Facilitating mobile station location using a ground-based...

Details Facilitating mobile station location using a ground-based... Facilitating mobile station location using a ground-based...

2007-06-12

2010-02-23

Phan, Dao L (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

C342S457000

Reexamination Certificate

active

07667648

ABSTRACT:
Communications facilitate locating a mobile station (22) using the radio frequency spectrum typically used for cellular communications. A first locating signal is communicated between a base station transceiver (30, 32) and a mobile station (22) and includes information regarding the location of the signal source. A plurality of second locating signals are communicated between a corresponding plurality of ranging beacon devices (40, 42, 44) and a mobile station (22) and each includes information regarding the location of the ranging beacon devices (40, 42, 44). The first and second signals allow for determining the location of the mobile station (22). In a disclosed example, the first and second signals are simultaneously transmitted by the base station (30, 32) and the plurality of ranging beacon devices (40, 42, 44), respectively.

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International Search Report and Written Opinion of the International Searching Authority for International application No. PCT/US2008/007201 mailed Oct. 23, 2008.
International Preliminary Report on Patentability for International application No. PCT/US2008/007201 mailed Sep. 10, 2009.

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