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The traditional MAC protocol in ad hoc networks includes carrier sensing to judge the busy/idle state of a channel. However, in airborne tactical networks, the results of carrier sensing are usually inaccurate due to the wide distribution of nodes, large communication distance, and high-dynamic network topology, and the carrier sensing causes a large transmission delay and low channel utilization...
Scenarios for simulation are important for the performance of the Vehicular Ad hoc Networks. The paper proposed a more realistic scenario-the City Section Mobility Model and the Radio Propagation Model with Obstacles. They were added in NS2, and the performance of the routing protocol was simulated in the traditional scenario and the new one. Then the performance of DSR and AODV is simulated and analyzed...
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