Terminal, radio communication method, base station, and system

A radio communication method for a terminal, comprising:

• receiving, via higher layer signaling, configuration information which indicates non-zero power (NZP) resources to which transmit power for channel state information reference signal (CSI-RS) is distributed and zero power (ZP) resources to which transmit power for CSI-RS is not distributed;
• receiving a downlink control information including an identification information for specifying a channel measurement resource being one from among the NZP resources, a NZP interference measurement resource being one other than the channel measurement resources from among the NZP resources, and a ZP interference measurement resource being one from among of the ZP resources;
• specifying, based on the configuration information and the downlink control information, the channel measurement resource, the NZP interference measurement resource, and the ZP interference measurement resource;
• measuring signal power using the first channel measurement resource;
• and
• measuring total power of interference and noise using the NZP interference measurement resource and the ZP interference measurement resource.

A base station comprising:

• a transmitter that transmits, via higher layer signaling, configuration information which indicates non-zero power (NZP) resources to which transmit power for channel state information reference signal (CSI-RS) is distributed and indicates zero power (ZP) resources to which transmit power for CSI-RS is not distributed, and transmits a downlink control information including an identification information for specifying a channel measurement resource being one from among the NZP resources, a NZP interference measurement resource being one other than the channel measurement resources from among the NZP resources, and a ZP interference measurement resource being one from among of the ZP resources;
• and
• a processor that controls:
• specifying, based on the configuration information and the downlink control information, the channel measurement resource, the NZP interference measurement resource, and the ZP interference measurement resource;
• measuring signal power using the channel measurement resource;
• and
• measuring total power of interference and noise using the NZP interference measurement resource and the ZP interference measurement resource.

A system comprising:

• a terminal that comprises:
• a receiver that receives, via higher layer signaling, configuration information which indicates non-zero power (NZP) resources to which transmit power for channel state information reference signal (CSI-RS) is distributed and indicates zero power (ZP) resources to which transmit power for CSI-RS is not distributed, and receives a downlink control information including an identification information for specifying a channel measurement resource being one from among the NZP resources, a NZP interference measurement resource being one other than the channel measurement resources from among the NZP resources, and a ZP interference measurement resource being one from among of the ZP resources;
• and
• a processor that:
• specifies, based on the configuration information and the downlink control information, the channel measurement resource, the NZP interference measurement resource, and the ZP interference measurement resource,
• measures signal power using the channel measurement resource, and
• measures total power of interference and noise using the NZP interference measurement resource and the ZP interference measurement resource;
• and
• a base station that transmits the configuration information and transmits the downlink control information.