METHOD AND DEVICE IN NODES USED FOR WIRELESS COMMUNICATION

1 . A first node for wireless communications, comprising:

a first receiver, receiving a second information block, the second information block being used to determine that a first search space set and a second search space set are linked;

the first receiver, receiving a first information block, the first information block being used to determine a reference time-domain resource set; and

the first receiver, monitoring at least a first PDCCH candidate in the first search space set and at least a second PDCCH candidate in the second search space set;

wherein the first PDCCH candidate and the second PDCCH candidate are monitored for detecting a DCI format with same information; at least one of QCL information of a DMRS antenna port for a PDCCH reception on the first PDCCH candidate or QCL information of a DMRS antenna port for a PDCCH reception on the second PDCCH candidate depends on whether at least one of the first PDCCH candidate or the second PDCCH candidate overlaps with the reference time-domain resource set in time domain.

2 . The first node according to claim 1 , wherein

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located;

or,

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, or when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when between the first PDCCH candidate and the second PDCCH candidate, one PDCCH candidate is orthogonal to the reference time-domain resource set in time domain and the other PDCCH candidate overlaps with the reference time-domain resource set, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located.

3 . The first node according to claim 1 , wherein a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; a target time-domain resource set comprises time-domain resources outside the reference time-domain resource set; in the target time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a first RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a second RS resource are quasi co-located; in the reference time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a third RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a fourth RS resource are quasi co-located.

4 . The first node according to claim 2 , comprising:

the first receiver, receiving a third information block; wherein the third information block indicates configuration information of a first CORESET and configuration information of a second CORESET; the first CORESET is associated with the first search space set, and the second CORESET is associated with the second search space set; the configuration information of the first CORESET is used to determine at least one of the first RS resource or the third RS resource, and the configuration information of the second CORESET is used to determine at least one of the second RS resource or the fourth RS resource;

or,

a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; the first CORESET is configured with only one TCI state, the second CORESET is configured with two TCI states, the only one TCI state configured for the first CORESET indicates the first RS resource, the third RS resource is the first RS resource, and the two TCI states configured for the second CORESET respectively indicate the second RS resource and the fourth RS resource; or, the second CORESET is configured with only one TCI state, the first CORESET is configured with two TCI states, the only one TCI state configured for the second CORESET indicates the second RS resource, the fourth RS resource is the second RS resource, and the two TCI states configured for the first CORESET respectively indicate the first RS resource and the third RS resource.

5 . The first node according to claim 1 , wherein

the reference time-domain resource set comprises one or multiple symbols, at least one symbol in the reference time-domain resource set is configured as DL by a higher-layer parameter, and one or multiple subcarriers in one or multiple symbols configured as DL by the higher-layer parameter in the reference time-domain resource set are used for uplink transmission;

or,

there exist two PDCCH candidates respectively on two types of symbols in the first search space set, there exist two PDCCH candidates respectively on two types of symbols in the second search space set, and the reference time-domain resource set comprises only one type of symbols between the two types of symbols.

6 . A second node for wireless communications, comprising:

a second transmitter, transmitting a second information block, the second information block being used to determine that a first search space set and a second search space set are linked; and

the second transmitter, transmitting a first information block, the first information block being used to determine a reference time-domain resource set;

wherein a receiver of the second information block monitors at least a first PDCCH candidate in the first search space set and at least a second PDCCH candidate in the second search space set; the first PDCCH candidate and the second PDCCH candidate are monitored for detecting a DCI format with same information;

at least one of QCL information of a DMRS antenna port for a PDCCH reception on the first PDCCH candidate or QCL information of a DMRS antenna port for a PDCCH reception on the second PDCCH candidate depends on whether at least one of the first PDCCH candidate or the second PDCCH candidate overlaps with the reference time-domain resource set in time domain.

7 . The second node according to claim 6 , wherein

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located;

or,

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, or when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when between the first PDCCH candidate and the second PDCCH candidate, one PDCCH candidate is orthogonal to the reference time-domain resource set in time domain and the other PDCCH candidate overlaps with the reference time-domain resource set, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located.

