Wireless communication system and method and system for detection of position of radio mobile station

• US 6,275,190 B1
• Filed: 08/04/2000
• Issued: 08/14/2001
• Est. Priority Date: 03/22/1996
• Status: Expired due to Term

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Sugiura, Masataka, Ishibashi, Hiroyoshi, Kanaya, Etsumi, Kubo, Toru, Yamaguchi, Kazuaki, Oka, Natsuki
• Primary Examiner(s): Issing, Gregory C.
• Application Number:
  US09/632,788
• Time in Patent Office: 375 Days
• Field of Search: 342/464, 455/456, 706/14, 706/23
• US Class Current: 342/464
• CPC Class Codes: G01S 1/026 of associated receivers
• CPC Class Codes: G01S 5/02521 using a radio-map
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A method of detecting a position of a radio mobile station in radiocommunications, which is capable of accurately and simply finding the position of the mobile station. At a measuring point the mobile station measures the reception radio strength levels from a plurality of base stations and conveys the measurement results through the base station to a control station. The control station learns, through a neural network, the correlation between the reception radio strength levels and the position of the mobile station on the basis of the measurement results at a plurality of measuring points and the positions of the measuring points. Subsequently, when the mobile station communicates to the control station the reception radio strength levels measured at an arbitrary point, the control station estimates the position of the mobile station, causing those measurement results, on the basis of the correlation obtained through the learning.

Claims

1. A method of detecting a position of a mobile station in a wireless radiocommunication system including said mobile station, a plurality of base stations and a control station, said method comprising:

a step in which said mobile station measures reception radio strength levels from said plurality of base stations at a measuring point to communicate the measurement results through one of said base stations to said control station;

a step in which said control station learns, through a neural network, a correlation between said reception radio strength levels and a position of said mobile station on the basis of said measurement results at a plurality of measuring points and positional data of said measuring points and conveys parameters of said neural network, obtained through the learning, to said mobile station; and

a step in which said mobile station constructs a neural network using said parameters to detect its own position on the basis of reception radio strength levels from said plurality of base stations measured at an arbitrary point through the use of the constructed neural network.