Underwater wireless sensor network positioning method

Abstract

The invention provides an underwater wireless sensor network positioning method. A wireless sensor network comprises three types of nodes, namely buoy nodes, anchor nodes and ordinary nodes. The buoy nodes are satellite positioning nodes, the anchor nodes are in communication with the buoy nodes so that the anchor nodes can be positioned, and the anchor nodes and a part of positioned ordinary nodes constitute a reference node set. The ordinary nodes are in communication with the part of reference nodes in the reference node set so as to be positioned. When the anchor nodes are out of operation, the positioned ordinary nodes assist the ordinary nodes which can not be positioned to be positioned, positioning incapacity information does not need to be aggregated to a gateway, the ordinary node positioning problem is solved by itself in a region, thus, the positioning coverage rate is increased, and the node out-of-operation effect is reduced.

Description

technical field

[0001] The invention belongs to the technical field of wireless communication, in particular to an underwater wireless sensor network positioning method. Background technique

[0002] Different from terrestrial wireless sensor networks, the underwater environment is extremely complex, such as nodes moving with the water flow, difficult battery replenishment, high delay of underwater acoustic channels, low bandwidth and high bit error rate, which make it difficult to study positioning schemes in water.

[0003] As we all know, ordinary GPS cannot work underwater. In order to enable nodes to locate themselves underwater, an underwater GPS system has been proposed, such as: GPS intelligent buoy GIB (GPS Intelligent Buoys) and PARADIGM (a GPS system that provides precise positioning) program). These underwater GPS systems rely primarily on surface buoys to provide accurate position information, and these buoys act like GPS satellites. All nodes within the buoy ...

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