Positioning system and positioning method capable of being used indoors

Abstract

The invention discloses a positioning system and a positioning method capable of being used indoors. The positioning system capable of being used indoors includes the following four parts of: a mobileterminal, an LBS base station, a WPS base station and a positioning service center. The mobile terminal and the LBS base station can communicate with each other. The LBS base station and the positioning service center can communicate with each other. The WPS base station and the LBS base station can communicate with each other. The mobile terminal is connected with the positioning service centerthrough the LBS base station. The WPS base station is connected with the positioning service center 104 through the LBS base station. Through employing the system of the invention, impacts caused by network jitters on precise positioning can be avoided, and precise indoor positioning is achieved.

Description

technical field [0001] The invention relates to target positioning technology, in particular to an indoor positioning system and positioning method. Background technique [0002] People travel more and more inseparable from electronic maps, positioning and navigation services. [0003] Early radio positioning systems, such as the Roland system, Meridian navigation system, and China's Changhe system, were mainly used in coastal defense and shipping, and have already been eliminated by the Global Navigation Satellite System (GNSS). Currently available wide-area positioning service systems include six satellite navigation systems including GPS, BDS, GLONASS, GALILEO, IRNSS and QZSS. GPS, BDS, GLONASS, GALILEO have achieved global coverage. [0004] During the GNSS positioning process, the terminal tracks multiple satellites at the same time, and receives positioning messages from multiple satellites at the same time. The terminal selects signals from at least 4 satellites wit...

AI Technical Summary

Problems solved by technology

[0009] The disadvantages of UWB are: 1). A complete positioning network is required, and the support of 3 positioning base stations is required at any positioning point. If the number of base stations is reduced, the positioning accuracy will be greatly affected; 2). Obstacles that block radio transmission; 3). The basis of UWB positioning is that the base station needs to be synchronized, and even a slight network out-of-sync will lead to a relatively large deviation in positioning accuracy

[0021] GNSS signals are not available indoors, and the network and base stations are used to forward GNSS signals. Due to network jitter and congestion, the network transmission time is uncontrollable, and it is also unavailable; A-GPS technology combined with satellite positioning technology and base station-assisted positioning technology is for The dependence on GNSS is too high. When there is no satellite signal, A-GPS has actually degenerated into base station positioning (LBS positioning), and the positioning accuracy is far from meeting the general application requirements; most of the existing local positioning technologies have put forward New requirements, single function and high networking cost, so the feasibility is relatively poor

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