Telecommunications – Transmitter and receiver at separate stations
Patent
1997-12-22
2000-12-05
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455343, 455574, 370311, H04B 700, H04B 138, H04B 116
Patent
active
061578169
ABSTRACT:
A mobile communications device such as a pager or a cellular telephone enters a low power state more promptly than under TIA/EIA/IS-136 standards when an incoming message is pending for the device but is delayed by a first message broadcast for another such device. The device calculates the number of frames or SPACH slots required under those standards for the message for the other device; if that number is more than that reserved for the message for itself then it powers down immediately until the next paging channel slot is to be received. If the number of frames or SPACH slots required for the message for the other device is the same as or less than that reserved for the message for itself, then the device powers down immediately only for the duration of the message for the other device. By so powering down, the device achieves great savings in battery power as compared to present practices, without delay in reading incoming signals directed to the device.
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Telecommunications Industry Association, TDMA Cellular/PCS--Radio Interface--Mobile Station--Base Station Compatibility--Digital Control Channel, Oct. 1996.
Anderson Keith William
Burdette Brian
Appiah Charles N.
Eisenzopf Reinhard J.
Ericsson Inc.
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