• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 104
  • 17
  • 9
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 140
  • 113
  • 110
  • 41
  • 23
  • 21
  • 19
  • 19
  • 15
  • 13
  • 12
  • 12
  • 11
  • 11
  • 9
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the 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.
91

Network architecture in a large-scale fully interactive VOD system based on hybrid multicast-unicast streaming.

January 2001 (has links)
Chan Kwun-chung. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references (leaves 71-73). / Abstracts in English and Chinese. / 摘要 --- p.II / ABSTRACT --- p.III / ACKNOWLEDGEMENT --- p.V / TABLE OF CONTENTS --- p.VI / LIST OF FIGURES --- p.X / LIST OF SYMBOLS --- p.XII / Chapter 1. --- INTRODUCTION --- p.1 / Chapter 1.1 --- Contributions --- p.3 / Chapter 1.2 --- Organization of the Thesis --- p.4 / Chapter 1.3 --- Publications --- p.5 / Chapter 2. --- RELATED WORKS --- p.6 / Chapter 2.1 --- Previous VOD System --- p.7 / Chapter 2.1.1 --- Service Model --- p.7 / Chapter 2.1.1.1 --- Unicast VOD --- p.7 / Chapter 2.1.1.2 --- Multicast VOD --- p.8 / Chapter 2.1.2 --- Architecture --- p.9 / Chapter 2.1.2.1 --- Centralized Architecture --- p.9 / Chapter 2.1.2.2 --- Distributed Architecture --- p.10 / Chapter 2.1.3 --- Interactive Function --- p.11 / Chapter 2.1.3.1 --- Limited Interactive Function --- p.11 / Chapter 2.1.3.2 --- Unlimited Interactive Function --- p.11 / Chapter 2.1.4 --- Split and Merge Operation --- p.12 / Chapter 2.1.4.1 --- SAM Scheme (Split and Merge) --- p.12 / Chapter 2.1.4.2 --- SRMDRU Scheme (Single Rate Multicast Double Rate Unicast) --- p.14 / Chapter 2.2 --- Previous Caching Algorithm --- p.15 / Chapter 2.2.1 --- LFU (Least Frequently Used) --- p.15 / Chapter 2.2.2 --- LRU (Least Recently Used) --- p.15 / Chapter 2.2.3 --- Media Stream Caching --- p.15 / Chapter 3. --- DESIGN OFA NOVEL VOD SYSTEM --- p.17 / Chapter 3.1 --- System Architecture --- p.18 / Chapter 3.1.1 --- Multicast Video Server Cluster (MVSC) --- p.19 / Chapter 3.1.2 --- Unicast Video Server Cluster (UVSC) --- p.20 / Chapter 3.1.3 --- Multicast Backbone Network (MBN) --- p.20 / Chapter 3.1.4 --- Local Distribution Network (LDN) --- p.21 / Chapter 3.1.5 --- Distributed Interactive Server (DIS) --- p.21 / Chapter 3.1.6 --- Distributed Proxy Server (DPS) --- p.22 / Chapter 3.1.7 --- Client Station (CS) --- p.22 / Chapter 3.2 --- Batched Multicast Transmission --- p.24 / Chapter 3.3 --- Split and Merge Operation --- p.26 / Chapter 3.4 --- Interactive Function --- p.31 / Chapter 3.4.1 --- Pause --- p.31 / Chapter 3.4.2 --- Slow Motion --- p.35 / Chapter 3.4.3 --- Various Speed Fast Forward / Fast Rewind (FF/REW) --- p.37 / Chapter 3.4.4 --- Jump Forward/Jump Backward (JF/JB) --- p.42 / Chapter 3.5 --- Performance Analysis --- p.46 / Chapter 3.5.1 --- Model --- p.46 / Chapter 3.5.2 --- System Parameters --- p.49 / Chapter 3.5.3 --- Results --- p.49 / Chapter 4. --- DESIGN OF A VIDEO PROXY SYSTEM --- p.57 / Chapter 4.1 --- Video Proxy System --- p.58 / Chapter 4.1.1 --- Priority Function --- p.59 / Chapter 4.1.2 --- Two-Stage Replacement Policy --- p.60 / Chapter 4.1.3 --- Caching Policy --- p.61 / Chapter 4.2 --- Performance Evaluation --- p.63 / Chapter 4.2.1 --- Simulation Environment --- p.63 / Chapter 4.2.2 --- Performance Metric --- p.64 / Chapter 4.2.3 --- Results --- p.64 / Chapter 5. --- CONCLUSION --- p.69 / BIBLIOGRAPHY --- p.71
92

DINA: a hybrid multicast-unicast fully interactive video-on-demand system.

