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Indoor and outdoor seamless positioning method based on cellular network and Wi-Fi technology fusion

A seamless positioning, cellular network technology, applied in location-based services, wireless communication, wireless communication services, etc., can solve the problem of low outdoor positioning accuracy of cellular network, and the positioning algorithm cannot be smoothly transitioned, so as to reduce hardware costs. The effect of spending money and improving positioning accuracy

Inactive Publication Date: 2017-07-14
CENT SOUTH UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the outdoor positioning accuracy based on the cellular network is not high, and the indoor and outdoor positioning algorithm cannot be stable and excessive, and provide a seamless indoor and outdoor positioning method based on the fusion of cellular network and Wi-Fi technology

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  • Indoor and outdoor seamless positioning method based on cellular network and Wi-Fi technology fusion
  • Indoor and outdoor seamless positioning method based on cellular network and Wi-Fi technology fusion
  • Indoor and outdoor seamless positioning method based on cellular network and Wi-Fi technology fusion

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Embodiment Construction

[0024] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described in detail in the order of the basic principle, macro flow and specific steps in combination with the basic theory and formula drawings below.

[0025] The experimental area is selected in the School of Physics and Electronics of the new campus of Central South University in Changsha City, Hunan Province, and the correctness of the algorithm is verified by using the RSSI variation degree of different standard cellular networks inside and outside the building. This algorithm involves the signal strength of the outdoor cellular network and the indoor Wi-Fi RSSI value, which need to be divided into two steps: the construction of the fingerprint database in the offline stage and the positioning of unknown nodes in the online stage. According to the change of the RSSI value, Adopt corresponding positioning methods t...

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Abstract

The invention discloses an indoor and outdoor seamless positioning method based on cellular network and Wi-Fi technology fusion. The indoor and outdoor seamless positioning method comprises the steps of: firstly, utilizing cellular networks of different systems to carry out cooperative positioning so as to improve positioning precision for the problem that positioning precision of an outdoor cellular network is not high; secondly, increasing a convergence rate to reduce calculation load, and performing Wi-Fi indoor positioning by adopting a position-fingerprint algorithm based on KNN; and finally, performing indoor and outdoor positioning switching by adopting a fingerprint switching algorithm based on Euclidean distance, and setting a threshold value according to the magnitude of an error probability P of judgment errors occurred in the switching process, thereby achieving the purpose of smooth switching. The positioning algorithms disclosed in the invention are simple in process and low in complexity, and can realize real-time positioning on an intelligent terminal easily; meanwhile, by selecting the cellular networks and Wi-Fi signals widely existing in people's life for positioning, the hardware overhead required in the positioning process is greatly reduced, and the indoor and outdoor seamless positioning method has a certain social and economic benefits.

Description

technical field [0001] The invention relates to the field of indoor and outdoor seamless positioning, in particular to an indoor and outdoor seamless positioning method based on the integration of cellular network and Wi-Fi technology. Background technique [0002] With the continuous expansion and deepening of wireless network, mobile communication and pervasive computing technology, location-aware computing and location-based services are becoming more and more important, and people's demand for positioning and navigation is increasing. People have higher and higher requirements for positioning accuracy and availability of location information services. Simple indoor or outdoor positioning technology can no longer meet the growing high-tech needs. The diversity of indoor and outdoor positioning methods is becoming more and more obvious, but high-precision indoor and outdoor wireless Seam positioning technology is still in the exploratory stage. [0003] In recent years, w...

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Application Information

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IPC IPC(8): H04W4/02H04W4/04H04W64/00
CPCH04W4/023H04W64/00
Inventor 李长庚王海洋邱正阳
Owner CENT SOUTH UNIV
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