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Indoor positioning method and system for RSSI ranging based on iBeacons nodes

An indoor positioning and node technology, used in radio wave measurement systems, location-based services, positioning and other directions, can solve problems such as high positioning costs, high database maintenance costs, nodes affecting the reliability of positioning algorithms, and achieve ranging error. The effect of reducing and ensuring accuracy

Inactive Publication Date: 2016-12-07
武汉创驰蓝天信息科技有限公司
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Problems solved by technology

Although the existing indoor positioning technologies such as WLAN and ultra-broadband radio systems have achieved local indoor high-precision positioning, the cost of positioning is relatively high. At the same time, the maintenance cost of the database using the fingerprint database positioning method is very high. Not only that, the damage of nodes will Seriously affect the reliability of positioning algorithms, which makes the development of indoor location services encounter great resistance

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  • Indoor positioning method and system for RSSI ranging based on iBeacons nodes

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Embodiment Construction

[0033] An indoor positioning method based on RSSI ranging of iBeacons nodes, which includes the following steps:

[0034] S1. Collect the RSSI values ​​of anchor nodes at different positions continuously through the mobile device at a fixed position, and correlate these RSSI values ​​with the distance between the mobile device and the anchor node;

[0035] S2. Preprocess these RSSI values, and establish a ranging model by selecting the normal value corresponding to its distance;

[0036] S3. Collect the RSSI value of the anchor node at an unknown location through the mobile device, and calculate the distance from the mobile device to all anchor nodes through the ranging model;

[0037] S4. Select the four anchor nodes closest to the mobile device, and read their coordinate information;

[0038] S5. Calculate the actual coordinates of the mobile device according to the second weighted centroid algorithm;

[0039] S6. Optimize the positioning coordinates according to the map constraints of...

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Abstract

The invention provides an indoor positioning method for RSSI ranging based on iBeacons nodes. The method comprises the following steps: S1, carrying out continuous and multiple collections of RSSI values of anchor nodes in different positions through mobile equipment in a fixed position, and establishing a corresponding relationship between the RSSI values and distances between the mobile equipment and the anchor nodes; S2, preprocessing the RSSI values, and selecting normal values from the RSSI values and establishing a corresponding relationship between the normal values and the distances to establish a ranging model; S3, collecting the RSSI values of the anchor nodes through the mobile equipment in unknown positions, and calculating the distances between the mobile equipment and all the anchor nodes through the ranging model; S4, selecting the four anchor nodes which are the nearest to the mobile equipment, and reading coordinate information of the four anchor nodes; S5, calculating the actual coordinates of the mobile equipment through the re-weighted centroid algorithm; and S6, optimizing the positioning coordinates according to map restrictions of an actual environment. The invention further provides an indoor positioning system for RSSI ranging based on the iBeacons nodes.

Description

Technical field [0001] The invention relates to the technical field of indoor positioning, in particular to an indoor positioning method and system based on RSSI ranging of iBeacons nodes. Background technique [0002] With the development of science and technology and the continuous changes of human activities, the indoor environment is further expanded and the layout is becoming more and more complex. People’s demand for location information is also increasing. More and more indoor positioning technologies are used in location determination and indoor Navigation, social entertainment, information recommendation and other fields. [0003] Different from outdoor positioning, indoor positioning is generally in a relatively closed environment, the scale and range of positioning are relatively small, the indoor environment is complex, and the direct wave path is seriously affected. Therefore, indoor positioning is in positioning accuracy, reliability, and safety. , Complexity, direct...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/04H04W64/00G01S5/02
CPCG01S5/02H04W4/023H04W64/00
Inventor 张浩刘芬
Owner 武汉创驰蓝天信息科技有限公司
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