Research On Simulation Technology Of Underwater Acoustic Sensor Networks Based On Ns2

The underwater sensor networks are emerging network technology. It has extensive applications in oceanographic data collection, disaster warning, pollution monitoring, offshore exploration, navigational assistant and underwater military defense. The underwater sensor networks are composed of a number of sensors and unmanned crafts which are deployed to perform collaborative monitoring tasks over a given area.The underwater sensor networks use underwater acoustic communication, because of underwater acoustic communication's complexity, mainly on the questions of low bandwidth, high latency, high error rate and severe multi-path effects. These problems cause that the terrestrial wireless communication network technology cannot be directly applied to underwater acoustic sensor networks.Network simulation is a robust technology to study, analyze, design and validate the performance of underwater sensor networks. This paper constructs the simulation environment of the underwater acoustic communications on NS2 and testifies it with MAC protocols.This paper introduces the application prospects, communication technology of the underwater acoustic sensor networks and introduces the features and the simulation model of NS2. Then we compare the differences between underwater acoustic communication and wireless radio communication. After that, we realize the underwater acoustic communication environment on NS2 according to three important features of low bandwidth, high error rate and high latency. Finally, we compare the MAC protocols with the underwater acoustic communication environment based on NS2.