Power Management Of A Radio Data Transceiver
First Claim
1. A method for operating a wireless mobile station which is configured to communicate with a wireless access point, the method comprising:
- determining, at the wireless mobile station, an interval of the time between successive target beacon transmission times (TBTT);
determining, at the wireless mobile station, a setting representing an interval of time between successive Delivery Traffic Indication Messages (DTIM);
adjusting a period of a sleep timer in response to determining the interval of time between successive TBTTs and in response to determining the interval of time between successive DTIMs.
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Accused Products
Abstract
Methods and apparatuses for operating a wireless mobile station configured to communicate with a wireless access point are described. A sleep state may be maintained in which a radio frequency (RF) radio in the wireless mobile station is in a low power state. The wireless station may use a plurality of sleep states, each with a different sleep timer period based upon recent network activity. In one embodiment, a device may have two sleep states with two sleep timers, and in another embodiment a device may have three sleep timers for three sleep states. The first sleep time may be started for a first sleep state and to determine when to awake the device to determine whether there is any network activity. The device then determines whether a first period of network inactivity has occurred and, if so, it starts a second sleep timer for a second sleep state in response to determining that the first period of network inactivity has occurred. The method can further include determining whether a second period of network inactivity has occurred and, in response to determining that a second period of network inactivity has occurred, the device starts a third sleep timer for a third sleep state
38 Citations
21 Claims
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1. A method for operating a wireless mobile station which is configured to communicate with a wireless access point, the method comprising:
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determining, at the wireless mobile station, an interval of the time between successive target beacon transmission times (TBTT); determining, at the wireless mobile station, a setting representing an interval of time between successive Delivery Traffic Indication Messages (DTIM); adjusting a period of a sleep timer in response to determining the interval of time between successive TBTTs and in response to determining the interval of time between successive DTIMs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating a wireless mobile station which is configured to communicate with a wireless access point, the method comprising:
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starting a first sleep timer for a first sleep state, the first sleep timer configured to count for a first sleep period of time, wherein a radio frequency (RF) radio of the wireless mobile station is in a low power state when the first sleep timer is counting for the first sleep period of time; changing the RF radio from the low power state to a high power state in response to the first sleep timer expiring, wherein the RF radio, in the high power state, is configured to listen for a beacon from the wireless access point at a target beacon transmission time (TBTT); determining a first period of network inactivity has occurred; starting a second sleep timer for a second sleep state in response to determining that the first period of network inactivity has occurred, the second sleep timer being configured to count for a second sleep period of time. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A mobile station for use with a wireless access point, the mobile station comprising:
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a radio frequency (RF) radio; an antenna coupled to the RF radio; a processor coupled to the RF radio, the processor configured to control power states of the RF radio, the power states includes at least a first sleep state associated with a first sleep timer and a listening timer, and wherein the processor is configured to start the first sleep timer to enter the first sleep state, wherein the power state of the RF radio is in a low power state when the first sleep timer is counting, in response to the first sleep timer expiring, start the listening timer to determine if a condition is satisfied for the RF radio to exit from the first sleep state, wherein the RF radio is in a high power state when the listening timer is counting, and restart the first sleep timer to remain in the first sleep state if the condition to exit the first sleep state the condition is not satisfied. - View Dependent Claims (18, 19, 20, 21)
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Specification