Positioning apparatus, positioning method, and positioning...

Details Positioning apparatus, positioning method, and positioning... Positioning apparatus, positioning method, and positioning...

2006-05-09

2006-05-09

Trost, William (Department: 2683)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S065000, C455S456100, C370S386000, C370S450000, C370S453000, C375S342000

Reexamination Certificate

active

07043257

ABSTRACT:
A positioning apparatus for determining a present position of a mobile station by using radio waves coming from a plurality of base stations arranged within a communication area is provided. The positioning apparatus receives the radio waves coming from the plurality of base stations to generate reception signals corresponding to the respective radio waves, and determines propagation ranges of the radio waves coming from the respective base stations. The apparatus further derives propagation ranges of direct waves coming from the respective base stations from the determined propagation ranges. Then, the present position of the mobile station is determined by performing positioning operation using the derived propagation ranges of the direct waves.

REFERENCES:
patent: 5945948 (1999-08-01), Buford et al.
patent: 5982324 (1999-11-01), Watters et al.
patent: 6310576 (2001-10-01), Johnson
patent: 6342854 (2002-01-01), Duffett-Smith et al.
patent: 6356608 (2002-03-01), Atarius
patent: 6414634 (2002-07-01), Tekinay
patent: 2002/0142726 (2002-10-01), Hunzinger
patent: 99/11086 WO (1999-03-01), None
patent: WO 99/11086 (1999-03-01), None

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