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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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Distributed Fair Scheduling in <strong>Wireless</strong> <strong>Ad</strong> <strong>Hoc</strong> <strong>and</strong> <strong>Sensor</strong> <strong>Networks</strong> 351Totaldata per Joule (Kbits/J)43.532.521.510.50Data transmitted per Joule (cluster topology)12 cluster, 8 sensors per cluster, duration 20s6 8 10 12 14 16 18 20Per-flow rate (Kbps)Sleeping mode + DPCDPC802.11FIGURE 7.25Total data transmitted per joule.Example 7.6.3: Fairness Results during Intense TrafficIn this simulation, topology shown in Figure 7.28 is used where the mainobjective is to test the fairness of the scheduling protocol. Clusters numbered0 to 5 generate steady traffic flows of 150 kbps toward BS. Thecluster 6, where the unusual event occurs, generates higher traffic of 200 kbps.Totaldata (Mbits)43.532.521.510.50Totaldata transmitted (cluster topology)20 clusters, 8 sensors per cluster, duration 20s1 2 3 4 5Per-flow rate (Kbps)DPC + sleep modeDPC802.116 7 8 9 10FIGURE 7.26Total data for varying per flow rates.

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