Method and apparatus for a deep-sleep mode in a digital cellular communication system
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United States of America Patent
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-
Dec 31, 1996
Grant Date -
N/A
app pub date -
Apr 20, 1994
filing date -
Apr 20, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus is provided for extending the battery life of a cellular radiotelephone. A cellular radiotelephone is conditioned to operate in a pager-only mode wherein the radiotelephone may receive short messages from a base station while conserving battery life by cyclically adopting a deep-sleep state. The base station is notified by the radiotelephone before the radiotelephone enters the deep-sleep state that the radiotelephone is unable to receive messages. After a period of time, the radiotelephone wakes-up, re-establishes contact with the base station and notifies the base station that the radiotelephone is ready to receive messages. After receipt of any messages the radiotelephone repeats the process.
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