User terminal and radio communication method
A terminal is disclosed including a receiver that receives multiple downlink control information for scheduling downlink shared channels in a plurality of downlink control channels; and a processor that determines an uplink control channel resource for a delivery acknowledgement information based on a control channel element (CCE) index of a downlink control channel corresponding to a specific downlink control information when the delivery acknowledgement information for the multiple downlink control information is transmitted in a same slot, wherein the uplink control channel resource is based on a resource indication field in the specific downlink control information, and wherein the specific downlink control information is a last downlink control information in a time order of the multiple downlink control information. In other aspects, a communication method for a terminal and a base station are also disclosed.
1. A terminal comprising:
a receiver that receives multiple downlink control information for scheduling downlink shared channels in a plurality of downlink control channels; and
a processor that determines an uplink control channel resource for hybrid automatic repeat request acknowledgements (HARQ-ACKs) based on a control channel element (CCE) index of a downlink control channel corresponding to a specific downlink control information responsive to determining that the HARQ-ACKs for the downlink shared channels is transmitted in a same slot,
wherein the uplink control channel resource is based on a resource indication field in the specific downlink control information, and
wherein the specific downlink control information is a last downlink control information in a cell index ascending order of some last downlink control information in a time domain index ascending order of the multiple downlink control information.
2. The terminal according to claim 1 , wherein the CCE index is a starting CCE index of the downlink control channel corresponding to the specific downlink control information.
3. A communication method for a terminal comprising:
receiving multiple downlink control information for scheduling downlink shared channels in a plurality of downlink control channels; and
determining an uplink control channel resource for hybrid automatic repeat request acknowledgements (HARQ-ACKs) based on a control channel element (CCE) index of a downlink control channel corresponding to a specific downlink control information responsive to determining that the HARQ-ACKs for the downlink shared channels is transmitted in a same slot,
wherein the uplink control channel resource is based on a resource indication field in the specific downlink control information, and
wherein the specific downlink control information is a last downlink control information in a cell index ascending order of some last downlink control information in a time domain index ascending order of the multiple downlink control information.
4. A base station comprising:
a processor that determines a control channel element (CCE) index of a downlink control channel corresponding to a specific downlink control information and a resource indication field in the specific downlink control information responsive to determining that hybrid automatic repeat request acknowledgements (HARQ-ACKs) for downlink shared channels is transmitted in a same slot; and
a transmitter that transmits multiple downlink control information for scheduling the downlink shared channels in a plurality of downlink control channels,
wherein the CCE index and the resource indication field are based on an uplink control channel resource for the HARQ-ACKs, and
wherein the specific downlink control information is a last downlink control information in a cell index ascending order of some last downlink control information in a time domain index ascending order of the multiple downlink control information.
5. A system comprising:
a terminal that comprises:
a receiver that receives multiple downlink control information for scheduling downlink shared channels in a plurality of downlink control channels; and
a processor that determines an uplink control channel resource for hybrid automatic repeat request acknowledgements (HARQ-ACKs) based on control channel element (CCE) index of a downlink control channel corresponding to a specific downlink control information responsive to determining that the HARQ-ACKs for the plurality of downlink shared channels is transmitted in a same slot; and
a base station that transmits the multiple downlink control information,
wherein the uplink control channel resource is based on a resource indication field in the specific downlink control information, and
wherein the specific downlink control information is a last downlink control information in a cell index ascending order of some last downlink control information in a time domain index ascending order of the multiple downlink control information.