Telecommunications – Transmitter and receiver at separate stations – With control signal
Reexamination Certificate
2011-08-16
2011-08-16
Nguyen, Hai L (Department: 2816)
Telecommunications
Transmitter and receiver at separate stations
With control signal
C455S522000
Reexamination Certificate
active
08000658
ABSTRACT:
A communication control unit transmits a detection message and receives a reply message with respect to an external device via a communicating unit. A first calculating unit calculates distance to the external device based on time required to receive the reply message. A determining unit determines whether the distance is smaller than a predetermined threshold. When the distance is smaller than the threshold, an establishing unit establishes an encryption invalidated communication with the external device, and a second calculating unit calculates minimum transmission power of a wireless signal to communicate with the external device at the distance.
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European Search Report dated Nov. 26, 2010 issued in corresponding European Application No. 09250007.3.
Harness & Dickey & Pierce P.L.C.
Nguyen Hai L
Ricoh Company Limited
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