Patent ID: 8837518

Claim:
A method of communicating by a mobile communication terminal using a frame comprising a plurality of downlink subframes and a plurality of uplink subframes, the method comprising: receiving the plurality of downlink subframes of the frame from a network, types of the plurality of downlink subframes including a first downlink type and a second downlink type, the plurality of downlink subframes of the frame including one (1) first downlink type subframe which is followed by three (3) second downlink type subframes; and transmitting the plurality of uplink subframes of the frame to the network, types of the plurality of uplink subframes including a first uplink type and a second uplink type, the plurality of uplink subframes of the frame including two (2) second uplink type subframes which are followed by a last subframe of the frame, a type of the last subframe of the frame being the first uplink type, wherein each subframe of the first uplink type and the first downlink type includes a first number of orthogonal frequency division multiple access (OFDMA) symbols and each subframe of the second uplink type and the second downlink type includes a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number, and wherein the plurality of downlink subframes precedes the plurality of uplink subframes in each frame, and a last OFDMA symbol of a last downlink subframe in each frame is an idle symbol.