home routers, such as Voice over IP and network storage, their role becomes more special and many security concerns are raising. In this thesis, we investigate the issues resulting from this special role; the importance for these devices to be secure, the attacking vector and how the devices can be compromised to be part of a large home router botnet. We conclude by proposing ways to make the current implementation more secure, suggesting ways to protect routers from botnets without user interaction, that is from the ISP, while respecting the privacy of the end user and we identify what future work needs to be done.
Router är vanliga i hem som har någon slags Internet anslutning. De här inbyggda enheter kör tjänster som t.ex. web, file och DHCP basenheter. Fastän de har samma säkerhetsfrågor som vanliga datorer, så kan de inte använda säkerhets mjukvara som t.ex anti-virus och de är inte uppdaterade. Dessutom har betydelsen av de här apparaterna blivit felbedömmat; hela nätverket passerar genom dem och de kontrolerar nätverkets DNS medan, i de flesta fall, de är on-line dygnet runt. Men, när mer och mer icke-Internet lockvaror fars in i routern, som t.ex Voice över IP och nätverkslagring, blir deras roll viktigare och oron för säkerheten växer. I den här avhandlingen utforskars problemen och frågorna som efterföljer deras speciella roll, hur viktigt det är att de här apparaterna är skyddade, (the attacking vector) och hur de här apparaterna kan bli jämkningad för att bli en del av ett stort router botnet. Vi avsluter med att lägga fram sätt att göra det nuvarande verktyget mer skyddat, föreslå sätt att skydda routern från botnet utan användarinteraktion, som kommer från ISP, medan man respekterar det andra användarens privtaliv och markera vad som behövs ändras i framtiden.

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Sers, Rickard, and Victor Wiberg. "Konstruktion av CNC-Router." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-23611.

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AASS (Applied Autonomous Sensor Systems, Centrum för Tillämpade Autonoma Sensorsystem) arbetar med forskning inom autonoma system. Deras stora användningsområden är utveckling av automatiska system till fordonsindustrin samt system till äldrevården. AASS, har ett önskemål om en enklare modell av en CNC fräs för enklare fräsning till bland annat prototyptillverkning. Fokus ska ligga på kostnaden då precisionen inte är av största intresse. Uppdraget innebär att ta fram en konstruktion av en cnc- router med tre axlar med ett arbetsrum på 600x450x150mm. Maskinen ska kunna skära i mjuka material som trä, plaster men även mjukare aluminium. Resultatet är en tre axlig cnc- router som drivs av tre stycken stepmotorer som är kopplade till respektive kulskruv. Cnc routern har ett arbetsrum på cirka 600x450x150mm. Den klarar av skärkrafter på 150N utan att deformationer kommer ge stora felaktiga värden på bearbetad detalj. Konstruktionen består till huvuddel av aluminiumprofiler som finns tillängliga på Örebro universitet. De rörliga delarna består av Quadro Tables som tillverkas av Rollco. Konstruktionen ger en bra lösning till en relativt låg kostnad.
AASS (Applied Autonomous Sensor Systems, Center for Applied Autonomous Sensor) works with research in autonomous systems. Their major application is the development of such systems for the automotive industry as well for the elderly. AASS, have a desire for a simple model of a CNC milling machine for milling smaller parts for prototyping. The focus should be on cost when precision is not of great interest. The mission is to develop a design of a CNC router with three axes with a workspace of 600x450x150mm. The machine should be able to cut soft materials such as wood, plastics as well as soft aluminum. The result is a three-axis CNC router which is driven by three stepper motors which are coupled to respective ball screw. The Cnc router has a workspace of about 600x450x150mm. It is capable of cutting with cutting forces up to 150N without deformations that will produce large errors in values of processed detail. The design consists of main body of aluminum profiles available at Örebro University. The movable parts consist of Quadro Tables manufactured by Rollco. The design provides a good solution to a relatively low cost.

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Hidell, Markus. "Decentralized Modular Router Architectures." Doctoral thesis, Stockholm : Laboratory for Communications Networks, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4090.

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Kohler, Eddie 1973. "The Click modular router." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86585.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2001.
Includes bibliographical references (p. 122-127).
by Eddie Kohler.
Ph.D.

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Aslam, Muhammad Awais. "Router Architecture for Junction Based Source Routing:Design and FPGA Prototyping." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Data- och elektroteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-17231.

