This paper discusses current network technologies and protocols and presents a simulation study of the most common networking protocol used today, TCP/IP. The TCP/IP protocol stack has many inherent problems that will be shown through this simulation study. Using the SimpleScalar Toolset, the significance of the data copying and checksumming performed in TCP/IP will be shown along with the architecture needed to support the processing of TCP/IP. Solutions for these TCP/IP pitfalls including a zero-copy protocol and a design for an intelligent network interface card will also be presented. / Graduation date: 2000

Thesis (Ph. D.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.

Sterners Specialfabrik AB tillverkar bland annat mynt- och biljettautomater. För att underlätta felsökning, underhåll, avläsning av statistik med mera på en automat är det lämpligt att detta utförs på en PC över Internet. Det innebär att automaten inte behöver besökas då dessa uppgifter skall utföras. Examensarbetet går ut på att få en PIC mikrokontroller att kommunicera med en användare vid en PC över internet. För detta krävs att en TCP/IP stack implementeras på PICmikrokontrollern. Arbetet ledde till en fungerande demoapplikation som klarar av att kommunicera över TCP/IP. Demoapplikationen innehåller diverse olika funktioner för att demonstrera hur en automat skulle kunna styras och övervakas.

Diss. (sammanfattning) Sundsvall : Mittuniversitetet, 2008. / Härtill 5 uppsatser.

Techn. University, Diss., 2004--Berlin.

No description available.

International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The Western Aeronautical Test Range (WATR) operates the ground stations for research vehicles operating at the NASA Dryden Flight Research Center (DFRC). Recently, the WATR implemented a new system for distributing Time, Space, and Position Information (TSPI) data. The previous system for processing this data was built on archaic hardware that is no longer supported, running legacy software with no upgrade path. The purpose of the Radar Information Processing System (RIPS) is to provide the ability to acquire TSPI data from a variety of sources and process the data for subsequent distribution to other destinations located at the various DFRC facilities. RIPS is built of commercial, off the shelf (COTS) hardware installed in Personal Computers (PC). Data is transported between these computers on a Gigabit Ethernet network. The software was developed using C++ with a modular, object-oriented design approach.

