Base station apparatus, terminal apparatus, and communication method using downlink control information format and higher layer parameter
The present invention includes: a receiver configured to receive a DCI format used for scheduling a PDSCH, and a higher layer parameter including a parameter subframeAssignment-r15; and a transmitter configured to transmit a HARQ-ACK corresponding to the PDSCH, wherein in a case that a duplex mode of a primary cell is an FDD, whether the number of bits in a HARQ process number field in the DCI format is three bits or four bits is determined, based on whether or not an EN-DC is configured, whether or not the higher layer parameter including the parameter subframeAssignment-r15 is configured, and whether or not the DCI format is mapped to a USS given by a C-RNTI.
1. A terminal apparatus comprising:
a receiver configured to receive a DCI (Downlink Control Information) format being used for scheduling of a PDSCH (Physical Downlink Shared CHannel), and a higher layer parameter including a parameter subframeAssignment-r15, the higher layer parameter being included in an RRC (Radio Resource Control) connection reconfiguration message; and
a transmitter configured to transmit a HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to the PDSCH,
wherein, in a case that a duplex mode of a primary cell is FDD (Frequency Division Duplex), whether a number of bits of a HARQ process number field in the DCI format is 3 bits or 4 bits is determined based on whether EN-DC (Evolved universal terrestrial radio access network New radio Dual Connectivity) is configured, whether the higher layer parameter including the parameter subframeAssignment-r15 is configured, and whether the DCI format is mapped to a USS (UE (user equipment) specific search space) given by a C-RNTI (cell radio network temporary identifier).
2. The terminal apparatus according to claim 1 , wherein
the number of bits of the HARQ process number field in the DCI format is 4 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to the USS given by the C-RNTI.
3. The terminal apparatus according to claim 1 , wherein
the number of bits of the HARQ process number field in the DCI format is 3 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to a CSS (Common Search Space).
4. A base station apparatus comprising:
a transmitter configured to transmit a DCI (Downlink Control Information) format being used for scheduling of a PDSCH (Physical Downlink Shared CHannel), and a higher layer parameter including a parameter subframeAssignment-r15, the higher layer parameter being included in an RRC (Radio Resource Control) connection reconfiguration message; and
a receiver configured to receive a HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to the PDSCH,
wherein, in a case that a duplex mode of a primary cell is FDD (Frequency Division Duplex), whether a number of bits of a HARQ process number field in the DCI format is 3 bits or 4 bits is determined based on whether EN-DC (Evolved universal terrestrial radio access network New radio Dual Connectivity) is configured, whether the higher layer parameter including the parameter subframeAssignment-r15 is configured, and whether the DCI format is mapped to a USS (UE (user equipment) specific search space) given by a C-RNTI (cell radio network temporary identifier).
5. The base station apparatus according to claim 4 , wherein
the number of bits of the HARQ process number field in the DCI format is 4 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to the USS given by the C-RNTI.
6. The base station apparatus according to claim 4 , wherein
the number of bits of the HARQ process number field in the DCI format is 3 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to a CSS (Common Search Space).
7. A communication method of a terminal apparatus comprising:
receiving a higher layer parameter including a parameter subframeAssignment-r15, the higher layer parameter being included in an RRC (Radio Resource Control) connection reconfiguration message;
receiving a DCI (Downlink Control Information) format being used for scheduling of a PDSCH (Physical Downlink Shared CHannel); and
transmitting a HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to the PDSCH,
wherein, in a case that a duplex mode of a primary cell is FDD (Frequency Division Duplex), whether a number of bits of a HARQ process number field in the DCI format is 3 bits or 4 bits is determined based on whether EN-DC (Evolved universal terrestrial radio access network New radio Dual Connectivity) is configured, whether the higher layer parameter including the parameter subframeAssignment-r15 is configured, and whether the DCI format is mapped to a USS (UE (user equipment) specific search space) given by a C-RNTI (cell radio network temporary identifier).
8. The communication method according to claim 7 , wherein
the number of bits of the HARQ process number field in the DCI format is 4 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to the USS given by the C-RNTI.
9. The communication method according to claim 7 , wherein
the number of bits of the HARQ process number field in the DCI format is 3 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to a CSS (Common Search Space).
10. A communication method of a base station apparatus comprising:
transmitting a higher layer parameter including a parameter subframeAssignment-r15, the higher layer parameter being included in an RRC (Radio Resource Control) connection reconfiguration message;
transmitting a DCI (Downlink Control Information) format being used for scheduling of a PDSCH (Physical Downlink Shared CHannel); and
receiving a HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) corresponding to the PDSCH,
wherein, in a case that a duplex mode of a primary cell is FDD (Frequency Division Duplex), whether a number of bits of a HARQ process number field in the DCI format is 3 bits or 4 bits is determined based on whether EN-DC (Evolved universal terrestrial radio access network New radio Dual Connectivity) is configured, whether the higher layer parameter including the parameter subframeAssignment-r15 is configured, and whether the DCI format is mapped to a USS (UE (user equipment) specific search space) given by a C-RNTI (cell radio network temporary identifier).
11. The communication method according to claim 10 , wherein
the number of bits of the HARQ process number field in the DCI format is 4 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to the USS given by the C-RNTI.
12. The communication method according to claim 10 , wherein
the number of bits of the HARQ process number field in the DCI format is 3 bits, in a case that the duplex mode of the primary cell is FDD, the EN-DC is configured, the higher layer parameter including the parameter subframeAssignment-r15 is configured, and the DCI format is mapped to a CSS (Common Search Space).