MOBILE COMMUNICATION SYSTEM, USER TERMINAL, AND COMMUNICATION CONTROL METHOD

摘要

UE 100-1 transmits null-steering control information for directing a null to the UE 100-1 in a transmission from eNB 200-2 to UE 100-2, and first channel quality information on a modulation and coding scheme recommended when the null-steering control information is adopted in the eNB 200-2, to eNB 200-1. The UE 100-1 controls to transmit, instead of transmitting the first channel quality information or in addition to transmitting the first channel quality information, second channel quality information on a modulation and coding scheme recommended when the null-steering control information is not adopted in the eNB 200-2, to the eNB 200-1.

主权项

1. A mobile communication system transmitting by downlink multi-antenna transmission from a radio access network to a user terminal, wherein
the user terminal comprises: a transmitter configured to transmit null-steering control information for directing a null to the user terminal in a transmission from the radio access network to another user terminal, and first channel quality information on a modulation and coding scheme recommended when the null-steering control information is adopted in the radio access network, to the radio access network; and a controller configured to control to transmit, instead of transmitting the first channel quality information or in addition to transmitting the first channel quality information, second channel quality information on a modulation and coding scheme recommended when the null-steering control information is not adopted in the radio access network, to the radio access network.