Title:
ロケーションネットワークを時系列的に同期化するための方法及び装置
Document Type and Number:
Japanese Patent JP4293907
Kind Code:
B2
Abstract:
The present invention discloses a positioning system and method for locating a roving position receiver (708) within a location network. The positioning system comprises at least one specialised transceiver, termed a positioning-unit device (703, 704, 706), that receives one or more reference positioning signals (705) from at least one reference transmitter (701). Each positioning-unit device (703, 704, 706) generates, in response to the received reference positioning signals (705), a unique positioning signal (709) chronologically synchronised to the reference positioning signals (705). Once a positioning-unit device (703) is chronologically synchronised to a reference transmitter (701), other positioning-unit devices (706) can use its unique positioning signal (707) as a reference positioning signal. The geographical distribution of these chronologically synchronised positioning-unit devices (703, 704, 706) creates a time-coherent network of positioning signals (709) that propagate a reference timebase over a substantial area. The positioning system also includes a roving position receiver (708) which receives the chronologically synchronised positioning signals (709) and calculates its own position without the requirement of differential corrections.
Inventors:
Small david
Application Number:
JP2003540684A
Publication Date:
July 08, 2009
Filing Date:
November 01, 2002
Export Citation:
Assignee:
Locator Corporation Proprietary Limited
International Classes:
G01S19/11; G01S1/00; G01S1/24; G01S5/00; G01S5/02; G01S11/08; G01S19/05; G01S19/10; G01S19/23; G01S19/25; H04Q7/34; H04W64/00; G01S19/43
Domestic Patent References:
| JP2001027667A | ||||
| JP7159508A |
Foreign References:
| WO2001057549A2 | ||||
| WO1999047943A1 |
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Toshio Imajo
Takaki Nishijima
Fumiaki Otsuka
Toshio Imajo
Takaki Nishijima