January 2001 (has links)
by Ng Chi Ho. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references (leaves 64-65). / Abstracts in English and Chinese. / ABSTRACT --- p.I / ACKNOWLEDGEMENT --- p.II / TABLE OF CONTENTS --- p.III / LIST OF TABLES --- p.VI / LIST OF FIGURES --- p.VII / LIST OF ABBREVIATIONS --- p.X / Chapter CHAPTER 1 --- INTRODUCTION --- p.1 / Chapter 1.1 --- Overview --- p.1 / Chapter 1.2 --- Related works --- p.5 / Chapter 1.3 --- Organization of this Thesis --- p.6 / Chapter CHAPTER 2 --- BACKGROUND --- p.7 / Chapter 2.1 --- Introduction to VOD Systems --- p.7 / Chapter 2.1.1 --- Pure unicast VOD System --- p.8 / Chapter 2.1.2 --- Pure multicast VOD System --- p.9 / Chapter 2.1.3 --- Centralized VOD System --- p.9 / Chapter 2.1.4 --- Distributed VOD System --- p.10 / Chapter 2.1.5 --- Hybrid VOD System (DINA) --- p.11 / Chapter 2.1.6 --- Comparisons --- p.12 / Chapter 2.2 --- Interactive Functions --- p.14 / Chapter 2.2.1 --- Speedup --- p.14 / Chapter 2.2.2 --- Split and merge (I and S streams) --- p.14 / Chapter 2.2.3 --- Prerecord --- p.15 / Chapter 2.3 --- Error Recovery --- p.16 / Chapter 2.3.1 --- Pure FEC --- p.17 / Chapter 2.3.2 --- Pure ARQ --- p.17 / Chapter 2.3.3 --- Hybrid ARQ --- p.18 / Chapter 2.3.4 --- Rate-Compatible Punctured Convolutional Codes --- p.18 / Chapter CHAPTER 3 --- HYBRID MULTICAST-UNICAST VOD SYSTEM --- p.21 / Chapter 3.1 --- System Overview --- p.21 / Chapter 3.1.1 --- VSC (Video Server Cluster) --- p.22 / Chapter 3.1.2 --- DIS (Distributed Interactive Server) --- p.24 / Chapter 3.1.3 --- NAK (Negative Acknowledgement Server) --- p.25 / Chapter 3.1.4 --- CS (Client Stations) --- p.26 / Chapter 3.1.5 --- MBN (Multicast Backbone Network) --- p.27 / Chapter 3.1.6 --- LDN (Local Distribution Network) --- p.27 / Chapter 3.2 --- Interactive Functions --- p.28 / Chapter 3.2.1 --- Hybrid Multicast- Unicast --- p.28 / Chapter 3.2.2 --- Pause --- p.30 / Chapter 3.2.3 --- Slow Forward (SF) --- p.33 / Chapter 3.2.4 --- Slow Backward (SB) --- p.35 / Chapter 3.2.5 --- Fast Forward (FF) / Fast Backward (FB) --- p.38 / Chapter 3.2.6 --- Jump Forward (JF) / Jump Backward (JB) --- p.41 / Chapter 3.3 --- System Performance --- p.46 / Chapter 3.3.1 --- System Model --- p.46 / Chapter 3.3.2 --- Simulation Results --- p.47 / Chapter 3.3.3 --- Trade off --- p.53 / Chapter CHAPTER 4 --- DISTRIBUTED TYPE-II HARQ --- p.54 / Chapter 4.1 --- Algorithm Description --- p.54 / Chapter 4.1.1 --- Design details --- p.54 / Chapter 4.1.2 --- Simulation Results --- p.59 / Chapter CHAPTER 5 --- CONCLUSION --- p.62 / BIBLIOGRAPHY --- p.64
93

Real-time multicast with scalable reliability.

