Data transmission method used for underwater acoustic sensor network system

Abstract

The invention provides a data transmission method used for an underwater acoustic sensor network system. The method comprises the following steps: (1) a sink node sends control information to a lower level node; (2) each sensor node sends or forwards the control information; (3) each sensor node uploads and forwards data acquired or received by the node itself to an upper level node, wherein when uploading the data, a receiving terminal (an upper level node) returns an acknowledgement frame for each received data frame, a sending terminal (a lower level node) sets a sending window with a length of Ntw, and when not receiving an acknowledgement frame corresponding to a data frame, the sending terminal continuously sends Ntw data frames at most begin with the data frame. According to the invention, a sparse distribution mode requirement is satisfied; each node has a reliable data uploading link; carrying out accurate synchronization and timing are not needed; the method in the invention is suitable for an irregular network shape. According to the invention, in an underwater acoustic channel of a harsh condition, both integrality of data uploading and network transmission efficiency are guaranteed, and data transmission efficiency is effectively raised.

Description

technical field [0001] The invention relates to the technical field of sensor networks, in particular, the invention relates to a data transmission method for an underwater acoustic sensor network system. Background technique [0002] Traditional terrestrial wireless sensor networks are composed of a large number of cheap micro-sensor nodes deployed in the detection area, and form a self-organizing system with a certain topology through wireless communication. It is self-organizing, dynamic, data-centric, and applications are closely related. The nodes in the wireless sensor network can use various types of sensors (such as sound, light, electricity, thermal sensors, etc.). Electromagnetic waves are used as carriers for transmitting data. As far as the topological structure is concerned, the current wireless sensor networks mainly include star network, point-to-point network, self-organizing network and clustering network. It is difficult for the above-mentioned existing ...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the current wireless sensor network and its data transmission method cannot be applied to the underwater application environment, and a new underwater acoustic sensor network system suitable for the underwater application environment is needed

However, the underwater acoustic sensor network system has special problems such as extended signal transmission time, high data integrity requirements, small transmission bandwidth, limited energy for sensor nodes and difficult to replenish, and the existing data transmission methods are difficult to meet the requirements or even not applicable at all. Therefore, there is an urgent need to provide a data transmission method that matches the underwater acoustic sensor network system.

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