Mobile station positioning system and method in mobile communication system
A positioning method and mobile station technology, applied in the directions of positioning, wireless communication, communication between multiple stations, etc., can solve the problems of PUF interference, reducing system efficiency and performance, etc.
Inactive Publication Date: 2004-03-31
SAMSUNG ELECTRONICS CO LTD
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- Application Information
AI Technical Summary
Problems solved by technology
However, PUF is defined in the IS-95B standard, therefore, PUF causes an increase in interference
Thus, reducing system efficiency and performance
Method used
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[0021] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would easily obscure the invention in unnecessary detail.
[0022] The invention described herein proposes a mobile station location system and method that not only prevents the degradation of system performance caused by increased interference in prior art mobile station location systems using PUFs, but also provides continuous location Serve. The principle of the present invention is a mobile station positioning method using the distance between a mobile station (MS) and each of a plurality of base stations (BS) in a CDMA mobile communication system, the distance being calculated using a forward link channel .
[0023] The mobile station positioning method of the present invention can be divided into two categories: the first category is to calcul...
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A mobile station positioning method is provided wherein a mobile station receives signals synchronized and transferred from at least three neighboring base stations at a predetermined time, wherein the mobile station belongs to one serving base station out of the at least three neighboring base stations. The mobile station positioning method including the steps of performing a forward transmission power control at at least one of the three neighboring base stations; calculating, at the mobile station, arrival time differences between two of the signals received from the at least three neighboring base stations; transmitting, at the mobile station, the arrival time differences to the serving base station; and estimating, at the serving base station, a position of the mobile station using the arrival time differences. A mobile station positioning system is also provided including at least three neighboring base stations for transmitting signals synchronized at a predetermined time and controlling forward transmission power of the signals during a scheduled time interval; a mobile station calculating arrival time differences between two of the signals received from the at least three neighboring base stations; and a serving base station included in the at least three neighboring base stations for receiving the arrival time differences from the mobile station and determining a position of the mobile station using the arrival time differences.
Description
technical field [0001] The present invention relates generally to mobile communication systems, and more particularly to mobile station positioning apparatus and methods in mobile communication systems. Background technique [0002] FCC (Federal Communication Committee, Federal Communications Commission) requires that for the emergency 911 (E911), by 2001, the service of locating all mobile stations (MS) within the allowable error limit of 125 meters with a probability of 67% should be realized. Designers use the IS-95CDMA (Code Division Multiple Access) standard provided by TIA / EIA and the PUF (Power Up Function, The reverse link function of the power up function) seeks to realize the service. [0003] PUF is a function used to measure the distance between a mobile station and each of a plurality of neighboring base stations. PUF uses the phenomenon that, in an emergency, a mobile station increases transmission power to a plurality of adjacent base stations. Each of the ...
Claims
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Login to View More IPC IPC(8): H04B7/26G01S5/00H04B7/005H04W52/40H04W64/00
CPCH04W52/40G01S2205/008G01S5/0027H04W64/00H04W52/143H04W52/325
Inventor 孔胜铉文熹灿
Owner SAMSUNG ELECTRONICS CO LTD