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US 2007/0178875 A1Published application
Systems, methods, and apparatus for activity control in a wireless communications device
AssigneeQUALCOMM Incorporated
InventorsAnil Rao, Subramanya Rao
Life of this patent
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Abstract
Embodiments include methods of activity control in which a time of initiation of an active period of a discontinuous reception (DRX) cycle is based on a value calculated with respect to a wireless signal received during an active period of a previous DRX cycle.
Claims39
A method of activity control, said method comprising:
- during an active period of a first discontinuous reception (DRX) cycle, receiving a wireless signal;
- based on the received wireless signal, calculating a value;
- and
- based on the calculated value, calculating a starting time for the active period of a second DRX cycle subsequent to the first DRX cycle,
- wherein the calculated value indicates at least one among (A) a quality of the received wireless signal and (B) an error of at least one among time and frequency with respect to the received wireless signal.
2 more elements
An apparatus for wireless communications, said apparatus comprising:
- an oscillator configured to produce a frequency reference;
- a radio-frequency (RF) receiver arranged to receive the frequency reference, wherein the RF receiver is configured to receive a wireless signal according to the frequency reference;
- a sleep timer configured and arranged to activate said oscillator during the active periods of each of a plurality of discontinuous reception (DRX) cycles;
- and
- a calculator configured to calculate, according to a value based on at least one among (A) a quality of a wireless signal received by said RF receiver during the active period of a first one of the plurality of DRX cycles and (B) an error of at least one among time and frequency with respect to a wireless signal received by said RF receiver during the active period of the first one of the plurality of DRX cycles, a starting time for the active period of a second one of the plurality of DRX cycles subsequent to the first one.
2 more elements
An apparatus for wireless communications, said apparatus comprising:
- means for receiving a wireless signal during an active period of a first discontinuous reception (DRX) cycle;
- means for calculating a value based on the received wireless signal;
- and
- means for calculating, based on the calculated value, a starting time for the active period of a second DRX cycle subsequent to the first DRX cycle,
- wherein the calculated value indicates at least one among (A) a quality of the received wireless signal and (B) an error of at least one among time and frequency with respect to the received wireless signal.
2 more elements
Dependencies are inferred from the claim text.