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The increase in the number of cores that can be integrated on a single chip has forced the designer to use computer network concepts for design of System on Chip (SoC). This idea led to development of Network on Chip (NoC) to deal with more cores on a single chip. NoC has three main parts, namely routers, link and network interface through which cores are connected to NoC. Router is one of the most important parts because cores communicate with other cores through routers. One of the important tasks for a NoC designer is to design router with low latency.Router design depends on the routing protocol and routing algorithm used. Two kinds of routing algorithms are source routing and distributed routing. In source routing, complete route information is available in Head flit while in distributed routing, routing decisions are taken inside every router on the path. Source routing has speed advantage over distributed routing because the packet itself contains the routing information. But source routing leads to overhead to store complete path information in the header of each packet. To overcome this flaw, junction based source routing has been introduced. If destination is far away from the source then first packet will go to a junction and get the new path information from the junction to the destination. Thus we need to store the path information only for a few hops in the packet header. This idea has been taken from the daily experience of train journey. In this thesis we have developed design of a router for junction based source routing. Main component of simple router includes buffering, header modification and making route decision. Router includes a table called Path Table which stores information about paths from junction to various destinations. JB router also includes, picking up the new path information from Path Table and modify the header by adding new path information.We have developed VHDL designs of two versions of the routers for Junction Based Routing. The delay performance of routers have been analysed through simulation. A simple prototype of the router has also been implemented in Altera FPGA to find out the resource requirements of the new router designs.

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Balakrishnan, Ramasamy. "A greedy algorithm based router." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq37475.pdf.

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Bjurdelius, Andreas, Pierre Bjurdelius, and Alexander Blomqvist. "Automated Router and Switch Backup." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-24548.

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Today's companies are growing in a steady pace, with more and more network devices added to the network it is very important to keep track of and monitor the status of devices. Even though the wireless evolution has come, it all depends on the wired connections to supply a continuous connection to the rest of the world. This thesis explores, tests and informs about creating a functional system that automatically creates backups of configuration files from network devices and how to troubleshoot networking problems and maintain a network to keep it in good shape. Even though many companies have manual backups of router and switch configurations, the possibility to have this part automated should be desired by most companies. It can open up for the administrators in the company to have more time over to help the employees that are experiencing problems at the same time as the automated system eliminates the possible errors that a human can cause. Of course one can see it the other way, that it takes away manual labor for the employees, but it is just a small part of the job yet it is so very important that making this service automated is a good choice for a company. Integrity is proven by the means of backups and by the option to see the difference between the previous backups and the most recent. The three of us have worked as a group to do all tests and to write the documentation. After working with a couple of companies it is clear that well functional backup systems of network devices are not as common as it should be. Companies that do take backups of the network devices often do this manually. When seeing this it makes sense to use a reliable system that uses revision handling so it is easy to see the recent changes made to the devices. The results ended up in a working automated backup system for routers and switches. The automated system is running Debian and connects to all the routers and switches in the network to collect the configuration files with the help of rancid. The thesis also explains the functions of concepts such as disaster recovery and different maintenance models.

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Awad, Ashraf A. "Scalable application-aware router mechanisms." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-04052004-180005/unrestricted/awad%5Fashraf%5Fa%5F200312%5Fphd.pdf.

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Schmid, Stefan. "A component-based active router architecture." Thesis, Lancaster University, 2003. http://eprints.lancs.ac.uk/12227/.

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Sprunt, Alexander D. (Alexander Dalziel) 1977. "A three axis CNC router design." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/77771.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2000.
Includes bibliographical references.
A preliminary design of a low-cost, three-axis, computer numerically controlled (CNC) router was completed with the goal of bringing the advantages of numerically controlled machine tools to the woodshop. To reduce cost, a novel single rail design was employed. The number of custom parts was kept to a minimum and, where necessary, every effort was made to minimize manufacturing cost. The novel features of the design include vacuum clamping, the ability to cut joinery at miter angles from 0* to 90*, and force controlled cutting. Many of the components are used quite aggressively (particularly with regard to stiffness), but the accuracy goal of ±0.005 " in X and Y and +0.010" in Z was met.
by Alexander D. Sprunt.
S.B.

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Peddireddy, Divya. "IP Router Testing, Isolation and Automation." Thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13286.

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Context. Test Automation is a technique followed by the present software development industries to reduce the time and effort invested for manual testing. The process of automating the existing manual tests has now gained popularity in the Telecommunications industry as well. The Telecom industries are looking for ways to improve their existing test methods with automation and express the benefit of introducing test automation. At the same time, the existing methods of testing for throughput calculation in industries involve measurements on a larger timescale, like one second. The possibility to measure the throughput of network elements like routers on smaller timescales gives a better understanding about the forwarding capabilities, resource sharing and traffic isolation in these network devices. Objectives. In this research, we develop a framework for automatically evaluating the performance of routers on multiple timescales, one second, one millisecond and less. The benefit of introducing test automation is expressed in terms of Return on Investment, by comparing the benefit of manual and automated testing. The performance of a physical router, in terms of throughput is measured for varying frame sizes and at multiple timescales. Methods. The method followed for expressing the benefit of test automation is quantitative. At the same time, the methodology followed for evaluating the throughput of a router on multiple timescales is experimental and quantitative, using passive measurements. A framework is developed for automatically conducting the given test, which enables the user to test the performance of network devices with minimum user intervention and with improved accuracy. Results. The results of this thesis work include the benefit of test automation, in terms of Return on Investment when compared to manual testing; followed by the performance of router on multiple timescales. The results indicate that test automation can improve the existing manual testing methods by introducing greater accuracy in testing. The throughput results indicate that the performance of a physical router varies on multiple timescales, like one second and one millisecond. The throughput of the router is evaluated for varying frame sizes. It is observed that the difference in the coefficient of variance at the egress and ingress of the router is more for smaller frame sizes, when compared to larger frame sizes. Also, the difference is more on smaller timescales when compared to larger timescales. Conclusions. This thesis work concludes that the developed test automation framework can be used and extended for automating several test cases at the network layer. The automation framework reduces the execution time and introduces accuracy when compared to manual testing. The benefit of test automation is expressed in terms of Return on Investment. The throughput results are in line with the hypothesis that the performance of a physical router varies on multiple timescales. The performance, in terms of throughput, is expressed using a previously suggested performance metric. It is observed that there is a greater difference in the Coefficient of Variance values (at the egress and ingress of a router) on smaller timescales when compared to larger timescales. This difference is more for smaller frame sizes when compared with larger frame sizes.

