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  • 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.
1

Synchronization analysis and simulation of a stand IEEE 802.11g OFDM signal /

Lowham, Keith D. January 2004 (has links) (PDF)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, March 2004. / Thesis advisor(s): Frank E. Kragh. Includes bibliographical references (p. 151-153). Also available online.
2

Data-collection capacity of IEEE 802.11-like sensor networks.

January 2006 (has links)
Chan Chi Pan. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references (leaves xiv-xv). / Abstracts in English and Chinese. / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Overview --- p.1 / Chapter 1.2 --- Related Works --- p.1 / Chapter 1.3 --- Our Contributions --- p.2 / Chapter 1.4 --- Organization of the Thesis --- p.3 / Chapter Chapter 2 --- Definitions and Assumptions --- p.5 / Chapter 2.1 --- Data-collection Networks --- p.5 / Chapter 2.2 --- Assumptions --- p.9 / Chapter Chapter 3 --- Canonical Networks --- p.13 / Chapter 3.1 --- Theoretical Analysis --- p.13 / Chapter 3.1.1 --- Fixed Link Distance --- p.13 / Chapter 3.1.2 --- Variable Link Distance --- p.17 / Chapter 3.2 --- Simulation --- p.20 / Chapter Chapter 4 --- Beyond the Assumptions --- p.24 / Chapter 4.1 --- Multiple Interference --- p.24 / Chapter 4.2 --- HFD versus non-HFD performance --- p.27 / Chapter Chapter 5 --- Perfect Scheduling and IEEE 802.11 Scheduling --- p.30 / Chapter 5.1 --- Relationship between Perfect Scheduling and IEEE 802.11 Scheduling --- p.30 / Chapter 5.2 --- Throughput Analysis under IEEE 802.11 scheduling --- p.33 / Chapter Chapter 6 --- General Networks --- p.37 / Chapter 6.1 --- Discussion of HFP --- p.37 / Chapter 6.2 --- HFP Formulation --- p.39 / Chapter 6.3 --- Optimization in Finding Best HFP --- p.43 / Chapter 6.4 --- Experiment --- p.44 / Chapter 6.5 --- NS-2 Simulation --- p.47 / Chapter Chapter 7 --- Applying Canonical Network to General Networks --- p.49 / Chapter 7.1 --- Direct Application --- p.49 / Chapter 7.2 --- Manifold Canonical Network with Shorter Link Distance --- p.51 / Chapter 7.3 --- Robustness on Node Positions in Manifold Canonical Network --- p.54 / Chapter Chapter 8 --- Conclusion --- p.56 / Appendix A RTS/CTS and Power Control --- p.x / References --- p.xiv
3

Performance analysis of 802.11b downlink.

January 2005 (has links)
Wong Tsz-Chun Stanley. / Thesis submitted in: July 2004. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (leaves 58-61). / Abstracts in English and Chinese. / 摘要 --- p.III / ACKNOWLEDGEMENT --- p.IV / LIST OF FIGURES --- p.VIII / Chapter CHAPTER 1 --- INTRODUCTION --- p.2 / Chapter 1.1 --- Introduction --- p.2 / Chapter 1.2 --- Organization of the Thesis --- p.6 / Chapter CHAPTER 2 --- BACKGROUND STUDIES --- p.7 / Chapter 2.1 --- Overview of IEEE 802.11 --- p.7 / Chapter 2.3 --- 802.11b Network Type --- p.10 / Chapter 2.4 --- IEEE 802.11 MAC overview --- p.12 / Chapter 2.4.1 --- Distributed Coordination Function (DCF) / Point Coordination Function (PCF) --- p.13 / Chapter 2.4. --- Request-to-Send (RTS) / Clear-to-Send (CTS) --- p.14 / Chapter CHAPTER 3 --- QUEUE MANAGEMENT IN ACCESS POINTS --- p.16 / Chapter 3.1 --- Introduction --- p.16 / Chapter 3.2 --- Packet Delay Variation in Access Points --- p.17 / Chapter 3.2 --- Simulations Settings and Configuration --- p.19 / Chapter 3.2.1 --- Mobile Networking in NS2 --- p.19 / Chapter 3.2.2 --- Input Parameter of Shadowing Radio Propagation model --- p.22 / Chapter 3.2.3 --- Configuration of the simulation --- p.25 / Chapter CHAPTER 4 --- PERFORMANCE ANALYSIS OF 802.11B DOWNLINKS --- p.30 / Chapter 4.1 --- Introduction --- p.30 / Chapter 4.5 --- Assumptions of the analysis --- p.31 / Chapter 4.3 --- Proposed Queue Management in Access Point --- p.32 / Chapter 4.4 --- Channel error modeling --- p.34 / Chapter 4.5 --- The analytical model of downlinks --- p.35 / Chapter 4.6 --- Performance Calculation --- p.37 / Chapter 4.4 --- Simulation Result --- p.41 / Chapter 4.4.1 --- Extension of NS2 --- p.42 / Chapter 4.4.2 --- Configuration of the simulation --- p.44 / Chapter CHAPTER 5 --- RESOURCE ASSIGNMENT IN ACCESS POINTS --- p.48 / Chapter 5.1 --- Introduction --- p.48 / Chapter 5.2 --- Packet Delay Balancing --- p.49 / Chapter 5.2 --- Simulation Result --- p.51 / Chapter CHAPTER 6 --- CONCLUSION --- p.56 / BIBLIOGRAPHY --- p.58
4