8 . The second node according to claim 6 , wherein a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; a target time-domain resource set comprises time-domain resources outside the reference time-domain resource set; in the target time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a first RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a second RS resource are quasi co-located; in the reference time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a third RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a fourth RS resource are quasi co-located.

9 . The second node according to claim 7 , wherein

comprising: the second transmitter, transmitting a third information block; wherein the third information block indicates configuration information of a first CORESET and configuration information of a second CORESET; the first CORESET is associated with the first search space set, and the second CORESET is associated with the second search space set; the configuration information of the first CORESET is used to determine at least one of the first RS resource or the third RS resource, and the configuration information of the second CORESET is used to determine at least one of the second RS resource or the fourth RS resource;

or,

a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; the first CORESET is configured with only one TCI state, the second CORESET is configured with two TCI states, the only one TCI state configured for the first CORESET indicates the first RS resource, the third RS resource is the first RS resource, and the two TCI states configured for the second CORESET respectively indicate the second RS resource and the fourth RS resource; or, the second CORESET is configured with only one TCI state, the first CORESET is configured with two TCI states, the only one TCI state configured for the second CORESET indicates the second RS resource, the fourth RS resource is the second RS resource, and the two TCI states configured for the first CORESET respectively indicate the first RS resource and the third RS resource.

10 . The second node according to claim 6 , wherein

the reference time-domain resource set comprises one or multiple symbols, at least one symbol in the reference time-domain resource set is configured as DL by a higher-layer parameter, and one or multiple subcarriers in one or multiple symbols configured as DL by the higher-layer parameter in the reference time-domain resource set are used for uplink transmission;

or,

there exist two PDCCH candidates respectively on two types of symbols in the first search space set, there exist two PDCCH candidates respectively on two types of symbols in the second search space set, and the reference time-domain resource set comprises only one type of symbols between the two types of symbols.

11 . A method in a first node for wireless communications, comprising:

receiving a second information block, the second information block being used to determine that a first search space set and a second search space set are linked;

receiving a first information block, the first information block being used to determine a reference time-domain resource set; and

monitoring at least a first PDCCH candidate in the first search space set and at least a second PDCCH candidate in the second search space set;

wherein the first PDCCH candidate and the second PDCCH candidate are monitored for detecting a DCI format with same information; at least one of QCL information of a DMRS antenna port for a PDCCH reception on the first PDCCH candidate or QCL information of a DMRS antenna port for a PDCCH reception on the second PDCCH candidate depends on whether at least one of the first PDCCH candidate or the second PDCCH candidate overlaps with the reference time-domain resource set in time domain.

12 . The method according to claim 11 , wherein

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located;

or,

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, or when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when between the first PDCCH candidate and the second PDCCH candidate, one PDCCH candidate is orthogonal to the reference time-domain resource set in time domain and the other PDCCH candidate overlaps with the reference time-domain resource set, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located.

13 . The method according to claim 11 , wherein a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; a target time-domain resource set comprises time-domain resources outside the reference time-domain resource set; in the target time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a first RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a second RS resource are quasi co-located; in the reference time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a third RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a fourth RS resource are quasi co-located.

14 . The method according to claim 12 , wherein

comprising: receiving a third information block; wherein the third information block indicates configuration information of a first CORESET and configuration information of a second CORESET; the first CORESET is associated with the first search space set, and the second CORESET is associated with the second search space set; the configuration information of the first CORESET is used to determine at least one of the first RS resource or the third RS resource, and the configuration information of the second CORESET is used to determine at least one of the second RS resource or the fourth RS resource;

or,

a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; the first CORESET is configured with only one TCI state, the second CORESET is configured with two TCI states, the only one TCI state configured for the first CORESET indicates the first RS resource, the third RS resource is the first RS resource, and the two TCI states configured for the second CORESET respectively indicate the second RS resource and the fourth RS resource; or, the second CORESET is configured with only one TCI state, the first CORESET is configured with two TCI states, the only one TCI state configured for the second CORESET indicates the second RS resource, the fourth RS resource is the second RS resource, and the two TCI states configured for the first CORESET respectively indicate the first RS resource and the third RS resource.

