Wireless device atttery conservation method and system
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Abstract
Generally, the present invention provides a method for detecting poor RF conditions, and entering different sleep mode levels or phases in accordance with the RF conditions to save battery power. Mobile device battery life can be conserved when the mobile device detects poor RF conditions and enters a deep sleep mode of operation. In this deep sleep mode of operation the mobile device periodically samples the RF conditions and gradually increases the period between samples when the RF conditions do not improve. Because mobility can change the RF condition for wireless devices even in areas of good RF coverage, the mobile device operating in the deep sleep mode can detect this mobility and thus enhance the probability of entering an idle state, or alternatively, entering a longer power save mode. When the RF condition improves, the mobile device exits from the deep sleep mode and returns to the idle state.
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Citations
59 Claims
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27. A method for switching a mobile device to a deep sleep mode comprising:
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a) monitoring a system channel;
b) counting a number of times the system channel is lost within a timeout period; and
,c) entering the deep sleep mode when the system channel count equals a predetermined number. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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35. A method for saving battery power in a mobile device switched to a deep sleep mode, the method comprising:
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a) monitoring a system channel;
b) counting a number of times the system channel is lost within a timeout period;
c) entering the deep sleep mode when the system channel count equals a predetermined number;
d) waking up from the deep sleep mode after a time interval to sample an RF strength of a system;
e) comparing the sampled RF condition strength to a predetermined level;
f) increasing the time interval if the sampled RF condition strength is less than the predetermined level; and
,g) re-entering the deep sleep mode. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A mobile device battery power saving system, comprising:
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a) a channel processor for providing a flag signal indicating loss of a system channel;
b) a deep sleep controller for receiving the flag signal, counting a number of times the system channel is lost within a timeout period, and providing a system lost exit flag for entering a deep sleep mode when the system channel count equals a predetermined number;
c) a variable setting controller for setting deep sleep mode variables in response to the system lost exit flag and for adjusting the deep sleep mode variables in response to control signals; and
,d) a low power controller for iteratively sampling an RF condition parameter at a time interval defined by the deep sleep mode variables and for providing the control signals to the variable setting controller when the RF condition fails to improve.
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Specification