Power saving modes in wireless devices

• US 9,167,530 B2
• Filed: 05/21/2013
• Issued: 10/20/2015
• Est. Priority Date: 11/30/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Shrivastava, Sarvesh, Homchaudhuri, Sandip, Du, Shu, Jia, Zhanfeng, Bhora, Veerendra
• Primary Examiner(s): BLANTON, JOHN D
• Application Number:
  US13/899,428
• Publication Number:
  US 20140153458A1
• Time in Patent Office: 882 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0258 controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Various aspects of apparatus for accessing a network through a wireless access point and methods of power savings for such apparatus include scheduling a sleep state interval, entering a sleep state at the beginning of the scheduled sleep interval, and buffering data during the sleep state for transmission following the sleep state.

Claims

1. An apparatus for accessing a network through a wireless access point, comprising:

a processing system configured to;

schedule a sleep state interval;

enter a sleep state at the beginning of the scheduled sleep interval;

buffer data during the sleep state for transmission following the sleep state;

identify data other than the data buffered for transmission; and

determine if the other data is to be transmitted before the end of the scheduled sleep interval.

2. The apparatus of claim 1 wherein the processing system is further configured to wake up from the sleep state at the end of the scheduled sleep state interval.

3. The apparatus of claim 1 wherein the processing system is further configured to wake up from the sleep state before the end of the scheduled sleep interval.

4. The apparatus of claim 3 wherein the other data comprises at least one from the group consisting of voice and video.

5. The apparatus of claim 3 wherein the other data comprises data for establishing a network connection.

6. The apparatus of claim 3 wherein the other data comprises data belonging to an application running in the processing system.

7. The apparatus of claim 1 wherein the processing system is further configured to wake up from the sleep state before the end of the scheduled sleep interval to transmit at least a portion of the buffered data.

8. The apparatus of claim 7 wherein the processing system is further configured to wake up from the sleep state when a quality metric for the transmission channel exceeds a threshold.

9. The apparatus of claim 7 wherein the processing system is further configured to wake up from the sleep state when the bandwidth of an available transmission channel exceeds a threshold.

10. The apparatus of claim 1 wherein the processing system comprises a host and wireless modem, wherein the wireless modem is configured to schedule the sleep interval and communicate the schedule to the host, and wherein the host comprises a data queue configured to buffer the data during the sleep state.

11. The apparatus of claim 10 wherein the processing system is further configured to wake up from the sleep state at the end of the sleep state interval, and wherein the host is further configured to provide at least a portion of the buffered data from the data queue to the wireless modem for transmission.

12. The apparatus of claim 10 wherein the host is further configured to wake up the processing system before the end of the scheduled sleep interval and provide at least one of other data to be transmitted before the end of the scheduled sleep interval and at least a portion of the buffered data from the data queue to the wireless modem for transmission.

13. The apparatus of claim 1 wherein the processing system further comprises a data queue for buffering the data, and wherein the processing system is further configured to wake up from the sleep state when the data queue is filled above a specified threshold.

14. An apparatus for accessing a network through a wireless access point, comprising:

means for scheduling a sleep state interval;

means for entering a sleep state at the beginning of the scheduled sleep interval; and

means for buffering data during the sleep state for transmission following the sleep state;

means for identifying data other than the data buffered for transmission; and

means for determining if the other data is to be transmitted before the end of the scheduled sleep interval.

15. The apparatus of claim 14 further comprising means for waking up from the sleep state at the end of the scheduled sleep state interval.

16. The apparatus of claim 14 further comprising means for waking up from the sleep state before the end of the scheduled sleep interval.

17. The apparatus of claim 14 wherein the other data comprises at least one from the group consisting of voice and video.

18. The apparatus of claim 14 wherein the other data comprises data for establishing a network connection.

19. The apparatus of claim 14 wherein the other data comprises data belonging to an application running in the processing system.

20. The apparatus of claim 14 further comprising means for waking up from the sleep state before the end of the scheduled sleep interval to transmit at least a portion of the buffered data.

21. The apparatus of claim 20 wherein the means for waking up from the sleep state is configured to wake up from the sleep state when a quality metric for the transmission channel exceeds a threshold.

22. The apparatus of claim 20 wherein the means for waking up from the sleep state is configured to wake up from the sleep state when the bandwidth of an available transmission channel exceeds a threshold.

23. The apparatus of claim 14 further comprising a data queue for buffering the data, and wherein the means for waking up from the sleep state is configured to wake up from the sleep state when the data queue is filled above a specific threshold.

24. A method of power savings for an apparatus configured to access a network through a wireless access point, comprising:

scheduling a sleep state interval;

entering a sleep state at the beginning of the scheduled sleep interval;

buffering data during the sleep state for transmission following the sleep state;

identifying data other than the data buffered for transmission; and

determining if the other data is to be transmitted before the end of the scheduled sleep interval.

25. The method of claim 24 further comprising waking up from the sleep state at the end of the scheduled sleep state interval.

26. The method of claim 24 further comprising waking up from the sleep state before the end of the scheduled sleep interval.

27. The method of claim 24 wherein the other data comprises at least one from the group consisting of voice and video.

28. The method of claim 24 wherein the other data comprises data for establishing a network connection.

29. The method of claim 24 wherein the other data comprises data belonging to an application running in the processing system.

30. The method of claim 24 further comprising waking up from the sleep state before the end of the scheduled sleep interval to transmit at least a portion of the buffered data.

31. The method of claim 30 wherein the waking up from the sleep state comprises waking up from the sleep state when a quality metric for the transmission channel exceeds a threshold.

32. The method of claim 30 wherein the waking up from the sleep state comprises waking up from the sleep state when the bandwidth of an available transmission channel exceeds a threshold.

33. The method of claim 24 wherein the data is buffered in a data queue, and wherein the waking up from the sleep state comprises waking up from the sleep state when the data queue is filled above a specific threshold.

34. A computer program product for an apparatus configured to access a network through a wireless access point, comprising:

a non-transitory computer-readable medium comprising code executable by one or more processors for;

scheduling a sleep state interval;

entering a sleep state at the beginning of the scheduled sleep interval;

buffering data during the sleep state for transmission following the sleep state;

identifying data other than the data buffered for transmission; and

determining if the other data is to be transmitted before the end of the scheduled sleep interval.

35. The computer program product of claim 34 further comprising code executable by one or more processors for waking up from the sleep state at the end of the scheduled sleep state interval.

36. The computer program product of claim 34 further comprising waking up from the sleep state before the end of the scheduled sleep interval.

37. The computer program product of claim 34 wherein the other data comprises at least one from the group consisting of voice and video.

38. The computer program product of claim 34 wherein the other data comprises data for establishing a network connection.

39. The computer program product of claim 34 wherein the other data comprises data belonging to an application running in the processing system.

40. The computer program product of claim 34 further comprising code executable by one or more processors for waking up from the sleep state before the end of the scheduled sleep interval to transmit at least a portion of the buffered data.

41. The computer program product of claim 40 wherein the code for waking up from the sleep state comprises code for waking up from the sleep state when a quality metric for the transmission channel exceeds a threshold.

42. The computer program product of claim 40 wherein the code for waking up from the sleep state comprises code for waking up from the sleep state when the bandwidth of an available transmission channel exceeds a threshold.

43. The computer program product of claim 34 wherein the data is buffered in a data queue, and wherein the code for waking up from the sleep state comprises code for waking up from the sleep state when the data queue is filled above a specific threshold.