Wireless Ad Hoc and Sensor Networks

Adaptive and Probabilistic Power Control Scheme 477from 4 to 14 m and the maximum size of the coordinate is adjustedaccordingly. The number of readers is changed from 5 to 60 to createdenser network and to test the scalability of the proposed schemes. Eachsimulation scenario is executed for 10,000 iterations.10.5.3 Evaluation MetricsTo demonstrate the typical performance of the reader network, the cumulativerange distribution of a reader can be plotted. In Figure 10.5, thecumulative density function F(x) of read range x for a reader using DAPCis plotted. From this plot, we can observe the minimum and maximumdetection range as well as the percentile of attainment of certain ranges.To evaluate the performances of the proposed algorithms, the metricsaverage read range, percentage of time the desired range is attained,average output power, and average interference experienced are evaluatedacross all readers for each scenario and simulation results are given.10.5.4 Results and AnalysisIn Figure 10.6, the output power, interference level, and detection rangeat a particular reader are plotted vs. time for the DAPC in a dense network.It is seen that the DAPC attempts to achieve the desired range by increasing1Empirical CDF0.90.80.70.6F(x)0.50.40.30.20.100 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2xFIGURE 10.5Cumulative density function of the read range for a reader using DAPC.