Self-localization method for mobile underwater acoustic network based on dynamic reference node selection
A technology of reference node and underwater acoustic network, which is applied in the service, wireless communication, transmission system and other directions based on location information, can solve the problems of low positioning accuracy and large number of anchor nodes, etc. The effect of reducing the demand for anchor nodes
Active Publication Date: 2020-08-18
CHANGAN UNIV
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Problems solved by technology
[0007] In order to solve the problems of large number of anchor nodes and low positioning accuracy in the prior art, the present invention proposes a mobile underwater acoustic network self-positioning method based on dynamic reference node selection for a mobile underwater acoustic network with a small number of anchor nodes, which improves a small amount of Network self-localization accuracy in case of anchor nodes
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[0047] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0048] The mobile underwater acoustic network in this method is a three-dimensional network randomly deployed in any water area. The network consists of three anchor nodes and several common nodes, assuming that the communication between nodes in the network is reachable by one hop. The anchor node is a node fixedly deployed underwater and its absolute position information is known, and the anchor node does not drift with the ocean current; the ordinary node is a node with unknown position information, and the node is freely deployed in the water and moves with the ocean current, wind and waves And so on to produce drifting motion. Since there are only three anchor nodes in the network, it is not enough to realize the node self-location of the three-dimensional mobile underwater acoustic network. Therefore, this method dynamically selects the reference node that...
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The invention relates to a mobile underwater acoustic network self-positioning method based on dynamic reference node selection. By dynamically selecting the reference nodes capable of assisting the anchor nodes to complete the whole self-positioning process in the common nodes, the common nodes with unknown positions can communicate with the anchor nodes or the dynamically selected reference nodes, then the position information of the common nodes is calculated, and the mobile underwater acoustic network self-positioning based on a small number of anchor nodes is completed. The anchor node requirement in the self-positioning of the mobile underwater acoustic network is effectively reduced. Through a dynamic reference node selection mechanism, the selection of the network reference nodes is dynamically updated to optimize the topological structure between the anchor nodes and the reference nodes in the mobile underwater acoustic network, and the self-positioning precision of the mobileunderwater acoustic network under a small number of anchor nodes is improved.
Description
technical field [0001] The invention belongs to the technical field of underwater acoustic communication and underwater acoustic network, and in particular relates to a self-positioning method for a mobile underwater acoustic network. Background technique [0002] Network node self-location is one of the supporting technologies of underwater acoustic networks. It can be used to identify the location of monitoring data sources, implement routing protocols based on node locations, and data storage technology based on geographic location. It is used in marine engineering construction, marine resource development and The protection of national maritime rights and interests plays an extremely important role in many aspects. [0003] An anchor node refers to a node whose position coordinates are known in the network. An unknown node can directly or indirectly interact with the anchor node to calculate its own position. Due to the problems of low communication rate, narrow bandwid...
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IPC IPC(8): H04W4/02H04W64/00H04W40/20H04W40/02H04B13/02
CPCH04B13/02H04W4/02H04W4/023H04W40/02H04W40/20H04W64/00H04W64/006
Inventor 高婧洁花飞梅毫迪
Owner CHANGAN UNIV