Method for positioning mobile station

Abstract

The invention relates to the technical field of a mobile communication system, in particular to a method for positioning a mobile station of GSM standard in the mobile communication system, which comprises the following steps of A. collecting data in the target city and generating a propagation characteristic table with geographical grids as objects; B. acquiring measurement reports and sorting the measurement reports according to each call; C. combining and processing a plurality of continuous measurement reports in the same call; D. corresponding a base station identity code (BSIC) and a broadcast control channel (BCCH) to a cell ID; E. judging whether the call happens indoors according to the combined measurement report, if yes, the positioning of the mobile station is carried out indoors; if not, the call happens outdoors, and we move on to the next step; and F. comparing the similarity of the characteristic data of the combined measurement report with that of the propagation characteristic table of the geographical grid generated in the step A and finding out the geographical grid of the mobile station, thereby realizing accurate positioning of the mobile station.

Description

technical field [0001] The invention relates to the technical field of mobile communication systems, in particular to a mobile station positioning method of the GSM standard in the mobile communication system. Background technique [0002] In the GSM system of the mobile communication system, the network protocol stipulates that the mobile station in the calling state reports its measurement report to the network side at a period of 480ms. The measurement report includes the serving cell where the mobile station is located, the timing advance and its downlink Receiving field strength, as well as the color code, frequency point and downlink receiving field strength of up to 6 neighboring cells. This information is the basic data source for all current mobile station positioning techniques. [0003] At present, the GSM mobile station positioning technology is mainly based on signal propagation time, radio wave energy attenuation measurement, triangular relationship and calcul...

AI Technical Summary

Problems solved by technology

[0004] The general positioning methods include signal angle of arrival (AOA) positioning, field strength positioning and Cell-ID TA positioning. The accuracy of these positioning methods is low (greater than 300m), and the spacing between base stations in the current city is shrinking (200m to 300m). , this positioning accuracy is even greater than the coverage area of ​​many base station cells, and has no positioning significance

[0005] In response to this situation, some new positioning methods include enhanced observation time difference E-OTD, uplink time difference of arrival positioning TOA, uplink time difference of arrival positioning TDOA and A-GPS, these methods effectively improve the positioning accuracy, but they There are also many restrictions. E-OTD needs to modify the protocol and software upgrade of the mobile station. TOA / TDOA needs to modify the mobile network. A-GPS needs to add hardware modules and software upgrades for positioning. Therefore, these new positioning methods are practical. Poor performance, and the scope of application is difficult to promote, it is not suitable for the whole network mobile station positioning of the whole city mobile network

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