A method for scheduling a pilot signal, a control node and a wireless device are proposed. The control node manages an i-th cell among N cells of a network cluster. The method includes: dividing a training time into at least (N) time slots; scheduling a wireless device of the i-th cell to transmit a first pilot signal at a j-th time slot and a (j+1)-th time slot, or scheduling the wireless device of the i-th cell to transmit a second pilot signal at the j-th time slot and the (j+1)-th time slot; scheduling the wireless device to alternately transmit the first pilot signal and the second pilot signal at residual time slots other than the j-th time slot and the (j+1)-th time slot, wherein the first pilot signal and the second pilot signal have opposite signs.