Shipborne node positioning method based on RSSI sequence matching

Abstract

The invention discloses a shipborne node positioning method based on RSSI sequence matching. The method comprises a step of segmenting a region according to the position of an anchor node before positioning and gradually approaching a region where an unknown node is located by using a qualitative relationship between the intensity and distance of a received signal, and a step of realizing the positioning of the unknown node through the region encoding and sequence matching. On the basis of fully considering the complexity of a ship structure, the shipboard node positioning method based on RSSIsequence matching is proposed, and the positioning method is realized by the steps of cutting, library establishment and matching. According to the whole positioning method, the problems of serious metal shielding, a complex structure and signal transmission fluctuation in a shipborne environment are solved to a certain extent, the high positioning accuracy is ensured under low complexity, and the amount of calculation in the positioning process is greatly reduced.

Description

technical field [0001] The invention relates to the field of ship-borne node positioning of intelligent transportation, in particular to a ship-borne node positioning method based on RSSI sequence matching. Background technique [0002] As an important means of water transportation, ships have attracted more and more attention to their own security and information capture. People are actively using various means to improve the refinement of ship information. Among the many information monitoring in the shipboard environment, the acquisition of information on the location of personnel and cargo inside the ship is of great significance to ship safety management, cargo transportation, resource allocation, and emergency rescue after accidents. However, the shipboard environment with numerous cabins, complex structures, and severe metal interference has brought a series of difficulties and constraints to traditional location information monitoring methods. The important applicat...

AI Technical Summary

Problems solved by technology

Among them, the positioning performance of the DV-Hop algorithm depends on the network topology, but the complex ship structure has certain limitations on the network topology; although the centroid algorithm is simple, the positioning error is large, and it cannot be captured relatively accurately in the ship-borne environment. Position information; the APIT algorithm requires a large anchor node density and the calculation process is very complicated, so it is not suitable for use on ships whose own environment is already relatively complex

[0005] In summary, although some node positioning algorithms are quite mature at present, the relatively complex ship-borne environment has greatly constrained these algorithms

Therefore, there is still no comprehensive and systematic method for object positioning based on wireless sensor networks in the shipboard environment.

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