Efficient communication with passive devices

Details Efficient communication with passive devices Efficient communication with passive devices

2007-06-19

2007-06-19

Le, Danh (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S556200, C455S041200, C368S010000, C368S013000, C700S083000

Reexamination Certificate

active

10998466

ABSTRACT:
A system and method that provides data messages to a passive device. A passive device, for example watch, is registered together with the telephone number of a cellular telephone of a subscriber to the data message service. Since the cellular telephone periodically transmits a beacon signal, the wireless network knows its cell location. Accordingly, the system determines the cell location of the cellular telephone and establishes a communication of the subscribed data to the watch via the local cellular provider for the same cell location as that of the subscriber's cellular telephone.

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