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Svantesson, Björn. "Software Defined Networking : Virtual Router Performance." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-13417.

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Virtualization is becoming more and more popular since the hardware that is available today often has theability to run more than just a single machine. The hardware is too powerful in relation to the requirementsof the software that is supposed to run on the hardware, making it inefficient to run too little software ontoo powerful of machines. With virtualization, the ability exists to run a lot of different software on thesame hardware, thereby increasing the efficiency of hardware usage.Virtualization doesn't stop at just virtualizing operating systems or commodity software, but can also beused to virtualize networking components. These networking components include everything from routersto switches and are possible to set up on any kind of virtulized system.When discussing virtualization of networking components, the experssion “Software Defined Networking”is hard to miss. Software Defined Networking is a definition that contains all of these virtualized networkingcomponents and is the expression that should be used when researching further into this subject. There'san increasing interest in these virtualized networking components now in relation to just a few years ago.This is due to company networking becoming much more complex now in relation to the complexity thatcould be found in a network a few years back. More services need to be up inside of the network and a lotof people believe that Software Defined Networking can help in this regard.This thesis aim is to try to find out what kind of differences there are between multiple different softwarerouters. Finding out things like, which one of the routers that offer the highest network speed for the leastamount of hardware cost, are the kind of things that this thesis will be focused on. It will also look at somedifferent aspects of performance that the routers offer in relation to one another in order to try toestablish if there exists any kind of “best” router in multiple different areas.The idea is to build up a virtualized network that somewhat relates to how a normal network looks insmaller companies today. This network will then be used for different types of testing while having thesoftware based router placed in the middle and having it take care of routing between different local virtualnetworks. All of the routers will be placed on the same server and their configuration will be very basicwhile also making sure that each of the routers get access to the same amount of hardware.After initial testing, all routers that perform bad will be opted out for additional testing. This is done tomake sure that there's no unnecessary testing done on routers that seem to not be able to keep up withthe other ones. The results from these tests will be compared to the results of a hardware router with thesame kind of tests used with it in the middle in relation to the tests the software routers had to go through.The results from the testing were fairly surprising, only having one single router being eliminated early onas the remaining ones continued to “battle” one another with more tests. These tests were compared tothe results of a hardware router and the results here were also quite surprising with a much betterperformance in many different areas from the software routers perspective.

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Lu, Haibin. "Data structures for dynamic router table." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000920.

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Kaplan, Namik. "Prototyping of an active and lightweight router." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA361504.

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Paul, Indrani. "Switch scheduling in the Multimedia Router (MMR)." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/13561.

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Love, Damon S. "Fast switch scheduling in the multimedia router." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/14960.

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Dominick, Steven James. "COMMERCIALIZATION AND OPTIMIZATION OF THE PIXEL ROUTER." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_theses/39.

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The Pixel Router was developed at the University of Kentucky with the intent of supporting multi-projector displays by combining the scalability of commercial software solutions with the flexibility of commercial hardware solutions. This custom hardware solution uses a Look Up Table for an arbitrary input to output pixel mapping, but suffers from high memory latencies due to random SDRAM accesses. In order for this device to achieve marketability, the image interpolation method needed improvement as well. The previous design used the nearest neighbor interpolation method, which produces poor looking results but requires the least amount of memory accesses. A cache was implemented to support bilinear interpolation to simultaneously increase the output frame rate and image quality. A number of software simulations were conducted to test and refine the cache design, and these results were verified by testing the implementation on hardware. The frame rate was improved by a factor of 6 versus bilinear interpolation on the previous design, and by as much as 50% versus nearest neighbor on the previous design. The Pixel Router was also certified for FCC conducted and radiated emissions compliance, and potential commercial market areas were explored.

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Wu, Jian. "A router for massively-parallel neural simulation." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515088.

