P2P (peer-to-peer)-based underwater acoustic sensor network system and data transmission method thereof

Abstract

The invention relates to a P2P (peer-to-peer)-based underwater acoustic sensor network system and a data transmission method thereof. The data transmission method is characterized in that a plurality of underwater acoustic sensors are arranged in water to carry out data collection, data are subjected to network encoding in a random linear encoding manner, then routing nodes are selected according to the geographic positions of underwater acoustic sensor nodes to carry out data transmission so as to progressively forward the data to the underwater acoustic sensor nodes close to the water surface by utilizing the communication between an underwater acoustic transducer and the other underwater acoustic sensor nodes until the data are forwarded to a relay node on the water surface, and the data are sent to aggregation nodes on the shore by the relay node through GPRS (General Packet Radio Service). According to the P2P-based underwater acoustic sensor network system and the data transmission method thereof, the distribution of the aggregation nodes is not limited by the geographic position and the distance in the conventional underwater acoustic sensor network system structure, and the data unloading completeness and the data transmission rate can be guaranteed under the condition that the packet loss probability of an underwater acoustic channel link is relatively high, so that the energy consumption caused by retransmission of redundant data packets in a network is effectively reduced, and the service life of the underwater acoustic sensor network system is further prolonged.

Description

technical field [0001] The invention relates to a P2P-based underwater acoustic sensor network system and a data transmission method thereof, belonging to the technical field of sensor network applications. Background technique [0002] Underwater acoustic sensor network is a new research field resulting from the combination of underwater acoustic communication technology and sensor network technology. The underwater acoustic sensor network can carry out medium and long-term underwater early warning, water quality pollution monitoring, and marine hydrological environment element monitoring for the area covered by the underwater acoustic sensor nodes, and has broad applications in marine military security fields such as target tracking and identification, intrusion detection, etc. Application prospects. [0003] Since the underwater acoustic sensor network is deployed underwater and uses sound waves for communication, and the propagation speed of sound waves underwater is 5 ...

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Problems solved by technology

In order to ensure the quality of data transmission, the physical distance deployed between sink nodes is very limited

In addition, the deployment density of underwater acoustic sensor nodes is limited due to the characteristics of high cost, high energy consumption and long delay of underwater acoustic communication.

Therefore, the

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