DCI size alignment method and device

1 . A DCI size alignment method, performed by a communication device, comprising:

performing a downlink control information (DCI) size alignment operation on a plurality of DCI formats according to a DCI size alignment rule; wherein the DCI size alignment rule comprises:

aligning a first DCI format with DCI 1_0 in a common search space (CSS);

wherein the plurality of DCI formats comprise the first DCI format, the first DCI format being used for scheduling a group common physical downlink shared channel (PDSCH);

wherein the aligning a first DCI format with DCI 1_0 in a CSS comprises:

if a DCI size of the first DCI format is less than a first value, performing zero-padding processing on the first DCI format such that the DCI size of the first DCI format is equal to the first value, wherein the first value is a DCI size obtained after alignment of DCI 0_0 and DCI 1_0 in the CSS.

2 . The method according to claim 1 , wherein the aligning a first DCI format with DCI 1_0 in a CSS further comprises at least one of:

if the DCI size of the first DCI format is greater than the first value, performing truncation processing on the first DCI format such that the DCI size of the first DCI format is equal to the first value; or

performing zero-padding or truncation processing on DCI 0_0 and performing zero-padding or truncation processing on DCI 1_0 such that a DCI size of DCI 0_0 and a DCI size of DCI 1_0 are equal to the DCI size of the first DCI format.

3 . The method according to claim 1 , wherein the DCI size alignment rule further comprises aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a user equipment-specific search space (USS), and the aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a USS comprises:

aligning DCI 1_1 in the USS with DCI 0_1 such that a DCI size of DCI 1_1 is equal to a DCI size of DCI 0_1; and

in a case that a DCI size budget is not met, performing zero-padding or truncation processing on DCI 1_1 and performing zero-padding or truncation processing on DCI 0_1 such that the DCI size of DCI 1_1 and the DCI size of DCI 0_1 are equal to a DCI size of the first DCI format.

4 . The method according to claim 1 , wherein the DCI size alignment rule further comprises aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a user equipment-specific search space (USS), and the aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a USS comprises:

aligning a second DCI format with the first DCI format such that a DCI size of the second DCI format is equal to a DCI size of the first DCI format; and

in a case that a DCI size budget is still not yet is not met, aligning a third DCI format with the first DCI format such that a DCI size of the third DCI format is equal to the DCI size of the first DCI format; wherein

the second DCI format is DCI 1_1 or DCI 0_1; and the third DCI format is a DCI format other than the second DCI format in DCI 1_1 and DCI 0_1.

5 . The method according to claim 4 , wherein the second DCI format comprises one of following:

DCI 1_1;

DCI 0_1;

one of DCI 0_1 and DCI 1_1 that has a DCI size smaller than the DCI size of the first DCI format and that has a DCI size closest to the DCI size of the first DCI format;

one of DCI 0_1 and DCI 1_1 that has a DCI size closest to the DCI size of the first DCI format;

one of DCI 0_1 and DCI 1_1 that has a smaller DCI size; and

one of DCI 0_1 and DCI 1_1 that has a larger DCI size.

6 . The method according to claim 1 , wherein the DCI size alignment rule further comprises aligning the first DCI format with DCI 1_2 and/or DCI 0_2 in a user equipment-specific search space (USS), and the aligning the first DCI format with DCI 1_2 and/or DCI 0_2 in the USS comprises:

aligning DCI 1_2 in the USS with DCI 0_2 such that a DCI size of DCI 1_2 is equal to a DCI size of DCI 0_2; and

in a case that a DCI size budget is not met, performing zero-padding or truncation processing on DCI 1_2 and performing zero-padding or truncation processing on DCI 0_2 such that the DCI size of DCI 1_2 and the DCI size of DCI 0_2 are equal to a DCI size of the first DCI format.

