System unavailablity power reduction method with early failure and no rotation
First Claim
1. A mobile station method for conserving power, said method comprising steps of:
- attempting to access a base station, including defining a sequence of carrier spectrums to search, wherein the sequence of carrier spectrums includes at least one code division multiple access (CDMA) channel having a plurality of pseudo-random number (PN) code timing positions, and wherein the step of attempting to access a base station includes searching only once through all PN code timing positions of the CDMA channel;
operating in a reduced power consumption mode throughout a sleep time interval responsive to failing to access any base station after searching only once through the sequence of carrier spectrums; and
increasing mobile station power consumption after operating in the reduced power consumption mode throughout the sleep time interval.
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Accused Products
Abstract
The present invention includes a method and an apparatus for reducing power consumption in a wireless telephone. The wireless telephone is programmed to enter a reduced power mode for a sleep interval of time upon failing to access a base station. Additionally, the overall base station accessing process is considerably shortened by only searching once through the sequence of available carrier spectrums (e.g., digital and analog carriers for multi-mode mobile stations) before entering the reduced power mode. Also, when searching through a code division multiple access (CDMA) channel, the present invention includes searching only once through all pseudo-random number (PN) code timing locations when searching for a base station.
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Citations
18 Claims
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1. A mobile station method for conserving power, said method comprising steps of:
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attempting to access a base station, including defining a sequence of carrier spectrums to search, wherein the sequence of carrier spectrums includes at least one code division multiple access (CDMA) channel having a plurality of pseudo-random number (PN) code timing positions, and wherein the step of attempting to access a base station includes searching only once through all PN code timing positions of the CDMA channel; operating in a reduced power consumption mode throughout a sleep time interval responsive to failing to access any base station after searching only once through the sequence of carrier spectrums; and increasing mobile station power consumption after operating in the reduced power consumption mode throughout the sleep time interval. - View Dependent Claims (2, 3)
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4. A mobile station method for conserving power, said method comprising steps of:
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attempting to access a base station; and operating in a reduced power consumption mode throughout a sleep time interval responsive to failing to access any base station, wherein the attempting step includes steps of defining a sequence of carrier spectrums to search, and searching only once through the sequence of carrier spectrums before operating in the reduced power consumption mode, and wherein the operating step includes terminating the reduced power consumption mode responsive to detecting user key input. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mobile station power control apparatus comprising:
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a base station unavailability detection mechanism including a rotationless carrier spectrum sequence searcher configured to search only once through a sequence of carrier spectrums; and a sleep mode controller responsively connected to said base station unavailability detection mechanism to invoke a reduced power consumption mode responsive to base station unavailability. - View Dependent Claims (15, 16, 17, 18)
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Specification