US Patent No: 6,006,068
Number of patents in Portfolio can not be more than 2000
Two-way pager with transmit threshold
Stats
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Dec 21, 1999
Issued date -
Jan 12, 1998
filing date -
09/005,674
serial no -
In Force
status
Importance
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Abstract
Application of power to a transmitter in a messaging device is preceded by measuring a quality of at least one base station down-link signal received by a receiver in the device, and producing a transmit threshold signal when the measured signal quality corresponds to a substantial likelihood of accurate detection by a base station of an up-link signal to be transmitted from the device. The device transmitter is powered on only if the transmit threshold signal is present over a given interval prior to a transmitter operation. Thus, a relatively low-power battery and small antenna can be used effectively by the device, and its overall size kept at a minimum.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,049,875 Method and apparatus for out of range detection in response to nondetection of predetermined baud rates | 27 | 1989 | |
| 5,032,835 Out of range indication for radio receivers | 22 | 1990 | |
| 5,289,178 Sensitivity indicator for a radio receiver and method therefor | 19 | 1992 | |
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| 4,851,820 Paging device having a switch actuated signal strength detector | 42 | 1987 | |