Method, device and computer storage medium for beam management in communication using transmission configuration indicator states
Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. According to embodiments of the present disclosure, a downlink control information (DCI) indicating a transmission configuration indication (TCI) state is transmitted from a network device to a terminal device. The terminal device applies, based on a first association, the TCI state for receiving a physical downlink shared channel (PDSCH) which is scheduled by the DCI from the network device. The terminal device applies, based on a time threshold and a second association, the TCI state for receiving a physical downlink control channel (PDCCH) transmitted from the network device. As such, a common beam used for PDCCH and PDSCH, which is indicated by a common TCI state, can be updated and the updated beam can be applied for PDCCH and PDSCH transmission/reception in case of multi-TRP transmission.
1 . A method of communication, performed by a terminal device, comprising:
receiving, from a network device, at least one configuration of a first set of transmission configuration indicator (TCI) states and a second set of TCI states, wherein the first set of TCI states is associated with a first identity, and the second set of TCI states is associated with a second identity;
receiving a downlink control information (DCI) with an indication of a codepoint corresponding to one of a first TCI state from the first set of TCI states or a second TCI state from the second set of TCI states; and
receiving, after a timing, a first physical downlink control channel (PDCCH) with the first TCI state, in a case where the first PDCCH is in a control resource set (CORESET) associated with a first set of CORESETs,
receiving, after the timing, the first PDCCH with the second TCI state, in a case where the first PDCCH is in a CORESET associated with a second set of CORESETs,
wherein the timing is based on a configured time period and a last symbol of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) with a hybrid automatic repeat request (HARQ).
2 . The method of claim 1 , wherein
the first identity is a first control resource set (CORESET) pool index, and the second identity is a second CORESET pool index.
3 . The method of claim 1 , wherein
the codepoint corresponds to one TCI state from the first set of TCI states, in a case where the DCI is in a PDCCH in the first set of CORESETs, and the codepoint corresponds to one TCI state from the second set of TCI states, in a case where the DCI is in a PDCCH in the second set of CORESETs.
4 . A method of communication, performed by a network device, comprising:
transmitting, to a terminal device, at least one configuration of a first set of transmission configuration indicator (TCI) states and a second set of TCI states, wherein the first set of TCI states is associated with a first identity, and the second set of TCI states is associated with a second identity;
transmitting a downlink control information (DCI) with an indication of a codepoint corresponding to one of a first TCI state from the first set of TCI states or a second TCI state from the second set of TCI states; and
transmitting, after a timing, a first physical downlink control channel (PDCCH) with the first TCI state, in a case where the first PDCCH is in a control resource set (CORESET) associated with a first set of CORESETs,
transmitting, after the timing, the first PDCCH with the second TCI state, in a case where the first PDCCH is in a CORESET associated with a second set of CORESETs,
wherein the timing is based on a configured time period and a last symbol of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) with a hybrid automatic repeat request (HARQ).
5 . The method of claim 4 , wherein
the first identity is a first control resource set (CORESET) pool index, and the second identity is a second CORESET pool index.
6 . The method of claim 4 , wherein
the codepoint corresponds to one TCI state from the first set of TCI states, in a case where the DCI is in a PDCCH in the first set of CORESETs, and the codepoint corresponds to one TCI state from the second set of TCI states, in a case where the DCI is in a PDCCH in the second set of CORESETs.
7 . A terminal device, comprising:
at least one processor configured to cause the terminal device to:
receive, from a network device, at least one configuration of a first set of transmission configuration indicator (TCI) states and a second set of TCI states, wherein the first set of TCI states is associated with a first identity, and the second set of TCI states is associated with a second identity;
receive a downlink control information (DCI) with an indication of a codepoint corresponding to one of a first TCI state from the first set of TCI states or and a second TCI state from the second set of TCI states; and
receive, after a timing, a first physical downlink control channel (PDCCH) with the first TCI state, in a case where the first PDCCH is in a control resource set (CORESET) associated with a first set of CORESETs,
receive, after the timing, the first PDCCH with the second TCI state, in a case where the first PDCCH is in a CORESET associated with a second set of CORESETs,
wherein the timing is based on a configured time period and a last symbol of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) with a hybrid automatic repeat request (HARQ).
8 . The terminal device of claim 7 , wherein
the first identity is a first control resource set (CORESET) pool index, and the second identity is a second CORESET pool index.
9 . The terminal device of claim 7 , wherein the codepoint corresponds to one TCI state from the first set of TCI states, in a case where the DCI is in a PDCCH in the first set of CORESETs, and the codepoint corresponds to one TCI state from the second set of TCI states, in a case where the DCI is in a PDCCH in the second set of CORESETs.
10 . A network device, comprising:
at least one processor configured to cause the network device to:
transmit, to a terminal device, at least one configuration of a first set of transmission configuration indicator (TCI) states and a second set of TCI states, wherein the first set of TCI states is associated with a first identity, and the second set of TCI states is associated with a second identity;
transmit a downlink control information (DCI) with an indication of a codepoint corresponding to one of a first TCI state from the first set of TCI states or and a second TCI state from the second set of TCI states; and
transmit, after a timing, a first physical downlink control channel (PDCCH) with the first TCI state, in a case where the first PDCCH is in a control resource set (CORESET) associated with a first set of CORESETs,
transmit, after the timing, the first PDCCH with the second TCI state, in a case where the first PDCCH is in a CORESET associated with a second set of CORESETs,
wherein the timing is based on a configured time period and a last symbol of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) with a hybrid automatic repeat request (HARQ).
11 . The network device of claim 10 , wherein
the first identity is a first control resource set (CORESET) pool index, the second identity is a second CORESET pool index.
12 . The network device of claim 10 , wherein
the codepoint corresponds to one TCI state from the first set of TCI states, in a case where the DCI is in a PDCCH in the first set of CORESETs, and the codepoint corresponds to one TCI state from the second set of TCI states, in a case where the DCI is in a PDCCH in the second set of CORESETs.