| CPC H04W 40/02 (2013.01) [H04W 12/06 (2013.01); H04W 12/73 (2021.01); H04W 28/06 (2013.01); H04W 84/12 (2013.01)] | 20 Claims |

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1. A method for use in a-station (STA), comprising:
receiving a medium access control (MAC) frame which includes a frame control field, wherein the frame control field includes a first subfield indicating a type of the MAC frame, and a second subfield indicating a subtype of the MAC frame;
and
processing a third subfield based on both a value of the second subfield and a value of the first subfield together indicating that, for the type of the MAC frame, the third subfield is present in the MAC frame.
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