Patent ID: 8605673

Claim:
A method for allocating downlink power, comprising: receiving measurement parameters which are of a reference signal and are reported by a user equipment (UE) and parameters which are of each aggregate waveband and are sent by a secondary evolved NodeB (eNB); sending, according to the measurement parameters which are of the reference signal and the parameters which are of each aggregate waveband, a transmit power of the secondary eNB on a waveband used by the UE to the secondary eNB; and sending to the UE a first ratio of an energy of Orthogonal Frequency Division Multiplex (OFDM) symbols excluding the reference signal on each resource block on each downlink shared channel to an energy allocated to each resource block on the reference signal, and a second ratio of an energy of OFDM symbols comprising the reference signal on each resource block on each downlink shared channel to an energy of OFDM symbols excluding the reference signal on each resource block on each downlink shared channel; wherein the sending the transmit power of the secondary eNB on the waveband used by the UE to the secondary eNB comprises: calculating, based on a channel gain and interference received by the UE on the waveband used by the UE, a first transmit power of the secondary eNB on the waveband used by the UE, and calculating, based on the channel gain, a second transmit power of the secondary eNB on the waveband used by the UE; if a normalized channel capacity obtained based on the channel gain and the interference received by the UE on the waveband used by the UE is larger than a normalized channel capacity obtained based on the channel gain, sending the first transmit power to the secondary eNB through an X2 interface message; and if a normalized channel capacity obtained based on the channel gain and the interference received by the UE on the waveband used by the UE is not larger than a normalized channel capacity obtained based on the channel gain, sending the second transmit power to the secondary eNB through the X2 interface message.