A study of throughput performance in 802.11b wireless Lan.

• Other Authors: Nam, Chung Ho.
• Format: Others
• Language: English; Chinese
• Published: 2003
• Subjects: IEEE 802.11 (Standard); Wireless LANs; Wireless communication systems
• Online Access: http://library.cuhk.edu.hk/record=b5891716; http://repository.lib.cuhk.edu.hk/en/item/cuhk-324199

Nam Chung Ho. === Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. === Includes bibliographical references (leaves 68-71). === Abstracts in English and Chinese. === Chapter Chapter 1 --- Introduction --- p.1 === Chapter 1.1 --- Overview and Motivation --- p.1 === Chapter 1.2 --- Organization of the Thesis --- p.5 === Chapter Chapter 2 --- Background --- p.6 === Chapter 2.1 --- Basics of 802.11 Standard --- p.6 === Chapter 2.1.1 --- Distributed Coordination Function (DCF) / Point Coordination Function (PCF) --- p.7 === Chapter 2.1.2 --- RTS/CTS --- p.8 === Chapter 2.2 --- Types of Networks --- p.9 === Chapter 2.3 --- Automatic Repeat request (ARQ) in 802.11b --- p.11 === Chapter 2.3.1 --- Importance of Link-layer ARQ in Wireless Networks --- p.12 === Chapter 2.3.2 --- MAC Algorithm of 802.11b Standard --- p.13 === Chapter 2.3.3 --- Modified MAC algorithm in 802.11b commercial products --- p.14 === Chapter 2.4 --- Automatic Adjustment of Radio Data Rate in Commercial 802.11b Products --- p.15 === Chapter Chapter 3 --- Head-of-Line Blocking in Access Points --- p.17 === Chapter 3.1 --- Cause of HOL blocking in 802.11b --- p.17 === Chapter 3.1.1 --- Calculation of Worst-Case Service Time for Packet at Head of Queue --- p.19 === Chapter 3.2 --- Simulation Settings --- p.21 === Chapter 3.2.1 --- Propagation Models Available in NS2 --- p.21 === Chapter 3.2.2 --- Variables of Shadowing Model --- p.25 === Chapter 3.3 --- Simulation Results on UDP --- p.26 === Chapter 3.4 --- Experimental Results on UDP --- p.28 === Chapter 3.5 --- Simulation Results on TCP --- p.32 === Chapter 3.6 --- Experimental Results on TCP --- p.34 === Chapter 3.7 --- Possible Solutions of HOL Blocking Problem --- p.35 === Chapter 3.7.1 --- Weakening Link-layer ARQ in 802.11b --- p.36 === Chapter 3.7.2 --- Effectiveness of ARQ in 802.11b --- p.37 === Chapter 3.7.2.1 --- Set-up for Network Experiments --- p.38 === Chapter 3.7.2.2 --- Results and Analysis --- p.39 === Chapter 3.7.3 --- Virtual Queuing --- p.45 === Chapter Chapter 4 --- Study of Uplink Traffic --- p.50 === Chapter 4.1 --- Poor Pulling Down the Rich --- p.51 === Chapter 4.2 --- Signal Capturing Effect --- p.53 === Chapter 4.2.1 --- Mathematical Analysis of Signal Capturing Effect --- p.55 === Chapter Chapter 5 --- Packet Loss Patterns in 802.11b WLAN --- p.61 === Chapter 5.1 --- """Random Loss"" vs ""Bursty Loss""" --- p.61 === Chapter 5.2 --- Experimental Evaluation --- p.62 === Chapter Chapter 6 --- Conclusion --- p.65 === Bibliography --- p.68