Method and apparatus for managing time in a satellite...

Details Method and apparatus for managing time in a satellite... Method and apparatus for managing time in a satellite...

2007-11-16

2009-12-01

Phan, Dao L (Department: 3662)

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

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

07626539

ABSTRACT:
A method, apparatus and system for time management in a position-location system is described. The method may include (i) obtaining, at a global-navigation-satellite-system receiver while being served by a first node of a wireless network a first time base, a relative-time difference, and a third time base; and forming a time relation as a function of the first time base, relative-time difference (“RTD”) and third time base. The first time base is associated with the first node, and may be, for example, a time base associated with an air interface for communicating with the first node. The RTD may be a difference between the first time base and a second time base associated with a second node of the wireless network. The third time base is associated with a constellation of satellites, and may be, for example, an absolute time associated with the constellation of satellites. The method may include using knowledge of a GNSS time to enhance sensitivity or time to first position of a GNSS receiver.

REFERENCES:
patent: 5945948 (1999-08-01), Buford et al.
patent: 2004/0087277 (2004-05-01), Edge et al.
patent: 2004/0185873 (2004-09-01), Gilkes et al.

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