Time division duplex system utilizing global positioning...

Details Time division duplex system utilizing global positioning... Time division duplex system utilizing global positioning...

2006-11-07

2006-11-07

Ngo, Ricky Q. (Department: 2663)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S280000, C370S503000, C370S516000, C370S324000

Reexamination Certificate

active

07133397

ABSTRACT:
A method and apparatus for Time Division Duplex (TDD) synchronization of Access Points (APEs) uses the 1 pulse-per-second timing pulses of the Global Positioning System (GPS) and synchronization state machines for its Time Division Multiple Access (TDMA) structure. As a result, the present invention obviates the need for expensive voltage-controlled oscillators used by the prior art, and achieves stable timing accuracy within approximately 7.5 minutes, as opposed to the 12 to 24-hour period needed by prior art methods.

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patent: 2002/0114304 (2002-08-01), Crosbie et al.
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