Method for mapping control channels

A control channel mapping method for improving the performance of a control channel is provided to reduce the resources and interference between adjacent cells and improve the performance of the control channel. A control channel mapping start time point of each cell is computed according to the group number of control channels allocated at a cell. The control channel mapping start time point of each cell is set by using maximum value among the group number of the control channel allocated to each cell. The repetition of the control channel is mapped with the interval predetermining for the diversity gain. The control channel of the multiple groups is transmitted inside the cell.