公开(公告)号：JP2000244968A

公开(公告)日：2000-09-08

申请号：JP2000035784

申请日：2000-02-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BAIRON FA CHEN ,  CHING CHIANG TUNG ,  FREIDENFELDS JOHN ,  TEKIN IBRAHIM

IPC: G01S5/02 ,  G01S5/12 ,  H04B7/26 ,  H04W64/00 ,  H04Q7/34

Abstract: PROBLEM TO BE SOLVED: To obtain a method for calculating the position of a mobile station by combining plural predicted positions. SOLUTION: Predicted positions of a mobile station are averaged by using weighted sum. The weighted coefficients reflect information to generate a predicted position or quality of data. This position is predicted on the basis of information such as time difference of arrival(TDOA), a time of arrival(TOA), and an angle of arrival(AOA). A round trip delay(RTD) givens the TOA information and a strength measurement message(PSMM) of a pilot signal includes the TDOA information and an ID of a case station to send the AOA information and a signal to the mobile station.

公开(公告)号：JP2000180186A

公开(公告)日：2000-06-30

申请号：JP35683599

申请日：1999-12-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BAIRON FA CHEN ,  MARIA E PARAMARA ,  VARVARO CHARLES

IPC: G01C21/00 ,  G01S5/00 ,  G01S5/10 ,  G01S19/48 ,  H04W64/00 ,  G01S5/14 ,  H04Q7/34

Abstract: PROBLEM TO BE SOLVED: To enable positioning similar to GPS by using usual apparatuses by using radio wave propagation parameters in a CDMA(code division multiple access) system normal link or a TDMA(time division multiple access) system inverse link, for position confirmation of a mobile station. SOLUTION: In order to determine the position of a mobile station, data samples from the mobile station (e.g. sector number, pilot phase, and intensity of pilot channel signal) are read in a step S10. In a step S20, a cell site table is read which contains measured information of geographical positions of a base station such as the ID sector number and latitude/longitude of the base station. In a step S30, a section number of the data samples is made to conform with a section number in the cell site table, in order to determine a place where a pilot signal is transmitted. In a step 40, a distance from a visual base station is confirmed. In a step 50, geographical coordinates of the mobile station are determined by using TDOA(time difference of arrival).