Wireless Ad Hoc and Sensor Networks

Optimized Energy and Delay-Based Routing 4215102712SRC49BS161138FIGURE 8.52Network schematic.equipped with a high transmission power, 100-mW, 802.15.4 module toincrease the BS range for beam signals.8.11.1 Description of the Experimental ScenarioExperimental scenarios were performed with 12 nodes placed in the topologyillustrated in Figure 8.52. The topology was then modified by theamount of energy available in each node to perform testing of the protocol’sability to provide dynamic optimal routing based on energy, delay,and distance. Testing demonstrates the ability of the OEDSR protocol toevenly balance the energy consumed in the entire network besides providingsuitable delay in the transmission of packets.8.11.2 Experiment ResultsThe network performance is measured in terms of throughput, E2E delay,drop rate, and number of total dropped packets. Experiments wererepeated for varying energy levels at each node, thus enforcing routechanges. In Table 8.3, the performance measurements are shown for thesix experimental cases. Each test was run for 3 min and an average resultis shown. The experimental scenarios were prepared to generate four-hoproutes thus providing comparable data sets. Throughput and E2E delayare consistent across all six cases, because the routing algorithm selectsan optimal route regardless of energy distribution in the network. Variancein the number of dropped packets and in the drop rate is attributedto the distribution of packet collisions. In Table 8.4, a comparison of