Energy-saving and Fault-tolerant Topology for Underwater Acoustic Sensor Networks

Underwater acoustic sensor network is an important part of the ocean Internet of Things. For the problem that the energy of sensor nodes is limited and the nodes are prone to random failure due to the complex ocean environment, this paper presents an energy saving and fault tolerant topology for underwater acoustic sensor network. Firstly, the energy consumption of underwater acoustic sensor network is analyzed based on the characteristics of water acoustic communication. And the communication radius of each node is analyzed by considered the underwater communication delay and the node energy. Secondly, the classic scale-free structure which can tolerant random node failure is introduced into the underwater acoustic sensor network. Then the fault topology of underwater acoustic sensor network is generated. Finally, the performance of the generated underwater acoustic sensor network topology is verified by simulation experiments. The experimental results show that the generated topology has the scale-free property which can effectively tolerate the failure of random nodes and can prolong the network lifetime.