TRANSMITTING STATION AND RECEIVING STATION
A transmitting station (TX) according to an embodiment includes first and second wireless signal processing units (STA1 and STA2) and a link management unit (LM). The first and second wireless signal processing units transmit wireless signals using first and second channels, respectively. The link management unit establishes multi-link with a receiving station. The link management unit manage communication in which the multi-link are used and store first information (TBM) indicating a sequence number of transmission target data. When second information (RBM) indicating the sequence number of the data received by the receiving station is received from the receiving station via the first or second wireless signal processing unit, the link management unit sets a bit corresponding to the sequence number indicated by the second information in the first information as a transmitted bit.
1 . A transmitting station comprising:
a first wireless signal processing unit configured to transmit a wireless signal by using a first channel;
a second wireless signal processing unit configured to transmit a wireless signal by using a second channel different from the first channel; and
a link management unit configured to establish multi-link with a receiving station by using the first wireless signal processing unit and the second wireless signal processing unit, manage communication in which the multi-link are used, and store first information indicating a reception status of transmission target data, wherein
when second information indicating a sequence number of data which has been received by the receiving station is received from the receiving station via the first wireless signal processing unit or the second wireless signal processing unit, the link management unit is configured to set a reception status of data corresponding to the sequence number indicated by the second information in the first information as a transmitted status.
2 . The transmitting station according to claim 1 , wherein
the link management unit is configured to cause the receiving station to transmit data that has not been received when it is confirmed that the data that has not been received by the receiving station remains in the reception status updated based on the second information.
3 . The transmitting station according to claim 1 , wherein
when it is confirmed that data that has not been received by the receiving station remains in the first information updated based on the second information, the link management unit is configured to inquire of the first wireless signal processing unit and the second wireless signal processing unit whether there is data that has not been transmitted in the multi-link and cause the receiving station to transmit the data that has not been received by the receiving station, excluding a sequence number of the data that has not been transmitted, confirmed by the inquiry.
4 . The transmitting station according to claim 1 , wherein
the link management unit periodically transmits a request for transmitting information indicating the sequence number of the data which has been received by the receiving station to the receiving station.
5 . A receiving station comprising:
a first wireless signal processing unit configured to transmit a wireless signal by using a first channel;
a second wireless signal processing unit configured to transmit a wireless signal by using a second channel different from the first channel; and
a link management unit configured to establish multi-link with a transmitting station by using the first wireless signal processing unit and the second wireless signal processing unit, manage communication in which the multi-link are used, and store first information indicating a sequence number of data which has been received,
wherein, when data is received from the transmitting station via the first wireless signal processing unit or the second wireless signal processing unit, the link management unit is configured to set a bit corresponding to a sequence number corresponding to the data which has been received, in the first information as a received bit.
6 . The receiving station according to claim 5 ,
wherein the link management unit includes a buffer capable of storing an input data unit,
the first wireless signal processing unit is configured to input a data unit in which no error has been detected among a received first data unit group to the buffer,
the second wireless signal processing unit is configured to input a data unit in which no error has been detected among a received second data unit group to the buffer, and
the link management unit is configured to output a plurality of data units for which an order of sequence numbers is arranged to an upper layer in response to the arrangement of the order of the sequence numbers in the plurality of data units stored in the buffer.
7 . The receiving station according to claim 6 , wherein
the link management unit is configured to discard the input data unit when data with a sequence number assigned to the data unit input from the first wireless signal processing unit or the second wireless signal processing unit is already stored in the buffer.
8 . The receiving station according to claim 7 , wherein
when a request for transmitting a reception status of data is received from the transmitting station via the first wireless signal processing unit or the second wireless signal processing unit, the link management unit is configured to cause the transmitting station to transmit a wireless frame including the first information by using the first wireless signal processing unit or the second wireless signal processing unit.