Patent ID: 8542639

Claim:
A method for transmitting a signal in a communication system which supports a time division duplexing (TDD) mode and supports two or more different communication schemes, the method comprising: constructing the signal in a unit of a frame and transmitting the signal, wherein the two or more communication schemes include a communication scheme of an IEEE 802.16e system, wherein the frame includes a first region for the communication scheme of the IEEE 802.16e system and a second region for the communication scheme except for the IEEE 802.16e system, wherein the second region consists of a plurality of subframes, each of the plurality of subframes having a length equal to a multiple of 3 orthogonal frequency division multiplexing (OFDM) symbols, wherein the plurality of subframes includes at least two groups, wherein a first group of the at least two groups includes a subframe having length of 6 OFDM symbols, and wherein a second group of the at least two groups includes a subframe having length of 9 OFDM symbols.