Abstract: An eNB 100-1 that performs radio communication by using the adaptive array control in the TD-LTE system: receives SRS utilized in the adaptive array control from a plurality of UEs 200; and performs an assignment for each subject downlink RBG, out of a plurality of downlink RBGs. The eNB assigns the subject downlink RBG to a UE 200 that transmitted a specific SRS that is SRS having the highest match rate in a frequency band with the subject downlink RBG, out of a plurality of SRSs received recently before the subject downlink RBG.

Abstract: An eNB assigns, to a UE, a pair of a PDSCH resource and a PUSCH resource that overlaps, in frequency band, with the PDSCH resource; and derives antenna weight that should be applied to the PDSCH resource, on the basis of a DMRS transmitted from the UE by using the PUSCH resource. When the assignment of the PUSCH is changed to another UE, the eNB derives the antenna weight, on the basis of a past uplink reference signal transmitted from the UE in a past time zone earlier than the PUSCH resource and in a frequency band overlapping with the frequency band of the PDSCH resource.

Abstract: In a mobile communication system performing the space division multiplex, the wireless resources are saved as much as possible and the reception powers of communication signals, which are received by a base station apparatus from mobile station apparatuses, are evened. A mobile communication system wherein each of mobile station apparatuses (10) includes a maximum power transmission information transmitting part (13) that transmits, to a base station apparatus (20), maximum power transmission information indicating that a communication signal is transmitted at the maximum transmission power of that mobile station apparatus (10), while the base station apparatus (20) includes a reception power acquiring part (22) that acquires the reception powers of the communication signals transmitted from the respective mobile station apparatuses (10), a maximum power transmission.

Abstract: In a mobile communication system performing the space division multiplex, the wireless resources are saved as much as possible and the reception powers of communication signals, which are received by a base station apparatus from mobile station apparatuses, are evened. A mobile communication system wherein each of mobile station apparatuses (10) includes a maximum power transmission information transmitting part (13) that transmits, to a base station apparatus (20), maximum power transmission information indicating that a communication signal is transmitted at the maximum transmission power of that mobile station apparatus (10), while the base station apparatus (20) includes a reception power acquiring part (22) that acquires the reception powers of the communication signals transmitted from the respective mobile station apparatuses (10), a maximum power transmission.