Method and system for realizing indoor positioning by using virtual time synchronization

A virtual synchronization and indoor positioning technology, applied in time division multiplexing systems, synchronization devices, multiplexing communications, etc. Improves accuracy and eliminates the effect of accumulating errors

Active Publication Date: 2018-05-29
重庆脉实智能制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TDOA measurement technology is a key technology in the time difference positioning system, and its measurement accuracy is directly related to the positioning accuracy of the system; , multiple synchronizations between anchor nodes also cause error accumulation, affecting subsequent positioning accuracy

Method used

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  • Method and system for realizing indoor positioning by using virtual time synchronization
  • Method and system for realizing indoor positioning by using virtual time synchronization
  • Method and system for realizing indoor positioning by using virtual time synchronization

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Experimental program
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Embodiment 1

[0030] The embodiment of the present invention provides a method for realizing indoor positioning using virtual time synchronization, such as figure 1 As shown, it mainly includes the following steps:

[0031] Step 1. The virtual synchronization node and the node to be located respectively correspondingly send the virtual synchronization signal and the positioning signal at different times.

[0032] Step 2. Each anchor node receives the virtual synchronization signal and the positioning signal respectively, and sends the virtual synchronization signal and the time stamp contained in the positioning signal, and the time stamp of the received virtual synchronization signal and the positioning signal to the positioning server.

[0033] In the embodiment of the present invention, the time stamp of the virtual synchronization signal is the time stamp of the last transmission of the virtual synchronization signal, and also contains the serial number (used for data alignment) of the current ...

Embodiment 2

[0057] The embodiment of the present invention provides a system for realizing indoor positioning by using virtual time synchronization, which mainly includes:

[0058] Virtual synchronization node, used to send virtual synchronization signal;

[0059] The node to be positioned is used to send a positioning signal; the virtual synchronization signal and the positioning signal are sent at different times;

[0060] The anchor node is configured to receive the virtual synchronization signal and the positioning signal, and send the virtual synchronization signal and the time stamp contained in the positioning signal, and the time stamp of the received virtual synchronization signal and the positioning signal to the positioning server;

[0061] The positioning server is used to extract the above-mentioned data sent by multiple anchor nodes, and based on the timestamp contained in the virtual synchronization signal, map the timestamp of the same positioning signal received by any two anchor ...

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PUM

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Abstract

The invention discloses a method and a system for realizing indoor positioning by using virtual time synchronization. According to the invention, when positioning is carried out, hardware synchronization between anchor nodes is not needed, which saves network resources; since each time of virtual synchronization is a new start, synchronization error accumulation is eliminated, and the accuracy ofindoor positioning is improved; in addition, when virtual time synchronization is carried out, no additional equipment is required; the complexity and computational complexity of a traditional TDOA method are greatly reduced; and the cost is reduced.

Description

Technical field [0001] The invention relates to the field of wireless network technology and indoor positioning systems, and in particular to a method and system for realizing indoor positioning by using virtual time synchronization. Background technique [0002] Due to people’s needs, location-aware positioning is becoming an important demand point in many new computing fields, and the location-aware service industry has brought many new location service applications, such as popular map navigation, indoor personnel monitoring and management, and special hostages. Rescue system and other applications. Although GPS has been widely used in outdoor positioning, its applications in indoor environments are very limited because its signals cannot penetrate roofs and building materials. Smart factory is a typical indoor environment application. The use of location-aware computing services in the smart factory relies on an effective and powerful indoor environment positioning system. ...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04J3/06H04W56/00
CPCH04J3/0667H04J3/067H04W56/001H04W64/006
Inventor 王洪超薛塬杨冬田俐强
Owner 重庆脉实智能制造有限公司
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