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Wireless Ad Hoc and Sensor Networks

Wireless Ad Hoc and Sensor Networks

Wireless Ad Hoc and Sensor Networks

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300 <strong>Wireless</strong> <strong>Ad</strong> <strong>Hoc</strong> <strong>and</strong> <strong>Sensor</strong> <strong>Networks</strong>a packet size of 256 bytes (octets), st<strong>and</strong>ard 802.11 DATA frameheader of 18 bytes (octets), size of RTS frame 24 bytes (octets), CTSframe — 18 bytes (octets), ACK frame — 20 bytes (octets), <strong>and</strong> backoffadding 5-bytes (octets) duration for each packet transmission.Section 6.6Problem 6.6.1: Redo the example in Section 6.6.1 for a r<strong>and</strong>om placementof 150 nodes <strong>and</strong> in the presence of fading <strong>and</strong> shadowingusing CBR data.Section 6.8Problem 6.8.1: Simulate the power control system from Table 5.4 forpower levels ranging from 1 mW to 1 W. Assume signal attenuationto change linearly first from 50 to 100 dB, <strong>and</strong> then from100 to 80 dB. The noise level is equal to 90 dBm.1. Use exact (real) values for power level transmission.2. Use rounded (integer) values for power level (in mW).3. Use rounded (integer) values for power levels (in dBm).4. Repeat (3) with Equation 6.34 <strong>and</strong> Equation 6.39 applied toadjust power <strong>and</strong> readings for discreet levels (NOTE: assumethat Pt_0 is the exact power level calculated by DPc algorithm,<strong>and</strong> Pt_k is the corresponding discreet power level to be used;using Equation 6.34, calculate the matching SNR_k.)Section 6.9Problem 6.9.1: Using Equation 6.58, calculate stable state value ofparameter G. Assume that, Q = 0.5, R = 2.4, <strong>and</strong> E{Po} = 0.1 W.(NOTE: Assume that stable state is reached if the difference betweenthe consecutive values G k <strong>and</strong> G k-1 differ less than 0.0001.) SeeTable 6.9.1.TABLE 6.9.1Dynamic Programming Parameter CalculationkN 0.500N1N2N3...G k

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