Triggered target wake time operation

Patent metadata

Field	Value
Publication number	US-9713087-B2
Application number	US-201615008409-A
Country	US
Kind code	B2
Filing date	Jan 27, 2016
Priority date	Jan 28, 2015
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A method, an apparatus, and a computer-readable medium for wireless communication are provided. In an aspect, an apparatus may be configured to determine whether to switch to an active mode, a power save mode, or a TWT power save mode. During the TWT power save mode, the apparatus may enter an awake state during TWT service periods and may enter a doze state outside of the TWT service periods. The apparatus may transmit a message to a second wireless device based on the determination.

First claim

What is claimed is:

1. A method of wireless communication by a first wireless device, comprising:
determining whether to switch to an active mode, a power save mode, or a target wake time (TWT) power save mode, wherein, during the TWT power save mode, the first wireless device enters an awake state during TWT service periods and enters a doze state outside of the TWT service periods, wherein the determining comprises:
determining if there is additional data for transmission or reception;
receiving from a second wireless device a quality of service (QoS) message with an end of service period (EOSP) indicator set to 1; or
receiving from the second wireless device a trigger message with a cascaded indicator set to 0 and the trigger message is not intended for the first wireless device; and

transmitting a message to a second wireless device indicating a mode to which the first wireless device will switch based on the determination.

2. The method of claim 1 , wherein the TWT service periods are identified based on a TWT schedule associated with the first wireless device.

3. The method of claim 1 , wherein the message includes a power management indicator that indicates the mode to which the first wireless device intends to switch.

4. The method of claim 1 , further comprising receiving an indication from the second wireless device instructing the first wireless device to switch to or to switch away from the TWT power save mode, wherein the determination is further based on the received indication.

5. The method of claim 4 , wherein the indication includes the EOSP indicator set to 1.

6. The method of claim 1 , further comprising determining a mode of the second wireless device.

7. The method of claim 6 , wherein the determining the mode of the second wireless device comprises receiving a second message from the second wireless device, wherein second message includes a responder mode indicator that indicates whether the second wireless device is in a doze state outside of the TWT service periods, and the determination of the mode of the second wireless device is based on the responder mode indicator.

8. The method of claim 6 , wherein the determining the mode of the second wireless device comprises receiving a trigger message from the second wireless device, wherein the determination of the mode of the second wireless device is based on whether the trigger message includes resource allocations to any wireless devices.

9. The method of claim 1 , further comprising receiving from the second wireless device a second message that includes a traffic indication map, wherein the traffic indication map indicates a mode of operation for the first wireless device to select, and wherein the determination is further based on the second message.

10. The method of claim 1 , wherein the first wireless device is configured to switch from the TWT power save mode to the power save mode when there is no additional data for transmission or reception.

11. The method of claim 1 , wherein the first wireless device is configured to switch from the TWT power save mode to the power save mode after receiving from the second wireless device the QoS message with the EOSP indicator set to 1.

12. An apparatus for wireless communication, the apparatus being a first wireless device, comprising:
means for determining whether to switch to an active mode, a power save mode, or a target wake time (TWT) power save mode, wherein, during the TWT power save mode, the first wireless device enters an awake state during TWT service periods and enters a doze state outside of the TWT service periods, the means for determining being configured to:
determine if there is additional data for transmission or reception;
receive from a second wireless device a quality of service (QoS) message with an end of service period (EOSP) indicator set to 1; or
receive from the second wireless device a trigger message with a cascaded indicator set to 0 and the trigger message is not intended for the first wireless device; and

means for transmitting a message to a second wireless device indicating a mode to which the first wireless device will switch based on the determination.

13. The apparatus of claim 12 , wherein the TWT service periods are identified based on a TWT schedule associated with the first wireless device.

14. The apparatus of claim 12 , wherein the message includes a power management indicator that indicates the mode to which the first wireless device intends to switch.

15. The apparatus of claim 12 , further comprising means for receiving an indication from the second wireless device instructing the first wireless device to switch to or to switch away from the TWT power save mode, wherein the determination is further based on the received indication.

16. The apparatus of claim 15 , wherein the indication includes the EOSP indicator set to 1.

17. The apparatus of claim 12 , further comprising means for determining a mode of the second wireless device.

18. The apparatus of claim 17 , wherein the means for determining the mode of the second wireless device is configured to receive a second message from the second wireless device, wherein second message includes a responder mode indicator that indicates whether the second wireless device is in a doze state outside of the TWT service periods, and the determination of the mode of the second wireless device is based on the responder mode indicator.

19. The apparatus of claim 17 , wherein the means for determining the mode of the second wireless device is configured to receive a trigger message from the second wireless device, and wherein the determination of the mode of the second wireless device is based on whether the trigger message includes resource allocations to any wireless devices.

20. The apparatus of claim 12 , further comprising means for receiving from the second wireless device a second message that includes a traffic indication map, wherein the traffic indication map indicates a mode of operation for the first wireless device to select, and wherein the determination is further based on the second message.

21. The apparatus of claim 12 , wherein the first wireless device is configured to switch from the TWT power save mode to the power save mode when there is no additional data for transmission or reception.

22. The apparatus of claim 12 , wherein the first wireless device is configured to switch from the TWT power save mode to the power save mode after receiving from the second wireless device the QoS message with the EOSP indicator set to 1.

23. An apparatus for wireless communication, the apparatus being a first wireless device, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
determine whether to switch to an active mode, a power save mode, or a target wake time (TWT) power save mode, wherein, during the TWT power save mode, the first wireless device enters an awake state during TWT service periods and enters a doze state outside of the TWT service periods, the at least one processor being configured to determine by:
determining if there is additional data for transmission or reception;
receiving from a second wireless device a quality of service (QoS) message with an end of service period (EOSP) indicator set to 1; or
receiving from the second wireless device a trigger message with a cascaded indicator set to 0 and the trigger message is not intended for the first wireless device; and

transmit a me

Assignees

• Qualcomm Inc

Inventors

• Asterjadhi Alfred
• Merlin Simone
• Tian Bin
• Cherian George
• Barriac Gwendolyn Denise

Classifications

• H04W72/30

  Resource management for broadcast services · CPC title

• H04W52/0216 Primary

  using a pre-established activity schedule, e.g. traffic indication frame · CPC title

• H04W52/0274

  by switching on or off the equipment or parts thereof · CPC title

• H04W52/0235

  where the received signal is a power saving command · CPC title

• H04W52/0212 Primary

  managed by the network, e.g. network or access point is leader and terminal is follower · CPC title