A mobile station, comprising: a feedback unit configured to transmit to at least one of the serving base station and the base station of the adjacent cell a first channel information based on a first reference signal and a second channel information based on a second reference signal, the first channel information being associated with a first channel between the serving base station and the mobile station, the first reference signal being transmitted from the serving base station, the second channel information being associated with a second channel between the base station of an adjacent cell and the mobile station, and the second reference signal being transmitted from the base station of the adjacent cell, wherein: the first channel information comprises any one of a Channel State Information and a Precoding Matrix Index of the first channel; and the second channel information comprises any one of a CSI and a PMI of the second channel, CHARACTERIZED BY a selection unit configured to select the first channel information and the second channel information as any one of the corresponding CSI and the corresponding PMI, wherein the selection unit is further configured to select the CSI of the first channel as the first channel information, and select the PMI of the second channel as the second channel information, in response to a condition from a group of conditions at least comprising: a backhaul delay being equal to or greater than a predetermined value; a backhaul overhead being equal to or greater than a predetermined value; a Signal to Noise Ratio being equal to or less than a predetermined value. a feedback unit configured to transmit to at least one of the serving base station and the base station of the adjacent cell a first channel information based on a first reference signal and a second channel information based on a second reference signal, the first channel information being associated with a first channel between the serving base station and the mobile station, the first reference signal being transmitted from the serving base station, the second channel information being associated with a second channel between the base station of an adjacent cell and the mobile station, and the second reference signal being transmitted from the base station of the adjacent cell, wherein: the first channel information comprises any one of a Channel State Information and a Precoding Matrix Index of the first channel; and the second channel information comprises any one of a CSI and a PMI of the second channel, the first channel information comprises any one of a Channel State Information and a Precoding Matrix Index of the first channel; and the second channel information comprises any one of a CSI and a PMI of the second channel, CHARACTERIZED BY a selection unit configured to select the first channel information and the second channel information as any one of the corresponding CSI and the corresponding PMI, wherein the selection unit is further configured to select the CSI of the first channel as the first channel information, and select the PMI of the second channel as the second channel information, in response to a condition from a group of conditions at least comprising: a backhaul delay being equal to or greater than a predetermined value; a backhaul overhead being equal to or greater than a predetermined value; a Signal to Noise Ratio being equal to or less than a predetermined value.