Procedures and mechanisms for narrowband multi-channel transmission for wake up radios

Patent metadata

Field	Value
Publication number	US-12593278-B2
Application number	US-202418902579-A
Country	US
Kind code	B2
Filing date	Sep 30, 2024
Priority date	May 5, 2017
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

Procedures and mechanisms for narrowband multi-channel transmission for wakeup radio (WUR) operation are disclosed. A station (STA) operating in WUR mode may have its a primary connectivity radio (PCR) turned off and its WUR turned and operating according to previously negotiated WUR operating parameters. The STA may monitor, for WUR beacons and frames over a first WUR channel, and determine that the first WUR channel does not support reliable transmission based on no beacons being received within a first duration. The STA may turn off the WUR, and turn on the PCR to send a first short WUR frame including a wakeup reason, and receive a second short WUR frame with a WUR channel assignment. The STA may turn off the PCR, turn on the WUR, and monitor for WUR signals on a second WUR channel according to the WUR channel assignment and the previously negotiated WUR operating parameters.

First claim

What is claimed:

1 . A station (STA) comprising:
a transceiver; and a processor, wherein the transceiver and the processor are configured to: send in a main radio operating mode, to an access point (AP), a first wakeup radio (WUR) frame including an indication of a request to enter WUR mode, and WUR channel information recommending a WUR channel for the STA; receive in the main radio operating mode, from the AP, in response to the first WUR frame, a second WUR frame including an indication of a first WUR channel assignment and an indication of a WUR beacon interval; and switch to a WUR operating mode and monitor a wireless medium for WUR signals, from the AP, on a first WUR channel in accordance with the indicated first WUR channel assignment and the indicated WUR beacon interval.

2 . The STA of claim 1 , wherein the transceiver and the processor are further configured to:
determine that the first WUR channel does not support reliable transmission based on not successfully receiving a WUR frame within a first duration while operating at a lowest channel rate; and based on a determination that the first WUR channel does not support reliable transmission:
set a wakeup reason to a first reason;
switch to the main radio operating mode and send, to the AP, a third WUR frame including at least the wakeup reason;
receive, from the AP, a fourth WUR frame with at least a second WUR channel assignment; and
switch to the WUR operating mode and monitor the wireless medium for WUR signals, from the AP, on a second WUR channel according to the second WUR channel assignment.

3 . The STA of claim 1 , wherein the transceiver and the processor are configured to monitor the wireless medium for WUR signals, from the AP, on the first WUR channel using a set of previously negotiated WUR operating parameters, wherein the first WUR channel assignment overrides a WUR channel assignment in the set of previously negotiated WUR operating parameters.

4 . The STA of claim 1 , wherein the transceiver and the processor are further configured to:
determine that a data rate of a WUR transmission over the first WUR channel is too high based on not successfully receiving a WUR frame within a first duration while operating above a lowest data rate; and based on a determination that the data rate of the WUR transmission over the first WUR channel is too high:
set a wakeup reason to a second reason;
switch to the main radio operating mode and send, to the AP, a third WUR frame including at least the wakeup reason;
receive, from the AP, a fourth WUR frame with at least a first WUR data rate assignment; and
switch to the WUR operating mode and monitor the wireless medium for WUR signals, from the AP, according to the first WUR data rate assignment and a set of previously negotiated WUR operating parameters, wherein the first WUR data rate assignment overrides a WUR data rate assignment in the set of previously negotiated WUR operating parameters.

5 . The STA of claim 1 , wherein
the transceiver and the processor are further configured to: determine that the first WUR channel supports reliable transmission based on the WUR successfully receiving a beacon within a first duration and WUR frames within a second duration; and based on a determination that the first WUR channel supports reliable transmission, follow instructions in at least one received WUR frame.

6 . The STA of claim 1 , wherein the transceiver and the processor are configured to monitor the wireless medium for WUR signals, from the AP, on the first WUR channel using a set of previously negotiated WUR operating parameters, wherein the set of previously negotiated WUR operating parameters includes at least one of the following: a WUR channel assignment; a WUR data rate; a WUR channel hopping pattern; a WUR start time; a set of operating WUR channels; WUR beacon information; WUR synchronization information; a WUR maximum monitoring duration; a WUR station identity (ID) assigned to the STA; WUR duty cycle information; or short WUR negotiation information.

7 . The STA of claim 1 configured as an 802.11 STA.

8 . A method performed by a station (STA), the method comprising:
sending, in a main radio operating mode, to an access point (AP), a first wakeup radio (WUR) frame including an indication of a request to enter WUR mode, and WUR channel information recommending a WUR channel for the STA; receiving, in the main radio operating mode, from the AP, in response to the first WUR frame, a second WUR frame including an indication of a first WUR channel assignment and an indication of a WUR beacon interval; and switching to a WUR operating mode and monitoring a wireless medium for WUR signals, from the AP, on a first WUR channel in accordance with the indicated first WUR channel assignment and the indicated WUR beacon interval.

9 . The method of claim 8 , further comprising:
determining that the first WUR channel does not support reliable transmission based on not successfully receiving a WUR frame within a first duration while operating at a lowest channel rate; and based on a determination that the first WUR channel does not support reliable transmission:
setting a wakeup reason to a first reason;
switching to the main radio operating mode and sending to the AP, a third WUR frame including at least the wakeup reason;
receiving from the AP, a fourth WUR frame with at least a second WUR channel assignment; and
switching to the WUR operating mode and monitoring the wireless medium for WUR signals, from the AP, on a second WUR channel according to the second WUR channel assignment.

10 . The method of claim 8 , wherein the monitoring the wireless medium for WUR signals, from the AP, on the first WUR channel is based on a set of previously negotiated WUR operating parameters, wherein the first WUR channel assignment overrides a WUR channel assignment in the set of previously negotiated WUR operating parameters.

11 . The method of claim 8 , further comprising:
determining that a data rate of a WUR transmission over the first WUR channel is too high based on not successfully receiving a WUR frame within a first duration while operating above a lowest data rate; and based on a determination that the data rate of the WUR transmission over the first WUR channel is too high:
setting a wakeup reason to a second reason;
switching to the main radio operating mode and sending, to the AP, a third WUR frame including at least the wakeup reason;
receiving, from the AP, a fourth WUR frame with at least a first WUR data rate assignment; and
switching to the WUR operating mode and monitoring the wireless medium for WUR signals, from the AP, according to the first WUR data rate assignment and a set of previously negotiated WUR operating parameters, wherein the first WUR data rate assignment overrides a WUR data rate assignment in the set of previously negotiated WUR operating parameters.

12 . The method of claim 8 , further comprising:
determining that the first WUR channel supports reliable transmission based on the WUR successfully receiving a beacon within a first duration and WUR frames within a second duration; and based on a determination that the first WUR channel supports reliable transmission, following instructions in at least one received WUR frame.

13 . The method of claim 8 , wherein the monitoring the wireless medium for WUR signals, from the AP, on the first WUR channel is based on a set of previously negotiated WUR operating parameters, wherein the set of previously negotiated WUR operating parameters includes at least one of the following: a WUR channel assignment; a WU

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Lou Hanqing
• Wang Xiaofei J
• Oteri Oghenekome
• Sahin Alphan
• Sun Li-Hsiang
• Yang Rui

Classifications

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W28/16 Primary

  Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service] · CPC title

• H04W76/28

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• H04W52/0225 Primary

  using monitoring of external events, e.g. the presence of a signal · CPC title

• Y02D30/70

  in wireless communication networks · CPC title