公开(公告)号：JP2001177469A

公开(公告)日：2001-06-29

申请号：JP2000311492

申请日：2000-10-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BOGDAN BRIAN J ,  GOLDEN MICHAEL J ,  MATUSEVICH ALEX ,  TOBIAS JONATHAN M ,  TSAMUTALIS CHRIS C

IPC: G01S13/75 ,  G01S13/76 ,  G01S13/79 ,  G01S19/13 ,  G01S19/48 ,  H04B7/26 ,  H04W64/00 ,  G01S5/14 ,  H04Q7/34

Abstract: PROBLEM TO BE SOLVED: To calculate a position of a mobile station (cellular phone) without the need for synchronization of base stations. SOLUTION: The method of this invention adopts the trigonometrical survey that calculates distances between a plurality of the base stations and a mobile station by measuring a round time delay (that is, a round time delay value) of a known symbol of a transmitted signal.

公开(公告)号：DE60021241D1

公开(公告)日：2005-08-18

申请号：DE60021241

申请日：2000-10-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BOGDAN BRIAN J ,  GOLDEN MICHAEL J ,  MATUSEVICH ALEX ,  TOBIAS JONATHAN M ,  TSAMUTALIS CHRIS C

IPC: G01S13/75 ,  G01S13/76 ,  G01S13/79 ,  G01S19/13 ,  G01S19/48 ,  H04B7/26 ,  H04W64/00 ,  H04Q7/38 ,  G01S5/00

Abstract: A method for locating a mobile unit without synchronizing base-stations is provided. A triangulation scheme where distances between a plurality of base-stations and a mobile unit (herein termed mobile) are calculated by measuring at least three round-trip-delay-values wherein each round-trip-delay-value corresponds to transmission of a downlink signal from each base-station to the mobile unit and transmission of an uplink signal, in response to the downlink signal, from the mobile unit to each base-station is described. It is a low-cost solution without requiring the participating base-stations to be accurately synchronized in time and with the added advantages of utilizing a known downlink signal and a known uplink signal in determining the position of the mobile.

公开(公告)号：DE60021241T2

公开(公告)日：2006-04-27

申请号：DE60021241

申请日：2000-10-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BOGDAN BRIAN J ,  GOLDEN MICHAEL J ,  MATUSEVICH ALEX ,  TOBIAS JONATHAN M ,  TSAMUTALIS CHRIS C

IPC: G01S5/00 ,  G01S13/75 ,  G01S13/76 ,  G01S13/79 ,  G01S19/13 ,  G01S19/48 ,  H04B7/26 ,  H04W64/00

Abstract: A method for locating a mobile unit without synchronizing base-stations is provided. A triangulation scheme where distances between a plurality of base-stations and a mobile unit (herein termed mobile) are calculated by measuring at least three round-trip-delay-values wherein each round-trip-delay-value corresponds to transmission of a downlink signal from each base-station to the mobile unit and transmission of an uplink signal, in response to the downlink signal, from the mobile unit to each base-station is described. It is a low-cost solution without requiring the participating base-stations to be accurately synchronized in time and with the added advantages of utilizing a known downlink signal and a known uplink signal in determining the position of the mobile.