Downlink control information DCI transmission method and communication device

1 . A downlink control information (DCI) transmission method, comprising:

obtaining a first bit number of first DCI, wherein the first DCI is sidelink downlink control information (SL DCI);

determining a third bit number of the first DCI according to the first bit number and a second bit number of second DCI; and

performing transmission of the first DCI according to the third bit number; wherein

the second DCI comprises target DCI in Uu DCI corresponding to a first object; and

the first object is a Uu cell or carrier for transmission of the first DCI.

2 . The method according to claim 1 , wherein the first DCI meets at least one of following:

a number of bit numbers of the first DCI and third DCI is less than or equal to M 1 , M 1 being a positive integer, and the third DCI being the Uu DCI corresponding to the first object, wherein M 1 is 4, and the number of bit numbers of the first DCI and the third DCI is less than or equal to 4;

a number of bit numbers of the first DCI and fourth DCI is less than or equal to M 2 , M 2 being a positive integer, and the fourth DCI being dedicated Uu DCI corresponding to the first object; or

a number of bit number of the first DCI scheduling the first object is less than or equal to M 3 , M 3 being a positive integer.

3 . The method according to claim 1 , wherein the second bit number of the second DCI is a bit number of the target DCI corresponding to a target object, and the target object is one of L second objects in the first object, wherein L is a positive integer, and each of the second objects is one of a bandwidth part (BWP), a BWP pair, a cell pair, or a carrier pair.

4 . The method according to claim 3 , wherein the bit number of the target DCI corresponding to the L second objects comprises at least one of following:

a bit number of the target DCI corresponding to each BWP pair;

a bit number of the target DCI corresponding to each uplink BWP;

a bit number of the target DCI corresponding to each downlink BWP; or

a bit number of the target DCI corresponding to each SL BWP;

or

the bit number of the target DCI corresponding to the L second objects comprises: a bit number of the target DCI corresponding to each cell pair or carrier pair.

5 . The method according to claim 3 , wherein the target object is an activated second object in the L second objects; or

the target object is any one of following:

a second object corresponding to DCI with a largest or smallest bit number of the target DCI in the L second objects;

a second object comprising most or least resources in the L second objects;

a second object comprising a largest or smallest number of resources in the L second objects;

a second object whose bit number of the target DCI is closest to the first bit number in the L second objects;

a second object whose bit number of the target DCI is larger than the first bit number and closest to the first bit number in the L second objects; or

a second object whose bit number of the target DCI is smaller than the first bit number and closest to the first bit number in the L second objects.

6 . The method according to claim 3 , wherein in a case that the target object is switched or changed, the second bit number is: a bit number of the target DCI corresponding to a target object which is switched or changed; or

in a case that at least one sub-object in the target object is switched or changed, the second bit number of the second DCI is: a bit number of the target DCI corresponding to a target object in which a sub-object which is switched or changed is located.

7 . The method according to claim 1 , wherein the second DCI comprises Q 1 pieces of target DCI, Q 1 being an integer greater than 1.

8 . The method according to claim 7 , wherein the determining the third bit number of the first DCI according to the first bit number of the first DCI and the second bit number of second DCI comprises:

obtaining the third bit number based on alignment between the first DCI and fifth DCI, wherein the fifth DCI is first or last target DCI in Q 2 pieces of target DCI arranged according to the bit number of the target DCI from large to small, and the Q 2 pieces of target DCI are part or all of the Q 1 pieces of target DCI.

9 . The method according to claim 8 , wherein the Q 2 pieces of target DCI are target DCI that is not in a first format in the Q 1 pieces of target DCI; and/or

the third bit number is equal to the second bit number corresponding to the fifth DCI or the first bit number; and/or

a bit number of the fifth DCI is equal to the first bit number or the third bit number.

10 . The method according to claim 1 , wherein the target DCI comprises at least one of following: DCI of user-specific search space, fallback DCI, non-fallback DCI, DCI that is not in a first format, or DCI in a second format.

11 . The method according to claim 1 , wherein in a case that a network device does not configure the second DCI for a terminal, a behavior of the terminal comprises one of following:

determining that an error occurs on the first DCI;

skipping monitoring the first DCI; or

monitoring the first DCI, the third bit number being equal to the first bit number.

12 . A communication device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, causes the communication device to perform:

obtaining a first bit number of first downlink control information (DCI), wherein the first DCI is sidelink downlink control information (SL DCI);

determining a third bit number of the first DCI according to the first bit number and a second bit number of second DCI; and

performing transmission of the first DCI according to the third bit number; wherein

the second DCI comprises target DCI in Uu DCI corresponding to a first object; and

the first object is a Uu cell or carrier for transmission of the first DCI.

13 . The communication device according to claim 12 , wherein the first DCI meets at least one of following:

a number of bit numbers of the first DCI and third DCI is less than or equal to M 1 , M 1 being a positive integer, and the third DCI being the Uu DCI corresponding to the first object, wherein M 1 is 4, and the number of bit numbers of the first DCI and the third DCI is less than or equal to 4;

a number of bit numbers of the first DCI and fourth DCI is less than or equal to M 2 , M 2 being a positive integer, and the fourth DCI being dedicated Uu DCI corresponding to the first object; or

a number of bit number of the first DCI scheduling the first object is less than or equal to M 3 , M 3 being a positive integer.

14 . The communication device according to claim 12 , wherein the second bit number of the second DCI is a bit number of the target DCI corresponding to a target object, and the target object is one of L second objects in the first object, wherein L is a positive integer, and each of the second objects is one of a bandwidth part (BWP), a BWP pair, a cell pair, or a carrier pair.

15 . The communication device according to claim 12 , wherein in a case that a network device does not configure the second DCI for a terminal, a behavior of the terminal comprises one of following:

determining that an error occurs on the first DCI;

skipping monitoring the first DCI; or

monitoring the first DCI, the third bit number being equal to the first bit number.

16 . A non-transitory computer-readable storage medium, storing a computer program, wherein the computer program, when executed by a processor of a terminal, causes the terminal to perform:

obtaining a first bit number of first down control information (DCI), wherein the first DCI is sidelink downlink control information (SL DCI);

determining a third bit number of the first DCI according to the first bit number and a second bit number of second DCI; and

performing transmission of the first DCI according to the third bit number; wherein

the second DCI comprises target DCI in Uu DCI corresponding to a first object; and

the first object is a Uu cell or carrier for transmission of the first DCI.

17 . The method according to claim 1 , wherein the bit number of the target DCI is larger than the first bit number and closest to the first bit number.

18 . The communication device according to claim 12 , wherein the bit number of the target DCI is larger than the first bit number and closest to the first bit number.

19 . The non-transitory computer-readable storage medium according to claim 16 , wherein the bit number of the target DCI is larger than the first bit number and closest to the first bit number.