7 . The method according to claim 1 , wherein the DCI size alignment rule further comprises aligning the first DCI format with DCI 1_2 and/or DCI 0_2 in a user equipment-specific search space (USS), and the aligning the first DCI format with DCI 1_2 and/or DCI 0_2 in the USS comprises:

aligning a third DCI format with the first DCI format such that a DCI size of the third DCI format is equal to a DCI size of the first DCI format; and

in a case that a DCI size budget is still not yet is not met, aligning a fourth DCI format with the first DCI format such that a DCI size of the fourth DCI format is equal to the DCI size of the first DCI format; wherein

the third DCI format is DCI 1_2 or DCI 0_2; and the fourth DCI format is a DCI format other than the third DCI format in DCI 1_2 and DCI 0_2.

8 . The method according to claim 7 , wherein the third DCI format comprises one of following:

DCI 1_2;

DCI 0_2;

one of DCI 0_2 and DCI 1_2 that has a DCI size smaller than the DCI size of the first DCI format and that has a DCI size closest to the DCI size of the first DCI format;

one of DCI 0_2 and DCI 1_2 that has a DCI size closest to the DCI size of the first DCI format;

one of DCI 0_2 and DCI 1_2 that has a smaller DCI size;

one of DCI 0_2 and DCI 1_2 that has a larger DCI size.

9 . The method according to claim 1 , wherein the DCI size alignment rule further comprises aligning DCI 1_2 and/or DCI 0_2 in a user equipment-specific search space (USS) with DCI 1_1 and/or DCI 0_1, and the aligning DCI 1_2 and/or DCI 0_2 in the USS with DCI 1_1 and/or DCI 0_1 comprises:

aligning DCI 1_2 in the USS with DCI 0_2 such that a DCI size of DCI 1_2 is equal to a DCI size of DCI 0_2;

in a case that a DCI size budget is not met, aligning DCI 1_1 in the USS with DCI 0_1 such that a DCI size of DCI 1_1 is equal to a DCI size of DCI 0_1; and

in a case that the DCI size budget is still not yet met, aligning DCI 1_2 and DCI 0_2 that are obtained through alignment with DCI 1_1 and DCI 0_1 that are obtained through alignment, such that the DCI size of DCI 1_2, the DCI size of DCI 0_2, the DCI size of DCI 1_1, and the DCI size of DCI 0_1 are all equal.

10 . The method according to claim 9 , wherein the DCI 1_2 and DCI 0_2 comprise indicator bits, or the DCI 1_1 and DCI 0_1 comprise indicator bits; wherein

the indicator bits are used to distinguish between a fifth DCI format and a sixth DCI format, the fifth DCI format comprising DCI 1_2 and DCI 0_2, and the sixth DCI format comprising DCI 1_1 and DCI 0_1.

11 . The method according to claim 1 , wherein the method further comprises: determining the DCI size alignment rule based on at least one of:

a DCI size of DCI 1_1, a DCI size of DCI 0_1, a DCI size of DCI 1_2, a DCI size of DCI 0_2, a DCI size of the first DCI format, or higher-layer signaling configuration.

12 . The method according to claim 1 , wherein the method further comprises: determining the DCI size of the first DCI format based on at least one of:

a size of each field of the first DCI format determined based on a parameter configuration of a common frequency resource; or

higher-layer signaling configuration.

13 . The method according to claim 3 , wherein the DCI size budget comprises at least one of following that:

a total number of DCI sizes configured for monitoring by a terminal in a scheduled cell does not exceed 4; or

a total number of DCI sizes scrambled by cell radio network temporary identity (C-RNTI) and/or group radio network temporary identity (G-RNTI) and configured for monitoring by a terminal in a scheduled cell does not exceed 3.

14 . The method according to claim 1 , wherein the method further comprises:

determining a DCI size for monitoring within a DCI size budget; and

monitoring, based on the determined DCI size, a DCI format obtained through the DCI size alignment operation.

