Routing Design Based on Data Importance Rating in Underwater Acoustic Sensor Networks

For the underwater acoustic senor networks (UWA-SN), the data carried by different sensor nodes usually has different importance at different moments. In this paper, we propose a data importance rating routing (DI2R) protocol using data importance index for UWA-SN to concern the above issue. In the proposed DI2R scheme, we take not only the data importance rating, but also the residual energy of sensor node and packet loss probability comprehensively into account. Specifically, we analyze two different implementation schemes according to whether to adjust the minimum transmitting power (P-min) of each sensor node in UWA-SN for the proposed DI2R protocol, in terms of energy consumption, death node number, packet loss probability, and transmission distance. The simulation results show that the dynamic P-min DI2R routing scheme has lower energy consumption of UWA-SN and lower packet loss probability compared to the static P-min DI2R routing scheme; But the static P-min DI2R routing scheme has lower node mortality and shorter transmission distance.