Method and device in nodes used for wireless communication

1 . A User Equipment (UE) for wireless communications, comprising:

a transceiver operatively coupled to a processor, the transceiver and processor configured to receive radio resource control (RRC) signaling including a first information block,

wherein the first information block is used for determining a scheduled cell set, and

wherein the scheduled cell set comprises a plurality of serving cells; and

the transceiver and processor configured to monitor M1 control channel candidates in a first time window,

wherein the M1 control channel candidates occupy M2 Control Channel Elements (CCEs),

wherein M1 is a positive integer greater than 1,

wherein M2 is a positive integer greater than 1,

wherein a first Subcarrier Spacing (SCS) of a subcarrier occupied by one of the M2 CCEs in a frequency domain is used for determining a time length of the first time window,

wherein the plurality of serving cells are divided into W cell groups,

wherein W is an integer greater than 1,

wherein the first SCS is one of X candidate SCSs,

wherein X is a positive integer greater than 1,

wherein the X candidate SCSs correspond to X first-type candidate parameters,

wherein any of the X first-type candidate parameters is a positive integer,

wherein the X candidate SCSs correspond to X second-type candidate parameters,

wherein any of the X second-type candidate parameters is a positive integer, and

wherein at least one of the M1 control channel candidates is associated with at least one cell group of the W cell groups.

2 . The UE according to claim 1 , wherein the W cell groups comprise a first cell group and a second cell group, and the first cell group is different from the second cell group; on a condition that a number of control resource pool(s) provided in a scheduling cell of the first serving cell is equal to 1 or no control resource pool is provided in a scheduling cell of the first serving cell, then the first serving cell belongs to the first cell group; and on a condition that a number of control resource pools provided in a scheduling cell of the first serving cell is greater than 1, then the first serving cell belongs to the second cell group.

3 . The UE according to claim 1 , wherein a number of scheduling cell(s) of a first serving cell of the plurality of serving cells is used for determining a cell group that the first serving cell belongs to out of the W cell groups.

4 . The UE according to claim 1 , wherein the transceiver transmits a second information block, and the transceiver receives a third information block, wherein the second information block is used for indicating a first candidate factor out of a first candidate factor set, wherein the first candidate factor set comprises more than one candidate factors, wherein the first candidate factor is a candidate factor comprised in the first candidate factor set, and wherein any candidate factor comprised in the first candidate factor set is greater than 0.

5 . The UE according to claim 1 , wherein a first control channel candidate is one of the M1 control channel candidates, and a second control channel candidate is a control channel candidate other than the first control channel candidate among the M1 control channel candidates; and, wherein CCEs occupied by the first control channel candidate are different from CCEs occupied by the second control channel candidate, or scrambling used by the first control channel candidate is different from scrambling used by the second control channel candidate, or a payload size of a Downlink Control Information (DCI) format corresponding to the first control channel candidate is different from a payload size of a DCI format corresponding to the second control channel candidate.

6 . A base station for wireless communications, comprising:

a transceiver, operatively coupled to a processor, the transceiver and processor configured to transmit radio resource control (RRC) signaling including a first information block,

wherein the first information block is used for indicating a scheduled cell set, and

wherein the scheduled cell set comprises a plurality of serving cells; and

the transceiver and processor configured to determine M1 control channel candidates in a first time window,

wherein the M1 control channel candidates occupy M2 CCEs,

wherein M1 is a positive integer greater than 1,

wherein M2 is a positive integer greater than 1,

wherein a first Subcarrier Spacing (SCS) of a subcarrier occupied by one of the M2 CCEs in a frequency domain is used for determining a time length of the first time window,

wherein the plurality of serving cells are divided into W cell groups,

wherein W is an integer greater than 1,

wherein the first SCS is one of X candidate SCSs,

wherein X is a positive integer greater than 1,

wherein the X candidate SCSs correspond to X first-type candidate parameters,

wherein any of the X first-type candidate parameters is a positive integer,

wherein the X candidate SCSs correspond to X second-type candidate parameters,

wherein any of the X second-type candidate parameters is a positive integer, and

wherein at least one of the M1 control channel candidates is associated with at least one cell group of the W cell groups.

