a study on the spectrum efficient multi-hop wireless network

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Table of Contents Abstract in Japanese ................................................................................................................ i Abstract ................................................................................................................................. iii Acknowledgments ....................................................................................................................v Table of Contents.................................................................................................................... vi List of Figures ...................................................................................................................... viii List of Tables ............................................................................................................................x List of Abbreviations .............................................................................................................. xi 1 Introduction..................................................................................................................... 1 1.1 IEEE 802.11 Wireless LAN overview .......................................................................... 1 1.2 Multi-hop Topology.................................................................................................... 3 1.3 Spectral efficiency...................................................................................................... 4 1.4 Interference problem.................................................................................................. 5 1.5 Future Trends............................................................................................................ 5 1.6 Purpose of the Research............................................................................................. 6 1.7 Thesis overview.......................................................................................................... 8 2 Mobile Ad-hoc Network ................................................................................................... 9 2.1 Introduction .............................................................................................................. 9 2.2 Ad-hoc On Demand Distance Vector (AODV) ........................................................... 10 2.3 Route Discovery in AODV routing protocol............................................................... 12 2.4 Multi-hop wireless network ...................................................................................... 13 2.5 Active Route Timeout and Mobility........................................................................... 14 2.6 User density and capacity ......................................................................................... 15 2.7 Chapter Summary.................................................................................................... 16 3 Packet Delivery Rate (PDR) Improvement for Mobile Ad-hoc Network (MANET) ........ 17 3.1 Introduction ............................................................................................................ 17 3.2 Previous Simulation model....................................................................................... 17 3.3 Comparison with other Related Researches............................................................... 20 3.4 Proposed Mobility models......................................................................................... 23 3.5 Packet Delivery Rate (PDR) ..................................................................................... 26 3.6 Simulation setting and parameters............................................................................ 26 3.7 Convergence time .................................................................................................... 28 3.8 Simulation scenarios and results .............................................................................. 29 3.8.1 First Scenario ...................................................................................................... 30 3.8.2 Second Scenario................................................................................................... 32 3.8.3 Third scenario...................................................................................................... 34 vi
3.8.4 Forth scenario ..................................................................................................... 36 3.9 Chapter summary .................................................................................................... 37 4 Interference Cancellation for Wireless Mesh Network (WMN) Nodes............................ 38 4.1 Introduction ............................................................................................................ 38 4.2 Exposed Terminal phenomenon................................................................................ 39 4.3 Multi-radio Wireless Mesh Network (WMN) ............................................................. 40 4.4 IEEE 802.11 non-overlapping channels.................................................................... 41 4.5 Interference suppression .......................................................................................... 42 4.5.1 Interference in multi-radio equipment................................................................... 42 4.6 Related interference suppression researches.............................................................. 43 4.7 Proposed interference cancellation circuit................................................................. 44 4.7.1 Phase cancellation ............................................................................................... 44 4.7.2 Scattering Parameters .......................................................................................... 46 5 Improvement of the Throughput of Indoor Multi-hop Network ..................................... 48 5.1 Introduction ............................................................................................................ 48 5.2 Experiment procedure and equipment....................................................................... 49 5.3 Field experiment scenarios....................................................................................... 52 5.3.1 Scenario 1: Throughput vs Signal to Interference (SIR) Ratio characteristics......... 52 5.3.2 Scenario 2: Throughput vs. number of hops.......................................................... 55 5.3.3 Scenario 3: Channel selection vs. throughput........................................................ 58 5.3.4 Scenario 4: Throughput measurement for distance varying and hop count in Indoor closed corridor environment. ............................................................................................... 60 5.3.5 Scenario 5: Interference cancellation experiment for 2 hops WMN........................ 62 5.3.6 Chapter summary................................................................................................. 67 6 Conclusion ..................................................................................................................... 68 Appendix A ............................................................................................................................ 70 Simulation of route stat hold time parameter in AODV and OLSR ........................................ 70 Scenario A.1....................................................................................................................... 71 Scenario A.2....................................................................................................................... 72 Destination address Table.................................................................................................... 73 Appendix B ............................................................................................................................ 74 Interference cancellation .................................................................................................... 74 References: ............................................................................................................................ 76 Publications ........................................................................................................................... 80 vii
Page 1: A STUDY ON THE SPECTRUM EFFICIENT M
Page 4 and 5: Copyright @ 2009 by WADHAH HAFIDH A
Page 6 and 7: 、上記条件下で、4 m/s
Page 8 and 9: The WMN experiments showed that the
Page 12 and 13: List of Figures Figure 1.1: Infrast
Page 14 and 15: List of Tables Table 2.1: Compariso
Page 16 and 17: CHAPTER 1 Introduction 1.1 IEEE 802
Page 18 and 19: The performance of a random media a
Page 20 and 21: 1.4 Interference problem Interferen
Page 22 and 23: On the other hand, the backbone net
Page 24 and 25: CHAPTER 2 Mobile Ad-hoc Network 2.1
Page 26 and 27: Route Request AODV Intermediate nod
Page 28 and 29: Request (RREQ) [4] in order to iden
Page 30 and 31: DATA Motion Figure 2.4: Higher mobi
Page 32 and 33: CHAPTER 3 Packet Delivery Rate (PDR
Page 34 and 35: Table 3.1: Simulation Parameters Pa
Page 36 and 37: oute stat hold time parameter in th
Page 38 and 39: speed values due to the ability of
Page 40 and 41: Figure 3.7:Coverage area and moveme
Page 42 and 43: Figure 3.8: Simulated Ad-hoc mobile
Page 44 and 45: Figure 3.9: Example of Convergence
Page 46 and 47: oute. This caused the 10m/s speed t
Page 48 and 49: Figure 3.14: Number of users vs. Me
Page 50 and 51: Figure 3.16: Simulated Ad-hoc mobil
Page 52 and 53: 3.9 Chapter summary Four simulation
Page 54 and 55: suppressing channel interference is
Page 56 and 57: The two radios provide the ability
Page 58 and 59: Figure 4.4: Interference in Multi-r
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Figure 4.6: Phase Shift and cancel
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As mentioned before, it was shown i
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Basically, the experiments are cate
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Figure 5.2: AirMagnet Surveyor inte
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The directional coupler is a passiv
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Figure 5.7: Throughput vs. SIR (Int
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Figure 5.10: Three hop WMN with two
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Table 5.2:Throughput of Mutli-hop W
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PathLoss ( dB) = 40 + [35log10 D( m
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Figure 5.17: Actual Interference ca
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Figure 5.20: Attenuation value vs.
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Figure 5.22 illustrates the S 21 pa
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link. The experimental results show
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Scenario A.1 This scenario simulate
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Destination address Table Table A.1
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Figure B.2: Attenuation value vs. t
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[10] S Gowrishankar, T G Basavaraju
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[32] Jing Zhu and Roy, S., “802.1
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