Patent ID: 7646747

Claim:
A channel structuring method performed by a base station of a communication system configuring channels wherein transmission signals are modulated by orthogonal frequency division multiplexing comprising n sub-carriers and multiplexed by time division multiplexing to configure downlink channels, said method comprising: providing, at the base station, time frames by segmenting a communication channel of said n sub-carriers at every predetermined interval; selecting, at the base station, from the n sub-carriers, a predetermined number of sub-carriers for insertion of accompanying control channel signals and common pilot signals; and inserting, at the base station, an accompanying control channel signal and a common pilot signal into the time frames by time division multiplexing with respect to the selected sub-carriers while ensuring that at least one of the selected sub-carriers selected from the n sub-carriers used for the frequency division multiplexing has both an accompanying control channel signal and a common pilot signal inserted therein.