15 . The method according to claim 11 , wherein

the reference time-domain resource set comprises one or multiple symbols, at least one symbol in the reference time-domain resource set is configured as DL by a higher-layer parameter, and one or multiple subcarriers in one or multiple symbols configured as DL by the higher-layer parameter in the reference time-domain resource set are used for uplink transmission;

or,

there exist two PDCCH candidates respectively on two types of symbols in the first search space set, there exist two PDCCH candidates respectively on two types of symbols in the second search space set, and the reference time-domain resource set comprises only one type of symbols between the two types of symbols.

16 . A method in a second node for wireless communications, comprising:

transmitting a second information block, the second information block being used to determine that a first search space set and a second search space set are linked; and

transmitting a first information block, the first information block being used to determine a reference time-domain resource set;

wherein a receiver of the second information block monitors at least a first PDCCH candidate in the first search space set and at least a second PDCCH candidate in the second search space set; the first PDCCH candidate and the second PDCCH candidate are monitored for detecting a DCI format with same information;

at least one of QCL information of a DMRS antenna port for a PDCCH reception on the first PDCCH candidate or QCL information of a DMRS antenna port for a PDCCH reception on the second PDCCH candidate depends on whether at least one of the first PDCCH candidate or the second PDCCH candidate overlaps with the reference time-domain resource set in time domain.

17 . The method according to claim 16 , comprising:

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located;

or,

when both the first PDCCH candidate and the second PDCCH candidate are orthogonal to the reference time-domain resource set in time domain, or when both the first PDCCH candidate and the second PDCCH candidate belong to the reference time-domain resource set in time domain, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a first RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a second RS resource are quasi co-located; when between the first PDCCH candidate and the second PDCCH candidate, one PDCCH candidate is orthogonal to the reference time-domain resource set in time domain and the other PDCCH candidate overlaps with the reference time-domain resource set, the DMRS antenna port for the PDCCH reception on the first PDCCH candidate and a third RS resource are quasi co-located, and the DMRS antenna port for the PDCCH reception on the second PDCCH candidate and a fourth RS resource are quasi co-located.

18 . The method according to claim 16 , wherein a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; a target time-domain resource set comprises time-domain resources outside the reference time-domain resource set; in the target time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a first RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a second RS resource are quasi co-located; in the reference time-domain resource set, a DMRS antenna port for a PDCCH reception in the first CORESET and a third RS resource are quasi co-located, and a DMRS antenna port for a PDCCH reception in the second CORESET and a fourth RS resource are quasi co-located.

19 . The method according to claim 17 , wherein

comprising: transmitting a third information block; wherein the third information block indicates configuration information of a first CORESET and configuration information of a second CORESET; the first CORESET is associated with the first search space set, and the second CORESET is associated with the second search space set; the configuration information of the first CORESET is used to determine at least one of the first RS resource or the third RS resource, and the configuration information of the second CORESET is used to determine at least one of the second RS resource or the fourth RS resource;

or,

a first CORESET is associated with the first search space set, and a second CORESET is associated with the second search space set; the first CORESET is configured with only one TCI state, the second CORESET is configured with two TCI states, the only one TCI state configured for the first CORESET indicates the first RS resource, the third RS resource is the first RS resource, and the two TCI states configured for the second CORESET respectively indicate the second RS resource and the fourth RS resource; or, the second CORESET is configured with only one TCI state, the first CORESET is configured with two TCI states, the only one TCI state configured for the second CORESET indicates the second RS resource, the fourth RS resource is the second RS resource, and the two TCI states configured for the first CORESET respectively indicate the first RS resource and the third RS resource.

20 . The method according to claim 16 , wherein

the reference time-domain resource set comprises one or multiple symbols, at least one symbol in the reference time-domain resource set is configured as DL by a higher-layer parameter, and one or multiple subcarriers in one or multiple symbols configured as DL by the higher-layer parameter in the reference time-domain resource set are used for uplink transmission;

or,

there exist two PDCCH candidates respectively on two types of symbols in the first search space set, there exist two PDCCH candidates respectively on two types of symbols in the second search space set, and the reference time-domain resource set comprises only one type of symbols between the two types of symbols.