A communication apparatus arranged to operate as an Access Point in a wireless network, the communication apparatus comprising: a communication unit adapted to: transmit a Request to Send frame to a first station and a second station, the RTS frame being addressed to a broadcast address and configured to cause the first station to transmit a first Clear to Send frame to the communication apparatus and to another Access Point which belongs to another wireless network which overlaps with the wireless network; receive contemporaneously the first CTS frame from the first station in response to the RTS frame and a second CTS frame from the second station in response to the RTS frame; transmit, in response to receiving the first CTS frame or the second CTS frame, a multiplex data frame including first data for the first station and second data for the second station; receive a first acknowledge frame from the first station in response to the multiplex data frame and a second acknowledge frame from the second station in response to the multiplex data frame; and a controller arranged to control inclusion of time information in the RTS frame, the time information related to a first data transmission sequence scheduled on the wireless network; wherein the first CTS frame and the second CTS frame include the time information related to the first data transmission sequence scheduled on the wireless network. a communication unit adapted to: transmit a Request to Send frame to a first station and a second station, the RTS frame being addressed to a broadcast address and configured to cause the first station to transmit a first Clear to Send frame to the communication apparatus and to another Access Point which belongs to another wireless network which overlaps with the wireless network; receive contemporaneously the first CTS frame from the first station in response to the RTS frame and a second CTS frame from the second station in response to the RTS frame; transmit, in response to receiving the first CTS frame or the second CTS frame, a multiplex data frame including first data for the first station and second data for the second station; receive a first acknowledge frame from the first station in response to the multiplex data frame and a second acknowledge frame from the second station in response to the multiplex data frame; and transmit a Request to Send frame to a first station and a second station, the RTS frame being addressed to a broadcast address and configured to cause the first station to transmit a first Clear to Send frame to the communication apparatus and to another Access Point which belongs to another wireless network which overlaps with the wireless network; receive contemporaneously the first CTS frame from the first station in response to the RTS frame and a second CTS frame from the second station in response to the RTS frame; transmit, in response to receiving the first CTS frame or the second CTS frame, a multiplex data frame including first data for the first station and second data for the second station; receive a first acknowledge frame from the first station in response to the multiplex data frame and a second acknowledge frame from the second station in response to the multiplex data frame; and a controller arranged to control inclusion of time information in the RTS frame, the time information related to a first data transmission sequence scheduled on the wireless network; wherein the first CTS frame and the second CTS frame include the time information related to the first data transmission sequence scheduled on the wireless network.