7 . The base station according to claim 6 , wherein the W cell groups comprise a first cell group and a second cell group, and the first cell group is different from the second cell group; on a condition that a number of control resource pool(s) provided in a scheduling cell of the first serving cell is equal to 1 or no control resource pool is provided in a scheduling cell of the first serving cell, then the first serving cell belongs to the first cell group; and on a condition that when a number of control resource pools provided in a scheduling cell of the first serving cell is greater than 1, then the first serving cell belongs to the second cell group.

8 . The base station according to claim 6 , wherein a number of scheduling cell(s) of a first serving cell of the plurality of serving cells is used for determining a cell group that the first serving cell belongs out of the W cell groups.

9 . The base station according to claim 6 , wherein the transceiver transmits a second information block, and the transceiver receives a third information block, wherein the second information block is used for indicating a first candidate factor out of a first candidate factor set, wherein the first candidate factor set comprises more than one candidate factors, wherein the first candidate factor is a candidate factor comprised in the first candidate factor set, and wherein any candidate factor comprised in the first candidate factor set is greater than 0.

10 . A method for use by a User Equipment (UE) for wireless communications, comprising:

receiving a radio resource control (RRC) signaling including a first information block,

wherein the first information block is used for determining a scheduled cell set, and

wherein the scheduled cell set comprises a plurality of serving cells; and

monitoring M1 control channel candidates in a first time window,

wherein the M1 control channel candidates occupy M2 CCEs,

wherein M1 is a positive integer greater than 1,

wherein M2 is a positive integer greater than 1,

wherein a first Subcarrier Spacing (SCS) of a subcarrier occupied by one of the M2 CCEs in a frequency domain is used for determining a time length of the first time window,

wherein the plurality of serving cells are divided into W cell groups,

wherein W is an integer greater than 1,

wherein the first SCS is one of X candidate SCSs,

wherein X is a positive integer greater than 1,

wherein the X candidate SCSs correspond to X first-type candidate parameters,

wherein any of the X first-type candidate parameters is a positive integer,

wherein the X candidate SCSs correspond to X second-type candidate parameters,

wherein any of the X second-type candidate parameters is a positive integer, and

wherein at least one of the M1 control channel candidates is associated with at least one cell group of the W cell groups.

11 . The method according to claim 10 , wherein the W cell groups comprise a first cell group and a second cell group, and the first cell group is different from the second cell group; on a condition that a number of control resource pool(s) provided in a scheduling cell of the first serving cell is equal to 1 or no control resource pool is provided in a scheduling cell of the first serving cell, then the first serving cell belongs to the first cell group; and on a condition that a number of control resource pools provided in a scheduling cell of the first serving cell is greater than 1, then the first serving cell belongs to the second cell group.

12 . The method according to claim 10 , wherein a number of scheduling cell(s) of a first serving cell of the plurality of serving cells is used for determining a cell group that the first serving cell belongs to out of the W cell groups.

13 . The method according to claim 10 , comprising:

transmitting a second information block;

receiving a third information block;

wherein the second information block is used for indicating a first candidate factor out of a first candidate factor set, wherein the first candidate factor set comprises more than one candidate factors, wherein the first candidate factor is a candidate factor comprised in the first candidate factor set, and wherein any candidate factor comprised in the first candidate factor set is greater than 0.

14 . The method according to claim 10 , wherein a first control channel candidate is one of the M1 control channel candidates, and a second control channel candidate is a control channel candidate other than the first control channel candidate among the M1 control channel candidates; and wherein CCEs occupied by the first control channel candidate are different from CCEs occupied by the second control channel candidate, or scrambling used by the first control channel candidate is different from scrambling used by the second control channel candidate, or a payload size of a Downlink Control Information (DCI) format corresponding to the first control channel candidate is different from a payload size of a DCI format corresponding to the second control channel candidate.