User terminal and radio communication method
In order to control CSI reporting properly when communication is carried out by applying different configurations than existing LTE systems, a user terminal has a receiving section that receives configuration information for channel state information reporting, and a control section that controls a start of periodic transmission of the channel state information reporting based on the configuration information in response to receipt of a command for activation of the channel state information reporting, and that controls that, when a condition is fulfilled during a period from the start to deactivation of the channel state information reporting, the channel state information reporting is no longer transmitted.
1. A terminal comprising:
a receiver that receives an indication activating a semi-persistent channel state information (CSI) reporting by one of a first downlink control information (DCI) and a medium access control-control element (MAC CE); and
a processor that performs the activated semi-persistent CSI reporting based on the indication,
wherein the processor determines whether or not to perform the activated semi-persistent CSI reporting, based on at least one of a second DCI indicating a slot format and a maximum coding rate.
2. The terminal according to claim 1 , wherein when the second DCI indicates a period that is not uplink, the processor does not perform the activated semi-persistent CSI reporting in the period.
3. The terminal according to claim 1 , wherein the processor determines, based on whether or not a coding rate of an uplink control information including the semi-persistent CSI reporting is higher than the maximum coding rate, whether or not to perform the activated semi-persistent CSI reporting.
4. The terminal according to claim 2 , wherein the processor determines, based on whether or not a coding rate of an uplink control information including the semi-persistent CSI reporting is higher than the maximum coding rate, whether or not to perform the activated semi-persistent CSI reporting.
5. A radio communication method for a terminal comprising:
receiving an indication activating a semi-persistent channel state information (CSI) reporting by one of a first downlink control information (DCI) and a medium access control-control element (MAC CE); and
performing the activated semi-persistent CSI reporting based on the indication,
wherein the terminal determines whether or not to perform the activated semi-persistent CSI reporting, based on at least one of a second DCI indicating a slot format and a maximum coding rate.
6. A base station comprising:
a transmitter that transmits an indication activating a semi-persistent channel state information (CSI) reporting by one of a first downlink control information (DCI) and a medium access control-control element (MAC CE); and
a processor that acquires the activated semi-persistent CSI reporting based on the indication,
wherein it is determined whether or not to perform the activated semi-persistent CSI reporting, based on at least one of a second DCI indicating a slot format and a maximum coding rate.
7. A system comprising a terminal and a base station; wherein
the terminal comprises:
a receiver that receives an indication activating a semi-persistent channel state information (CSI) reporting by one of a first downlink control information (DCI) and a medium access control-control element (MAC CE); and
a processor that performs the activated semi-persistent CSI reporting based on the indication,
wherein the processor determines whether or not to perform the activated semi-persistent CSI reporting, based on at least one of a second DCI indicating a slot format and a maximum coding rate,
the base station comprises:
a transmitter that transmits the indication; and
a processor that acquires the activated semi-persistent CSI reporting based on the indication.