Conserving power on a mobile device

1. Computer-readable media having computer-useable instructions embodied thereon that, when executed, enable a mobile device that includes a radio to perform a method of conserving power, the method comprising:

while the mobile device is in a power-conservation mode, receiving from an application running on the mobile device an initial request to communicate data from the mobile device using the radio;

determining a period of time to wait to grant the initial request so that the mobile device is not immediately transitioned out of the power-conservation mode,

(1) wherein transitioning out of the power-conservation mode is necessary to communicate the data;

(2) wherein waiting the period of time will conserve the power by extending a duration that the mobile device is in the power-conservation mode; and

(3) wherein the period of time is calculated using an algorithm that takes radio-usage history on the device as an input and assumes that an inter-arrival time between requests is a variable with random distribution;

preventing a granting of the initial request until the period of time elapses; and

granting the initial request at an expiration of the period of time.

2. The media of claim 1 , wherein determining the period of time includes performing a delay-determination process comprising:

providing an opportunity to set a value of a confidence level, which will indicate a probability that a subsequent radio-usage request will be received prior to the granting of the initial request;

setting the confidence level to a value such that the probability is greater than a given percentage;

deriving a result by evaluating a natural logarithm function that includes the confidence level as an input, thereby producing a logarithmic result;

determining a rate parameter, which will indicate an expected number of radio-usage requests per second, and wherein the rate parameter is a function of a duration of time between prior requests to use the radio; and

dividing the logarithmic result by the rate parameter to calculate the period of time.

3. The media of claim 2 , further comprising setting the confidence level at about 95 percent.

4. The media of claim 2 , further comprising continually updating the rate parameter based on the duration of time between prior requests to use the radio.

5. The media of claim 4 , wherein continually updating the rate parameter includes reviewing the duration of time between a set of radio-usage requests that were received during a prior window of time, which is defined by one or more of a prior set of minutes, hours, or days.

6. The media of claim 2 , wherein deriving the logarithmic result includes evaluating the natural logarithm function of one minus the confidence level.

7. The media of claim 1 , wherein determining the period of time includes using numerical methods to iteratively solve a Poisson process.

8. The media of claim 1 , wherein determining the period of time includes setting the period of time at about 10 minutes.

9. The media of claim 1 , further comprising granting the request if the period of time exceeds a maximum period of time, and the maximum period of time has expired even if the period of time has not expired.

10. The media of claim 9 , wherein the maximum period of time is a determined by considering an amount of charge remaining in a battery of the mobile device.

11. The media of claim 10 , wherein the maximum period of time is determined by multiplying a predetermined period of time corresponding to a fully charged battery by a multiplier, wherein the multiplier is selected based on the amount of charge remaining in the battery.

12. The media of claim 1 , further comprising establishing a transmission control protocol connection to communicate the data.

13. The media of claim 1 , wherein the power-conservation mode includes one or more of:

a standby mode, and

a non-radio-using mode.

14. Computer-readable media having computer-useable instructions embodied thereon that, when executed, enable a device that includes a radio to perform a method of conserving power, the method comprising:

while the device is in a power-conservation mode, receiving from an application running on the device an initial request to communicate data from the mobile device using the radio;

determining a period of time to wait to grant the initial request so that the mobile device is not immediately switched out of the power-conservation mode, wherein determining the period of time includes,

(1) setting a confidence level value such that a probability that a subsequent radio-usage request will be received prior to the granting of the initial request is greater than a given percentage;

(2) deriving a logarithmic result by evaluating a natural logarithm function that includes the confidence level as an input;

(3) determining a rate parameter by observing a duration of time between prior requests to use the radio; and

(4) dividing the logarithmic result by the rate parameter to calculate the period of time;

denying the initial request for the period of time; and

granting the initial request at the earlier of the expiration of the period of time or the expiration of a maximum period of time.

15. The media of claim 14 , wherein the maximum period of time is a function of an amount of charge remaining in a battery of the device.

16. The media of claim 14 , wherein deriving said logarithmic result includes evaluating the natural logarithm function of one minus said confidence level.

17. Computer-readable media having computer-useable instructions embodied thereon that, when executed, enable a mobile device that includes a radio to perform a method of conserving power, the method comprising:

determining that the mobile device is in a power-conservation mode;

receiving from an application running on the mobile device an initial request to communicate data from the mobile device using the radio while the mobile device is in the power-conservation mode;

determining a duration of time that granting the initial request is to be delayed so as to not bring the mobile device immediately out of the power-conservation mode, wherein determining the duration of time includes,

(1) determining a first period of time by evaluating a Poisson distribution function that includes a confidence level and a rate parameter as an input;

(2) determining a second period of time by evaluating a battery charge function that includes a remaining charge in a battery of the mobile device as an input;

(3) comparing the first period of time to the second period of time; and

(4) selecting the period of time having a lower value as the duration of time;

delaying a grant of the initial request until the duration of time elapses; and

granting the initial request at an expiration of the duration of time.

18. The media of claim 17 , wherein determining the first period of time includes,

(1) providing an opportunity to set a value of a confidence level, which will indicate a probability that a subsequent radio-usage request will be received prior to the granting of the initial request;

(2) setting the confidence level to a value such that the probability is greater than a given percentage;

(3) deriving a result by evaluating a natural logarithm function that includes the confidence level as an input, thereby producing a logarithmic result;

(4) determining a rate parameter, which will indicate an expected number of radio-usage requests per second; wherein the rate parameter is a function of the duration of time between prior requests to use the radio; and

(5) dividing the logarithmic result by the rate parameter to calculate the first period of time.

19. The media of claim 17 , wherein deriving the logarithmic result includes evaluating the natural logarithm function of one minus the confidence level.

20. The media of claim 17 , further comprising setting a third period of time to a predetermined value;

comparing the first, second, and third period of time; and

selecting the period of time having a lowest value as the duration of time.

21. The media of claim 17 , further comprising immediately granting the initial request upon receiving a user request to update the application even if the duration of time has not elapsed, wherein the user request is received via an input device coupled to the mobile device.