A state-based media access control method for underwater sensor networks

Abstract

The invention relates to the technical field of network communication, in particular to a media access control method for an underwater sensor network. A state-based underwater sensor network media access control method of the present invention includes three parts: a discrete probability-based layered distributed spread spectrum code allocation algorithm, a state-based channel access control mechanism, and transmission power control. The present invention controls channel access based on the status information of the receiving node in the neighbor table, avoids interference caused by transmitting data to the node in the sending state in the half-duplex system, and solves the long delay caused by the traditional RTS / CTS handshake mechanism in the underwater sensor network , high energy consumption and channel idle and other problems; reduce the near-far effect of CDMA and improve energy efficiency. The present invention is suitable for underwater sensor network communication with sparse or dense topology, and as an effective and practical technical solution, it has promising application prospects in underwater data collection, environmental monitoring, disaster prevention, resource monitoring and the like.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a media access control method for an underwater sensor network Background technique [0002] Underwater sensor network (UWSN) has attracted great attention of researchers due to its broad application prospects in environmental monitoring, resource exploration, disaster prevention, etc. The underwater sensor network adopts underwater acoustic communication. The high bit error rate, long propagation delay, and low bandwidth of the underwater acoustic channel make traditional ground communication protocols unable to be directly applied to UWSN. Compared with traditional modems, UWSN acoustic modems are very energy-intensive; the nodes are powered by batteries, and it is difficult to charge and replace batteries in harsh underwater environments; due to the high price, the deployment of underwater nodes is relatively sparse, and most nodes will be lost at any tim...

AI Technical Summary

Problems solved by technology

Some literature points out that the optimal payload length of UWSN data packets is on the order of 100 bytes, while the length of RTS / CTS packets is dozens of bytes, which is not very small compared with UWSN data packets, so the RTS / CTS handshake mechanism is limited. The benefits are not obvious

On the contrary, due to the characteristics of low bandwidth, high delay, and high energy consumption of the underwater acoustic communication system, the RTS / CTS handshake mechanism greatly prolongs the end-to-end delay, reduces throughput, and increases energy consumption.

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