APERIODIC CHANNEL STATE INFORMATION COMMUNICATION METHOD, WIRELESS BASE STATION DEVICE, AND USER TERMINAL

摘要

In the case that a user terminal communicates wirelessly using multiple serving cells of different component carriers, aperiodic channel state information of the serving cell among the multiple serving cells that is required by the network side is flexibly communicated. A wireless base station device transmits an uplink scheduling grant to the user terminal via a downlink control channel, the uplink scheduling grant containing an identification field for identifying an uplink serving cell to which an uplink shared channel is assigned, and a request field for requesting communication of the aperiodic channel state information from the user terminal. The user terminal communicates the aperiodic channel state information of a downlink serving cell specified by combining the identification field and the request field to the wireless base station device via the uplink shared channel.