Patent ID: 11968141
Assignee: SHARP KABUSHIKI KAISHA
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A base station apparatus configured to communicate with a terminal apparatus, the base station apparatus comprising:
transmission circuitry configured to transmit a non-zero power (NZP) channel state information reference signal (CSI-RS) and radio resource control (RRC) signaling; and
reception circuitry configured to receive channel state information (C SI) corresponding to the NZP CSI-RS, wherein
the CSI includes at least a rank indicator (RI) and a precoding matrix indicator (PMI) that includes a plurality of indicators, the plurality of indicators indicating a plurality of vectors,
a quantity of vectors of the plurality of vectors is determined based on a first value or a second value, the first value and the second value being indicated by the RRC signaling,
the first value indicated by the RRC signaling in a case of a value of the RI being more than 2,
the second value indicated by the RRC signaling in a case of a value of the RI being 2 or less, and
the first value is equal to or smaller than the second value.