FIELD: electricity.
SUBSTANCE: vectoring control entity receives the power control factor 
for i-th transmission side at the k-th subcarrier, where i-th transmission side is one transceiver of M transceivers located at the side of central station, 
, and K indicates the number of subcarriers; and sends the power control factor to the i-th transmission side so that, if it is determined based on the power control factor , that power control factor is smaller than power amplification factor 
of the current transmission signal of i-th transmission side at k-th subcarrier, i-th transmission side modifies the power amplification factor of the current transmission signal so that modified power amplification factor 
is less or equal to the power control factor .
EFFECT: possibility to address the problem existing in the power control method at the prior technology level, which consists in the fact that the control is complicated and the signal transmission performance of the whole communication line is reduced.
19 cl, 11 dwg