Performance evaluation and enhancement of IEEE 802.11 WLANs: a distributed opportunistic media access control strategy.

January 2007 (has links)
Chen, Darui. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (leaves 62-67). / Abstracts in English and Chinese. / Abstract --- p.i / Acknowledgements --- p.iv / Table of Contents --- p.v / List of Figures --- p.vii / List of Tables --- p.viii / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Motivation --- p.1 / Chapter 1.2 --- Related Works --- p.2 / Chapter 1.3 --- Contributions --- p.6 / Chapter 1.4 --- Organization --- p.8 / Chapter Chapter 2 --- Preliminaries --- p.9 / Chapter 2.1 --- MAC Protocol in IEEE 802.11 WLANs --- p.9 / Chapter 2.1.1 --- IEEE 802.11 DCF --- p.9 / Chapter 2.1.2 --- Performance Anomaly of DCF --- p.11 / Chapter 2.2 --- Multi-Rate WLANs with Rate Adaptation --- p.12 / Chapter 2.2.1 --- PHY-Layer Rate Adaptation Model --- p.12 / Chapter 2.2.2 --- Two Typical WLANs with Rate Adaptation --- p.13 / Chapter Chapter 3 --- Performance Analysis and Evaluation of Multi-Rate IEEE802.11 WLANs --- p.15 / Chapter 3.1 --- Theoretical Analysis of Multi-Rate IEEE 802.11 WLANs --- p.15 / Chapter 3.1.1 --- Markov Chain Model for Backoff Process --- p.15 / Chapter 3.1.2 --- Saturation Throughput --- p.18 / Chapter 3.1.3 --- Theoretical Throughput Limit and Dynamic Backoff --- p.20 / Chapter 3.2 --- Performance Evaluation of Multi- Rate WLANs --- p.22 / Chapter 3.2.1 --- Model Validation --- p.22 / Chapter 3.2.2 --- Theoretical Throughput Limit --- p.24 / Chapter Chapter 4 --- Rate-aware DCF Protocol --- p.30 / Chapter 4.1 --- Proposed R-DCF Protocol --- p.30 / Chapter 4.2 --- Theoretical Analysis of R-DCF --- p.34 / Chapter 4.2.1 --- Markov Chain Model for Backoff Process --- p.34 / Chapter 4.2.2 --- Saturation Throughput --- p.36 / Chapter 4.2.3 --- Simplified Models --- p.39 / Chapter 4.3 --- Performance Evaluation --- p.41 / Chapter 4.3.1 --- Model Validation --- p.41 / Chapter 4.3.2 --- R-DCF with Homogeneous Users --- p.42 / Chapter 4.3.3 --- R-DCF in Fixed-Rate WLANs --- p.49 / Chapter Chapter 5 --- Performance Enhancement of the R-DCF Protocol --- p.52 / Chapter 5.1 --- Maximizing Throughput of R-DCF --- p.52 / Chapter 5.2 --- Offline Adaptive Backoff Methods --- p.55 / Chapter Chapter 6 --- Conclusions --- p.60 / Bibliography --- p.62
5

VoIP capacity over multiple IEEE 802.11 WLANs.

