BASE STATION AND COMMUNICATION CONTROL METHOD

摘要

A base station according to a first aspect is configured to transmit a radio signal to a user terminal in an own cell by using a plurality of transmission antennas. The base station comprises: a controller configured to notify the user terminal of a multi-antenna transmission mode to be applied to a transmission of the radio signal; and a transmitter configured to transmit the radio signal by using the plurality of transmission antennas by the multi-antenna transmission mode notified to the user terminal. The controller reduces a number of transmission antennas to be used for the transmission of the radio signal so as to reduce power consumption of the base station. The controller maintains the multi-antenna transmission mode notified to the user terminal without changing the multi-antenna transmission mode, even when reducing the number of transmission antennas to be used for the transmission of the radio signal.

主权项

1. A base station configured to transmit a radio signal to a user terminal in an own cell, the base station comprising:
a controller configured to notify the user terminal of a multi-antenna transmission mode to be applied to a transmission of the radio signal; and a transmitter configured to transmit the radio signal by using a plurality of transmission antennas by the multi-antenna transmission mode to the user, wherein the controller reduces a number of transmission antennas to be used for the transmission of the radio signal after notifying the user terminal of the multi-antenna transmission mode, and the controller maintains the multi-antenna transmission mode, even when reducing the number of transmission antennas to be used for the transmission of the radio signal.