a study on the spectrum efficient multi-hop wireless network

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List of Figures Figure 1.1: Infrastructure network ....................................................................................... 2 Figure 1.2: Ad-hoc network ................................................................................................ 2 Figure 1.3: Relay multi-hop wireless network ...................................................................... 3 Figure 1.4: Mesh multi-hop wireless network....................................................................... 3 Figure 1.5: Proposed indoor multi-hop network.................................................................... 6 Figure 1.6: Thesis organization ........................................................................................... 7 Figure 2.1: Data forwarding to unknown destination............................................................. 9 Figure 2.2: AODV vs. OLSR .............................................................................................11 Figure 2.3: Route discovery process .................................................................................. 13 Figure 2.4: Higher mobility can improve connectivity ........................................................ 15 Figure 2.5: Increased number of stations improves route discovery time .............................. 16 Figure 3.1: Simulated Area Map........................................................................................ 18 Figure 3.2: AODV vs. OLSR ............................................................................................ 20 Figure 3.3: Random Waypoint Mobility Model .................................................................. 21 Figure 3.4: Random Waypoint Mobility Model .................................................................. 22 Figure 3.5: Proposed Mobility Model ................................................................................ 22 Figure 3.6: Throughput vs. Speed for random waypoint and the new mobility model ............ 23 Figure 3.7:Coverage area and movement direction ............................................................. 25 Figure 3.8: Simulated Ad-hoc mobile network ................................................................... 27 Figure 3.9: Example of Convergence time in the simulation ................................................ 29 Figure 3.10: Simulation scenarios ..................................................................................... 30 Figure 3.11: Active Route timeout vs. PDR........................................................................ 30 Figure 3.12: Number of RERR/second as a function of the ART, for each RERR[23]............ 31 Figure 3.13: Speed vs PDR for 50, 60 and 70 stations at default value of ART (3sec) ............ 32 Figure 3.14: Number of users vs. Message Delivery Rate (Adopted from reference [21]) ...... 33 Figure 3.15: Speed vs PDR for 50, 60 and 70 at 0.25 sec ART............................................. 34 Figure 3.16: Simulated Ad-hoc mobile network.................................................................. 35 Figure 3.17: Number of hops vs. Delay.............................................................................. 35 Figure 3.18: Number of hops vs. PDR ............................................................................... 36 Figure 4.1: The exposed node problem .............................................................................. 39 Figure 4.2: Multi-radio Wireless Mesh Network................................................................. 40 Figure 4.3: IEEE 802.11 Non-overlapping channels (adopted from [34]).............................. 41 Figure 4.4: Interference in Multi-radio AP ......................................................................... 43 Figure 4.5: Interference cancellation Circuit....................................................................... 44 Figure 4.6: Phase Shift and cancel..................................................................................... 45 viii
Figure 4.7: S 21 Parameter comparison................................................................................. 46 Figure 5.1:IPN-W100AP Trinity Security Systems access points ......................................... 49 Figure 5.2: AirMagnet Surveyor interface .......................................................................... 51 Figure 5.3: SIR measurement using Signal generator .......................................................... 52 Figure 5.4: Directional Coupler......................................................................................... 52 Figure 5.5: SIR vs Throughput (Continuous Interference) ................................................... 53 Figure 5.6: SIR measurement using two interfering networks.............................................. 54 Figure 5.7: Throughput vs. SIR (Interference with co-channel WLAN)................................ 55 Figure 5.8: Three hop WMN with Single radio AP ............................................................. 55 Figure 5.9: Number of hops vs. throughput for one radio AP ............................................... 56 Figure 5.10: Three hop WMN with two radios AP .............................................................. 57 Figure 5.11: Number of hops vs. throughput for two radio AP (2.4GHz and 5GHz)............... 57 Figure 5.12: Single radio vs. Multi-radio ........................................................................... 58 Figure 5.13: Single access point field intensity................................................................... 60 Figure 5.14: Received signal power versus range in a corridor............................................. 61 Figure 5.15: Received signal power measurement points in the corridor............................... 61 Figure 5.16: Interference cancellation Circuit connected on two radios AP........................... 62 Figure 5.17: Actual Interference cancellation Circuit .......................................................... 63 Figure 5.18: Two-hops WMN with cancellation circuit ....................................................... 63 Figure 5.19: S 21 Parameter ................................................................................................ 64 Figure 5.20: Attenuation value vs. throughput .................................................................... 65 Figure 5.21: Two hop WMN in closed corridor with cancellation circuit .............................. 66 Figure 5.22: S 21 Parameter................................................................................................ 66 Figure A.1: The Simulated Area map................................................................................. 70 Figure A.2: Throughput vs. ART ....................................................................................... 71 Figure A.3: Throughput vs. NHT/HI.................................................................................. 72 Figure B.1: Attenuation value vs. throughput ..................................................................... 74 Figure B.2: Attenuation value vs. throughput ..................................................................... 75 ix
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 10 and 11: Table of Contents Abstract in Japan
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
Page 60 and 61: 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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