Terminal, communication method, base station, and system for configuration downlink control channel candidates linked with one another
A terminal according to one aspect of the present disclosure includes: a receiving section that receives a configuration for two physical downlink control channel (PDCCH) candidates linked with each other; and a control section that uses, when downlink control information transmitted by using the two PDCCH candidates corresponds to a reference PDCCH candidate of the two PDCCH candidates, the downlink control information for uplink control channel resource determination. According to one aspect of the present disclosure, it is possible to support PDCCH repetition transmission appropriately.
1 . A terminal comprising:
a receiver that receives, via mutually linked search spaces associated with two control resource sets (CORESETs), physical downlink control channels (PDCCHs) that are repeatedly transmitted and used for triggering a physical uplink control channel (PUCCH) transmission, and receives a configuration for two PDCCH candidates that are mutually linked and are PDCCH candidates in the mutually linked search spaces; and
a processor that uses, when downlink control information transmitted by using the two PDCCH candidates corresponds to a reference PDCCH candidate of the two PDCCH candidates, the downlink control information for PUCCH resource determination,
wherein the two CORESETs that are mutually linked are provided with mutually different CORESET pool indices, and
the reference PDCCH candidate is a PDCCH candidate of a CORESET for which a CORESET pool index value=0 or CORESET pool index value=1 is provided.
2 . The terminal according to claim 1 , wherein a same number of PDCCH candidates are configured for each aggregation level for the mutually linked search space sets.
3 . A radio communication method for a terminal, the radio communication method comprising:
receiving, via mutually linked search spaces associated with two control resource sets (CORESETs), physical downlink control channels (PDCCHs) that are repeatedly transmitted and used for triggering a physical uplink control channel (PUCCH) transmission,
receiving a configuration for two PDCCH candidates that are mutually linked and are PDCCH candidates in the mutually linked search spaces; and
using, when downlink control information transmitted by using the two PDCCH candidates corresponds to a reference PDCCH candidate of the two PDCCH candidates, the downlink control information for PUCCH resource determination,
wherein the two CORESETs that are mutually linked are provided with mutually different CORESET pool indices, and
the reference PDCCH candidate is a PDCCH candidate of a CORESET for which a CORESET pool index value=0 or CORESET pool index value=1 is provided.
4 . A base station comprising:
a transmitter that transmits, via mutually linked search spaces associated with two control resource sets (CORESETs), physical downlink control channels (PDCCHs) that are repeatedly transmitted and used for triggering a physical uplink control channel (PUCCH) transmission, and transmits a configuration for two PDCCH candidates that are mutually linked and are PDCCH candidates in the mutually linked search spaces; and
a processor that uses, when downlink control information transmitted by using the two PDCCH candidates corresponds to a reference PDCCH candidate of the two PDCCH candidates, the downlink control information for PUCCH resource determination,
wherein the two CORESETs that are mutually linked are provided with mutually different CORESET pool indices, and
the reference PDCCH candidate is a PDCCH candidate of a CORESET for which a CORESET pool index value=0 or CORESET pool index value=1 is provided.
5 . A system comprising a terminal and a base station, wherein
the terminal comprises:
a receiver that receives, via mutually linked search spaces associated with two control resource sets (CORESETs), physical downlink control channels (PDCCHs) that are repeatedly transmitted and used for triggering a physical uplink control channel (PUCCH) transmission, and receives a configuration for two PDCCH candidates that are mutually linked and are PDCCH candidates in the mutually linked search spaces; and
a processor that uses, when downlink control information transmitted by using the two PDCCH candidates corresponds to a reference PDCCH candidate of the two PDCCH candidates, the downlink control information for PUCCH resource determination,
wherein the two CORESETs that are mutually linked are provided with mutually different CORESET pool indices, and
the reference PDCCH candidate is a PDCCH candidate of a CORESET for which a CORESET pool index value=0 or CORESET pool index value=1 is provided, and
the base station comprises:
a transmitter that transmits the PDCCHs and the configuration.