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i. The author of this thesis (including any appendices and/or schedules to this thesis) owns any copyright in it (the "Copyright") and s/he has given The University of Manchester the right to use such Copyright for any administrative, promotional, educational and/or teaching purposes. ii. Copies of this thesis, either in full or in extracts, may be made only in accordance with the regulations of the John Rylands University Library of Manchester. Details of these regulations may be obtained from the Librarian. This page must form part of any such copies made. iii. The ownership of any patents, designs, trade marks and any and all other intellectual property rights except for the Copyright (the "Intellectual Property Rights") and any reproductions of copyright works, for example graphs and tables ("Reproductions"), which may be described in this thesis, may not be owned by the author and may be owned by third parties. Such Intellectual Property Rights and Reproductions cannot and must not be made available for use without the prior written permission of the owner(s) of the relevant Intellectual Property Rights and/or Reproductions. iv. Further information on the conditions under which disclosure, publication and exploitation of this thesis, the Copyright and any Intellectual Property Rights and/or Reproductions described in it may take place is available from the Head of School of School of Computer Science (or the Vice-President).

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Brinkmeyer, William D. Jr. "IPV6 alias resolution via induced router fragmentation." Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/34634.

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Approved for public release; distribution is unlimited
IPv4 addresses are a scarce resource with available allocations nearing exhaustion. DoD and government agencies were mandated to transition to IPv6 for greater security and flexibility. The transition to IPv6 faces a series of challenges associated with protecting the network. Among many defensive challenges associated with IPv6 is the inability to accurately identify and understand the network’s router-level topology. Providing an accurate IPv6 topology map is needed for security, situational awareness, and understanding the operational deployment and evolution of IPv6. To better understand IPv6 networks, this thesis focuses on the alias resolution problem whereby we seek to identify multiple interfaces belonging to a single IPv6 router. Alias resolution is critical to developing an accurate router-level topology map. This thesis presents a fingerprint-based IPv6 alias resolution technique that induces fragmented responses from IPv6 router interfaces. We demonstrate perfect alias resolution accuracy in a controlled environment, and on a small subset of the production IPv6 Internet for which ground-truth is known. Internet-wide testing finds that over 70% of IPv6 interfaces probed respond to the method.

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Kan, Kin Hong. "The implementation of a reliable router chip." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/38002.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
Includes bibliographical references (leaves 43-44).
by Kin Hong Kan.
M.Eng.

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Fragkiadakis, Alexandros. "An active router architecture using programmable hardware." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/34928.

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The current generation of networks is referred as the passive or conventional networks. Their functionality is limited to transfer packets from one point to another. Passive nodes such as routers and switches are vertically integrated devices that allow small or no modification on the operations they perform. Their functionality is limited to the network and (sometimes) transport protocol layers. They perform no computation on the payload data of the packets they handle. Due to their nature, passive networks impose limitations such as the difficulties of introducing new protocols and services, and limited performance. There is a different approach in the computer networks field, called Active Networks. Active Networks consist of routers and switches (Active Nodes) that not only forward packets from one point to another but also perform customised computations on them. The applications that execute on the Active Nodes can be user-driven. This allows end-users to program the network and tailor its services to their needs. Users could also inject their own code, which programs intermediate Active Nodes. This thesis presents an Active Router architecture using programmable hardware. The router consists of two hosts running Linux. The separation of the router functionality into two hosts is performed for safety reasons. A PCI-based board that hosts a Field Programmable Gate Array (FPGA) device comprises the programmable hardware element of the router. The motivation for using an FPGA device is that it is reprogrammable, so Active Applications can be installed on the fly, and it provides a safer execution environment. The software architecture of the Active Router comprises several modules that implement tasks such as the safe download of applications from dedicated servers, resource management, fault detection and isolation. The performance evaluation of the Active Router reveals several bottlenecks and limitations such as the PCI bus, the interrupt-driven nature of the Linux operating system.

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Glover, Garrett A. "The Next Generation Router System Cooling Design." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/191.

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Advancements in the networking and routing industry have created higher power electronic systems which dissipate large amounts of heat while cooling technology for these electronic systems has remained relatively unchanged. This report illustrates the development and testing of a hybrid liquid-air cooling system prototype implemented on Cisco’s 7609s router. Water was the working fluid through cold plates removing heat from line card components. The water was cooled by a compact liquid-air heat exchanger and circulated by two pumps. The testing results show that junction temperatures were maintained well below the 105°C limit for ambient conditions around 30°C at sea level. The estimated junction temperatures for Cisco’s standard ambient conditions of 50°C at 6,000 feet and 40°C at 10,000 feet were 104°C and 96°C respectively. Adjustments to the test data for Cisco’s two standard ambient conditions with expected device characteristics suggested the hybrid liquid-air cooling design could meet the projected heat load.

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Franz, Patrick. "Minimum Risk Routing." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:747-opus-245.

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Ali, Murad. "Performance Evaluation of an Open-source Multicast Router." Thesis, KTH, School of Information and Communication Technology (ICT), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24268.

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Open-source routing has gained momentum in the last few years due to expensive proprietary network hardware and software. People and organizations want more control on routing hardware and software. Inspired by the success of open-source software, and contributions by researchers and many volunteer developers across the globe, there are two open-source routing stacks in the market which are quite promising in terms of performance and features, namely Quagga and XORP. These routing daemons can run on many different hardware and operating systems, and are free to download and customize according to personal preference. Today, assembling a router from off-the-shelf hardware and open-source software is a matter of a few minute efforts. Nowadays, open-source software has become an integral part of many commercial network products.

