TRANSMITTING STATION AND RECEIVING STATION

1 : A transmitting station comprising:

a first radio signal processing unit configured to transmit a radio signal by using a first channel;

a second radio signal processing unit configured to transmit a radio signal by using a second channel different from the first channel; and

a link management unit that establishes multi-link with a receiving station by using the first radio signal processing unit and the second radio signal processing unit and manages communication using the multi-link,

wherein

the link management unit is configured to distribute a plurality of data units into the first radio signal processing unit and the second radio signal processing unit,

the first radio signal processing unit is configured to transmit a first data unit group input from the link management unit among the plurality of data units to the receiving station, and transmit first information indicating a sequence number of a data unit included in the first data unit group to the receiving station, and

the second radio signal processing unit is configured to transmit a second data unit group input from the link management unit among the plurality of data units to the receiving station, and transmit second information indicating a sequence number of a data unit included in the second data unit group to the receiving station.

2 : The transmitting station according to claim 1 , wherein

the first radio signal processing unit is configured to add the first information to a radio frame for transmitting the first data unit group to the receiving station, and

the second radio signal processing unit is configured to add the second information to a radio frame for transmitting the second data unit group to the receiving station.

3 : The transmitting station according to claim 1 , wherein

the first radio signal processing unit is configured to add a first frame for requesting the receiving station to confirm delivery of the first data unit group to a radio frame for transmitting the first data unit group to the receiving station, and

the second radio signal processing unit is configured to add a second frame for requesting the receiving station to confirm delivery of the second data unit group to a radio frame for transmitting the second data unit group to the receiving station,

the first frame includes the first information, and

the second frame includes the second information.

4 : The transmitting station according to claim 1 , wherein

after transmitting the first data unit group to the receiving station, the first radio signal processing unit is configured to add a first frame for requesting the receiving station to confirm delivery of the first data unit group to the receiving station,

after transmitting the second data unit group to the receiving station, the second radio signal processing unit is configured to transmit a second frame for requesting the receiving station to confirm delivery of the second data unit group to the receiving station,

the first frame includes the first information, and

the second frame includes the second information.

5 : A receiving station comprising:

a first radio signal processing unit configured to receive a radio signal by using a first channel and store first information indicating a data reception status for each sequence number;

a second radio signal processing unit configured to receive a radio signal using a second channel different from the first channel and store second information indicating a data reception status for each sequence number; and

a link management unit configured to establish multi-link with a transmitting station by using the first radio signal processing unit and the second radio signal processing unit and manage communication using the multi-link,

wherein

in an operation in which the transmitting station distributes and transmits a plurality of data units to which sequence numbers are assigned to the first radio signal processing unit and the second radio signal processing unit,

when receiving third information indicating a sequence number of a data unit included in a first data unit group allocated to the first radio signal processing unit among the plurality of data units, the first radio signal processing unit is configured to set a sequence number of a data unit not transmitted to the first radio signal processing unit indicated by the third information and a sequence number of a data unit in which no error is detected to be received in the first information, and

when receiving fourth information indicating a sequence number of a data unit included in a second data unit group allocated to the second radio signal processing unit among the plurality of data units, the second radio signal processing unit is configured to set a sequence number of a data unit not transmitted to the second radio signal processing unit indicated by the fourth information and a sequence number of a data unit in which no error is detected to be received in the second information.

6 : The receiving station according to claim 5 , wherein

when receiving a first frame requesting confirmation of delivery of the first data unit group, the first radio signal processing unit is configured to transmit a radio frame including the first information to the transmitting station, and

when receiving a second frame requesting confirmation of delivery of the second data unit group, the second radio signal processing unit is configured to transmit a radio frame including the second information to the transmitting station.

7 : The receiving station according to claim 5 , wherein

the link management unit includes a buffer unit capable of storing an input data unit,

the first radio signal processing unit is configured to input a data unit in which no error is detected among the first data unit group received from the transmitting station to the buffer unit,

the second radio signal processing unit is configured to input a data unit in which no error is detected among the second data unit group received from the transmitting station to the buffer unit, and

the link management unit is configured to output a plurality of data units having ordered sequence numbers to an upper layer in response to the sequence numbers of the plurality of data units stored in the buffer unit being ordered.

8 : The receiving station according to claim 5 , wherein

the first radio signal processing unit includes a first buffer unit capable of storing a data unit,

the second radio signal processing unit includes a second buffer unit capable of storing a data unit,

the first radio signal processing unit is configured to input a data unit in which no error is detected among the first data unit group received from the transmitting station to the first buffer unit,

the second radio signal processing unit is configured to input a data unit in which no error is detected among the second data unit group received from the transmitting station to the second buffer unit, and

the link management unit is configured to output a plurality of data units having ordered sequence numbers to an upper layer in response to the sequence numbers of a combination of the data unit stored in the first buffer unit and the data unit stored in the second buffer unit being ordered.