a study on the spectrum efficient multi-hop wireless network

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Figure 3.14: Number of users vs. Message Delivery Rate (Adopted from reference [14]) With further increment in number of users, no change was observed which explains why there was no difference in PDR with the increase in number of users in our simulation results in Fig 3.13. The same conditions were simulated with the ART value of 0.25 sec instead of the default values as shown in Fig 3.15. The PDR values exhibit a significant improvement at 4m/s and 10m/s speeds. In general, the PDR values were between 1 and 0.8 for all number of stations which is considered to be high. The result was as expected because with smaller ART values, the network will be capable of adapting to the topology change as a result of station movement. Again, the increased number of station did not impact the PDR values as explained in the pervious case. 33
Figure 3.15: Speed vs PDR for 50, 60 and 70 at 0.25 sec ART 3.8.3 Third scenario This simulation focuses on the relation between the number of hops against PDR and the end-to-end delay in a stationary wireless multi-hop Ad-hoc network. The network is composed of 6 stations arranged in a way to achieve maximum of 5 hops as shown in Fig 3.16. The number of hops will be changed after each simulation (5,4,3,2,1) while measuring the delay and packet delivery rate. The parameters used in this simulation are summarized in Table 3.3. The station transmission power was changed to 0.00128mW due to the change in the simulated area. The distance between stations was fixed at 20m. In this simulation, the area map was not utilized because the stations are not mobile in this scenario. Table 3.3: Second model Simulation parameters Parameter Value Active Route Timeout 3 sec (Defualt), 0.25 sec Simulated time 900 seconds WLAN protocol 802.11g Bit rate 11 Mbps Station coverage distance 20 meter Station transmission power 0.00128 mW Station movement speed 0m/s(stationary) Encoding type Constant Bit Rate (CBR) Packet Inter-Arrival time 0.25 seconds Packet size 64 byte (512 bits) Traffic generation start time [0,10] with uniform distribution 34
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 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 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
Page 62 and 63: As mentioned before, it was shown i
Page 64 and 65: Basically, the experiments are cate
Page 66 and 67: Figure 5.2: AirMagnet Surveyor inte
Page 68 and 69: The directional coupler is a passiv
Page 70 and 71: Figure 5.7: Throughput vs. SIR (Int
Page 72 and 73: Figure 5.10: Three hop WMN with two
Page 74 and 75: Table 5.2:Throughput of Mutli-hop W
Page 76 and 77: PathLoss ( dB) = 40 + [35log10 D( m
Page 78 and 79: Figure 5.17: Actual Interference ca
Page 80 and 81: Figure 5.20: Attenuation value vs.
Page 82 and 83: Figure 5.22 illustrates the S 21 pa
Page 84 and 85: link. The experimental results show
Page 86 and 87: Scenario A.1 This scenario simulate
Page 88 and 89: Destination address Table Table A.1
Page 90 and 91: Figure B.2: Attenuation value vs. t
Page 92 and 93: [10] S Gowrishankar, T G Basavaraju
Page 94 and 95: [32] Jing Zhu and Roy, S., “802.1

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