Electronic apparatus

An electronic apparatus comprising:

• a transmitter configured to transmit a first physical frame including an address specifying a first wireless apparatus as a destination;
• and
• a receiver configured to receive, from the first wireless apparatus and a second wireless apparatus different from the first wireless apparatus which is a destination of the first physical frame, a response frame including information regarding the first physical frame if the first physical frame is successfully received by the first wireless apparatus,
• wherein the receiver determines that the response frame has been received if a first wireless signal is detected after a lapse of a first period from an end of the first physical frame,
• wherein the first physical frame includes a first request to send (RTS) frame for reserving a communication period,
• wherein the response frame is a first clear to send (CTS) frame for reserving the communication period, the first CTS frame including information regarding the first RTS frame, and
• wherein the transmitter is further configured to transmit, if the receiver successfully receives the first CTS frame from the first wireless apparatus and fails to receives a second CTS frame from the second wireless apparatus, a transmission data frame during the communication period without transmitting the first RTS frame again, the second CTS frame including information regarding the first RTS frame from the second wireless apparatus.

A communication method applied to an electronic apparatus comprising:

• receiving, from a first wireless apparatus, a first physical frame including an address specifying both (1) the electronic apparatus and (2) a second wireless apparatus different from the electronic apparatus as destinations;
• and
• transmitting, to the first wireless apparatus, a first response frame in response to reception of the first physical frame, if the first physical frame is successfully received,
• wherein a transmission period of the first response frame at least partially overlaps with a transmission period of a second response frame transmitted by the second wireless apparatus in response to reception of the first physical frame,
• wherein the transmitting includes generating a physical header of the first response frame same as a physical header of the second response frame and transmitting the first response frame based on a PHY parameter same as a PHY parameter of the second wireless apparatus,
• wherein the first physical frame includes a first request to send (RTS) frame for reserving a communication period,
• wherein the first response frame is a first clear to send (CTS) frame for reserving the communication period, the first CTS frame including information regarding the first RTS frame, and
• wherein the communication method further comprises receiving, if the first CTS frame is successfully received by the first wireless apparatus and a second CTS frame fails to be received by the first wireless apparatus, a transmission data frame during the communication period without receiving the first RTS frame again, the second CTS frame including information regarding the first RTS frame from the second wireless apparatus.

A communication method comprising:

• transmitting a first physical frame including an address specifying a first wireless apparatus as a destination;
• receiving, from the first wireless apparatus and a second wireless apparatus different from the first wireless apparatus which is a destination of the first physical frame, a response frame including information regarding the first physical frame if the first physical frame is successfully received by the first wireless apparatus;
• detecting a first wireless signal;
• and
• determining that the response frame has been received if the first wireless signal is detected after a lapse of a first period from an end of the first physical frame,
• wherein the first physical frame includes a first request to send (RTS) frame for reserving a communication period,
• wherein the response frame is a first clear to send (CTS) frame for reserving the communication period, the first CTS frame including information regarding the first RTS frame, and
• wherein the communication method further comprises transmitting, if the first CTS frame from the first wireless apparatus is successfully received and a second CTS frame from the second wireless apparatus is not received, a transmission data frame during the communication period without transmitting the first RTS frame again, the second CTS frame including information regarding the first RTS frame from the second wireless apparatus.