Patent ID: 8223857

Claim:
A method of communicating by a mobile communication terminal in communication with a base station, comprising: transceiving data in a unit of a frame in which five (5) subframes for downlink which are followed by three (3) subframes for uplink are included, the frame including a plurality of first type subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and a plurality of second type subframes each having a second number of OFDMA symbols different from the first number, wherein one (1) first type subframe for downlink is followed by three (3) second type subframes for downlink, and two (2) second type subframes for uplink are followed by one (1) first type subframe for uplink, which is a last subframe of the frame, and wherein an idle symbol is included between the five (5) subframes for downlink and the three (3) subframes for uplink.