Wireless communication device, wireless communication terminal and wireless communication method
According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including first information required for uplink multi-user transmission without receiving a transmission request for the first information; and a receiver configured to receive a second frame.
1. 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 in elapse of a predetermined time after the second frame is received when the wireless communication device is designated in the second frame, and
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.
2. The wireless communication device according to claim 1 , wherein the predetermined time is a SIFS (Short InterFrame Space).
3. The wireless communication device according to claim 1 , comprising:
a processor configured to control the transmitter and the receiver.
4. The wireless communication device according to claim 1 , comprising:
a clock generating circuit configured to generate a clock,
wherein the clock generating circuit outputs the clock to a host.
5. The wireless communication device according to claim 1 , comprising:
a power source configured to supply power to the transmitter and the receiver,
a wireless power feeding circuit configured to supply power to the transmitter and the receiver wirelessly, and
a power supply controlling circuit configured to select the power source or the wireless power feeding circuit and supply power to the transmitter and the receiver with a selected one of the power source or the wireless power feeding circuit.
6. The wireless communication device according to claim 1 , comprising:
a controlling circuit configured to control the transmitter and the receiver, and
a SIM (Subscriber Identity Module) card for authenticate processing, which is connected to the controlling circuit.
7. The wireless communication device according to claim 1 , comprising:
a video image compressing circuit configured to compress a video image and
a video image decompressing circuit configured to decompress a compressed video image,
wherein the transmitter is configured to transmit a video image compressed by the video image compressing circuit and
the receive is configured to receive a compressed video image and provide the received compressed video image to the video image decompressing circuit.
8. The wireless communication device according to claim 1 , comprising:
a LED configured to indicate an operation state of the wireless communication device.
9. The wireless communication device according to claim 1 , comprising:
a vibrator configured to indicate an operation state of the wireless communication device.
10. The wireless communication device according to claim 1 , comprising:
a communication processor to control communication; and
a displaying device configured to receive information indicating an operation state of the wireless communication device from the communication processor and display the information for a user.
11. 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.
12. The wireless communication device according to claim 11 , wherein the communication scheme includes at least one of an average data rate or a minimum physical rate.
13. 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.
14. 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.
15. 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.
16. The wireless communication device according to claim 15 , wherein the receiver is configured to receive a fourth frame for inquiring presence or non-presence of a request for the multi-user transmission, and the transmitter is configured to transmit the fifth frame in reply to the fourth frame.