Method and device for positioning terminal
A terminal positioning and final position technology, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as difficult positioning in densely built areas, inability to achieve accurate positioning, and ineffective GPS systems
Active Publication Date: 2014-08-06
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology
[0008] Signal angle of arrival (AOA) method: two base stations can achieve positioning, but the base station needs to have a receiving antenna array, the accuracy is greatly affected by the channel, and positioning is difficult in densely built areas
[0009] AGPS positioning method: In order to locate, it is required to receive at least four satellite signals. The GPS system generally does not work and cannot be realized between high-rise buildings in dense urban areas, in buildings, and in any area where only four or less satellites can be seen. precise positioning
Method used
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specific Embodiment approach
[0093] figure 2 The flow chart of the method for establishing the historical database provided by the embodiment of the present invention, such as figure 2 As shown, the specific steps are as follows:
[0094] Step 201: For any cell, the base station evenly divides the cell into a preset number: M (M>1) areas, using the center of each area as an initial clustering point, the number of base station initialization iterations l=0, record The location of each initial cluster point And, the base station sets a preset number of sample points in the cell.
[0095] For example: for any cell, such as image 3As shown in cell 0 in , first divide the cell into 6 regular triangles, and then divide each regular triangle into 4 regular triangles to obtain 24 regular triangles, and then divide each regular triangle into 4 regular triangles , so that the cell contains M=96 regular triangles in total, and the center of each regular triangle in the M regular triangles is used as an initi...
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The invention discloses a method and a device for positioning a terminal, wherein the method comprises the steps of: for any cell, setting a first preset number of clustering terminals in a cell, acquiring position data of each clustering terminal: angle of arrival AOA, time of arrival TOA, signal to noise ratio SNR and the physical coordinate, and inputting the position data of each clustering terminal into a historical data base; for any terminal to be positioned, measuring the AOA, the TOA and the SNR of the terminal, based on the AOA, the TOA and the SNR of the terminal to be positioned, searching the historical database for a clustering terminal which matches best to the terminal to be positioned, and determining an initial estimate position of the terminal to be positioned based on the physical coordinate of the clustering terminal; calculating the final position of the terminal to be positioned based on the initial estimate position of the terminal to be positioned and the distance between the terminal to be positioned and other terminals to be positioned. According to the invention, only one base station is needed for positioning a terminal.
Description
technical field [0001] The present invention relates to the field of positioning technology, in particular to a terminal positioning method and device. Background technique [0002] With the development of mobile communication, the mobile positioning service in the mobile communication system has attracted more and more attention. There are currently 3 commonly used positioning methods: [0003] 1. Positioning methods based on time measurement, such as: time of arrival (TOA, Time of Arrival) method, time difference of arrival (TDOA, Time Different Of Arrival) method. Mainly by detecting the propagation time of the radio wave from the transmitter to the receiver, the distance between the two is calculated, and then the estimated position of the mobile station is calculated by a certain method. [0004] 2. Signal Angle of Arrival (AOA, Angle of Arrival) method: The AOA of the radio waves transmitted by the mobile station is detected through the antenna array of the base stat...
Claims
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IPC IPC(8): H04W64/00H04B17/00H04B17/382
Inventor 姚岚骆晓亮
Owner CHINA MOBILE COMM GRP CO LTD