Method and device for PDSCH transmission/reception in a wireless communication system that supports multi-transmission reception point
Disclosed are a method and a device for PDSCH transmission or reception in a wireless communication system. According to an embodiment of the present disclosure, a method for transmitting hybrid-automatic repeat and request (HARQ)-acknowledgement (ACK) information may comprise the steps of: receiving, from a base station, downlink control information (DCI) for scheduling of a physical downlink shared channel (PDSCH) in a physical downlink control channel (PDCCH); receiving the PDSCH from the base station; and transmitting an HARQ-ACK codebook including HARQ-ACK information for the PDSCH to the base station. The PDCCH may be repeatedly transmitted in a plurality of monitoring occasions (MOs), and a parameter related to the HARQ-ACK codebook may be determined on the basis of the most advanced MO among the plurality of MOs.
1 . A method comprising:
receiving, by a terminal, from a base station, downlink control information (DCI) formats scheduling a plurality of PDSCHs (physical downlink shared channels) in a plurality of PDCCH (physical downlink control channel) monitoring occasions (MOS), wherein each of the DCI formats includes a counter downlink assignment index (C-DAI);
receiving, by the terminal, from the base station, the plurality of PDSCHs; and
transmitting, by the terminal, to the base station, a HARQ (Hybrid-Automatic Repeat and request)-ACK (Acknowledgement) codebook including HARQ-ACK information for the plurality of PDSCHs,
wherein, based on a first DCI format among the DCI formats being repetitively transmitted in two or more PDCCH MOs among the plurality of PDCCH MOs, the earliest MO of the first DCI format is determined as a reception occasion for the two or more PDCCH MOs,
wherein a reception order of the plurality of PDCCH MOs is determined based on the reception occasion, and
wherein a value of the C-DAI in each of the DCI formats is determined based on the reception order of the plurality of PDCCH MOs.
2 . The method of claim 1 , wherein and/or a total DAI (T-DAI) related to the HARQ-ACK codebook are determined based on the earliest MO.
3 . The method of claim 1 , wherein, based on a PUCCH resource indication (PRI) of the most recently received DCI being used to determine a PUCCH (physical uplink control channel) resource that the HARQ-ACK codebook is transmitted, the most recently received DCI format for the DCI formats is determined based on the reception order of the plurality of PDCCH MOs.
4 . The method of claim 3 , wherein based on a second DCI format being received together at the earliest MO, the most recently received DCI format is determined based on a control channel element (CCE) index of the DCI formats.
5 . The method of claim 1 , wherein an offset between a PDCCH of the first DCI format and a PDSCH scheduled by the first DCI format is applied based on the latest MO of the two or more of MOs.
6 . The method of claim 1 , wherein the first DCI format is repetitively transmitted in multiple serving cells to which a carrier aggregation (CA) is applied.
7 . The method of claim 1 , wherein a demodulation reference signal (DMRS) of each PDCCH candidate in the two or more of MOs is associated with a different transmission configuration indication (TCI) state.
8 . The method of claim 7 , wherein a TCI state indicated by a codepoint of a TCI state field of the first DCI is configured differently from a third DCI format detected in a single PDCCH candidate.
9 . The method of claim 8 , wherein a TCI state pool for a TCI state field of the first DCI format and a TCI state pool for a TCI state field of the third DCI format detected are independently configured.
10 . The method of claim 8 , wherein and a TCI state pool for a TCI state field of the first DCI format and a TCI field of the third DCI format is common,
wherein a TCI state candidate for a TCI state field of the first DCI format and a TCI state candidate for a TCI state field of the third DCI format are independently configured by a medium access control (MAC) control element (CE).
11 . A terminal comprising:
at least one transceiver for transmitting and receiving a wireless signal; and
at least one processor which control the at least one transceiver,
the at least one processor configured to:
receive, from a base station, downlink control information (DCI) formats scheduling a plurality of PDSCHs (physical downlink shared channels) in a plurality of PDCCH (physical downlink control channel) monitoring occasions (MOs), wherein each of the DCI formats includes a counter downlink assignment index (C-DAI);
receive, from the base station, the plurality of PDSCHs; and
transmit, to the base station, a HARQ (Hybrid-Automatic Repeat and request)-ACK (Acknowledgement) codebook including HARQ-ACK information for the plurality of PDSCHs,
wherein, based on a first DCI format among the DCI formats being repetitively transmitted in two or more PDCCH MOs among the plurality of PDCCH MOs, the earliest MO of the first DCI format is determined as a reception occasion for two or more PDCCH MOs,
wherein a reception order of the plurality of PDCCH MOs is determined based on the reception occasion, and
wherein a value of the C-DAI in each of the DCI formats is determined based on the reception order of the plurality of PDCCH MOs.
12 . A method comprising:
transmitting, by a base station, to a terminal, downlink control information (DCI) formats scheduling a plurality of PDSCHs (physical downlink shared channels) in a plurality of PDCCH (physical downlink control channel) monitoring occasions (MOs), wherein each of the DCI formats includes a counter downlink assignment index (C-DAI);
transmitting, by the base station, to the terminal, the plurality of PDSCHs; and
receiving, by the base station, from the terminal, a HARQ (Hybrid-Automatic Repeat and request)-ACK (Acknowledgement) codebook including HARQ-ACK information for the plurality of PDSCHs,
wherein, based on a first DCI format among the DCI formats being repetitively transmitted in two or more PDCCH MOs among the plurality of PDCCH MOs, the earliest MO of the first DCI format is determined as a reception occasion for the two or more PDCCH MOs,
wherein a reception order of the plurality of PDCCH MOs is determined based on the reception occasion, and
wherein a value of the C-DAI in each of the DCI formats is determined based on the reception order of the plurality of PDCCH MOs.
13 . A base station comprising:
at least one transceiver for transmitting and receiving a wireless signal; and
at least one processor which control the at least one transceiver,
the at least one processor configured to:
transmit, to a terminal, downlink control information (DCI) formats scheduling a plurality of PDSCHs (physical downlink shared channels) in a plurality of PDCCH (physical downlink control channel) monitoring occasions (MOs), wherein each of the DCI formats includes a counter downlink assignment index (C-DAI);
transmit, to the terminal, the plurality of PDSCHs; and
receive, from the terminal, a HARQ (Hybrid-Automatic Repeat and request)-ACK (Acknowledgement) codebook including HARQ-ACK information for the plurality of PDSCHs,
wherein based on a first DCI format among the DCI formats being repetitively transmitted in two or more PDCCH MOs among the plurality of PDCCH MOs, the earliest MO of the first DCI format is determined as a reception occasion for for the two or more PDCCH MOs,
wherein a reception order of the plurality of PDCCH MOs is determined based on the reception occasion, and
wherein a value of the C-DAI in each of the DCI formats is determined based on the reception order of the plurality of PDCCH MOS.