This invention relates to an information processing apparatus, an
information processing method, a recording medium, and a program for
transmitting an RTS frame at full power and data at low power. If it is
ascertained that data is to be transmitted, an RTS frame is transmitted
at full power. If a CTS frame enabling data transmission is not received,
a determination is made as to whether a CTS frame is received with its RA
field carrying the address of another terminal. If the latter CTS is
found to have been received, a transmission-prohibited interval is set
and counted based on a duration field in the CTS frame. If the CTS frame
enabling data transmission is found to have been received, a reception
level of the frame is measured and stored. Data is transmitted by a PDA
at lower power. An ACK frame is received. This invention applies
illustratively to PDAs.