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
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  • 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

Method used

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  • 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...

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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

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Application Information

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IPC IPC(8): H04W64/00
Inventor 於志文封云郭斌倪红波孙健惟
Owner NORTHWESTERN POLYTECHNICAL UNIV
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