Wireless communication device

1 . A wireless communication device in a first wireless communication group,

wherein:

the first wireless communication group includes a first terminal;

the first wireless communication group and a second wireless communication group are in an extended service set;

the second wireless communication group includes a second wireless communication device and a second terminal;

the wireless communication device is configured to:

receive a first frame for allocating a part of a first transmission opportunity of a communication medium to the wireless communication device, the transmission opportunity being obtained by the second wireless communication device; and

transmit a second transmission frame to the first terminal when using the part, the second transmission frame including a first field including information indicating the part;

the first terminal is configured to generate first information indicating that the communication medium is virtually busy during the part based on the information in the first field, and to transmit a third frame including the first information in response to the second transmission frame;

the part of the first transmission opportunity includes a first channel;

the first terminal is configured to transmit the third frame using a second channel; and

the second channel overlaps the first channel.

2 . The wireless communication device of claim 1 , wherein:

the wireless communication device is configured to transmit a physical packet to the first terminal when using the part; and

the physical packet includes a physical header including a second field including the information indicating the part.

3 . The wireless communication device of claim 2 , wherein the first terminal is configured to generate information indicating that the communication medium is busy during the part based on the information in the second field.

4 . The wireless communication device of claim 1 , wherein the wireless communication device is configured to:

acquire a transmission opportunity of a packet;

acquire a second transmission opportunity of the communication medium; and

transmit a fourth frame to the second wireless communication device, wherein the fourth frame is for allocating a part of the second transmission opportunity to the second wireless communication device.

5 . The wireless communication device of claim 4 , wherein:

the fourth frame includes a third field and a fourth field;

the third field includes information indicating the part of the second transmission opportunity; and

the fourth field includes an identifier of the second wireless communication device.

6 . The wireless communication device of claim 5 , wherein:

the wireless communication device is configured to allocate the part of the second transmission opportunity to the first terminal by using the fourth frame;

the fourth field includes the identifier of the second wireless communication device or an identifier of the first terminal;

the identifier of the first terminal has a value in a first range;

the identifier of the second wireless communication device has a value in a second range; and

the second range is different from the first range.

7 . The wireless communication device of claim 1 , wherein:

the wireless communication device conforms to 802.11ax standard; and

the first field is a Duration/ID field.

8 . The wireless communication device of claim 2 , wherein:

the wireless communication device conforms to 802.11ax standard; and

the second field is a TXOP field.

9 . The wireless communication device of claim 5 , wherein:

the wireless communication device conforms to 802.11ax standard; and

the fourth field is an AID12 field.