Wireless communication method and wireless communication terminal for receiving data from plurality of wireless communication terminals

A wireless communication terminal communicating wirelessly with a base wireless communication terminal comprising:

• a transceiver;
• and
• a processor,
• wherein the processor is configured to:
• receive, by using the transceiver, a multi-station Block ACK frame which indicates whether at least one of medium access control (MAC) frames transmitted from at least one of wireless communication terminals is received from the base wireless communication terminal,
• when the wireless communication terminal is associated with the base wireless communication terminal and a first field of the multi-station Block ACK frame includes an association identifier corresponding to an association of the wireless communication terminal with the base wireless communication terminal, determine whether a MAC frame transmitted from the wireless communication terminal is received by the base wireless communication terminal based on a value of bit of a second field, which is corresponding to the MAC frame, and
• when the wireless communication terminal is unassociated with the base wireless communication terminal and the first field of the multi-station Block ACK frame includes an identifier for an unassociated wireless communication terminal, determine whether a MAC frame transmitted from the wireless communication terminal is received by the base wireless communication terminal based on whether the second field of the multi-station Block Ack frame includes a MAC address of the wireless communication terminal,
• wherein the identifier for an unassociated wireless communication terminal is not allocated through an association with the base wireless communication terminal and not used for an associated wireless communication terminal, and
• wherein a value of the identifier for an unassociated wireless communication terminal is out of a range of values that is able to be allocated for the association identifier, larger than 2007, and a value pre-known to both the base wireless communication terminal and the wireless communication terminal.

An operation method of a wireless communication terminal communicating with a base wireless communication terminal wirelessly, the method comprising:

• receiving a multi-station Block ACK frame which indicates whether at least one of medium access control (MAC) frames transmitted from at least one of wireless communication terminals is received from the base wireless communication terminal,
• when the wireless communication terminal is associated with the base wireless communication terminal and a first field of the multi-station Block ACK frame includes an association identifier corresponding to an association of the wireless communication terminal with the base wireless communication terminal, determining whether a MAC frame transmitted from the wireless communication terminal is received by the base wireless communication terminal based on a value of bit of a second field, which is corresponding to the MAC frame, and
• when the wireless communication terminal is unassociated with the base wireless communication terminal and the first field of the multi-station Block ACK frame includes an identifier for an unassociated wireless communication terminal, determining whether a MAC frame transmitted from the wireless communication terminal is received by the base wireless communication terminal based on whether the second field of the multi-station Block ACK frame includes a MAC address of the wireless communication terminal,
• wherein the identifier for an unassociated wireless communication terminal is not allocated through an association with the base wireless communication terminal and not used for an associated wireless communication terminal, and
• wherein a value of the identifier for an unassociated wireless communication terminal is out of a range of values that is able to be allocated for the association identifier, larger than 2007, and a value pre-known to both the base wireless communication terminal and the wireless communication terminal.