Wireless communication device and wireless communication method

1. A wireless communication device comprising:

a transmitter of the wireless communication device configured to transmit first information specifying at least one resource block to request to allocate among a plurality of resource blocks to a first wireless communication device; and

a receiver of the wireless communication device configured to receive second information specifying at least one resource block allocated depending on the first information;

wherein the transmitter of the wireless communication device is configured to transmit a signal to the first wireless communication device via the resource block specified in the second information wherein the signal is transmitted simultaneously with another signal transmitted to the first wireless communication device from a second wireless communication device via a resource block different from the resource block specified in the second information among the plurality of resource blocks,

the receiver of the wireless communication device is configured to receive a signal via the resource block specified in the second information among signals transmitted by the first wireless communication device.

2. The wireless communication device according to claim 1 , further comprising:

controlling circuitry configured to select the at least one resource block to request to allocate, based on carrier-sensing of a plurality of frequency channels,

wherein the first information specifies the selected at least one resource block and a frequency channel including the selected at least one resource block.

3. The wireless communication device according to claim 2 , wherein the controlling circuitry is configured to select two or more consecutive resource blocks.

4. The wireless communication device according to claim 1 , wherein

the first information includes

at least one set of:

a smallest or largest resource block number of consecutive resource blocks to request to allocate; and resource block width information specifying a number or bandwidth of the consecutive resource blocks to request to allocate, or

at least one set of a smallest resource block number and a largest resource block number of consecutive resource blocks to request to allocate.

5. The wireless communication device according to claim 1 , wherein the transmitter is configured to transmit information representing a reason for selection of the resource block to request to allocate.

6. The wireless communication device according to claim 1 , further comprising controlling circuitry configured to perform a standby operation for reception of a frame at the resource block specified in the second information.

7. The wireless communication device according to claim 6 , wherein

in a case where the resource block specified in the second information is not included in a predetermined frequency channel, the controlling circuitry is configured to perform the standby operation also at the predetermined frequency channel as well as the resource block specified in the second information.

8. The wireless communication device according to claim 1 , further comprising:

controlling circuitry configured to perform standby operation for reception of a frame and for reception of a signal at a part of resource blocks specified in the second information, and perform carrier sensing at other resource blocks than the part of the resource blocks among the resource blocks specified in the second information,

wherein when the receiver receives via the part of the resource blocks specified in the second information, a first frame to request a transmission authorization, the transmitter is configured to transmit second frames notifying the transmission authorization via a resource block indicative of carrier-sensing result of an idle state and the resource block used for reception of the first frame, and

the controlling circuitry is configured to perform a standby operation for reception of a third frame at the resource block used for transmission of the second frames.

9. The wireless communication device according to claim 1 , wherein the transmitter is configured to transmit a fourth frame to request connection, wherein the fourth frame includes the first information.

10. The wireless communication device according to claim 1 , further comprising:

controlling circuitry, wherein

the receiver is configured to receive third information from the first wireless communication device,

the controlling circuitry configured to determine based on the third information whether the first wireless communication device has a capability of a communication scheme for performing simultaneously and independently transmission and reception via a plurality of frequency channels,

wherein when the first wireless communication device does not have the capability, the transmitter is configured to transmit a fourth frame to request connection via one or more frequency channels, wherein the one or more frequency channels includes a predetermined first channel, and the fourth frame includes the first information.

11. The wireless communication device according to claim 1 , further comprising:

controlling circuitry, wherein

the receiver is configured to receive third information from the first wireless communication device,

the controlling circuitry configured to determine based on the third information whether the first wireless communication device has a capability of a communication scheme for performing simultaneously and independently transmission and reception via a plurality of frequency channels,

wherein when the first wireless communication device has the capability, the transmitter is configured to transmit a fourth frame to request connection via a part or all of at least one frequency channel including the resource block specified in the first information, wherein the fourth frame includes the first information.

12. The wireless communication device according to claim 1 , further comprising at least one antenna.

13. A wireless communication method comprising:

transmitting first information specifying at least one resource block to request to allocate among a plurality of resource blocks to a first wireless communication device, wherein the plurality of resource blocks are included in at least one frequency channel; and

receiving second information specifying at least one resource block allocated depending on the first information;

transmitting a signal to the first wireless communication device via the resource block specified in the second information wherein the signal is transmitted simultaneously with another signal transmitted to the first wireless communication device from a second wireless communication device via a resource block different from the resource block specified in the second information among the plurality of resource blocks; and

receiving a signal via the resource block specified in the second information among signals transmitted by the first wireless communication device via a part or all of the plurality of the resource blocks included in the at least one frequency channel, and

each of the plurality of resource blocks is a frequency resource including one or more successive subcarriers in a frequency domain as a unit.

14. The wireless communication method according to claim 13 , further comprising:

selecting the at least one resource block to request to allocate, based on carrier-sensing of a plurality of frequency channels,

wherein the first information specifies the selected at least one resource block and the frequency channel including the selected at least one resource block.

15. The wireless communication method according to claim 14 , further comprising: selecting two or more consecutive resource blocks.

16. The wireless communication method according to claim 13 , wherein

the first information includes

at least one set of:

a smallest or largest resource block number of consecutive resource blocks to request to allocate; and resource block width information specifying a number or bandwidth of the consecutive resource blocks to request to allocate, or

at least one set of a smallest resource block number and a largest resource block number of consecutive resource blocks to request to allocate.

17. The wireless communication method according to claim 13 , further comprising: transmitting information representing a reason for selection of the resource block to request to allocate.

18. The wireless communication method according to claim 13 , further comprising: performing a standby operation for reception of a frame at the resource block specified in the second information.

19. The wireless communication method according to claim 18 , wherein

the method comprising: performing, in a case where the resource block specified in the second information is not included in a predetermined frequency channel, the standby operation also at the predetermined frequency channel as well as the resource block specified in the second information.

20. The wireless communication method according to claim 13 , further comprising: performing standby operation for reception of a frame and for reception of a signal at a part of resource blocks specified in the second information, and perform carrier sensing at other resource blocks than the part of the resource blocks among the resource blocks specified in the second information,

receiving a first frame to request a transmission authorization addressed to the first wireless communication device via the part of the resource blocks specified in the second information,

transmitting second frames notifying the transmission authorization via a resource block indicative of carrier-sensing result of an idle state and the resource block used for reception of the first frame, and

performing a standby operation for reception of a third frame at the resource block used for transmission of the second frames.