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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 6 of 6 (0.284 seconds)Spelling suggestions: "subject:"last ethernet"" "subject:"last éthernet""
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Networking Requirements and Solutions for a TV WWW BrowserDavid, Theodoros P. 25 September 1997 (has links)
Most people cannot access the World Wide Web (WWW) and other Internet services because access requires a complex and expensive computer. Moreover, the bandwidth offered to the general public is mostly limited by today's analog modems through standard telephone lines. An inexpensive, easy-to-use Internet/WWW access service, able to handle bandwidth-intensive, multimedia-oriented WWW pages, is currently not available to the general public.
Some concrete proposals, and even completed products, have been provided by the computer and communications industry. Nonetheless, these solutions are either still too expensive and complex or have limited bandwidth. One service that introduces a simple and inexpensive way to access the Internet, while providing high bandwidth, is the IVDS/WWW Browser. Controlled by a central WWW Browser Server, the WWW pages are displayed on a standard television set using an IVDS (Interactive Video and Data Service) Decoder Box, an inexpensive hardware device. The user can access the WWW using a remote control device. This thesis presents the networking requirements and solutions for the IVDS/WWW Browser Server and the IVDS Decoder Box. / Master of Science
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A low-cost man-portable free-space optics communication device for Ethernet applicationsPerera, Janaka P. 12 1900 (has links)
Approved for public release, distribution is unlimited / This thesis sought to design and implement a low-cost, portable, Free-Space Optics (FSO) communications device for Ethernet applications. Under some circumstances such a device would have utility at a Combat Operations Center (COC), a Field Artillery Position, or wherever else fiber optic cable is used in garrison or field. The design was based on commercial off the shelf components originally designed for fiber optic applications. Based on a 155 megabits per second (Mbps) media converter, the design used two fiber optic transceivers, coupled to collimating lenses to pass data over free-space. Sustained data rate of 100 Mbps was achieved with full network functionality on the optical bench with a low-power (0.5mW) laser diode transmitter without focusing optics on the receiver. The laser diode power(mounted on device), was measured with acceptable losses up to 300 ft during testing using a photodiode with focusing optics. The findings indicate that the system with proper collecting optics could be optimized for free-space communication at short to moderate ranges. / Captain, United States Marine Corps
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Optimizing Point-to-Point Ethernet Cluster CommunicationReinhardt, Mirko 01 March 2006 (has links) (PDF)
This work covers the implementation of a raw Ethernet communication module
for the Open MPI message passing library. Thereby it focuses on both the reduction of the
communication latency for small messages and maximum possible compatibility.
Especially the need for particular network devices, adapted network device drivers or
kernel patches is avoided. The work is divided into three major parts: First, the
networking subsystem of the version 2.6 Linux kernel is analyzed. Second, an Ethernet
protocol family is implemented as a loadable kernel module, consisting of a basic
datagram protocol (EDP), providing connection-less and unreliable datagram transport,
and a streaming protocol (ESP), providing connection-oriented, sequenced and reliable
byte streams. The protocols use the standard device driver interface of the Linux kernel
for data transmission and reception. Their services are made available to user-space
applications through the standard socket interface. Last, the existing Open MPI TCP
communication module is ported atop the ESP. With bare EDP/ESP sockets a message
latency of about 30 us could be achieved for small messages, which compared to the
TCP latency of about 40 us is a reduction of 25 %.
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| 4 |
Optimizing Point-to-Point Ethernet Cluster CommunicationReinhardt, Mirko 28 February 2006 (has links)
This work covers the implementation of a raw Ethernet communication module
for the Open MPI message passing library. Thereby it focuses on both the reduction of the
communication latency for small messages and maximum possible compatibility.
Especially the need for particular network devices, adapted network device drivers or
kernel patches is avoided. The work is divided into three major parts: First, the
networking subsystem of the version 2.6 Linux kernel is analyzed. Second, an Ethernet
protocol family is implemented as a loadable kernel module, consisting of a basic
datagram protocol (EDP), providing connection-less and unreliable datagram transport,
and a streaming protocol (ESP), providing connection-oriented, sequenced and reliable
byte streams. The protocols use the standard device driver interface of the Linux kernel
for data transmission and reception. Their services are made available to user-space
applications through the standard socket interface. Last, the existing Open MPI TCP
communication module is ported atop the ESP. With bare EDP/ESP sockets a message
latency of about 30 us could be achieved for small messages, which compared to the
TCP latency of about 40 us is a reduction of 25 %.
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| 5 |
Low-Latency Hard Real-Time Communication over Switched Ethernet / Effiziente Echtzeitkommunikation über Switched EthernetLöser, Jork 01 January 2006 (has links) (PDF)
With the upsurge in the demand for high-bandwidth networked real-time applications in cost-sensitive environments, a key issue is to take advantage of developments of commodity components that offer a multiple of the throughput of classical real-time solutions. It was the starting hypothesis of this dissertation that with fine grained traffic shaping as the only means of node cooperation, it should be possible to achieve lower guaranteed delays and higher bandwidth utilization than with traditional approaches, even though Switched Ethernet does not support policing in the switches as other network architectures do. This thesis presents the application of traffic shaping to Switched Ethernet and validates the hypothesis. It shows, both theoretically and practically, how commodity Switched Ethernet technology can be used for low-latency hard real-time communication, and what operating-system support is needed for an efficient implementation.
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Low-Latency Hard Real-Time Communication over Switched EthernetLöser, Jork 31 January 2006 (has links)
With the upsurge in the demand for high-bandwidth networked real-time applications in cost-sensitive environments, a key issue is to take advantage of developments of commodity components that offer a multiple of the throughput of classical real-time solutions. It was the starting hypothesis of this dissertation that with fine grained traffic shaping as the only means of node cooperation, it should be possible to achieve lower guaranteed delays and higher bandwidth utilization than with traditional approaches, even though Switched Ethernet does not support policing in the switches as other network architectures do. This thesis presents the application of traffic shaping to Switched Ethernet and validates the hypothesis. It shows, both theoretically and practically, how commodity Switched Ethernet technology can be used for low-latency hard real-time communication, and what operating-system support is needed for an efficient implementation.
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