Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Indoor positioning method for goal nodes of mobile social network

A target node, indoor positioning technology, applied in the field of indoor positioning of mobile social network target nodes, can solve the problems of high complexity, large amount of calculation, limited computing power and storage space, etc., to achieve the effect of improving accuracy and meeting positioning requirements

Inactive Publication Date: 2012-07-18
NORTHWESTERN POLYTECHNICAL UNIV
View PDF5 Cites 62 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above method has high complexity and a large amount of calculation, and the nodes in the wireless sensor network have strong computing power, which can realize the above method. Competent for high-intensity computing

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Indoor positioning method for goal nodes of mobile social network
  • Indoor positioning method for goal nodes of mobile social network
  • Indoor positioning method for goal nodes of mobile social network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Step 1: Initialize the anchor node;

[0022] At least three access points AP are placed at different positions and known coordinate points as reference nodes, which are generally called anchor nodes. After the anchor node is placed, record the location information and name information of the anchor node.

[0023] Step 2: collect experimental data;

[0024] Perform RSSI ranging at different distances from the anchor node, obtain the corresponding RSSI sample values, and store the distance-RSSI data pair, and establish a relationship model between WiFi wireless signal strength RSSI and distance based on the data pair; this is true for each anchor node Conduct experiments to obtain the relationship model of signal strength and distance of all anchor nodes.

[0025] RSSI ranging is generally based on a theoretical model of signal transmission. What adopted in the present invention is the logarithmic distance path loss model, and its loss model is:

[0026] P L (d)=P L...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an indoor positioning method for goal nodes of a mobile social network. The indoor positioning method comprises the following steps of: respectively placing at least three access points AP in different positions, using known coordinate points as anchor nodes, obtaining a relational model between signal strengths and distances of all the anchor points, obtaining the signal strength value of each signal by using a mobile smart terminal, selecting the anchor nodes with the strongest signal strengths as the nodes needing to particle in positioning, respectively putting the three anchor nodes into the relational model between the RSSI (Received Signal Strength Indication) and the distances of the corresponding anchor nodes, and working out the distances from the mobile smart terminal to the corresponding anchor nodes; and working out the position coordinates of the mobile smart terminal by using an angular positioning algorithm. According to the indoor positioning method, the positioning of mobile nodes can be realized in a mobile social network environment, the impact of the environment on positioning is overcome to a certain extend, thereby the positioning accuracy is improved, and the positioning requirement can be basically satisfied in the mobile social network environment.

Description

technical field [0001] The invention relates to a method for locating an indoor target node in a mobile social network, in particular to a method for realizing accurate geometric positioning based on average ranging by using the signal strength received by a mobile intelligent terminal device in a mobile social network. Background technique [0002] In recent years, with the rapid development of Internet applications and the deepening of related technologies, the concept of social network has been mentioned more and more. A social network is a social structure composed of many nodes. In a social network, nodes are used to represent individuals, and edges are used to connect individuals who have contacts or other interactive relationships. This network is defined by the interrelationships between physical objects. On the basis of social network, the concept of mobile social network (Mobile Social Network) was proposed and became a research hotspot in recent years. Mobile s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04W64/00
Inventor 於志文封云郭斌倪红波孙健惟
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com