This thesis presents a performance evaluation study of an open-source multicast router. Open-source routing software is used to build a fully functional, high-performing open-source multicast router. The multicast router is running the XORP (pronounced as Zorp) routing software installed on the Debian Linux operating system. A testbed which consisted of three open-source routers was created, where different performance and operational tests were conducted. The tests mainly concerned the evaluation of the multicast routing functionality of an open-source router in a production-like environment where triple-play services were provided to the customers. Linux Differentiated Services were used to provide quality of service to three different traffic classes. Besides these tests, reliability, router management and interoperability with proprietary routers were also evaluated.

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Ruambo, Francis Aidan, and Endale Assefa Gebre. "Performance Analysis Of A Bifrost Open Source Router." Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-20037.

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In this thesis work, we analyze the performance of a low - cost router which uses a Linux open source distribution optimized for routing, called Bifrost. The development of Bifrost started about ten years ago in the Swedish University of Agricultural Sciences (SLU). The open source community is huge and within the community exists many useful open source tools that can be integrated and used in open source community. Instead of using only commercial and proprietary equipment, which is a safe but unfortunately expensive solution, it can be a matter of great advantage to use open source technology to a large extent.For the thesis project, we install and configure the Bifrost open source software based router, on a standard desktop computer with three LAN cards and we tested its functionality and evaluated its performance. The Bifrost based router basic features analyzed are two routing protocols (BGP and OSPF) and Inter-VLAN routing. The performance of the Bifrost open source software based router is evaluated in terms of its packet forwarding throughput. The results obtained from the experiment setup for the performance analysis are discussed and compared with a commercial proprietary solution (in our case, a Cisco router of similar calibre). This is important, since the open source distributions also must offer a performance that is comparable or good enough compared with the proprietary solutions.

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Maly, Peter. "Applying layered modelling to a bridge/router architecture." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ27002.pdf.

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Swartz, Jordan S. "A high-speed timing-aware router for FPGAs." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0002/MQ40952.pdf.

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Poulin, Robert J. "Mapping autonomous system's router level topology in IPv6." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Jun%5FPoulin.pdf.

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Thesis (M.S. in Computer Science)--Naval Postgraduate School, June 2007.
Thesis Advisor(s): Geoffrey Xie, John Gibson. "June 2007." Includes bibliographical references (p. 397-399). Also available in print.

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Chinthalapani, Nishanth. "RDMA based IP routing protocols and router architecture." Thesis, Wichita State University, 2008. http://hdl.handle.net/10057/2006.

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The Ethernet technology has advanced from the era of fast Ethernet to the era of gigabit ethernet. The gigabit routers currently available in the market are employing expensive hardware based implementations for improving the throughput [6], which makes the overall cost of the device prohibitively high. In this thesis the author reviews the existing router architectures and routing protocols and critiques the shortcomings of the existing implementation. This thesis evaluates the drawbacks in the existing infrastructure and proposes an architecture that provides a solution based on the RDMA protocol. The proposed architecture uses the RDMA protocol for transferring the data payload from the ingress interface to the destination interface. In this research the author also presents an analytical mathematical model that can be used for calculating the delay incurred by a packet, memory utilization and CPU utilization for both architectures. The potential benefits by the use of RDMA protocol are also explained in detail in this thesis. The necessity for modifying the update packet structure in the existing implementation of RIP is discussed in detail. Packet payload handling in both architectures is compared and the advantages in the RDMA protocol based implementation are presented.
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Electrical and COmputer Engineering.
Includes bibliographic references (leaves 75-77)

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Krishnan, Subhasri. "A CONTROL MECHANISM TO THE ANYWHERE PIXEL ROUTER." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_theses/441.

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Traditionally large format displays have been achieved using software. A new technique of using hardware based anywhere pixel routing is explored in this thesis. Information stored in a Look Up Table (LUT) in the hardware can be used to tile two image streams to produce a seamless image display. This thesis develops a 1 input-image 1 output-image system that implements arbitrary image warping on the image, based a LUT stored in memory. The developed system control mechanism is first validated using simulation results. It is next validated via implementation to a Field Programmable Gate Array (FPGA) based hardware prototype and appropriate experimental testing. It was validated by changing the contents of the LUT and observing that the resulting changes on the pixel mapping were always correct.

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Raghunathan, Vijai. "AN EFFECTIVE CACHE FOR THE ANYWHERE PIXEL ROUTER." UKnowledge, 2007. http://uknowledge.uky.edu/ece_etds/8.

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Designing hardware to output pixels for light field displays or multi-projector systems is challenging owing to the memory bandwidth and speed of the application. A new technique of hardware that implements ‗anywhere pixel routing‘ was designed earlier at the University of Kentucky. This technique uses hardware to route pixels from input to output based upon a Look up Table (LUT). The initial design suffered from high memory latency due to random accesses to the DDR SDRAM input buffer. This thesis presents a cache design that alleviates the memory latency issue by reducing the number of random SDRAM accesses. The cache is implemented in the block RAM of a field programmable gate array (FPGA). A number of simulations are conducted to find an efficient cache. It is found that the cache takes only a few kilobits, about 7% of the block RAM and on an average speeds up the memory accesses by 20-30%.

