Communication apparatus and communication method
The present technology relates to a communication apparatus and a communication method capable of realizing more reliable communication. Provided is a communication apparatus including a control unit that performs control to use an available frequency channel to transmit a data frame to another communication apparatus, and add, to the data frame, available channel information regarding the frequency channel available for transmitting and receiving a frame. The present technology can be applied to, for example, a wireless LAN system.
1. A communication apparatus comprising
a circuit that performs control to
use an available frequency channel to transmit a data frame to another communication apparatus, the data frame being in the form of an A-MPDU frame including MAC protocol data units (MPDUs), and
add, to the data frame, delimiters between the MPDUs, each delimiter including available channel information regarding a frequency channel available for transmitting and receiving a frame,
wherein the delimiters are sent in between the MPDUs at different time points,
in response to the A-MPDU frame being transmitted, the circuit transmits a simulcast block ACK (SACK) frame using one or more frequency channels that are available, and
wherein in response to data within the A-MPDU frame not being received by the another communication apparatus, the circuit retransmits the data using the one or more frequency channels on which the SACK frame has been sent.
2. The communication apparatus according to claim 1 ,
wherein the circuit
monitors a usage status of a frequency channel different from the frequency channel used for transmitting the data frame,
specifies an available frequency channel on a basis of monitoring results, and
includes the available channel information regarding the available frequency channel that has been specified, in the data frame.
3. The communication apparatus according to claim 1 ,
wherein the circuit controls operation of waiting for a confirmation signal used for confirmation of reception of the data frame as a signal transmitted from the another communication apparatus on the available frequency channel.
4. The communication apparatus according to claim 3 ,
wherein the confirmation signal includes specific information regarding data that needs to be retransmitted, and
the circuit
specifies the data on a basis of the specific information included in the confirmation signal, and
uses one or more frequency channels on which the confirmation signal has been received to transmit a data frame including the data that has been specified to the another communication apparatus.
5. A communication method comprising,
by a communication apparatus,
performing control to
use an available frequency channel to transmit a data frame to another communication apparatus, the data frame being in the form of an A-MPDU frame including MAC protocol data units (MPDUs), and
add, to the data frame, delimiters between the MPDUs, each delimiter including available channel information regarding a frequency channel available for transmitting and receiving a frame,
wherein the delimiters are sent in between the MPDUs at different time points, and
wherein the method further comprises:
in response to the A-MPDU frame being transmitted, the circuit transmits a simulcast block ACK (SACK) frame using one or more frequency channels that are available, and
in response to data within the A-MPDU frame not being received by the another communication apparatus, the circuit retransmits the data using the one or more frequency channels on which the SACK frame has been sent.