Research On Communication Algorithm For AUV In Underwater Acoustic Sensor Networks

With the advances of ocean exploitation and ocean military technology all over the world, the field of underwater acoustic sensor networks (UWA) has become a new kingdom of computer science with great foreground. Underwater communication applications mostly involve long-term monitoring of selected ocean areas, which will find applications in disaster prevention, object localization and tracking, oceanographic data collection and tactical surveillance applications. More and more researchers from academic world and military world are engaged in the development of UWA due to the great promise and potential in many application areas.The shallow-water acoustic channel differs from radio channel in many aspects. The available bandwidth of the UWA channel is limited and depends on both range and frequency, and the propagation speed in the UWA channel is five orders of magnitude lower than that of the radio channel. Besides, the battery-powered network nodes limit the lifetime of UWA networks. These characteristics show that short range multi-hop, rather than single hop, is widely used in UWA networks to transfer data messages. And it works well for the communication among sensor networks because sensor nodes are immobile. But for the mobile object in UWA networks, it becomes very common that the mobile object has moved before the message reaches its destination, which results in transmission failure. So this paper pays special attention to how to realize reliable communication between mobile autonomous underwater vehicles (AUVs) and other nodes in the networks.Analyzing the mobile object message delivery mechanism in traditional networks, this paper introduces and compares the algorithms which have been proposed worldwide in recent years. This paper uses the concept of agent nodes and proposes a message delivery protocol based on chains of agent nodes, in terms of the algorithms...