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

1. A station (STA), the STA comprising:

a primary connectivity radio (PCR);

a wakeup radio (WUR); and

a processor, wherein

the PCR is configured to send, to an access point (AP), a first WUR frame including an indication of a request to enter WUR mode, WUR duty cycle information, WUR channel information recommending a WUR channel for the STA, and WUR data rate information;

the PCR is configured to receive, 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

the WUR is configured to turn on 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 WUR and the processor are configured to determine that the first WUR channel does not support reliable transmission based on the WUR 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:

the processor is configured to set a wakeup reason to a first reason;

the WUR is configured to turn off;

the PCR is configured to turn on and send, to the AP, a second WUR frame including at least the wakeup reason;

the PCR is configured to receive, from the AP, a third WUR frame with at least a second WUR channel assignment;

the PCR is configured to turn off; and

the WUR is configured to turn on 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 WUR is 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 first WUR channel has a narrow frequency bandwidth.

5. The STA of claim 1 , wherein:

the WUR and the processor are configured to determine that a data rate of a WUR transmission over the first WUR channel is too high based on the WUR not successfully receiving a WUR frame within a first duration while operating above a lowest data rate;

based on a determination that the data rate of the WUR transmission over the first WUR channel is too high:

the processor is configured to set a wakeup reason to a second reason;

the WUR is configured to turn off;

the PCR is configured to turn on and send, to the AP, a second WUR frame including at least the wakeup reason;

the PCR is configured to receive, from the AP, a third WUR frame with at least a first WUR data rate assignment;

the PCR is configured to turn off; and

the WUR is configured to turn on 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.

6. The STA of claim 1 , wherein:

the WUR and the processor are 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, the processor is configured to follow instructions in at least one received WUR frame.

7. The STA of claim 1 , wherein a set of previously negotiated WUR operating parameters were previously negotiated during an exchange of WUR setup information between the STA and the AP.

8. The STA of claim 7 , 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.

9. The STA of claim 1 , wherein:

the WUR is further configured to periodically power off and power on according to a WUR duty cycle and has an active receiver power consumption below 1 milliWatt (mW).

10. The STA of claim 1 configured as an 802.11 station (STA).

11. A method performed by a station (STA), the method comprising:

sending, using a primary connectivity radio (PCR), to an access point (AP), a first WUR frame including an indication of a request to enter WUR mode, WUR duty cycle information, WUR channel information recommending a WUR channel for the STA, and WUR data rate information;

receiving, using the PCR, 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

monitoring, using a wakeup radio (WUR), 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.

12. The method of claim 11 , further comprising:

determining that the first WUR channel does not support reliable transmission based on the WUR 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;

turning off the WUR;

turning on the PCR;

sending, using the PCR, to the AP, a second WUR frame including at least the wakeup reason;

receiving, using the PCR, from the AP, a third WUR frame with at least a second WUR channel assignment;

turning off the PCR;

turning on the WUR; and

using the WUR, the wireless medium for WUR signals, from the AP, on a second WUR channel according to the second WUR channel assignment.

13. The method of claim 12 , wherein the monitoring, using the WUR, 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.

14. The method of claim 11 , wherein the first WUR channel has a narrow frequency bandwidth.

15. The method of claim 11 , further comprising:

determining that a data rate of a WUR transmission over the first WUR channel is too high based on the WUR not successfully receiving a WUR frame within a first duration while operating above a lowest data rate;

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;

turning off the WUR;

turning on the PCR;

sending, using the PCR, to the AP, a second WUR frame including at least the wakeup reason;

receiving, using the PCR, from the AP, a third WUR frame with at least a first WUR data rate assignment;

turning off the PCR;

turning on the WUR; 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.

16. The method of claim 11 , 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.

17. The method of claim 11 , wherein a set of previously negotiated WUR operating parameters were previously negotiated during an exchange of WUR setup information between the STA and the AP.

18. The method of claim 17 , 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.

19. The method of claim 11 , further comprising:

periodically powering off and power on the WUR according to a WUR duty cycle, wherein the WUR has an active receiver power consumption below 1 milliWatt (mW).

20. The method of claim 11 , wherein the STA is configured as an 802.11 station (STA).