Wireless communication device and wireless communication method

A wireless communication method performed in, a wireless communication device which communicates with first terminals compliant with a first standard, second terminals compliant with a second standard and third terminals compliant with a third standard within a communication group formed by the wireless communication device, the method comprising:

• transmitting a first frame that is a MAC (Medium Access Control) frame to the first terminals, the second terminals and the third terminals, wherein
• the first frame is a frame for notification of operation information of the communication group and the first frame includes a first field, and at least one of a second field or a third field,
• the first field is configured to include a first identifier of the first field and first information related to a first bandwidth used by the first terminals,
• the second field is configured to include a second identifier of the second field and second information used in combination with the first information, a combination of the first information and the second information designates a second bandwidth used by the second terminals if the second field is present, and the second bandwidth is designated by the first field otherwise, and
• the third field is configured to include a third identifier of the third field and third information used in combination with the first information, a combination of the first information and the third information designates a third bandwidth used by the third terminals if the third field is present, and the third bandwidth is designated by a combination of the first information and the second information otherwise,
• interpretation of the first field can be performed by the first terminals, the second terminals and the third terminals based on identification of the first identifier in the first field identifiable by the first terminals, the second terminals, and the third terminals,
• interpretation of the second field is limited to the second terminals and the third terminals based on identification of the second identifier in the second field identifiable only by the second terminals and the third terminals, and
• interpretation of the third field is limited to the third terminals based on identification of the third identifier in the third field identifiable only by the third terminals.

A wireless communication device which communicates with first terminals compliant with a first standard, second terminals compliant with a second standard and third terminals compliant with a third standard within a communication group formed by the wireless communication device, comprising:

• transmitting circuitry configured to transmit a first frame that is a MAC (Medium Access Control) frame to the first terminals, the second terminals and the third terminals, wherein
• the first frame is a frame for notification of operation information of the communication group and the first frame includes a first field, and at least one of a second field or a third field,
• a first bandwidth that can be used by the first terminals is designated by the first field,
• a second bandwidth that can be used by the second terminals is designated by a combination of the first field and the second field if the second field is present, and designated by the first field otherwise,
• a third bandwidth that can be used by the third terminals is designated by a combination of the first field and the third field if the third field is present, and designated by a combination of the first field and the second field otherwise;
• and
• controlling circuitry configured to control the transmitting circuitry, wherein interpretation of the first field can be performed by the first terminals, the second terminals and the third terminals based on a first identifier accompanied with the first field identifiable by the first terminals, the second terminals, and the third terminals,
• interpretation of the second field is limited to the second terminals and the third terminals based on identification of a second identifier accompanied with the second field,
• interpretation of the third field is limited to the third terminals based on identification of a third identified accompanied with the third field,
• the transmitting circuitry is configured to
• transmit a second frame to at least one of the first terminals or the second terminals via at least one first channel which is included in the first bandwidth or the second bandwidth after the first bandwidth or the second bandwidth is designated to the at least one of the first terminals or the second terminals and
• transmit a third frame to at least one of the third terminals via at least one second channel which is included in the third bandwidth after the third bandwidth is designated to the at least one of the third terminals,
• the second frame and the third frame are transmitted in a frequency multiplexing, and
• the at least one second channel is different from the at least one first channel.