Method and device in nodes used for wireless communication

A second node for wireless communications, comprising:

• a second transmitter, which transmits a first DCI group, the first DCI group comprising at least one DCI;
• and
• a second receiver, which receives a first signal, the first signal carrying a first HARQ-ACK bit sequence;
• wherein for any DCI in the first DCI group, a first field comprised is used for indicating an accumulative number of {reference cell, time interval}-pair(s) being associated with first-type DCI(s) up to a current reference cell and a current time interval according to a first ordering rule;
• the first ordering rule is a rule of ordering based on at least cell indexes of reference cells and time interval indexes, any of the first-type DCI(s) being used for indicating a PDSCH reception or an SPS PDSCH release;
• a reference cell scheduled by a first-type DCI is a cell having a default cell index among cells scheduled by the first-type DCI, the current reference cell is a cell having a default cell index among cells scheduled by the any DCI in the first DCI group, time-domain resources occupied by the any DCI in the first DCI group belong to the current time interval, and at least one DCI in the first DCI group schedules more than one cell.

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

• receiving a first DCI group, the first DCI group comprising at least one DCI;
• and
• transmitting a first signal, the first signal carrying a first HARQ-ACK bit sequence;
• wherein:
• for any DCI in the first DCI group, a first field comprised is used for indicating an an accumulative number of {reference cell, time interval}-pair(s) being associated with first-type DCI(s) up to a current reference cell and a current time interval according to a first ordering rule;
• the first ordering rule is a rule of ordering based on at least cell indexes of reference cells and time interval indexes, any of the first-type DCI(s) being used for indicating a PDSCH reception or an SPS PDSCH release;
• a reference cell scheduled by a first-type DCI is a cell having a default cell index among cells scheduled by the first-type DCI;
• the current reference cell is a cell having a default cell index among cells(s) scheduled by the any DCI in the first DCI group;
• time-domain resources occupied by the any DCI in the first DCI group belong to the current time interval, and at least one DCI in the first DCI group schedules more than one cell.

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

• transmitting a first DCI group, the first DCI group comprising at least one DCI;
• and
• receiving a first signal, the first signal carrying a first HARQ-ACK bit sequence;
• wherein:
• for any DCI in the first DCI group, a first field comprised is used for indicating an an accumulative number of {reference cell, time interval}-pair(s) being associated with first-type DCI(s) up to a current reference cell and a current time interval according to a first ordering rule;
• the first ordering rule is a rule of ordering based on at least cell indexes of reference cells and time interval indexes, any of the first-type DCI(s) being used for indicating a PDSCH reception or an SPS PDSCH release;
• a reference cell scheduled by a first-type DCI is a cell having a default cell index among cells scheduled by the first-type DCI,
• the current reference cell is a cell having a default cell index among cells scheduled by the any DCI in the first DCI group;
• time-domain resources occupied by the any DCI in the first DCI group belong to the current time interval, and
• at least one DCI in the first DCI group schedules more than one cell.