TRANSMITTING STATION AND RECEIVING STATION
A transmitting station (TX) of an embodiment includes first and second radio signal processing units (STA 1 and STA 2 ) and a link management unit (LM). The first and second radio signal processing units are configured to be able to transmit a radio signal using first and second channels, respectively, and store information indicating a sequence number of data to be transmitted. The link management unit establishes multi-link with the receiving station by using the first radio signal processing unit and the second radio signal processing unit, and manages communication using the multi-link. The link management unit distributes a plurality of data units to the first and second radio signal processing units. The first radio signal processing unit transmits a first data unit group input from the link management unit among the plurality of data units to the receiving station, and stores first information (TBM) indicating the sequence number of the data unit included in the first data unit group.
1 . A transmitting station comprising:
a first radio signal processing unit configured to transmit a radio signal by using a first channel and store information indicating a sequence number of data to be transmitted;
a second radio signal processing unit configured to transmit a radio signal by using a second channel different from the first channel and store information indicating a sequence number of data to be transmitted; and
a link management unit configured to establish multi-link with a receiving station by using the first radio signal processing unit and the second radio signal processing unit and manage 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 store first information indicating a sequence number of a data unit included in the first data unit group, 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 store second information indicating a sequence number of a data unit included in the second data unit group.
2 . The transmitting station according to claim 1 , wherein
when receiving a first frame including third information indicating a reception status of the first data unit group from the receiving station, the first radio signal processing unit is configured to determine whether a data unit included in the transmitted first data unit group has been successfully delivered based on a reception status of a sequence number matching a sequence number indicated by the first information among sequence numbers indicated by the third information, and
when receiving a second frame including fourth information indicating a reception status of the second data unit group from the receiving station, the second radio signal processing unit is configured to determine whether a data unit included in the transmitted second data unit group has been successfully delivered based on a reception status of a sequence number matching a sequence number indicated by the second information among sequence numbers indicated by the fourth information.
3 . The transmitting station according to claim 2 , wherein
the first radio signal processing unit includes a first buffer unit capable of storing the first data unit group, and
the second radio signal processing unit includes a second buffer unit capable of storing the second data unit group.
4 . The transmitting station according to claim 2 , wherein
the first radio signal processing unit is configured to set a data unit determined to have failed to be delivered on a basis of the first information and the third information as a retransmission target, and
the second radio signal processing unit is configured to set a data unit determined to have failed to be delivered on a basis of the second information and the fourth information as a retransmission target.
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 is 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 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 output a data unit in which no error is detected among the received first data unit group to the link management unit,
when receiving 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 output a data unit in which no error is detected among the received second data unit group to the link management unit, and
the link management unit is configured to rearrange the data unit received from the first radio signal processing unit and the data unit received from the second radio signal processing unit according to sequence numbers, and output the plurality of data units with ordered sequence numbers to an upper layer.