Wireless Ad Hoc and Sensor Networks

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Adaptive and Probabilistic Power Control Scheme 481100Minimum distance of 6 metersPercentage of time achieving desired range9080706050403020PPC beta (0.1, 0.1)10PPC beta (2, 2)DAPC05 10 15 30 45 60Number of readers in the networkFIGURE 10.10Percentage of time desired range is achieved with number of readers.2.5Minimum distance of 6 metersAverage detection range (meters)21.510.5PPC beta (0.1, 0.1)PPC beta (2, 2)DAPC05 10 15 30 45 60Number of readers in the networkFIGURE 10.11Average detection range with number of readers.
482 Wireless Ad Hoc and Sensor Networksaverage 30% of the readers will be switched off for each time intervalwhereas the other 30% transmit at full power. Hence, readers in full powerhave a greater probability of attaining the desired range, whereas theaverage detection range is sacrificed for this achievement. The relativelypoor performance in average detection range compared to DPC and PPCBeta(2, 2) can be observed in Figure 10.11.Although the percentage of time a target range is achieved is low forBeta(2, 2), it provides the best average detection range of all three algorithms.DAPC with the selective backoff scheme finds a balance betweenthe two evaluation metrics. These show that there is a trade-off betweenpercentage times the target range and average detection range areachieved.The average detection range and percentile plots can also be producedby fixing the number of readers and varying the minimum distancebetween any two readers. Shown in Figure 10.12 and Figure 10.13, DAPCis seen to converge as the minimum distance between any two readersdecreases, which again verifies the theoretical conclusions for the powerupdate scheme. With the same explanation as discussed previously, PPCwith Beta(0.1, 0.1) performs better in achieving desired range, whereasBeta(2, 2) gives better average detection range.100Network with 15 nodesPercentage of time achieving desired range9080706050403020PPC beta (0.1, 0.1)10PPC beta (2, 2)DAPC05 6 7 9 11 14Minimum distance between readers (meters)FIGURE 10.12Percentage of time the target range is achieved with minimum distance.
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Wireless Ad Hocand SensorNetworksPr
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18. Chaos in Automatic Control, edi
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CRC PressTaylor & Francis Group6000
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Table of Contents1 Background on Ne
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3 Congestion Control in ATM Network
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5.4.2 Distributed Power Controller
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7.3 Adaptive and Distributed Fair S
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9.2.2 Overview.....................
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the number of connections in each l
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y Maheswaran Thiagarajan, and tirel
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2 Wireless Ad Hoc and Sensor Networ
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10 Wireless Ad Hoc and Sensor Netwo
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2BackgroundIn this chapter, we prov
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Background 51u(k)x n (k + 1)x n (k)
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Background 53with x( 0)being the in
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Background 55with tr(.) the matrix
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Background 57nGiven a function ft (
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Background 592.3.2 Lyapunov Stabili
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Background 61as well as Jagannathan
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Background 63The subsequent example
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Background 65Evaluating this along
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Background 67Now, select the feedba
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Background 69is SISL if and only if
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Background 71L 1 (x)L(x, t)L 0 (x)0
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Background 73for some R > 0 such th
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Background 75Evaluating the first d
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Background 77Section 2.4Problem 2.4
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100 Wireless Ad Hoc and Sensor Netw
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4Admission Controller Design for Hi
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Admission Controller Design for Hig
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7Distributed Fair Scheduling in Wir
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Distributed Fair Scheduling in Wire
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8Optimized Energy and Delay-Based R
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9Predictive Congestion Control for
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