Methods for communication, terminal device, network device and computer-readable media
Embodiments of the present disclosure relate to methods for communication, terminal devices, network devices and computer readable media. In the method, a terminal device determines a transmission configuration indicator (TCI) state for a physical downlink control channel (PDCCH) candidate, based on at least one of: an index of the PDCCH candidate, and an index of a control channel element (CCE) of the PDCCH candidate. The terminal device monitors the PDCCH candidate based on the TCI state. As a result, the complexity of the terminal device for blind detection or decoding is able to be reduced.
1 . A method performed by a terminal device, the method comprising:
detecting a downlink control information (DCI) format in a physical downlink control channel (PDCCH) reception, wherein:
the PDCCH reception includes a first PDCCH candidate and a second PDCCH candidate,
the first PDCCH candidate is from a first search space set and the second PDCCH candidate is from a second search space set, and
the first PDCCH candidate and the second PDCCH candidate correspond to the DCI format with same information; and
determining a Physical Uplink Control Channel (PUCCH) resource for transmitting Hybrid automatic repeat request acknowledgement (HARQ-ACK) information in a case where the DCI format is detected, based on an index of a first control channel element (CCE) associated with either one of the first search space set or the second search space set.
2 . The method of claim 1 , wherein the PUCCH resource is determined further based on a number of CCEs in a Control Resource Set (CORESET) associated with the one of the first search space set or the second search space set.
3 . The method of claim 1 , wherein the PUCCH resource is determined further based on a parameter that is used to link the first search space set and the second search space set.
4 . The method of claim 1 , wherein the PUCCH resource is determined further based on a value of a PUCCH resource indicator field in the DCI format.
5 . The method of claim 2 , wherein the first CCE is a CCE with a lowest value of CCE index in a set of CCEs in the CORESET associated with the one of the first search space set or the second search space set.
6 . A method performed by a network device, the method comprising:
performing a physical downlink control channel (PDCCH) transmission with a downlink control information (DCI) format, wherein:
the PDCCH transmission includes a first PDCCH candidate and a second PDCCH candidate,
the first PDCCH candidate is from a first search space set and the second PDCCH candidate is from a second search space set,
the first PDCCH candidate and the second PDCCH candidate correspond to the DCI format with same information, and
a Physical Uplink Control Channel (PUCCH) resource for Hybrid automatic repeat request acknowledgement (HARQ-ACK) information is determined based on an index of a first control channel element (CCE) associated with either one of the first search space set or the second search space set in a case where the DCI format is detected by a terminal device; and
receiving the HARQ-ACK information from the terminal device.
7 . The method of claim 6 , wherein the PUCCH resource is determined further based on a number of CCEs in a Control Resource Set (CORESET) associated with the one of the first search space set or the second search space set.
8 . The method of claim 6 , wherein the PUCCH resource is determined further based on a parameter that is used to link the first search space set and the second search space set.
9 . The method of claim 6 , wherein the PUCCH resource is determined further based on a value of a PUCCH resource indicator field in the DCI.
10 . The method of claim 7 , wherein the first CCE is a CCE with a lowest value of CCE index in a set of CCEs in the CORESET associated with the one of the first search space set or the second search space set.
11 . A terminal device, comprising:
a processor configured to cause the terminal device to:
detect a downlink control information (DCI) format in a physical downlink control channel (PDCCH) reception, wherein:
the PDCCH reception includes a first PDCCH candidate and a second PDCCH candidate,
the first PDCCH candidate is from a first search space set and the second PDCCH candidate is from a second search space set, and
the first PDCCH candidate and the second PDCCH candidate correspond to the DCI format with same information; and
determine a Physical Uplink Control Channel (PUCCH) resource for transmitting Hybrid automatic repeat request acknowledgement (HARQ-ACK) information in a case where the DCI format is detected, based on an index of a first control channel element (CCE) associated with either one of the first search space set or the second search space set.
12 . The terminal device of claim 11 , wherein the PUCCH resource is determined further based on a number of CCEs in a Control Resource Set (CORESET) associated with the one of the first search space set or the second search space set.
13 . The terminal device of claim 11 , wherein the PUCCH resource is determined further based on a parameter that is used to link the first search space set and the second search space set.
14 . The terminal device of claim 11 , wherein the PUCCH resource is determined further based on a value of a PUCCH resource indicator field in the DCI.
15 . The terminal device of claim 12 , wherein the first CCE is a CCE with a lowest value of CCE index in a set of CCEs in the CORESET associated with the one of the first search space set or the second search space set.