Efficient communication with passive devices

Details Efficient communication with passive devices Efficient communication with passive devices

2005-03-01

2005-03-01

Trost, William (Department: 2683)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456600, C455S456100, C455S414200, C455S557000

Reexamination Certificate

active

06862454

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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