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Ho, Ai Hua. "Virtual router approach for wireless ad hoc networks." Doctoral diss., University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4781.

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Wireless networks have become increasingly popular in recent years. There are two variations of mobile wireless networks: infrastructure mobile networks and infrastructureless mobile networks. The latter are also known as mobile ad hoc network (MANET). MANETs have no fixed routers. Instead, mobile nodes function as relay nodes or routers, which discover and maintain communication connections between source nodes and destination nodes for various data transmission sessions. In other words, an MANET is a self-organizing multi-hop wireless network in which all nodes within a given geographical area participate in the routing and data forwarding process. Such networks are scalable and self-healing. They support mobile applications where an infrastructure is either not available (e.g., rescue operations and underground networks) or not desirable (e.g., harsh industrial environments). In many ad hoc networks such as vehicular networks, links among nodes change constantly and rapidly due to high node speed. Maintaining communication links of an established communication path that extends between source and destination nodes is a significant challenge in mobile ad hoc networks due to movement of the mobile nodes. In particular, such communication links are often broken under a high mobility environment. Communication links can also be broken by obstacles such as buildings in a street environment that block radio signal. In a street environment, obstacles and fast moving nodes result in a very short window of communication between nodes on different streets. Although a new communication route can be established when a break in the communication path occurs, repeatedly reestablishing new routes incurs delay and substantial overhead. To address this limitation, we introduce the Virtual Router abstraction in this dissertation. A virtual router is a dynamically-created logical router that is associated with a particular geographical area. Its routing functionality is provided by the physical nodes (i.e., mobile devices) currently within the geographical region served by the virtual router. These physical nodes take turns in forwarding data packets for the virtual router. In this environment, data packets are transmitted from a source node to a destination node over a series of virtual routers. Since virtual routers do not move, this scheme is much less susceptible to node mobility. There can be two virtual router approaches: Static Virtual Router (SVR) and Dynamic Virtual Router (DVR). In SVR, the virtual routers are predetermined and shared by all communication sessions over time. This scheme requires each mobile node to have a map of the virtual routers, and use a global positioning system (GPS) to determine if the node is within the geographical region of a given router. DVR is different from SVR with the following distinctions: (1) virtual routers are dynamically created for each communication sessions as needed, and deprecated after their use; (2) mobile nodes do not need to have a GPS; and (3) mobile nodes do not need to know whereabouts of the virtual routers. In this dissertation, we apply Virtual Router approach to address mobility challenges in routing data. We first propose a data routing protocol that uses SVR to overcome the extreme fast topology change in a street environment. We then propose a routing protocol that does not require node locations by adapting a DVR approach. We also explore how the Virtual Router Approach can reduce the overhead associated with initial route or location requests used by many existing routing protocols to find a destination. An initial request for a destination is expensive because all the nodes need to be reached to locate the destination. We propose two broadcast protocols; one in an open terrain environment and the other in a street environment. Both broadcast protocols apply SVR. We provide simulation results to demonstrate the effectiveness of the proposed protocols in handling high mobility. They show Virtual Router approach can achieve several times better performance than traditional routing and broadcast approach based on physical routers (i.e., relay nodes).
ID: 030646255; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (Ph.D.)--University of Central Florida, 2011.; Includes bibliographical references (p. 110-122).
Ph.D.
Doctorate
Computer Science
Engineering and Computer Science
Computer Science

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Rexach, Carlos Francisco. "A pad router for the Monterey Silicon Compiler." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23086.

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A two layer pad router is developed for the Monterey Silicon Compiler. Features include an improved pad placement routine that extracts information from the internal layout to minimize chip area and wiring lengths, and a track allocation algorithm that minimizes the use of polysilicon during net layout. The router's performance was compared to that of the MacPitt's Silicon Compiler with four distinct circuits. The Monterey pad router layouts were 5% to 25% faster, and 10% to 15% smaller than those produced by MacPitts. Keywords: VLSI design, MacPitts, Silicon compiler, CAD Tools, Pad router, Pad placement, Router, Theses. (kt)

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Lam, Candies T. Y. "Photonic edge router for optical packet switched networks." Thesis, University of Essex, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402834.

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Rylander, Lina, and Hilda Sandberg. "Customer Driven Improvements of Home Network and Router." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-182745.

