WIRELESS DEVICE BATTERY CONSERVATION METHOD AND SYSTEM
First Claim
1. A mobile communications device comprising:
- a mobile device battery power saving system havinga channel processor to provide a flag signal indicating each loss of a system channel; and
a deep sleep controller to receive the flag signals and to count a number of times the system channel is lost within a timeout period, the deep sleep controller having a channel lost counter that is incremented each time the system channel is lost,the deep sleep controller further setting a channel lost start time value to a first current Global Positioning System time when the channel lost counter has a value of one and providing a system lost exit flag for entering a deep sleep mode when the number of times the system channel is lost within the timeout period is a predetermined number.
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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
19 Claims
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1. A mobile communications device comprising:
a mobile device battery power saving system having a channel processor to provide a flag signal indicating each loss of a system channel; and a deep sleep controller to receive the flag signals and to count a number of times the system channel is lost within a timeout period, the deep sleep controller having a channel lost counter that is incremented each time the system channel is lost, the deep sleep controller further setting a channel lost start time value to a first current Global Positioning System time when the channel lost counter has a value of one and providing a system lost exit flag for entering a deep sleep mode when the number of times the system channel is lost within the timeout period is a predetermined number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of saving battery power in a mobile device having a monitored system channel, the method comprising:
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switching the mobile device to a deep sleep mode when, within a timeout period, a count, performed by the mobile device, of system channel losses is a predetermined number; incrementing a channel lost counter each time the system channel is lost; and setting a channel lost start time value to a first current Global Positioning System time when the channel lost counter has a value of one. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification