Patent ID: 7894398

Claim:
A method of transmitting an uplink channel signal in a radio access system, the method comprising: transmitting, by a user equipment (UE) in a discontinuous transmission (DTX) mode to an e-Node B (eNB), a first channel signal including control information for detecting a second channel signal in a predetermined radio frame comprising a compressed mode transmission gap (CM gap); and transmitting, by the UE to the eNB, the second channel signal through a second channel after the UE starts transmitting the first channel signal in the predetermined radio frame, wherein a preamble of the first channel signal is transmitted two slots prior to the transmission of the second channel signal and a postamble of the first channel signal is transmitted one slot after completion of the transmission of the second channel signal, and wherein if a part of the preamble or the postamble of the first channel signal is overlapped on the CM gap, the first channel signal is transmitted in all slots in the predetermined radio frame excluding the part of the preamble or the postamble of the first channel signal.