Base station apparatus, terminal apparatus, and communication method
A terminal apparatus includes a receiver configured to receive a first radio resource control (RRC) parameter for configuring one of a first repetition transmission type and a second repetition transmission type, and a transmitter configured to transmit, on a PUSCH, a transport block scheduled by a DCI format. The transmitter performs, by applying the repetition transmission type configured for the first RRC parameter, a repetition transmission of the transport block.
1. A terminal apparatus comprising:
reception circuitry configured to receive a radio resource control (RRC) message including a first RRC parameter for notifying which one of a first repetition transmission type and a second repetition transmission type is to be configured; and
transmission circuitry configured to transmit, on a Physical Uplink Shared CHannel (PUSCH), a transport block scheduled by a downlink control information (DCI) format, wherein
the transmission circuitry performs, by applying the first repetition transmission type in a case that the first repetition transmission type is configured by the first RRC parameter, a repetition transmission of the transport block based on a first number of repetition transmissions,
the transmission circuitry performs, by applying the second repetition transmission type in a case that the second repetition transmission type is configured by the first RRC parameter and a second RRC parameter for indicating the first number of repetition transmissions and a second number of repetition transmissions is included in the RRC message, the repetition transmission of the transport block based on the second number of repetition transmissions,
for the first repetition transmission type, the repetition transmission of the transport block is performed only once within one slot,
for the second repetition transmission type, the repetition transmission of the transport block is performed one or more times within one slot,
the first number of repetition transmissions is indicated by the second RRC parameter in a case that the second RRC parameter is included in the RRC message,
the first number of repetition transmissions is indicated by a third RRC parameter for indicating the first number of repetition transmissions in a case that the second RRC parameter is not included in the RRC message and the third RRC parameter is included in the RRC message, and
the second number of repetition transmissions is indicated by the second RRC parameter included in the RRC message.
2. The terminal apparatus according to claim 1 , wherein
the first number of repetition transmissions is 1 in a case that the second RRC parameter and the third RRC parameter are not included in the RRC message.
3. A base station apparatus comprising:
transmission circuitry configured to transmit a radio resource control (RRC) message including a first RRC parameter for notifying which one of a first repetition transmission type and a second repetition transmission type is to be configured; and
reception circuitry configured to receive, on a Physical Uplink Shared CHannel (PUSCH), a transport block scheduled by a downlink control information (DCI) format, wherein
the reception circuitry receives, by applying the first repetition transmission type in a case that the first repetition transmission type is configured by the first RRC parameter, a repetition transmission of the transport block based on a first number of repetition transmissions,
the reception circuitry performs, by applying the second repetition transmission type in a case that the second repetition transmission type is configured by the first RRC parameter and a second RRC parameter for indicating the first number of repetition transmissions and a second number of repetition transmissions is included in the RRC message, the repetition transmission of the transport block based on the second number of repetition transmissions,
for the first repetition transmission type, the repetition transmission of the transport block is performed only once within one slot,
for the second repetition transmission type, the repetition transmission of the transport block is performed one or more times within one slot,
the first number of repetition transmissions is indicated by the second RRC parameter in a case that the second RRC parameter is included in the RRC message,
the first number of repetition transmissions is indicated by a third RRC parameter for determining the first number of repetition transmissions in a case that the second RRC parameter is not included in the RRC message and the third RRC parameter is included in the RRC message, and
the second number of repetition transmissions is indicated by the second RRC parameter included in the RRC message.
4. The base station apparatus according to claim 3 , wherein
the first number of repetition transmissions is 1 in a case that the second RRC parameter and the third RRC parameter are not included in the RRC message.
5. A communication method for a terminal apparatus, the communication method comprising:
receiving a radio resource control (RRC) message including a first RRC parameter for notifying which one of a first repetition transmission type and a second repetition transmission type is to be configured;
transmitting, on a Physical Uplink Shared CHannel (PUSCH), a transport block scheduled by a downlink control information (DCI) format; and
performing, by applying the first repetition transmission type in a case that the first repetition transmission type is configured by the first RRC parameter, a repetition transmission of the transport block based on a first number of repetition transmissions,
performing, by applying the second repetition transmission type in a case that the second repetition transmission type is configured by the first RRC parameter and a second RRC parameter for indicating the first number of repetition transmissions and a second number of repetition transmissions is included in the RRC message, the repetition transmission of the transport block based on the second number of repetition transmissions,
for the first repetition transmission type, the repetition transmission of the transport block is performed only once within one slot,
for the second repetition transmission type, the repetition transmission of the transport block is performed one or more times within one slot,
the first number of repetition transmissions is indicated by the second RRC parameter in a case that the second RRC parameter is included in the RRC message,
the first number of repetition transmissions is indicated by a third RRC parameter for indicating the first number of repetition transmissions in a case that the second RRC parameter is not included in the RRC message and the third RRC parameter is included in the RRC message, and
the second number of repetition transmissions is indicated by the second RRC parameter included in the RRC message.