Yuen Ka-nang. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references (leaves 133-135). / Abstracts in English and Chinese. / Abstract --- p.i / Acknowledgement --- p.iii / Chapter 1. --- INTRODUCTION --- p.1 / Chapter 1.1. --- Background --- p.1 / Chapter 1.2. --- Objectives --- p.1 / Chapter 1.3. --- Overview of Thesis --- p.2 / Chapter 2. --- NETWORK ASPECT OF THE VOIP TECHNOLOGY --- p.3 / Chapter 2.1. --- VoIP Overview --- p.3 / Chapter 2.2. --- Elements in VoIP --- p.3 / Chapter 2.2.1. --- Call Setup --- p.3 / Chapter 2.2.2. --- Media Capture/Playback --- p.4 / Chapter 2.2.3. --- Media Encoding/Decoding --- p.4 / Chapter 2.2.4. --- Media Transportation --- p.5 / Chapter 2.3. --- Performance Factors Affecting VoIP --- p.6 / Chapter 2.3.1. --- Network Bandwidth --- p.6 / Chapter 2.3.2. --- Latency --- p.6 / Chapter 2.3.3. --- Packet Loss --- p.7 / Chapter 2.3.4. --- Voice Quality --- p.7 / Chapter 2.3.5. --- Quality of Service (QoS) --- p.7 / Chapter 2.4. --- Different Requirements of Intranet VoIP and Internet VoIP --- p.8 / Chapter 2.4.1. --- Packet Loss/Delay/Jitter --- p.8 / Chapter 2.4.2. --- Interoperability --- p.9 / Chapter 2.4.3. --- Available Bandwidth --- p.9 / Chapter 2.4.4. --- Security Requirement --- p.10 / Chapter 2.5. --- Some Feasibility Investigations --- p.10 / Chapter 2.5.1. --- Bandwidth Calculation --- p.10 / Chapter 2.5.2. --- Simulation --- p.12 / Chapter 2.5.3. --- Conclusion --- p.17 / Chapter 2.5.4. --- Simulation Restrictions --- p.17 / Chapter 3. --- SOFTWARE ASPECT OF THE VOIP TECHNOLOGY --- p.19 / Chapter 3.1. --- VoIP Client in JMF --- p.19 / Chapter 3.1.1. --- Architecture --- p.20 / Chapter 3.1.2. --- Incoming Voice Stream Handling --- p.23 / Chapter 3.1.3. --- Outgoing Voice Stream Handling --- p.23 / Chapter 3.1.4. --- Relation between Incoming/Outgoing Voice Stream Handling --- p.23 / Chapter 3.1.5. --- Areas for Further Improvement --- p.25 / Chapter 3.2. --- Capture/Playback Enhanced VoIP Client --- p.26 / Chapter 3.2.1. --- Architecture --- p.27 / Chapter 3.2.2. --- Native Voice Playback Mechanism --- p.29 / Chapter 3.2.3. --- Native Voice Capturing Mechanism --- p.31 / Chapter 3.3. --- Win32 C++ VoIP Client --- p.31 / Chapter 3.3.1. --- Objectives --- p.32 / Chapter 3.3.2. --- Architecture --- p.33 / Chapter 3.3.3. --- Problems and Solutions in Implementation --- p.37 / Chapter 3.4. --- Win32 DirectSound C++ VoIP Client --- p.38 / Chapter 3.4.1. --- Architecture --- p.39 / Chapter 3.4.2. --- DirectSound Voice Playback Mechanism --- p.40 / Chapter 3.4.3. --- DirectSound Voice Capturing Mechanism --- p.44 / Chapter 3.5. --- Testing VoIP Clients --- p.45 / Chapter 3.5.1. --- Setup of Experiment --- p.45 / Chapter 3.5.2. --- Experiment Results --- p.47 / Chapter 3.5.3. --- Experiment Conclusion --- p.48 / Chapter 3.6. --- Real-time Voice Stream Mixing Server --- p.48 / Chapter 3.6.1. --- Structure Overview --- p.48 / Chapter 3.6.2. --- Experiment --- p.53 / Chapter 3.6.3. --- Conclusion --- p.54 / Chapter 4. --- EXPERIMENTAL STUDIES --- p.55 / Chapter 4.1. --- Pure IP-side VoIP-based Call Center ´ؤ VoIP in Education --- p.55 / Chapter 4.1.1. --- Architecture --- p.55 / Chapter 4.1.2. --- Client Structure --- p.56 / Chapter 4.1.3. --- Client Applet User Interface --- p.58 / Chapter 4.1.4. --- Observations --- p.63 / Chapter 4.2. --- A Simple PBX Experiment --- p.63 / Chapter 4.2.1. --- Structural Overview --- p.63 / Chapter 4.2.2. --- PSTN Gateway Server Program --- p.64 / Chapter 4.2.3. --- Problems and Solutions in Implementation --- p.66 / Chapter 4.2.4. --- Experiment 1 --- p.66 / Chapter 4.2.5. --- Experiment 2 --- p.68 / Chapter 5. --- A COMPREHENSIVE VOIP PROJECT 一 GRADUATE SECOND PHONE (GSP) --- p.72 / Chapter 5.1. --- Overview --- p.72 / Chapter 5.1.1. --- Background --- p.72 / Chapter 5.1.2. --- Architecture --- p.76 / Chapter 5.1.3. --- Technologies Used --- p.78 / Chapter 5.1.4. --- Major Functions --- p.80 / Chapter 5.2. --- Client --- p.84 / Chapter 5.2.1. --- Structure Overview --- p.85 / Chapter 5.2.2. --- Connection Procedure --- p.89 / Chapter 5.2.3. --- User Interface --- p.91 / Chapter 5.2.4. --- Observations --- p.92 / Chapter 5.3. --- Gateway --- p.94 / Chapter 5.3.1. --- Structure Overview --- p.94 / Chapter 5.3.2. --- Connection Procedure --- p.97 / Chapter 5.3.3. --- Caller ID Simulator --- p.97 / Chapter 5.3.4. --- Observations --- p.98 / Chapter 5.4. --- Server --- p.101 / Chapter 5.4.1. --- Structure Overview --- p.101 / Chapter 5.5. --- Details of Major Functions --- p.103 / Chapter 5.5.1. --- Secure Local Voice Message Box --- p.104 / Chapter 5.5.2. --- Call Distribution --- p.106 / Chapter 5.5.3. --- Call Forward --- p.112 / Chapter 5.5.4. --- Call Transfer --- p.115 / Chapter 5.6. --- Experiments --- p.116 / Chapter 5.6.1. --- Secure Local Voice Message Box --- p.117 / Chapter 5.6.2. --- Call Distribution --- p.118 / Chapter 5.6.3. --- Call Forward --- p.121 / Chapter 5.6.4. --- Call Transfer --- p.122 / Chapter 5.6.5. --- Dial Out --- p.124 / Chapter 5.7. --- Observations --- p.125 / Chapter 5.8. --- Outlook --- p.126 / Chapter 5.9. --- Alternatives --- p.127 / Chapter 5.9.1. --- Netmeeting --- p.127 / Chapter 5.9.2. --- OpenH323 --- p.128 / Chapter 6. --- CONCLUSIONS --- p.129 / Bibliography --- p.133

Tese de mestr.. Engenharia Electrotécnica e de Computadores. Faculdade de Engenharia. Universidade do Porto. 1998

Tese de doutoramento. Engenharia Electrotécnica e de Computadores. Faculdade de Engenharia. Universidade do Porto. 2008