A novel cross-layer cognitive decision mechanism and a related mammal-friendly detour routing protocol for underwater cognitive acoustic networks are proposed to overcome the interference among the marine mammals and the manmade acoustic system
which share the limited acoustic spectrum in ocean. The mammals are considered as the primary user and the interference region of mammals-nodes is determined. The routing protocol is designed to avoid the interference between the sensor nodes and the mammals. Simulation results and comparisons with the existing VBF and HHVBF routing protocols show that the proposed routing protocol increases the packet delivery ratio by 52.6% and 22.5% and reduces the energy consumption of a data packet by 40.4% and 56.8%
respectively. These results indicate that this scheme overcomes the routing failure problem caused by marine mammals' interference.
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