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This thesis is a service design project that has been carried out in cooperation with the telecom company Telia Sweden (belonging to TeliaSonera AB). The purpose of the report was to examine Telia's fixed broadband service for private customers from a customer perspective. Previously, the service has mainly been developed from a technology-driven perspective. During the broadband subscription, the customers are able to borrow a router from Telia but it has been noticed that some customers opt out Telia’s router. The objective of this work has been to deliver useful customer insights and improvement proposals to Telia within the framework of the broadband service. In the project, a service design methodology was used where the focus has been on interactions with customers. The interactions consisted of in-depth qualitative interviews. The project consisted of five phases. An initial preparation phase with a literature study on service design methods, the Internet and broadband technology as well as learning about and understanding the company. During the preparation phase internal hypotheses about the service problem areas were collected. The initial phase was followed by three iterative loops with customer interactions, insight analysis, ideation and conceptualization. Customer insights and concepts have been tested, evaluated, and deepened during the project. In the last phase the result was processed and the insights were rated for easier implementation. A major problem area for many customers was the Wi-Fi and Wi-Fi range, because the technology is perceived as difficult and abstract. The conclusion is that Telia should help their clients to improve the Wi-Fi quality and the project work led to three ultimate concepts tested on customers. Also six recommendations were delivered to Telia.
Detta examensarbete är ett tjänstedesignprojekt som har utförts i samarbete med telekombolaget Telia Sverige (tillhörande TeliaSonera AB). Syftet med rapporten har varit att undersöka Telias fasta bredbandstjänst för privatpersoner ur ett kundperspektiv. Tidigare har tjänsten främst utvecklats utifrån ett teknikdrivet perspektiv. Under tiden som bredbandskund hos Telia får kunden låna en router men Telia har märkt att en del kunder väljer bort routern. Målet för arbetet har varit att leverera användbara kundinsikter och koncept på förbättringsförslag till Telia inom ramen för bredbandstjänsten. I projektet har en tjänstedesignmetodik använts där fokus har legat på interaktioner med kunderna. Interaktionerna har bestått av djupgående kvalitativa intervjuer. Projektet har bestått av fem faser. En inledande förberedande fas med förstudie om bland annat tjänstedesignmetoder, internet och bredbandstekniken, samt tid för att lära känna och förstå företaget. Under den förberedande fasen samlades även interna hypoteser om tjänstens problemområden in. Den inledande fasen följdes av tre iterativa loopar med kundinteraktioner, insiktsanalys, idégenerering och konceptualisering. Kundinsikter och koncept har testats, utvärderats och fördjupats under projektets gång. I den sista fasen bearbetades och rangordnades resultatet för att insikterna lättare ska kunna implementeras på företaget. Ett stort problemområde för många kunder var Wi-Fi och Wi-Fi-täckningen, då tekniken upplevs som svår och abstrakt. Slutsatsen är att Telia borde hjälpa sina kunder att själva förbättra Wi-Fikvalitén och arbetet ledde fram till tre slutgiltiga koncept som testades på kunder och utvärderades. Även sex rekommendationer till Telia levererades.

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Chang, Yen-Jung, and 張晏榕. "NTHU-Route 2.0: A Fast and Stable Global Router." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/50137316832522598547.

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碩士
國立清華大學
資訊工程學系
96
We present in this thesis a fast and stable global router called NTHU-Route 2.0 that improves the solution quality and runtime of a state-of-the-art router, NTHURoute, by the following enhancements: (1) a new history based cost function, (2) new ordering methods for rip-up-and-reroute and congested region identification, and (3) two implementation techniques. The experimental results show that our router solves all ISPD98 benchmarks with very good quality. Besides, it routes 7 of 8 ISPD07 benchmarks without inducing any overflow. In particular, for one of the benchmarks which are thought to be difficult cases previously, our router is the only one that can completely eliminate its total overflow. Our router also successfully solves 12 of 16 ISPD08 benchmarks without causing any overflow and efficiently generates the best solutions for almost all benchmarks among all stateof-the-art global routers.

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Truppel, Alexandre Carvalho. "Layout aware router design and optimization for Wavelength-Routed Optical NoCs." Master's thesis, 2018. https://hdl.handle.net/10216/118910.

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Optical Networks-on-Chip are a promising solution for high-performance multi-core integration with better latency and bandwidth than traditional Electrical NoCs. Wavelength-routed ONoCs offer yet additional performance guarantees. However, WRONoC design presents new EDA challenges which have not yet been fully addressed. So far, most topology analysis is abstract, i.e., overlooks layout concerns, while for layout the tools available perform P&R but no topology optimization. Thus, a need arises for a novel optimization method combining both aspects of WRONoC design. In this thesis such a method is proposed and compared to the state of the art design procedure. Results available so far show a remarkable 50% reduction in maximum insertion loss with this new approach.

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Truppel, Alexandre Carvalho. "Layout aware router design and optimization for Wavelength-Routed Optical NoCs." Dissertação, 2018. https://hdl.handle.net/10216/118910.

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Optical Networks-on-Chip are a promising solution for high-performance multi-core integration with better latency and bandwidth than traditional Electrical NoCs. Wavelength-routed ONoCs offer yet additional performance guarantees. However, WRONoC design presents new EDA challenges which have not yet been fully addressed. So far, most topology analysis is abstract, i.e., overlooks layout concerns, while for layout the tools available perform P&R but no topology optimization. Thus, a need arises for a novel optimization method combining both aspects of WRONoC design. In this thesis such a method is proposed and compared to the state of the art design procedure. Results available so far show a remarkable 50% reduction in maximum insertion loss with this new approach.

