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Control node, method and system for asynchronous positioning

A positioning method and control node technology, applied in positioning, radio wave measurement system, measurement device, etc., can solve problems such as extra overhead, deployment difficulties, and positioning errors

Active Publication Date: 2013-10-09
TSINGHUA UNIV +1
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  • Summary
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Problems solved by technology

[0021] In view of the above problems, it is necessary to provide an asynchronous positioning method and system to solve the additional overhead and deployment difficulties caused by the existing time-of-arrival method and time-difference method of arrival and the clock synchronization between reference nodes in the system, as well as the radio frequency delay at the front end of the receiver. The positioning error caused by time-varying pair

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  • Control node, method and system for asynchronous positioning
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  • Control node, method and system for asynchronous positioning

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Embodiment Construction

[0089] see figure 2 , figure 2 Shown is a network topology diagram of the asynchronous positioning system 10 in the preferred embodiment of the present invention. The asynchronous positioning system 10 includes a reference tag N with a known position, a tag L to be positioned with an unknown position, and at least four reference nodes with known positions. In this embodiment, the present invention is described by taking the asynchronous positioning system 10 including four reference nodes M1-M4 with known positions as an example. The reference nodes M1-M4 can be base stations with known locations; the label L to be located can be a mobile station, such as a mobile phone; the reference label N can be a base station or a mobile station with a known location.

[0090] Let the coordinates of the four reference nodes M1-M4 be: (x 1 ,y 1 ,z 1 ), (x 2 ,y 2 ,z 2 ), (x 3 ,y 3 ,z 3 ), (x 4 ,y 4 ,z 4 ); The coordinates of the reference label N are: (x 0 ,y 0 ,z 0 ); th...

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Abstract

Provided is a method for asynchronous positioning. The method for the asynchronous positioning comprises the following steps of (1) sending an order data packet to a reference label with a known position; (2) receiving time differences output by four reference nodes, wherein the time difference output by each reference node is a difference between the time when a reference measuring signal is received by each reference node and the time when a positioning measuring signal is received by each reference node, each reference measuring signal is output when the reference label receives a first order data packet, and each positioning measuring signal is output by a label to be positioned; (3) calculating the position coordinate of the label to be positioned according to the position coordinate of the reference label, the position coordinate of each reference node, and the time difference of each reference node. The invention further relates to a control node and a system for the asynchronous positioning, and the system for the asynchronous positioning is provided with the control node.

Description

technical field [0001] The invention relates to radio positioning technology, in particular to an asynchronous positioning method, a control node using the method and an asynchronous positioning system with the control node. Background technique [0002] Radio positioning is of great significance in the fields of important item tracking, location-based services, and safe production. Currently existing wireless positioning methods are generally divided into the following three categories: [0003] (1) Method based on Received Signal Strength Indication (RSSI); [0004] (2) Method based on Angle of arrival (AOA); [0005] (3) Methods based on time of arrival can be further divided into direct use of Time of Arrival (TOA) method, two-way time of arrival (TW-TOA) method and Time Difference of Arrival (Time Difference of Arrival) method. , TDOA) method three. [0006] Among the above three methods, the time-of-arrival method can make full use of the multipath resolution abili...

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Application Information

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IPC IPC(8): G01S5/06
Inventor 葛宁陈曦王天东裴玉奎
Owner TSINGHUA UNIV
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