Access point and station multi-link device operation

A method performed by a multi-link device (MLD) station to establish a target wake time (TWT) with a MLD access point, wherein a plurality of links are established between the MLD access point and the MLD station, comprising:

• receiving, by the MLD station, a TWT set up frame from the MLD access point configured to indicate whether the TWT set up frame is applied to multiple links of the plurality of links;
• and
• negotiating, by the MLD station, a TWT agreement with the MLD access point via one of the multiple links with the MLD access point, wherein the TWT agreement applies to all of the indicated multiple links, and wherein TWT service periods in the indicated multiple links start at same time and end at same time, and have same trigger enabled/non-trigger enable and announced/unannounced parameters;
• wherein the TWT set up frame includes a link bitmap having a set of bits;
• wherein each of the bits corresponds to one specific link in the plurality of links and indicates whether the negotiated single TWT agreement is applied to the specific link;
• and
• tearing down, by the MLD station, the negotiated TWT agreement, wherein tearing down, by the MLD station, the negotiated TWT agreement comprises tearing down the TWT service periods of a TWT flow identifier of all of the indicated multiple links through a TWT teardown frame in one link.

A multi-link device (MLD) access point configured to establish a target wake time (TWT) with a MLD station, wherein a plurality of links are established between the MLD access point and the MLD station, comprising:

• a transmitter configured to
• transmit a TWT set up frame to the MLD station configured to indicate whether the TWT set up frame is applied to multiple links of the plurality of links;
• and
• a processor configured to
• negotiate a TWT agreement with the MLD station via one of the multiple links with the MLD station, wherein the TWT agreement applies to all of the indicated multiple links, and wherein TWT service periods in the indicated multiple links start at same time and end at same time, and have same trigger enabled/non-trigger enable and announced/unannounced parameters;
• wherein the TWT set up frame includes a link bitmap having a set of bits;
• wherein each of the bits corresponds to one specific link in the plurality of links and indicates whether the negotiated single TWT agreement is applied to the specific link, and
• wherein the processor is further configured to tear down the negotiated TWT agreement by tearing down the TWT service periods of a TWT flow identifier of all of the indicated multiple links through a TWT teardown frame in one link.

A multi-link device (MLD) station configured to establish a target wake time (TWT) with a MLD access point, wherein a plurality of links are established between the MLD access point and the MLD station, comprising:

• a receiver configured to
• receive a TWT set up frame to the MLD access point configured to indicate whether the TWT set up frame is applied to multiple links of the plurality of links;
• and
• a processor configured to
• negotiate a TWT agreement with the MLD access point via one of the multiple links with the MLD access point, wherein the TWT agreement applies to all of the indicated multiple links, and wherein TWT service periods in the indicated multiple links start at same time and end at same time, and have same trigger enabled/non-trigger enable and announced/unannounced parameters;
• wherein the TWT set up frame includes a link bitmap having a set of bits;
• wherein each of the bits corresponds to one specific link in the plurality of links and indicates whether the negotiated single TWT agreement is applied to the specific link, and
• wherein the processor is further configured to tear down the negotiated TWT agreement by tearing down the TWT service periods of a TWT flow identifier of all of the indicated multiple links through a TWT teardown frame in one link.