Abstract
Underwater sensor networks (UWSNs) are different from terrestrial wireless sensor networks that rely on medium waves like electromagnetic waves. In underwater scenarios, underwater acoustic communication has the characteristics of low bandwidth, high latency, low packet delivery ratio, high interference and high energy consumption, which makes higher requirements for underwater communication. Reliability and effectiveness are two major concerns for routing protocols in UWSNs. In this paper, a sliding window based efficient transmission(SWT) is proposed to address the problem of low delivery ratio. In SWT, the source node is allowed to send multiple packets continuously before stopping and waiting for an acknowledgment. There is no need for the senders to wait for an acknowledgment when a packet is sent, which can aggravate the delivery of the packet. If the packet is lost or transmitted incorrectly, the selective repeat ARQ protocol will be executed. Simulation results show that the proposed protocol outperforms other routing protocols in reliability and effectiveness.
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