7.1. Experiment 1. To study the effect of anchor nodes’ variation
Experiment 1 performed to study the effect of the anchor nodes’ percentage on the total number of nodes in a network. By keeping a total number of nodes constant at 200, any percentage variation in the anchor nodes also alters the percentage of the unknown nodes in the network but in the opposite direction only. Here the simulation is performed in a bounded region of \(100\times 100\). The communication range of each node is kept constant at 15 units.
Fig. 7 shows the performance of DV-Hop, IDV, and ODR; when the communication range is not affected by any attenuation i.e. under the ideal situation where no ranging error is applicable. Similarly, figures 9, 10, and 11 exhibits the performance with the raging error of 0- 10%, 0- 20%, and 0- 30% respectively.
In this experiment, it is illustrated that DV-Hop, IDV, and ODR improves its localization accuracy or decreases the localization error with the increase of the anchor nodes’ percentage. This reduction in localization error is evident just because of the improvement in hop size. A better-estimated hop size can assess the distance between an anchor node and an unknown node with more accuracy.