Mobile terminal location method, device and system based on wave beam training

Abstract

The present invention discloses a mobile terminal location method, device and system based on wave beam training. The location method comprises the steps of: emitting location requests for at least two stations by a mobile terminal; receiving wave beam training messages sent by the stations, marking the maximum receiving signal intensity received by each station, feeding back codeword informationcorresponding to the maximum receiving signal intensity to each station; receiving the location information sent by the stations through different measurement wave beams, and marking the receiving signal intensity of the measurement wave beams of each station; calculating the propagation principal diameter azimuths of the stations according to the receiving signal intensity ratios of different wave beams and an antenna swing angle; and estimating the position coordinates of the mobile terminal through adoption of the position coordinates and the propagation principal diameter azimuths of eachstation according to a space geometry relation. The mobile terminal location method, device and system employ the wave beam training process to obtain the information required by the measurement of the propagation principal diameter azimuth of each station, are little in cost and high in location precision, and can eliminate the influences of millimeter wave atmospheric absorption and rainfall declination.

Description

technical field [0001] The invention provides a mobile terminal positioning method, device and system based on beam training, belonging to the technical field of wireless communication. Background technique [0002] With the development of the mobile Internet, the number of mobile terminals accessing the communication network is increasing, location-based services are becoming more and more popular, and the demand for high-speed transmission and precise communication is becoming increasingly urgent. The extremely narrow beam characteristics and a large number of spectrum resources of the millimeter wave make it a research hotspot for the next generation communication network. The short-wavelength characteristics of millimeter waves make the size of antennas for millimeter wave communications smaller. The reduction in antenna size is conducive to the deployment of large-scale antenna arrays, and the fast fading problem of millimeter waves can be compensated by array gain. ...

AI Technical Summary

Problems solved by technology

Millimeter wave communication is seriously affected by atmospheric absorption and rainfall fading, and the error of using RSS ranging is large, which is not conducive to all-weather work

While TOA requires precise clock synchronization between base stations and mobile terminals, TDOA requires precise time synchronization between base stations, which is difficult to achieve in practice

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