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5G base station time synchronization error elimination method based on known coordinate reference station

A technology of time synchronization error and known coordinates, which is applied to services based on location information, wireless communications, electrical components, etc., to achieve the effects of simple and convenient implementation, improved user experience, and important market value

Pending Publication Date: 2021-08-03
WUHAN UNIV
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Problems solved by technology

[0005] In view of the above problems, the present invention is based on the 5G base station time synchronization error elimination method of the known coordinate reference station, which can reduce the positioning cost and solve the synchronization requirements between the base stations of the existing TDOA positioning technology, and realize 5G-oriented high-precision positioning

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  • 5G base station time synchronization error elimination method based on known coordinate reference station
  • 5G base station time synchronization error elimination method based on known coordinate reference station
  • 5G base station time synchronization error elimination method based on known coordinate reference station

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Embodiment Construction

[0026] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] There is no need to use atomic clocks or optical fibers to meet the time synchronization requirements of 5G base stations. One or more reference stations with known coordinates are added to the system to receive 5G system positioning reference signals, and the obtained TDOA value and other information are transmitted in real time to The system platform participates in the positioning calculation to obtain the relative time synchronization error between each base station. The system service platform broadcasts the calculated relative time error parameters between base stations as differential information to the user terminal to be positioned through the 5G communication link. The time error parameter is used to solve the user's precise position coordinates and realize positioning.

[0028] Under the existing 5G operato...

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Abstract

The invention provides a 5G base station time synchronization error elimination method based on a known coordinate reference station, and the method comprises the steps: adding one or more reference observation stations with known coordinates to receive a 5G system positioning reference signal, and transmitting the obtained TDOA value information to a system service platform in real time through a 5G communication link to participate in positioning calculation; the relative time synchronization error between the base stations is obtained; and the system service platform broadcasts the calculated relative time error parameters between the base stations as differential information to a user terminal to be positioned through a 5G communication link, the user terminal receives TDOA values and base station coordinates from the base stations and the relative time error parameters between the base stations broadcasted by the system service platform, and calculates the accurate position coordinates of a user to realize positioning. According to the invention, only one low-cost reference station receiving terminal is additionally arranged to eliminate the time synchronization error of the base station, and high-precision 5G positioning can be satisfied without using high-cost time synchronization such as an optical fiber.

Description

technical field [0001] The invention belongs to the technical field of 5G communication wireless positioning, and in particular relates to a method for eliminating time synchronization errors of 5G base stations based on known coordinate reference stations. Background technique [0002] At present, the positioning method based on the global satellite navigation system has been widely used. However, in the complex urban environment, there are many occlusions, and the satellite positioning signal often cannot meet the positioning requirements, and it is even difficult to receive the satellite signal. For the improvement of positioning accuracy requirements in indoor scenes, the current positioning technologies that mainly focus on indoor positioning, such as Wifi, UWB, and Bluetooth positioning, have defects such as high deployment costs or small coverage. The terminal positioning accuracy of 4G LTE mobile communication system exceeds 100 meters, which is difficult to meet the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W64/00
CPCH04W4/02H04W64/006
Inventor 宋伟伟林巍楼益栋郭文飞朱轶群
Owner WUHAN UNIV
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