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Gao, Xiaojie. "Router Congestion Control." Thesis, 2004. https://thesis.library.caltech.edu/2582/1/thesis.pdf.

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Congestion is a natural phenomenon in any network queuing system, and is unavoidable if the queuing system is operated at capacity. In this thesis, we study how to set the rules of a queuing system so that all the users have a self interest in controlling congestion when it happens.

Queueing system is a crucial component in effective router congestion control since it determines the way packets from different sources interact with each other. If packets are dropped by the queueing system indiscriminately, in some cases, the effect can be to encourage senders to actually increase their transmission rates, worsening the congestion, and destabilizing the system.

We approach this problem from game theory. We look on each flow as a competing player in the game; each player is trying to get as much bandwidth as possible. Our task is to design a game at the router that will protect low-volume flows and punish high-volume ones. Because of the punishment, being high-volume will be counter productive, so flows will tend to use a responsive protocol as their transport-layer protocol. The key aspect of our solution is that by sending no packets from high-volume flows in case of congestion, it gives these flows an incentive to use a more responsive protocol.

In the thesis, we will describe several implementations of our solution, and show that we achieve the desired game-theoretic equilibrium while also maintaining bounded queue lengths and responding to changes in network flow conditions. Finally, we accompany the theoretical analysis with network simulations under a variety of conditions.

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何嘉量. "An Over_The_Cell Channel Router." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/25716546457117677169.

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LI, YI-LANG, and 李毅郎. "A greedy zone router." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/75942894757522348632.

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Carrapa, Daniel Guedes da Costa Neves. "Mobile router : control plane." Master's thesis, 2009. http://hdl.handle.net/10216/58075.

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吳久徵. "Simple Home Wireless Router." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/41079503734258107314.

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碩士
明新科技大學
產業研發碩士專班
99
As simple Home Router which the Japanese manufacturer proposed is the foundation demand to research to achieve the delicate and slim Home Router which is conformed to customer request. In hardware's practice, we use two network holes that reduce the cubage to reduce the weight to replace five network holes mostly in the traditional router. In software, we design by Linux as the main source to reduce equipment's operation to avoid the nonessential mistake. The equipment achieves the function that detects network service as automatically as possible, backups the common setup under the concept, and it could be compatible with every different browser on the interface of homepage designed This reality passed repeated function verification test which satisfies customer’s demand in automatic function. It support the compatibility of browser very well with all PC,NB , mobiles in all famous brands after test proved. So the practice thesis not only achieves the motivation but also meets the target of product which is slim, delicate, and friendly.

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Carrapa, Daniel Guedes da Costa Neves. "Mobile router : control plane." Dissertação, 2009. http://hdl.handle.net/10216/58075.

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CHANG, CHIH-WEN, and 張誌雯. "Wireless Router Performance Advance." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/tjezvc.

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碩士
明新科技大學
電子工程系碩士在職專班
106
SDRAM,DDR,DDR2,DDR3,DDR4,NAND Flash,NOR Flash, all call memory. The Router , smart phone ,smart TV and tablet PC all need memory . How to make higher performance production on the same cost with others company ? We studied three method to advance performance of router.The first is changed VDD to 1.9V and output driving strength to full. The second is to raise DRAM CLK.The third is to adjust ac parameter of DDR2. “Changed VDD to 1.9V and full output driving strength” solution got a better performance.Performance increase about 38% .

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Lin, Chaang-Yow, and 林昶佑. "Functional Emulations of IP Router." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/17228692616350546161.

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碩士
國立高雄第一科技大學
電腦與通訊工程系
89
Transmission link bandwidths keep improving, at a seemingly inexorable rate, as the result of research in transmission technology. Simultaneously, expanding network usage is creating an ever-increasing demand that can only be served by these higher bandwidth links. Unfortunately, transmission links alone do not make a network. To achieve an overall improvement in networking performance, other components such as host adapters, operating systems, switches, multiplexers, and routers also need to get faster. Routers have often been seen as one of the lagging technologies. One result of these improvements has been to put pressure on router technology to keep pace. In this thesis, we rebuild LINUX kernel to emulate IP router’s functions. We are according to RFC 1812 spec. to emulate IP router’s functions, and test it. Forwarding algorithm includes option, header checksum, time to live, addressing, local delivery decision, determining the next hop address, IP destination address, local/remote decision. We also use new architecture to achieve the routing table. Routing table consist of routing cache and forwarding information base. Nearly all caches in commerical production use least-recently used (LRU) policy to manage the lines in a set. One problem with the LRU replacement policy is that it does not anticipate the future well when sequential or cyclical activity is in progress. We point out two ways to obtain improvements over LRU replacement. The first way is to replace dead line in the LRU cache. The other way is to shadow directory. It consists of main directory and shadow directory. When a new item is brought into the main cache, one of K items in the same set is discarded from that cache. The discarded item is entered in the shadow directory, displacing one of K items from the corresponding set in that directory. The key to the cache’s operation is that there are two kinds of misses, transient miss and shadow miss. That information is used to control replacement.

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Dissertations / Theses on the topic 'Router'

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