Wireless communication device, wireless communication terminal and wireless communication method

A wireless communication device, comprising:

• a transmitter configured to transmit a first frame including first information required for generation of a trigger frame for uplink multi-user transmission, wherein the transmitter accesses a wireless medium using an access category associated with the first frame under CSMA/CA (Carrier Sense Multiple Access with Carrier Avoidance) to transmit the first frame, and the access category associated with the first frame is one of a plurality of access categories;
• and
• a receiver configured to
• receive an acknowledgement frame for the first frame in a first interframe space after the first frame is transmitted, and
• receive a second frame designating at least one terminal which is a target of the uplink multi-user transmission, wherein the second frame is the trigger frame,
• wherein the transmitter is configured to transmit a third frame in the uplink multiuser transmission when the wireless communication device is designated in the second frame,
• the first information includes:
• information indicating amounts of data in a plurality of buffers corresponding to the plurality of access categories;
• and
• information indicating an access category having a highest transmission priority among the plurality of access categories for the uplink multi-user transmission wherein the access category having the highest transmission priority is an access category of data which the wireless communication device most desires to transmit and is selected from the plurality of access categories by the wireless communication device, and
• the transmitter is configured to further transmit second information indicating a communication scheme of the multi-user transmission desired by the wireless communication device, the second information being used for determining the at least one terminal which is a target of the uplink multi-user transmission, wherein the second information is transmitted in a different frame from the first frame.

A wireless communication device, comprising:

• a transmitter configured to transmit a first frame including first information required for generation of a trigger frame for uplink multi-user transmission, wherein the transmitter accesses a wireless medium using an access category associated with the first frame under CSMA/CA (Carrier Sense Multiple Access with Carrier Avoidance) to transmit the first frame, and the access category associated with the first frame is one of a plurality of access categories;
• and
• a receiver configured to
• receive an acknowledgement frame for the first frame in a first interframe space after the first frame is transmitted, and
• receive a second frame designating at least one terminal which is a target of the uplink multi-user transmission wherein the second frame is the trigger frame,
• wherein the transmitter is configured to transmit a third frame in the uplink multiuser transmission when the wireless communication device is designated in the second frame,
• the first information includes:
• information indicating amounts of data in a plurality of buffers corresponding to the plurality of access categories;
• and
• information indicating an access category having a highest transmission priority among the plurality of access categories for the uplink multi-user transmission wherein the access category having the highest transmission priority is an access category of data which the wireless communication device most desires to transmit and is selected from the plurality of access categories by the wireless communication device,
• wherein the first frame includes no transmission request indicating that the wireless communication device does not desire to execute the uplink multi-user transmission for transmitting data, the second information being used for determining the at least one terminal which is a target of the uplink multi-user transmission.

A wireless communication device, comprising:

• a transmitter configured to transmit a first frame including first information required for generation of a trigger frame for uplink multi-user transmission, wherein the transmitter accesses a wireless medium using an access category associated with the first frame under CSMA/CA (Carrier Sense Multiple Access with Carrier Avoidance) to transmit the first frame, and the access category associated with the first frame is one of a plurality of access categories;
• and
• a receiver configured to
• receive an acknowledgement frame for the first frame in a first interframe space after the first frame is transmitted, and
• receive a second frame designating at least one terminal which is a target of the uplink multi-user transmission wherein the second frame is the trigger frame,
• wherein the transmitter is configured to transmit a third frame in the uplink multiuser transmission when the wireless communication device is designated in the second frame,
• the first information includes:
• a value indicating amounts of data in a plurality of buffers corresponding to the plurality of access categories;
• a basic unit of the value of indicating amounts of data wherein a data size can be calculated by multiplying the value indicating amounts of data and the basic unit;
• and
• information indicating an access category having a highest transmission priority among the plurality of access categories for the uplink multi-user transmission wherein the access category having the highest transmission priority is an access category of data which the wireless communication device most desires to transmit and is selected from the plurality of access categories by the wireless communication device.

A wireless communication device, comprising:

• a transmitter configured to transmit a first frame including first information required for generation of a trigger frame for uplink multi-user transmission, wherein the transmitter accesses a wireless medium using an access category associated with the first frame under CSMA/CA (Carrier Sense Multiple Access with Carrier Avoidance) to transmit the first frame, and the access category associated with the first frame is one of a plurality of access categories;
• and
• a receiver configured to
• receive an acknowledgement frame for the first frame in a first interframe space after the first frame is transmitted, and
• receive a second frame designating at least one terminal which is a target of the uplink multi-user transmission, wherein the second frame is the trigger frame,
• wherein the transmitter is configured to transmit a third frame in the uplink multiuser transmission when the wireless communication device is designated in the second frame, and
• the first information
• indicating amounts of data in a plurality of buffers corresponding to the plurality of access categories;
• and
• the transmitter is configured to transmit a fifth frame notifying presence or non-presence of a request of data transmission for each of the plurality of access categories.