January 1998 (has links)
by Patrick C.K. Wu. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1998. / Includes bibliographical references (leaves 57-[59]). / Abstract also in Chinese. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Research Objectives --- p.2 / Chapter 1.2 --- Organization of the Thesis --- p.2 / Chapter 2 --- Background --- p.4 / Chapter 2.1 --- Reliable Multicasting --- p.4 / Chapter 2.2 --- Related Work --- p.5 / Chapter 2.2.1 --- RMTP --- p.5 / Chapter 2.2.2 --- RMP --- p.6 / Chapter 2.2.3 --- RAMP --- p.7 / Chapter 2.3 --- Multicast with Scalable Reliability (MSR) --- p.8 / Chapter 3 --- Traffic Shaping in MSR --- p.10 / Chapter 3.1 --- Single Queue System --- p.11 / Chapter 3.2 --- Scaling factor α --- p.12 / Chapter 4 --- Retransmission Scheme in MSR --- p.15 / Chapter 4.1 --- Packet Loss Detection and Requests for Retransmission at the Receivers --- p.17 / Chapter 4.2 --- Retransmission at the Sender --- p.19 / Chapter 4.3 --- Dynamic Adjustment of Retransmission Timeout Value --- p.22 / Chapter 4.4 --- Scaling Reliability using Transmit-Display Window --- p.29 / Chapter 5 --- NACK Implosion Prevention --- p.31 / Chapter 5.1 --- Electing a Representative Receiver --- p.32 / Chapter 5.2 --- Determining T --- p.33 / Chapter 5.3 --- Determining β --- p.34 / Chapter 6 --- Performance Study of MSR --- p.38 / Chapter 6.1 --- Performance Study of MSR in Simple Network Topologies --- p.39 / Chapter 6.2 --- Star Topology --- p.40 / Chapter 6.3 --- Tree Topology --- p.44 / Chapter 6.4 --- Exploring the use of MSR Gateway --- p.47 / Chapter 7 --- Conclusion and Future Work --- p.50 / Chapter 7.1 --- Future Work --- p.50 / Chapter 7.2 --- Conclusions --- p.51 / Chapter A --- MSR Packet Formats --- p.52 / Chapter A.1 --- MSR Fixed Header --- p.52 / Chapter A.2 --- MSR Audio Data Header --- p.54 / Chapter A.3 --- MSR NACK Packets --- p.55 / Bibliography --- p.57
94

Decentralized periodic broadcasting for large-scale video streaming.

January 2006 (has links)
To Ka Ki. / Thesis submitted in: August 2005. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references (leaves 55-56). / Abstracts in English and Chinese. / Acknowledgement --- p.i / Abstract --- p.ii / 摘要 --- p.iii / Chapter Chapter 1 --- INTRODUCTION --- p.5 / Chapter Chapter 2 --- related WORKS --- p.12 / Chapter Chapter 3 --- Decentralization of Periodic Broadcasting --- p.16 / Chapter 3.1 --- Staggered Broadcasting --- p.16 / Chapter 3.2 --- Modified Staggered Broadcasting --- p.17 / Chapter Chapter 4 --- PEERS SYNCHRONIZATION --- p.21 / Chapter 4.1 --- Integrating PCS with Periodic Broadcasting --- p.22 / Chapter 4.2 --- Distributed PCS --- p.23 / Chapter Chapter 5 --- Performance Evaluations of Decentralized Periodic Broadcasting Architecture --- p.27 / Chapter 5.1 --- Sensitivity to Clock Drift --- p.28 / Chapter 5.2 --- System Dynamic Behavior --- p.30 / Chapter Chapter 6 --- P-NICE --- p.33 / Chapter 6.1 --- The Original NICE Protocol --- p.34 / Chapter 6.2 --- Parallel Overlay Architecture --- p.35 / Chapter 6.3 --- Control Overheads --- p.37 / Chapter Chapter 7 --- Performance Evaluations of P-NICE --- p.39 / Chapter 7.1 --- End-to-End Packet Delivery Ratio --- p.40 / Chapter 7.2 --- Utilization of Network Links --- p.41 / Chapter 7.3 --- Convergence Time of End-to-End Packet Delivery Ratio --- p.44 / Chapter 7.4 --- Effect of Number of Overlays --- p.45 / Chapter 7.5 --- End-to-End Data Delivery Delay --- p.47 / Chapter 7.6 --- Load Balance of Overlays --- p.47 / Chapter 7.7 --- Peers Reception Quality --- p.48 / Chapter 7.8 --- Control Overheads --- p.51 / Chapter Chapter 8 --- Conclusions --- p.53 / Bibliography --- p.55
95