15 . A terminal, comprising:

a processor;

a memory; and a program or instructions stored in the memory and executable on the processor, wherein the program or the instructions, when executed by the processor, cause the terminal to perform:

performing a downlink control information (DCI) size alignment operation on a plurality of DCI formats according to a DCI size alignment rule; wherein the DCI size alignment rule comprises:

aligning a first DCI format with DCI 1_0 in a common search space (CSS);

wherein the plurality of DCI formats comprise the first DCI format, the first DCI format being used for scheduling a group common physical downlink shared channel (PDSCH);

wherein the aligning a first DCI format with DCI 1_0 in a CSS comprises:

if a DCI size of the first DCI format is less than a first value, performing zero-padding processing on the first DCI format such that the DCI size of the first DCI format is equal to the first value, wherein the first value is a DCI size obtained after alignment of DCI 0_0 and DCI 1_0 in the CSS.

16 . The terminal according to claim 15 , wherein the aligning a first DCI format with DCI 1_0 in a CSS further comprises at least one of:

if the DCI size of the first DCI format is greater than the first value, performing truncation processing on the first DCI format such that the DCI size of the first DCI format is equal to the first value; or

performing zero-padding or truncation processing on DCI 0_0 and performing zero-padding or truncation processing on DCI 1_0 such that a DCI size of DCI 0_0 and a DCI size of DCI 1_0 are equal to the DCI size of the first DCI format.

17 . The terminal according to claim 15 , wherein the DCI size alignment rule further comprises aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a user equipment-specific search space (USS), and the aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a USS comprises:

aligning DCI 1_1 in the USS with DCI 0_1 such that a DCI size of DCI 1_1 is equal to a DCI size of DCI 0_1; and

in a case that a DCI size budget is not met, performing zero-padding or truncation processing on DCI 1_1 and performing zero-padding or truncation processing on DCI 0_1 such that the DCI size of DCI 1_1 and the DCI size of DCI 0_1 are equal to a DCI size of the first DCI format.

18 . The terminal according to claim 15 , wherein the DCI size alignment rule further comprises aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a user equipment-specific search space (USS), and the aligning the first DCI format with DCI 1_1 and/or DCI 0_1 in a USS comprises:

aligning a second DCI format with the first DCI format such that a DCI size of the second DCI format is equal to a DCI size of the first DCI format; and

in a case that a DCI size budget is not met, aligning a third DCI format with the first DCI format such that a DCI size of the third DCI format is equal to the DCI size of the first DCI format; wherein

the second DCI format is DCI 1_1 or DCI 0_1; and the third DCI format is a DCI format other than the second DCI format in DCI 1_1 and DCI 0_1.

19 . A network-side device, comprising:

a processor;

a memory; and a program or instructions stored in the memory and executable on the processor, wherein the program or the instructions, when executed by the processor, cause the network-side device to perform:

performing a downlink control information (DCI) size alignment operation on a plurality of DCI formats according to a DCI size alignment rule; wherein the DCI size alignment rule comprises:

aligning a first DCI format with DCI 1_0 in a common search space (CSS);

wherein the plurality of DCI formats comprise the first DCI format, the first DCI format being used for scheduling a group common physical downlink shared channel (PDSCH);

wherein the aligning a first DCI format with DCI 1_0 in a CSS comprises:

if a DCI size of the first DCI format is less than a first value, performing zero-padding processing on the first DCI format such that the DCI size of the first DCI format is equal to the first value, wherein the first value is a DCI size obtained after alignment of DCI 0_0 and DCI 1_0 in the CSS.

20 . The method according to claim 1 , wherein the performing the DCI size alignment operation on the plurality of DCI formats according to the DCI size alignment rule comprises:

determining whether a number of DCI sizes of the plurality of DCI formats meets a DCI size budget; and

in a case that the DCI size budget is not met, performing the DCI size alignment operation on the plurality of DCI formats according to the DCI size alignment rule until the DCI size budget is met.