Method, device and computer storage medium for communication

1 . A method of communication performed by a terminal device, the method comprising:

receiving, from a network device, in a Radio Resource Control (RRC) message, information indicating a time duration;

receiving, from the network device, first downlink control information (DCI) with an indication of a first transmission configuration indicator (TCI) state and second DCI with an indication of a second TCI state;

transmitting, to the network device, a Physical Uplink Control Channel (PUCCH) with positive hybrid automatic repeat request acknowledgement (HARQ-ACK) or a Physical Uplink Shared Channel (PUSCH) with positive HARQ-ACK corresponding to the second DCI, or corresponding to a first Physical Downlink Shared Channel (PDSCH) scheduled by the second DCI; and

applying the second TCI state at a time that is at least the time duration after a last symbol of the PUCCH or the PUSCH, in a case where:

the first TCI state and the second TCI state are to be applied at the time that is at least the time duration after the last symbol of the PUCCH or the PUSCH, and

the second DCI is received later than the first DCI.

2 . The method of claim 1 , further comprising:

receiving, from the network device, a configuration for a plurality of TCI states.

3 . The method of claim 1 , wherein the second TCI state is applied to at least one of a second PDSCH and a first PDCCH, at least the time duration after the last symbol of the PUCCH or the PUSCH.

4 . The method of claim 1 , wherein the first DCI is received in a second PDCCH, and the second DCI is received in a third PDCCH.

5 . The method of claim 1 , wherein the second TCI state is different from the first TCI state.

6 . A method of communication performed by a network device, the method comprising:

transmitting, to a terminal device, in a Radio Resource Control (RRC) message, information indicating a time duration;

transmitting, to the terminal device, first downlink control information (DCI) with an indication of a first transmission configuration indicator (TCI) state and second DCI with an indication of a second TCI state; and

receiving, from the terminal device, a Physical Uplink Control Channel (PUCCH) with positive hybrid automatic repeat request acknowledgement (HARQ-ACK) or a Physical Uplink Shared Channel (PUSCH) with positive HARQ-ACK corresponding to the second DCI, or corresponding to a first Physical Downlink Shared Channel (PDSCH) scheduled by the second DCI,

wherein the second TCI state is applied at a time that is at least the time duration after a last symbol of the PUCCH or the PUSCH, in a case where:

the first TCI state and the second TCI state are to be applied at the time that is at least the time duration after the last symbol of the PUCCH or the PUSCH, and

the second DCI is received later than the first DCI.

7 . The method of claim 6 , further comprising:

transmitting, to the terminal device, a configuration for a plurality of TCI states.

8 . The method of claim 6 , wherein the second TCI state is applied to at least one of a second PDSCH and a first PDCCH, at least the time duration after the last symbol of the PUCCH or the PUSCH.

9 . The method of claim 6 , wherein the first DCI is transmitted in a second PDCCH, and the second DCI is transmitted in a third PDCCH.

10 . The method of claim 6 , wherein the second TCI state is different from the first TCI state.

11 . A terminal device comprising:

at least one memory having program instructions stored therein;

at least one processor that when executing the program instructions performs control for:

receiving, from a network device, in a Radio Resource Control (RRC) message, information indicating a time duration;

receiving, from the network device, first downlink control information (DCI) with an indication of a first transmission configuration indicator (TCI) state and second DCI with an indication of a second TCI state;

transmitting, to the network device, a Physical Uplink Control Channel (PUCCH) with positive hybrid automatic repeat request acknowledgement (HARQ-ACK) or a Physical Uplink Shared Channel (PUSCH) with positive HARQ-ACK corresponding to the second DCI, or corresponding to a first Physical Downlink Shared Channel (PDSCH) scheduled by the second DCI; and

applying the second TCI state at a time that is at least the time duration after a last symbol of the PUCCH or the PUSCH, in a case where:

the first TCI state and the second TCI state are to be applied at the time that is at least the time duration after the last symbol of the PUCCH or the PUSCH, and

the second DCI is received later than the first DCI.

12 . The terminal device of claim 11 , the at least one processor further performs control for:

receiving, from the network device, a configuration for a plurality of TCI states.

13 . The terminal device of claim 11 , wherein the second TCI state is applied to at least one of a second PDSCH and a first PDCCH, at least the time duration after the last symbol of the PUCCH or the PUSCH.

14 . The terminal device of claim 11 , wherein the first DCI is received in a second PDCCH, and the second DCI is received in a third PDCCH.

15 . The terminal device of claim 11 , wherein the second TCI state is different from the first TCI state.