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Collaborative correction information screening method for wireless sensor network cooperative positioning

A wireless sensor network and cooperative positioning technology, applied in the field of positioning and navigation, can solve the problems of high algorithm execution complexity and large calculation amount, and achieve the effect of reducing the amount of calculation and high cooperative positioning accuracy

Inactive Publication Date: 2018-11-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, since the algorithm uses the particle approximation method to solve the distribution function, when the number of user nodes in the network is large or the coordinate estimation range is large, it will generate a large amount of calculation and high algorithm execution complexity

Method used

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  • Collaborative correction information screening method for wireless sensor network cooperative positioning
  • Collaborative correction information screening method for wireless sensor network cooperative positioning
  • Collaborative correction information screening method for wireless sensor network cooperative positioning

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Embodiment Construction

[0026] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Cooperative correction information screening method for wireless sensor network cooperative positioning such as figure 1 and figure 2 shown in the figure It is the process of the node's own state transition. This step predicts the state of the node through its own measurement information. Represents the likelihood function of the ranging information between node i and node j. It contains the information of node i's own state prediction at time t and recursive state estimation at time 0~t-1. is the state estimation information of node i at time t after self-prediction and collaborative correction. Indicates the collaborative information flowing from node j to node i at time t, including the self-state prediction information and relative ranging information of node j at time t.

[0028] It mainly includes the following steps:

[002...

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Abstract

The invention discloses a collaborative correction information screening method for wireless sensor network cooperative positioning, belonging to the field of positioning navigation. The method includes the following steps: (1) initializing the location probability distribution of all nodes and anchor points; (2) enabling all nodes to predict distribution functions of their own locations accordingto their own motion states; (3) enabling each node to be connected to other nodes through a network, and enabling different nodes to exchange positioning data with each other; (4) enabling the adjacent nodes to perform ranging by radio and visual means, and calculating collaborative correction information between the nodes; (5) calculating the contribution degree of all the collaborative information, performing priority ordering on the collaborative correction information according to the size of contribution degree, and eliminating the information with low contribution degree; (6) calculating the edge posterior probability of the node i at time t; and (7) returning to the step (4), and performing iterative calculation until the location information formula (as shown in the original specification) converges. The scheme of the invention has higher real-time performance when the number of the nodes in the network is large and the range of location estimation is large.

Description

technical field [0001] The invention discloses a collaborative correction information screening method for wireless sensor network cooperative positioning, which belongs to the technical field of positioning and navigation. Background technique [0002] In wireless sensor networks, location information, as important information of network services, plays an important role in application fields such as emergency rescue and disaster relief, traffic management, and indoor navigation. Wireless sensor network cooperative positioning technology is one of the mainstream means to provide continuous and reliable location information. It can break through the limitations of non-cooperative positioning technology. The transmission between user nodes can improve the positioning accuracy of itself. [0003] Belief propagation algorithm is one of the mainstream algorithms in network cooperative positioning. The algorithm determines the position coordinates of each user node by solving th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/029H04W4/02H04W64/00
CPCH04W4/023H04W4/029H04W64/00
Inventor 熊骏熊智李一博罗玮陈明星王云舒许建新
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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