TARGET WAKE TIME FLOW IDENTIFICATION IN TWT ACKNOWLEDGEMENT

• US 20150189592A1
• Filed: 09/15/2014
• Published: 07/02/2015
• Est. Priority Date: 12/27/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: JAFARIAN, Amin, ASTERJADHI, Alfred, TIAN, Bin
• Granted Patent: US 9,363,752 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Certain aspects of the present disclosure provide methods and apparatus for generating a frame with timing information for a target wake time (TWT) and an identification of the TWT. An example method generally includes generating a frame generating a frame comprising timing information for a target wake time (TWT) and an identification of the TWT to which the timing information applies, and outputting the frame for transmission.

Claims

1. An apparatus for wireless communications, comprising:

a processing system configured to;

generate a frame comprising timing information for a target wake time (TWT) and an identification of the TWT to which the timing information applies; and

an interface configured to output the frame for transmission.

2. The apparatus of claim 1, wherein the frame is output for transmission outside a previously indicated service period for the TWT identified by the identification.

3. The apparatus of claim 1, wherein the identification is provided via one or more bits of at least one of an address field, a timestamp field, or a field that carries timing information for a TWT in the frame.

4. The apparatus of claim 1, wherein the frame comprises a control response frame.

5. The apparatus of claim 4, wherein the control response frame comprises a TWT Acknowledgment (TACK) frame, a Short TWT Acknowledgment (STACK) frame, or a Block Acknowledgment TWT (BAT) frame.

6. The apparatus of claim 4, wherein the identification is provided via a field of the control response frame, wherein the field is dependent, at least in part, on a type of the control response frame.

7. The apparatus of claim 4, wherein the identification is provided in a TWT Flow Identifier subfield included in an A1 field in the control response frame.

8. The apparatus of claim 3, wherein the size of the field that carries the identification is at least 3 bits.

9. A method for wireless communications, comprising:

generating a frame comprising timing information for a target wake time (TWT) and an identification of the TWT to which the timing information applies; and

outputting the frame for transmission.

10. The method of claim 9, wherein the frame is output for transmission outside a previously indicated service period for the TWT identified by the identification.

11. The method of claim 9, wherein the identification is provided via one or more bits of at least one of an address field, a timestamp field, or a field that carries timing information for a TWT in the frame.

12. The method of claim 9, wherein the frame comprises a control response frame.

13. The apparatus of claim 12, wherein the control response frame comprises a TWT Acknowledgment (TACK) frame, a Short TWT Acknowledgment (STACK) frame, or a Block Acknowledgment TWT (BAT) frame.

14. The method of claim 12, wherein the identification is provided via a field of the control response frame, wherein the field is dependent, at least in part, on a type of the control response frame.

15. The method of claim 12 wherein the identification is provided in a TWT Flow Identifier subfield included in an A1 field in the control response frame.

16. An apparatus for wireless communications, comprising:

an interface configured to receive a frame; and

a processing system configured to;

obtain, from the frame, timing information for a target wake time (TWT) and an identification of the TWT to which the timing information applies, and

update a wakeup period for the identified TWT based on the timing information obtained from the frame.

17. The apparatus of claim 16, wherein the frame is received outside a previously indicated service period for the TWT identified by the identification.

18. The apparatus of claim 16, wherein the processing system is configured to obtain the identification via one or more bits of at least one of an address field, a timestamp field, or a field that carries timing information for a TWT in the frame.

19. The apparatus of claim 16, wherein the frame comprises a control response frame.

20. The apparatus of claim 19, wherein the control response frame comprises a TWT Acknowledgment (TACK) frame, a Short TWT Acknowledgment (STACK), or a Block Acknowledgment TWT (BAT) frame.

21. The apparatus of claim 19, wherein the processing system is configured to obtain the identification via a field of the control response frame, wherein the field is dependent, at least in part, on a type of the control response frame.

22. The apparatus of claim 19, wherein the processing system is configured to obtain the identification in a TWT Flow Identifier subfield included in an A1 field in the control response frame.

23. The apparatus of claim 18, wherein the size of the field that carries the identification is at least 3 bits.

24. A method for wireless communications, comprising:

receiving a frame

obtaining, from the frame, timing information for a target wake time (TWT) and an identification of the TWT to which the timing information applies; and

updating a wakeup period for the identified TWT based on the timing information obtained from the frame.

25. The method of claim 24, wherein the frame is received outside a previously indicated service period for the TWT identified by the identification.

26. The method of claim 24, wherein the identification is obtained via one or more bits of at least one of an address field, a timestamp field, or a field that carries timing information for a TWT in the frame.

27. The method of claim 24, wherein the frame comprises a control response frame.

28. The method of claim 27, wherein the control response frame comprises a TWT Acknowledgment (TACK) frame, a Short TWT Acknowledgment (STACK), or a Block Acknowledgment TWT (BAT) frame.

29. The method of claim 27, wherein the identification is obtained via a field of the control response frame, wherein the field is dependent, at least in part, on a type of the control response frame.

30. The method of claim 27, wherein the identification is obtained in a TWT Flow Identifier subfield included in an A1 field in the control response frame.