Method and apparatus for monitoring the maximum distance...

Details Method and apparatus for monitoring the maximum distance... Method and apparatus for monitoring the maximum distance...

2007-04-24

2011-11-22

Lieu, Julie (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S539110, C455S226100, C455S115400, C455S438000, C455S522000, C455S456300, C455S226200, C455S226400

Reexamination Certificate

active

08063789

ABSTRACT:
A method and an apparatus for monitoring the maximum distance between two objects, in particular between a child and its guardian, with the aid of two transceivers, the first of which periodically transmits status messages of a particular transmission power to the second, wherein an alarm is triggered in the second transceiver if the reception of the status messages decrease, and wherein a statement of the transmission power is concomitantly transmitted in each status message, are distinguished by the fact that the transmission power to be used for the next status message is determined by comparing the reception power with the transmission power stated in a status message and is transmitted back to the first transceiver in a confirmation message.

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Written Opinion of the International Searching Authority, International Application No. PCT/AT2007/000187, 8 pages.

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