An Investigation of the Impact of Signal Strength on Wi-Fi Link ...

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5.3 Phase 2 Measurement .................................................................................................. 79 5.4 Phase 3 Measurement .................................................................................................. 81 5.4.1 WDS with AP Mode .................................................................................................. 82 5.4.2 AP Mode With E<strong>the</strong>rnet Connection ......................................................................... 84 5.4.3 Comments.................................................................................................................. 85 5.5 Capacity Estimation <strong>of</strong> WLAN................................................................................... 86 5.6 Recommendations for Access Point Deployment ...................................................... 88 5.6.1 SOHO Environment .................................................................................................. 89 5.6.2 Medium-sized Business Environment ....................................................................... 90 5.7 Summary....................................................................................................................... 92 CHAPTER 6 IMPLICATIONS AND FUTURE RESEARCH ..........................94 6.1 Implications .................................................................................................................. 94 6.2 Future Research ........................................................................................................... 95 CHAPTER 7 SUMMARY AND CONCLUSIONS...........................................97 REFERENCES ...............................................................................................102 APPENDIX A PRELIMINARY EXPERIMENTAL RESULTS ........................ 111 APPENDIX B PHASE 1 EXPERIMENTAL RESULTS .................................117 APPENDIX C PHASE 1 THROUGHPUT ANALYSIS ..................................140 APPENDIX D PHASE 3 EXPERIMENTAL RESULTS .................................145 APPENDIX E D-LINK PRODUCT SPECIFICATIONS .................................148 - iii -
Attestation <strong>of</strong> Authorship I hereby declare that this submission is my own work and that, to <strong>the</strong> best <strong>of</strong> my knowledge and belief, it contains no material previously published or written by ano<strong>the</strong>r person (except where explicitly defined in <strong>the</strong> acknowledgements), nor material which to a substantial extent has been submitted for <strong>the</strong> award <strong>of</strong> any o<strong>the</strong>r degree or diploma <strong>of</strong> a university or o<strong>the</strong>r institution <strong>of</strong> higher learning. - iv - Signature: Eric LO
Page 1 and 2: An Investi
Page 3: 2.3.5 Signal <stro
Page 7 and 8: Abstract Wireless local area networ
Page 9 and 10: List of Abbreviati
Page 11 and 12: List of Figures Fi
Page 13 and 14: List of Tables Tab
Page 15 and 16: Chapter 1 Introduction There has be
Page 17 and 18: WLAN performance evaluation and ana
Page 19 and 20: Chapter 2 Background and Related Wo
Page 21 and 22: The IEEE 802.11 networks have two o
Page 23 and 24: The coverage of a
Page 25 and 26: 2.2.1 Physical Layer Figure 2.8 sho
Page 27 and 28: throughput significantly at higher
Page 29 and 30: DCF is designed to provide “best-
Page 31 and 32: Figure 2.11: Backof</strong
Page 33 and 34: modulation in [37]. According to si
Page 35 and 36: Figure 2.12: Net throughput <strong
Page 37 and 38: As highlighted in [46, 47], distanc
Page 39 and 40: 2.3.2 Base Station Placement <stron
Page 41 and 42: gained an insight that this would m
Page 43 and 44: proposed to improve WLAN performanc
Page 45 and 46: specifications of
Page 47 and 48: dynamic and complicated. As argued
Page 49 and 50: In addition, we surveyed and review
Page 51 and 52: 4.1 Performance Metrics A stopwatch
Page 53 and 54: Model: DWL-G132 Specification: Sta
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Figure 4.1: WY building layout. - 4
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Figure 4.2 shows wireless configura
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4.4.2 Wireless Adapter Configuratio
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4.4.3 AP Operation Mode Two APs (D-
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meeting room with different distanc
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Scenario 4 In figure 4.12, two APs
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“(H-3.5m)F-H” is the</s
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Figure 4.16: Phase 2 measurement: A
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performed the prop
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The receiver sensitivity is an impo
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In table 5.1, the
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Ethernet connectio
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sufficient signal coverage and thro
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throughput decreases along with low
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In table 5.1, when RSS is larger th
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(for example, measurement point “
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AP at Position “R” Figure 5.13
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The measurement results indicated t
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5.2.2 Throughput An</strong
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impact on RSS and throughput. Resul
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The throughput of
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The RSS of “WDS
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The average throughput of</
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The average data size of</s
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5.6.1 SOHO Environment Due to <stro
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The following notes are needed to b
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when APs were placed at positions
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Real and accurate results for AP pl
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Chapter 7 Summary and Conclusions W
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planning. Propagation measurement (
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deployment. Many WLANs are deployed
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placement in indoor wireless system
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Communications, vol. 2, no. 5, pp.
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[56] J. K. L. Wong, M. J. Neve, and
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eceived signal strength of<
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Appendix A Preliminary Experimental
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2. AP Mode Measurement in t
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7. The Ad-Hoc Mode Measurement on <
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Appendix B Phase 1 Experimental Res
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(P-1.5m)O-P 32.78 -86 193.6 0.453 N
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3. Access Point at Position “E-3M
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(C-5m)C-D 21.63 -83 46.8 1.875 NLOS
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J 9.00 -44 8.2 10.703 LOS (J-1.5m)J
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7. Access Point at Position “H”
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Figure B.2: Throughput map for AP a
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60 40 20 0 -20 -40 -60 -80 -100 Acc
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(N-3m)N-O 15.00 -72 15.6 5.626 NLOS
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(C-3m)C-D 14.32 -74 13.6 6.453 NLOS
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Figure B.8: Throughput map for AP a
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60 40 20 0 -20 -40 -60 -80 -100 Acc
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AP at A RX Position Left-Hand Area
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AP at L RX Position Left-Hand Area
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Appendix D Phase 3 Experimental Res
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TX at 2M from E-3M Data File: 153.6
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IEEE 802.11 b/g Access Point DWL-21
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Standards • IEEE 802.11g • IEEE
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1 Maximum wireless signal rate deri
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Wireless 108G Standards • 802.11b
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Wireless 108G Add 802.11g Wireless
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2.4GHz Omni-Directional 7dBi Indoor
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