An Environmental Friendly Routing with Channel Allocation for Underwater WSNs

For decades, along with more and more countries paying attention to the exploitation of marine resources, underwater wireless sensor networks (UWSNs) have become a promising technology in monitoring marine environment and exploring the oceans. Due to the characteristics of water medium, acoustic communication is regard as the best choice for UWSNs. However, some marine mammals also communicate bu using acoustic signal and the frequencies of the natural acoustic systems are heavily overlapped with the frequencies used by underwater acoustic networks (UAN). As an improvement of our previous work VMOPR (a virtual void-based marine organism protection routing protocol), in this paper, we propose an environment friendly protection routing protocol with channel allocation for UWSNs aming to avoid the harmful interference with marine mammals. Considering the restriction of noise and practical link capacity, a channel allocation algorithm is designed to achieve the maximum utilization of limited frequencies. Simulation results show that the proposed scheme outperforms the counterparts EEIAR and VBF protocol in terms of throughput and energy efficiency when taking marine mammals and transmission constraints into account.