Wireless sensor network node three-dimensional positioner of leader intelligent choice mechanism

Abstract

Disclosed is a wireless sensor network node three-dimensional positioner of a leader intelligent choice mechanism. The invention provides the wireless sensor network node three-dimensional positioner of the leader intelligent choice optimization based on received signal intensity distance measurement and on a biology heuristic method. A simple animal group leader preference mode is designed, a leader searcher obtains one leader candidate group, abilities of each candidate leader are evaluated, an optimal individual is selected as a leader, and the leader represents a globally optimal solution in positioner optimization problems. The problem of three-dimensional node positioning is abstracted into a nonlinearity unconstrained optimization problem by defining a three-dimensional node positioning objective function to which distance measurement is taken fully consideration, then the nonlinearity unconstrained optimization problem is solved by utilizing a leader intelligent choice optimization algorithm, and the solution is the three-dimensional coordinate estimated value of the node positioner. The wireless sensor network node three-dimensional positioner is easy to achieve, node positional accuracy is improved, calculation complexity is reduced, and the effect of range errors on the result is small.

Description

technical field [0001] The invention belongs to the technical field of self-positioning of wireless sensor network nodes. Background technique [0002] Three-dimensional node localization in Wireless Sensor Networks (WSN) is one of the current research hotspots. In WSN node positioning, the commonly used ranging methods include Received Signal Strength (RSS), Time Of Arrival (TOA) and Time Difference Of Arrival (TDOA). However, the ranging methods using TOA and TDOA require accurate time synchronization and additional hardware costs, while ranging based on RSS does not require additional hardware costs, and has low communication overhead and low computational complexity. Therefore, node positioning based on RSS ranging It is one of the most widely used node positioning technologies at present. [0003] In order to improve the node localization accuracy while reducing the computational power consumption of the nodes, a variety of node locators based on RSS ranging have been...

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Problems solved by technology

[0004] Aiming at the problems of low positioning accuracy and large amount of calculation of WSN three-dimensional nodes based on RSS distance measurement, the present invention provides a three-dimensional locator for wireless sensor network nodes with a leader intelligent selection mechanism, which combines heuristic leader intelligent selection (Leader Intelligent Selection, LIS) positioning optimization algorithm is applied to WSN three-dimensional node positioning, which effectively improves node positioning accuracy, reduces computational complexity, and is less affected by ranging errors

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