January 2007 (has links)
Chan, An. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2007. / Includes bibliographical references (leaves 80-84). / Abstracts in Chinese and English. / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Motivations and Contributions --- p.1 / Chapter 1.2 --- Related Works --- p.3 / Chapter 1.3 --- Organization of the Thesis --- p.4 / Chapter Chapter 2 --- Background --- p.5 / Chapter 2.1 --- IEEE 802.11 --- p.5 / Chapter 2.1.1 --- Basic IEEE 802.11 Standards --- p.5 / Chapter 2.1.2 --- Types of Networks --- p.7 / Chapter 2.2 --- Voice over IP (VoIP) Codecs --- p.8 / Chapter 2.3 --- VoIP over WLAN --- p.9 / Chapter 2.3.1 --- System Architecture of VoIP over WLAN --- p.9 / Chapter 2.3.2 --- VoIP Capacity over an Isolated WLAN --- p.10 / Chapter Chapter 3 --- VoIP Capacity over Multiple WLANs --- p.12 / Chapter 3.1 --- Topology Settings and Assumptions --- p.12 / Chapter 3.2 --- Low VoIP Capacity Found in NS2 Simulations --- p.16 / Chapter 3.3 --- Applying Frequency Channel Assignment --- p.18 / Chapter Chapter 4 --- Clique Analysis and Call Admission Control --- p.21 / Chapter 4.1 --- Conflict Graph Model and Cliques --- p.21 / Chapter 4.2 --- Cliques in Multi-Cell WLANs --- p.22 / Chapter 4.3 --- Clique-Based Call Admission Control Algorithm --- p.24 / Chapter 4.3.1 --- Algorithm Description --- p.24 / Chapter 4.3.2 --- Algorithm Performance Evaluation --- p.27 / Chapter 4.3.3 --- Clique-Based Admission Control in Three-Frequency- Channel WLAN --- p.29 / Chapter Chapter 5 --- Time Division Multiple Access (TDMA) on IEEE 802.11MAC --- p.32 / Chapter 5.1 --- Coarse-Grained Time-Division Multiple Access (CTDMA) --- p.33 / Chapter 5.1.1 --- Basic Ideas of CTDMA --- p.33 / Chapter 5.1.2 --- Conflict Graph Modeling of CTDMA --- p.35 / Chapter 5.1.3 --- Parameter Values in CTDMA --- p.41 / Chapter 5.2 --- Possible Realization of TDMA on 802.11 Standards --- p.47 / Chapter Chapter 6 --- Coloring Problem in Wireless Networks: A Theoretical Treatment --- p.52 / Chapter 6.1 --- Coloring of One-Dimensional Linear Network --- p.53 / Chapter 6.1.1 --- Network with Same Link Length --- p.53 / Chapter 6.1.2 --- Network with Variable Link Length --- p.54 / Chapter 6.2 --- Coloring of Two-Dimensional Network --- p.63 / Chapter Chapter 7 --- Conclusion --- p.66 / Appendices --- p.69 / References --- p.80
6

Denial of service attacks on 802.1X security protocol /

Ozan, Orhan. January 2004 (has links) (PDF)
Thesis (M.S. in Computer Science)--Naval Postgraduate School, March 2004. / Thesis advisor(s): Geoffrey Xie. Includes bibliographical references (p. 121-122). Also available online.
7

Denial of service vulnerabilities in IEEE 802.16 wireless networks /

Boom, Derrick D. January 2004 (has links) (PDF)
Thesis (M.S. in Systems Engineering)--Naval Postgraduate School, September 2004. / Thesis advisor(s): Rex Buddenberg. Includes bibliographical references (p. 69-70). Also available online.
8

QoS provisioning for IEEE 802.11 MAC protocols

Ge, Ye. January 2004 (has links)
Thesis (Ph. D.)--Ohio State University, 2004. / Title from first page of PDF file. Document formatted into pages; contains xiii, 97 p.; also includes graphics (some col.). Includes bibliographical references (p. 94-97).
9

Performance analysis of IEEE 802.11A signals under different operational environments /

Chan, Hsiung Wei Roy. January 2004 (has links) (PDF)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, Sept. 2004. / Thesis advisor(s): Tri T. Ha, Randy L. Borchardt. Includes bibliographical references (p. 89). Also available online.
10

Wireless local network architecture for Naval medical treatment facilities /

Deason, Russell C. January 2004 (has links) (PDF)
Thesis (M.S. in Information Technology Management)--Naval Postgraduate School, Sept. 2004. / Thesis advisor(s): Alex Bordetsky. Includes bibliographical references (p. 89-93, 95-99). Also available online.

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