Media access control method and system suitable for underwater wireless sensor network

Abstract

The invention discloses a media access control method and system suitable for an underwater wireless sensor network. The method comprises the steps of enabling time of all nodes in the underwater wireless sensor network to be synchronized, enabling receiving nodes to establish delay diagrams and communication process tables of peripheral neighbor node by monitoring communication packets of the peripheral neighbor nodes, judging whether collision can be generated by launching dialogs according to the delay diagrams and the communication process tables, launching dialogs if no collision can be generated, calculating out residual bandwidth of the peripheral neighbor nodes and the time slot number distributed to the peripheral neighbor nodes, sending request message to the peripheral neighbor nodes through the receiving nodes according to the content requirements of control packets, sending data packets to the receiving nodes through the peripheral neighbor nodes according to the content of the request message, and broadcasting and sending response message to the peripheral neighbor nodes after the receiving nodes receive the data packets. According to the media access control method and system suitable for the underwater wireless sensor network, a protocol can reduce the cost for controlling data packets, the space-time multiplex ratio of channels is improved, the utilization rate of the channels is improved, and the communication efficiency is improved.

Description

technical field [0001] The invention belongs to the field of information technology, in particular to a media access control protocol suitable for underwater wireless sensor networks. Background technique [0002] In recent years, terrestrial wireless sensor networks based on short-distance wireless communication have developed rapidly. Underwater wireless sensor network (UWSN) is an extension of the concept of terrestrial sensor networks to underwater applications. As an important application of underwater acoustic communication, underwater wireless sensor network is of great value for target tracking in underwater environment and monitoring of marine hydrological environment elements. Therefore, it is of great application value to carry out related research on underwater wireless sensor network. [0003] Underwater wireless sensor networks use sound waves as signal carriers. The propagation characteristics of sound waves in water are very different from those of radio in ...

AI Technical Summary

Problems solved by technology

[0004] (1) The signal propagation delay is large. The average speed of sound waves in seawater is about 1500 meters per second, which is several orders of magnitude lower than the propagation speed of radio, and the propagation speed of sound waves is affected by temperature, salinity, pressure, water currents and ocean currents. influence of environmental factors

[0005] (2) The communication bandwidth is low, and the bandwidth is only tens of Kbps in the common communication distance

However, due to the large underwater propagation delay, it takes a lot of money to complete a handshake, which greatly reduces the utilization of the channel

However, there is still no good method to solve the above problems

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