WAIT: Selective Loss Recovery for Multimedia Multicast.

Mane, Pravin D 31 July 2000 (has links)
"Recently the Internet has been increasingly used for multi-party applications like video-conferencing, video-on-demand and shared white-boards. Multicast extensions to IP to support multi-party applications are best effort, often resulting in packet loss within the network. Since some multicast applications can not tolerate packet loss, most of the existing reliable multicast schemes recover each and every lost packet. However, multimedia applications can tolerate a certain amount of packet loss and are sensitive to long recovery delays. We propose a new loss recovery technique that selectively repairs lost packets based upon the amount of packet loss and delay expected for the repair. Our technique sends a special WAIT message down the multicast tree in the event a loss is detected in order to reduce the number of retransmission requests. We also propose an efficient sender initiated multicast trace-route mechanism for determining the multicast topology and a mechanism to deliver the topology information to the multicast session participants. We evaluate our proposed technique using an event driven network simulator, comparing it with two popular reliable multicast protocols, SRM and PGM. We conclude that our proposed WAIT protocol can reduce the overhead on a multicast session as well as improve the average end-to-end latency of the session."
96

Feedback in wireless networks cross-layer design, secrecy and reliability /

Gopala, Praveen Kumar, January 2007 (has links)
Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 119-123).
97

Understanding a large-scale IPTV network via system logs

Qiu, Tongqing 08 July 2011 (has links)
Recently, there has been a global trend among the telecommunication industry on the rapid deployment of IPTV (Internet Protocol Television) infrastructure and services. While the industry rushes into the IPTV era, the comprehensive understanding of the status and dynamics of IPTV network lags behind. Filling this gap requires in-depth analysis of large amounts of measurement data across the IPTV network. One type of the data of particular interest is device or system log, which has not been systematically studied before. In this dissertation, we will explore the possibility of utilizing system logs to serve a wide range of IPTV network management purposes including health monitoring, troubleshooting and performance evaluation, etc. In particular, we develop a tool to convert raw router syslogs to meaningful network events. In addition, by analyzing set-top box (STB) logs, we propose a series of models to capture both channel popularity and dynamics, and users' activity on the IPTV network.
98

Performance evaluation of on demand multicast routing protocol for ad hoc wireless networks

Khan, Nabeel Pervaiz. January 2009 (has links)
Thesis (M.S.)--University of Delaware, 2009. / Principal faculty advisor: Charles G. Boncelet, Dept. of Computer & Information Sciences. Includes bibliographical references.
99

The design, implementation and evaluation of a reliable multicast protocol for ethernet switched networks

Ding, Shiling. Yuan, Xin. January 2003 (has links)
Thesis (M.S.)--Florida State University, 2003. / Advisor: Dr. Xin Yuan, Florida State University, College of Arts and Sciences, Dept. of Computer Science. Title and description from dissertation home page (viewed Apr. 7, 2004). Includes bibliographical references.
100

Ultrasound image processing and transmission for medical diagnosis /

Zheng, Xing. January 2003 (has links)
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references (leaves 66-69). Also available in electronic version. Access restricted to campus users.

Page generated in 0.3569 seconds