US 11,943,665 B2
Apparatus and methods for power save in multi-link wireless systems
Young Hoon Kwon, Laguna Niguel, CA (US); Liwen Chu, San Ramon, CA (US); and Hongyuan Zhang, Fremont, CA (US)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Jun. 3, 2021, as Appl. No. 17/337,995.
Claims priority of provisional application 63/090,839, filed on Oct. 13, 2020.
Claims priority of provisional application 63/046,207, filed on Jun. 30, 2020.
Claims priority of provisional application 63/033,914, filed on Jun. 3, 2020.
Prior Publication US 2021/0385692 A1, Dec. 9, 2021
Int. Cl. H04W 28/24 (2009.01); H04W 40/24 (2009.01); H04W 52/02 (2009.01); H04W 76/11 (2018.01); H04W 76/15 (2018.01)
CPC H04W 28/24 (2013.01) [H04W 40/244 (2013.01); H04W 52/0229 (2013.01); H04W 52/0235 (2013.01); H04W 76/11 (2018.02); H04W 76/15 (2018.02)] 30 Claims
OG exemplary drawing
 
1. A method for power save operation by a non-access point (non-AP) multi-link device (MLD), wherein a plurality of links are established between the non-AP MLD and an AP MLD, the method comprising:
setting, by the non-AP MLD, a QoS capability for a first 802.11 access category to a first state for all links of the plurality of links that the non-AP MLD operates;
transmitting, by the non-AP MLD, a first management frame to the AP MLD, wherein the first management frame is used to request a multi-link setup with the AP MLD, and wherein the first management frame includes a first element that comprises the setting of the QoS capability for the first 802.11 access category;
receiving, by the non-AP MLD, a second management frame from the AP MLD, wherein the second management frame includes information for an association ID (AID) that corresponds to the non-AP MLD, wherein the AID is assigned to the non-AP MLD regardless of the number of links in the plurality of links; and
receiving, by the non-AP MLD, a third management frame from the AP MLD, wherein the third management frame comprises a partial virtual bitmap and a bit in the partial virtual bitmap corresponding to the AID is set to indicate if the first state is a nondelivery-enabled access category and the AP MLD has buffered buffer units (BU) of the first 802.11 access category for the non-AP MLD.