Power save method, access point device, and station device

Patent metadata

Field	Value
Publication number	US-9736776-B2
Application number	US-201615066939-A
Country	US
Kind code	B2
Filing date	Mar 10, 2016
Priority date	Feb 1, 2011
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A power save method, an AP device and an STA device are provided. According to whether power save is allowed in a current TXOP and whether a station STA is newly added in an operation object identifier of a subsequent frame of each frame of the current TXOP, the AP device respectively sets a TXOP power save indication of each frame, and when the TXOP power save indication of the current frame is power save allowed, the STA device determines whether to enter the Doze state according to a judgment result for a doze condition. The adoption of the method and the device can expand the power save application range, and enhance the power save effect.

First claim

What is claimed is:

1. A power save method, comprising:
sending, by an access point (AP), multiple frames of a current transmit opportunity (TXOP) to a station (STA), wherein each frame comprises a TXOP power save indication, the TXOP power save indication of each frame is a B22 bit in a very high throughput signal A1 (VHT-SIG-A1) field of each frame; and in a same TXOP, a value of the TXOP power save indication of the multiple frames is only allowed to change once;
wherein that in the same TXOP, the value of the TXOP power save indication of the multiple frames is only allowed to change once comprises at least one of:
when a TXOP power save indication of a previous frame is power save forbidden, a TXOP power save indication of a current frame is allowed to be set to power save allowed;
and
when the TXOP power save indication of the previous frame is power save allowed, the TXOP power save indication of the current frame is disallowed to be set to power save forbidden.

2. The method according to claim 1 , wherein the value of the TXOP power save indication of the multiple frames is only allowed to change from a power save forbidden indication to a power save allowed indication in the same TXOP.

3. The method according to claim 1 , wherein the TXOP power save indication is a No TXOP power save indication.

4. A power save method, comprising:
receiving, by a station (STA), multiple frames of a current transmit opportunity (TXOP) from an access point (AP); and
when a TXOP power save indication of a current frame is power save allowed, determining, by the STA device, whether to enter a doze state according to a judgment result for a doze condition, wherein each frame comprises a TXOP power save indication, the TXOP power save indication of each frame is a B22 bit in a very high throughput signal A1 (VHT-SIG-A1) field of each frame;
wherein, in a same TXOP, a value of the TXOP power save indication of the multiple frames is only allowed to change once;
wherein that in the same TXOP, the value of the TXOP power save indication of the multiple frames is only allowed to change once comprises at least one of:
when a TXOP power save indication of a previous frame is power save forbidden, the TXOP power save indication of the current frame is allowed to be set to power save allowed;
and
when the TXOP power save indication of the previous frame is power save allowed, the TXOP power save indication of the current frame is disallowed to be set to power save forbidden.

5. The method according to claim 4 , wherein the value of the TXOP power save indication of the multiple frames is only allowed to change from a power save forbidden indication to a power save allowed indication in the same TXOP.

6. The method according to claim 4 , wherein the TXOP power save indication is a No TXOP power save indication.

7. An access point (AP) device, comprising:
a processor, configured to set a transmit opportunity (TXOP) power save indication of each of multiple frames of a current TXOP, wherein in a same TXOP, a value of the TXOP power save indication of the multiple frames is only allowed to change once; and
a transmitter, configured to send the multiple frames to a station (STA), wherein each frame comprises the TXOP power save indication, the TXOP power save indication of each frame is a B22 bit in a very high throughput signal A1 (VHT-SIG-A1) field of each frame;
wherein that in the same TXOP, the value of the TXOP power save indication of the multiple frames is only allowed to change once comprises at least one of:
when a TXOP power save indication of a previous frame is power save forbidden, a TXOP power save indication of a current frame is allowed to be set to power save allowed;
and
when the TXOP power save indication of the previous frame is power save allowed, the TXOP power save indication of the current frame is disallowed to be set to power save forbidden.

8. The device according to claim 7 , wherein
the value of the TXOP power save indication of the multiple frames is only allowed to change from a power save forbidden indication to a power save allowed indication in the same TXOP.

9. The device according to claim 7 , wherein the TXOP power save indication is a No TXOP power save indication.

10. A station (STA) device, comprising:
a receiver, configured to receive multiple frames of a current transmit opportunity (TXOP) from an access point (AP), wherein each frame comprises a TXOP power save indication, the TXOP power save indication of each frame is a B22 bit in a very high throughput signal A1 (VI-IT-SIG-A1) field of each frame; and in a same TXOP, a value of the TXOP power save indication of the multiple frames is only allowed to change once; and
a processor, configured to: when a TXOP power save indication of a current frame is power save allowed, determine whether to enter a doze state according to a judgment result for a doze condition;
wherein that in the same TXOP, the value of the TXOP power save indication of the multiple frames is only allowed to change once comprises at least one of:
when a TXOP power save indication of a previous frame is power save forbidden, the TXOP power save indication of the current frame is allowed to be set to power save allowed;
and
when the TXOP power save indication of the previous frame is power save allowed, the TXOP power save indication of the current frame is disallowed to be set to power save forbidden.

11. The device according to claim 10 , wherein
the value of the TXOP power save indication of the multiple frames is only allowed to change from a power save forbidden indication to a power save allowed indication in the same TXOP.

12. The device according to claim 10 , wherein the TXOP power save indication is a No TXOP power save indication.

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhu Hufei
• Li Yunbo

Classifications

• H04W52/0235

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

• H04W52/0222 Primary

  in packet switched networks · CPC title

• H04W88/08

  Access point devices · CPC title

• H04W52/0216

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

• H04W88/02

  Terminal devices · CPC title