Power save management with customized range for user configuration and tuning value based upon recent usage

• US 7,505,795 B1
• Filed: 07/07/2004
• Issued: 03/17/2009
• Est. Priority Date: 07/07/2004
• Status: Active Grant

• Current Assignee: Advanced Micro Devices, Inc.
• Original Assignee: Advanced Micro Devices, Inc.
• Inventors: Lim, Vincent Cheekiat, Raghuvanshi, Preetham
• Primary Examiner(s): RAMPURIA, SHARAD K
• Application Number:
  US10/886,350
• Time in Patent Office: 1,714 Days
• Field of Search: 455572-574, 4553431-3436, 4551274-1275, 455/41.2, 370/311, 340/7.38, 713/320
• US Class Current: 455/574
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 52/0232 according to average transmission signal activity
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and system for efficiently managing power consumption in a mobile device controls power consumption with an adjustable sleep period or listening interval that may be user-specified and automatically tuned based on recent detected usage. With an adjustable sleep period, a receiver conserves power by leaving a sleep mode only at predefined and adjustable periods, which may be selected by the user to balance connectivity and power saving and which may be automatically incremented when the device activity is low.

Claims

1. A communication system, comprising:

a communication device configured to run in an active mode and a sleep mode during which a user-specified listening interval is used to power up the communication device from the sleep mode to detect any processing activity that requires the communication device to enter the active mode; and

a memory for storing a power management module for monitoring the communication device activity to directly control entry of the communication device into the sleep mode without requiring external intervention and to adjust the listening interval in response to a predetermined condition to thereby adjust power saving performance for the communication device, where the power management module provides an input/output interface that permits a user to control the user-specified listening interval.

2. The communication system of claim 1, where the listening interval is adjusted by incrementing the listening interval when the power management module detects that the communication device activity is below a first threshold level of activity.

3. The communication system of claim 1, where the listening interval is adjusted by incrementing the listening interval up to a maximum listening interval when the power management module detects that the communication device activity is below a first threshold level of activity.

4. The communication system of claim 1, wherein the communication device comprises a wireless transceiver for connection to an external network, where the listening interval is adjusted by incrementing the listening interval when the power management module detects that the wireless transceiver has been inactive for more than a threshold amount of time.

5. The communication system of claim 1, further comprising a wireless transceiver for connecting the communication system to an external network, where the power management module adjusts the listening interval in response to recent transceiver traffic activity.

6. The communication system of claim 1, where the user-specified listening interval that a user may select for the communication device is different from a default listening interval, in which case the power management module adjusts the listening interval to the user-specified listening interval.

7. The communication system of claim 1, where the communication device leaves a sleep mode and enters an active mode when the power management module detects communication device activity.

8. The communication system of claim 1, where the input/output interface comprises a slider in a display window which the user may use to control the listening interval.

9. The communication system of claim 1, where the power management module adjusts the listening interval in response to recent communication device usage.

10. The communication system of claim 1, where the communication device comprises a wireless 802.11 receiver device, and the power management module comprises a software means for adjusting the listening interval.

11. An article of manufacture having at least one recordable medium having stored thereon executable instructions and data which, when executed by at least one processing device, cause the at least one processing device to:

place a peripheral device in a sleep mode when a threshold level of idleness is detected at the peripheral device without requiring further software intervention;

periodically wake up the peripheral device using a wake up interval having a default value; and

adjust the wake up interval in response to a predetermined condition comprising entry of a user-specified wakeup interval, in which case the at least one processing device adjusts the wakeup interval to the user-specified wakeup interval.

12. The article of manufacture of claim 11, where the predetermined condition comprises a change in activity for the peripheral device.

13. The article of manufacture of claim 11, where the peripheral device comprises a receiver device, and the predetermined condition comprises a change in connectivity for the receiver device.

14. The article of manufacture of claim 11, where the peripheral device comprises a transceiver device and the predetermined condition comprises an increase in traffic over the transceiver device.

15. The article of manufacture of claim 14, where the transceiver device is compliant with IEEE 802.11.

16. The article of manufacture of claim 11, where the wakeup interval is adjusted by incrementing the wakeup interval when the peripheral device has been inactive for more than a threshold amount of time.

17. In a wireless communication device, a method for controlling power save operations, comprising:

setting a listening interval at a user-specified duration that is different from a default listening interval;

placing a communication device in a sleep mode until the listening interval expires, at which time the communication device is powered up to detect if there is any activity for the communication device;

monitoring an activity measure for the communication device; and

dynamically adjusting the listening interval when a change in the activity measure is detected.

18. The method of claim 17, where the listening interval is adjusted by lengthening the listening interval when the communication device has been inactive for more than a threshold amount of time.

19. The method of claim 17, where the listening interval is incremented when traffic activity on the communication device is below a first threshold value, and is returned to the default value when traffic activity on the communication device is above a second threshold value.