Wireless Ad Hoc and Sensor Networks

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Distributed Power Control of Wireless Cellular and Peer-to-Peer Networks 195807060Total power consumed plotOptimalBambosSSCDCSOPCTotal power504030201000 5 10 15 20Time units25 30 35 40FIGURE 5.9Total power consumed.1009080OptimalBambosSSCDCSOPCOutage probability706050403020100 5 10 15 20Time unitsCSOPCSSCDBambosOptimal25 30 35 40FIGURE 5.10Outage probability.
196 Wireless Ad Hoc and Sensor NetworksAll links are assumed to attain the same target value for SIR definedas γ = 5. Each new link, at a random time instant, tries to attain thetarget SIR starting with an initial power value of p i = 10 −5units. An upperlimit on the power with which each link transmitter can transmit is setas p max = 5 units. Each new link is given a predefined amount of admissiontime T i to achieve the target SIR. If it is able to attain the target SIRduring T i , it is declared active, allowed to transmit to the receiver for acertain predefined amount of service time; and thereafter, it terminatestransmission. Optimal power control and SSCD schemes allow the newlinks to gradually power up and attain the target SIR value. The schemesmaintain the SIR value of the active links above the target γ while thenew links are gaining access to the channel. A new link, according tothe scheme, is admitted only if it maintains the system’s stable stateeven after its addition.Several scenarios are considered, and the proposed DPC/ALPschemes are evaluated. In SSCD and optimal control schemes, in additionto error in SIR Equation 5.12, the cumulative sum of errors (El-oseryand Abdullah 2000) is also considered for the simulation. As a result,the feedback gains are selected as ki = [ k1 k2].To compare the performanceof our scheme with that of Bambos et al. (2000), the simulationenvironment is chosen as seen in Figure 5.11. Eleven nodes with500S-Transmitting node (source) & R-Receiving node4504004S4R9S9RDistance in meters3503002502001501001S2S1R3S2R3R6S7S6R8S7R8R5010S 10R 5S 5R 11S 11R00 50 100 150 200 250 300 350 400 450 500Distance in metersFIGURE 5.11Link placements.
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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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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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Optimized Energy and Delay-Based Ro
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9Predictive Congestion Control for
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Predictive Congestion Control for W
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10Adaptive and Probabilistic Power
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Adaptive and Probabilistic Power Co
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