Method and apparatus for dealing with concurrent trigger-based block acknowledgements used in coordinated beamforming frame exchange sequence

A wireless communication method comprising:

• receiving a first physical layer protocol data unit (PPDU) from a first access point (AP) that performs a coordinated beamforming (Co-BF) transmission to a first non-AP station (STA) associated with the first AP;
• and
• transmitting a first block ack (BA) frame in a trigger-based (TB) format to the first AP, wherein the first BA frame carries information indicative of acknowledgement of the first PPDU;
• a period in which the first BA frame is transmitted overlaps a period in which a second BA frame is transmitted, where the second BA frame carries information indicative of acknowledgement of a second PPDU transmitted to a second non-AP STA associated with a second AP;
• and the first AP and the second AP comprise a Co-BF coordinating AP and a Co-BF coordinated AP.

An access point (AP) comprising:

• a network interface circuit;
• and
• a control circuit, configured to instruct the network interface circuit to:
• perform a coordinated beamforming (Co-BF) transmission to transmit a first physical layer protocol data unit (PPDU) to a first non-access point (non-AP) station (STA) associated with the AP;
• and
• receive a first block ack (BA) frame in a trigger-based (TB) format from the first non-AP STA;
• wherein the first BA frame carries information indicative of acknowledgement of the first PPDU;
• a period in which the first BA frame is transmitted overlaps a period in which a second BA frame is transmitted, where the second BA frame carries information indicative of acknowledgement of a second PPDU transmitted to a second non-AP STA associated with another AP;
• and the AP and the another AP comprise a Co-BF coordinating AP and a Co-BF coordinated AP.