Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1996-06-06
1999-03-16
Mullen, Thomas
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
370311, H04B 138
Patent
active
058841962
ABSTRACT:
To reduce the power consumption of a remote unit in a dispatch system the remote unit enters a dormant state. A base station transmits a forward link broadcast signal and monitors a common access channel. A first remote unit continually receives and decodes the forward link broadcast signal and determines whether said forward link broadcast signal comprises active signals. If the remote unit determines that the forward link broadcast signal comprises no active signals for some a duration T.sub.1, the first remote unit enters a dormant mode. In the dormant mode the remote unit sporadically receives and decodes said forward link broadcast signal. If this remote unit or any other remote unit on the same net presses a push to talk button, it transmits a message on the common access channel. In response, every remote unit on the net which is in a dormant state exits the dormant state and continually monitors the forward link broadcast signal.
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Grob Matthew S.
Lekven Eric J.
Yao Yu-Dong
Miller Russell B.
Mullen Thomas
Qualcomm Incorporated
Thibault Thomas M.
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