Method for efficient rediscovery and medium access for wake-up radios
Methods and apparatuses are described herein for rediscovery and medium access for wake-up radios. For example, a wireless transmit receive unit (WTRU) may receive, via a first transceiver, a frame that includes a wake-up radio (WUR) operation element having a first counter value. The WTRU may deactivate the first transceiver and activate a second transceiver, wherein the first transceiver enters into a doze state and the second transceiver is in an awake state. The WTRU may then receive, via the second transceiver in the awake state, a WUR frame that includes a second counter value indicating an update of a plurality of basic sewer set (BSS) parameters associated with the first transceiver. On a condition that the second counter value is different than the first counter value, the WTRU may activate the first transceiver to update the plurality of BSS parameters, wherein the first transceiver enters into an awake state.
1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
maintaining a Basic Service Set (BSS) parameter update counter associated with a BSS associated with a primary connectivity radio (PCR) transceiver;
receiving, via the PCR transceiver, a beacon frame or a wake-up radio (WUR) action frame that includes a WUR operation element having a first counter value indicating a current value of the BSS parameter update counter associated with the BSS of the PCR transceiver;
updating the BSS parameter update counter to the first counter value received in the WUR operation element;
deactivating the PCR transceiver and entering a WUR mode, wherein the PCR transceiver enters into a doze state;
receiving a WUR frame that includes a second counter value indicating that an update of a plurality of BSS parameters associated with the BSS of the PCR transceiver is available; and
on a condition that the second counter value is different than the BSS parameter update counter, activating the PCR transceiver to receive a beacon frame including an update of the plurality of BSS parameters.
2. The method of claim 1 , wherein the action frame is a WUR mode setup frame.
3. The method of claim 1 , further comprising activating a WUR transceiver to enter the WUR mode after the PCR transceiver is deactivated, wherein the WUR transceiver is a companion radio.
4. The method of claim 1 , wherein the WUR frame is a broadcast WUR wake-up frame.
5. The method of claim 1 , further comprising:
transmitting, via the PCR transceiver in the awake state, a response frame in response to the WUR frame.
6. A wireless transmit/receive unit (WTRU) comprising:
a primary connectivity radio (PCR) transceiver; and
a processor,
wherein the processor is configured to maintain a Basic Service Set (BSS) parameter update counter associated with a BSS of the PCR transceiver;
the processor and the PCR transceiver are configured to receive a beacon frame or a wake-up radio (WUR) action frame that includes a wake-up radio (WUR) operation element having a first counter value indicating a current value of the BSS parameter update counter associated with the BSS associated with the PCR transceiver;
the processor is further configured to:
update the BSS parameter update counter to the first counter value received in the WUR operation element;
deactivate the PCR transceiver and enter a WUR mode, wherein the PCR transceiver enters into a doze state;
receive, while in the WUR mode, a WUR frame that includes a second counter value indicating that an update of a plurality of BSS parameters associated with the BSS of the PCR transceiver is available; and
on a condition that the second counter value is different than the BSS parameter update counter, activate the PCR transceiver to receive a beacon frame including an update of the plurality of BSS parameters.
7. The WTRU of claim 6 , wherein the action frame is a WUR mode setup frame.
8. The WTRU of claim 6 , further comprising a WUR transceiver configured to activate the WUR transceiver to enter the WUR mode after the PCR transceiver is deactivated, wherein the WUR transceiver is a companion radio.
9. The WTRU of claim 6 , wherein the WUR frame is a broadcast WUR wake-up frame.
10. The WTRU of claim 6 , wherein the PCR transceiver in the awake state is further configured to transmit a response frame in response to the WUR frame.