Abstract
In recent years, underwater acoustic sensor networks (UASNs) have become a promising research field. Due to the limited energy of underwater nodes and highly dynamic acoustic link status, it is a challenge to balance the performance of reliability and energy consumption for existing routing schemes. In this paper, an adaptive cooperation-based geographic segmented opportunistic routing protocol (ACGSOR) for UASNs is proposed. ACGSOR is a geographic and opportunistic routing protocol which restricts the number of relay nodes. To deal with the void region problem and reduce energy consumption, a novel local topology-aware strategy is designed to obtain two-hop node information. With the local topology information, the proposed routing segmentation scheme divides the end-to-end path into several short opportunistic routing segments. Furthermore, a cooperation mechanism is applied to switch the transmission mode adaptively. Simulation results show that, compared with existing protocols, ACGSOR can improve the network performance in different scenarios.
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