Control information transmission method, base station, and user equipment

1. A control information communication method using downlink control information (DCI) format 6-2 for paging and for multicast, the method comprising:

formatting a DCI using the DCI format 6-2;

scrambling the DCI by a paging radio network temporary identifier (P-RNTI) based on the DCI being used for paging; and

scrambling the DCI by a single cell radio network temporary identifier (SC-RNTI) based on the DCI being used for multicast,

wherein the DCI used for multicast comprises indication information and scheduling information,

wherein the indication information is used to indicate whether a multicast control channel is updated,

wherein the scheduling information is used to schedule a multicast control channel,

wherein the scheduling information comprises information about (1) resource block allocation of the multicast control channel, (2) a modulation and coding scheme of the multicast control channel, (3) a quantity of repetitions of the multicast control channel, and (4) a quantity of repetitions of the DCI,

wherein the information about the resource block allocation of the multicast control channel occupies

⌈

log

2

⁢

⌊

N

RB

DL

6

⌋

⌉

bit positions in the DCI format 6-2,

wherein the information about the modulation and coding scheme of the multicast control channel occupies three bit positions in the DCI format 6-2,

wherein the information about the quantity of repetitions of the multicast control channel occupies three bit positions in the DCI format 6-2,

wherein the information about the quantity of repetitions of the DCI occupies two bit positions in the DCI format 6-2,

wherein N RB DL refers to a quantity of resource blocks included in a downlink bandwidth,

wherein the resource block allocation in the DCI indicates a narrowband of a single-cell multicast control channel (SC-MCCH) transmission, and

wherein a narrowband of a single-cell multicast traffic channel (SC-MTCH) transmission is determined based on the narrowband of the SC-MCCH transmission; and

sending the DCI to user equipment.

2. The method according to claim 1 , wherein the indication information occupies one bit.

3. The method according to claim 2 , wherein the bit with a state of 1 indicates that the multicast control channel is updated or the bit with a state of 0 indicates that the multicast control channel is not updated.

4. A control information communication method comprising:

receiving, by using downlink control information (DCI) format 6-2, a DCI from a base station, wherein the DCI format 6-2 is used for paging and for multicast; and

determining whether the DCI is used for paging or for multicast,

wherein the DCI is determined to be used for paging based on the DCI being scrambled by a paging radio network temporary identifier (P-RNTI),

wherein the DCI is determined to be used for multicast based on the DCI being scrambled by a single cell radio network temporary identifier (SC-RNTI),

wherein the DCI used for multicast comprises indication information and scheduling information,

wherein the indication information is used to indicate whether a multicast control channel is updated,

wherein the scheduling information is used to schedule a multicast control channel,

wherein the scheduling information comprises information about (1) resource block allocation of the multicast control channel, (2) a modulation and coding scheme of the multicast control channel, (3) a quantity of repetitions of the multicast control channel, and (4) a quantity of repetitions of the DCI,

wherein the information about the resource block allocation of the multicast control channel occupies

⌈

log

2

⁢

⌊

N

RB

DL

6

⌋

⌉

bit positions in the DCI format 6-2,

wherein the information about the modulation and coding scheme of the multicast control channel occupies three bit positions in the DCI format 6-2,

wherein the information about the quantity of repetitions of the multicast control channel occupies three bit positions in the DCI format 6-2,

wherein the information about the quantity of repetitions of the DCI occupies two bit positions in the DCI format 6-2,

wherein N RB DL refers to a quantity of resource blocks included in a downlink bandwidth,

wherein the resource block allocation in the DCI indicates a narrowband of a single-cell multicast control channel (SC-MCCH) transmission, and

wherein a narrowband of a single-cell multicast traffic channel (SC-MTCH) transmission is determined based on the narrowband of the SC-MCCH transmission.

5. The method according to claim 4 , wherein the indication information occupies one bit.

6. The method according to claim 5 , wherein the bit with a state of 1 indicates that the multicast control channel is updated or the bit with a state of 0 indicates that the multicast control channel is not updated.

7. An apparatus comprising at least one processor, a memory storing executable instructions for execution by the at least one processor, a receiver and a transmitter, wherein when the at least one processor executes the instructions, the at least one processor cooperates with the receiver and transmitter to provide at least the following operations:

formatting a downlink control information (DCI) using a DCI format 6-2;

scrambling the DCI by a paging radio network temporary identifier (P-RNTI) based on the DCI being used for paging; and

scrambling the DCI by a single cell radio network temporary identifier (SC-RNTI) based on the DCI being used for multicast,

wherein the DCI used for multicast comprises indication information and scheduling information,

wherein the indication information is used to indicate whether a multicast control channel is updated,

wherein the scheduling information is used to schedule a multicast control channel,

wherein the scheduling information comprises information about (1) resource block allocation of the multicast control channel, (2) a modulation and coding scheme of the multicast control channel, (3) a quantity of repetitions of the multicast control channel, and (4) a quantity of repetitions of the DCI,

wherein the information about the resource block allocation of the multicast control channel occupies

⌈

log

2

⁢

⌊

N

R

⁢

B

D

⁢

L

6

⌋

⌉

bit positions in the DCI format 6-2,

wherein the information about the modulation and coding scheme of the multicast control channel occupies three bit positions in the DCI format 6-2,

wherein the information about the quantity of repetitions of the multicast control channel occupies three bit positions in the DCI format 6-2,

wherein the information about the quantity of repetitions of the DCI occupies two bit positions in the DCI format 6-2,

wherein N RB DL refers to a quantity of resource blocks included in a downlink bandwidth,

wherein the resource block allocation in the DCI indicates a narrowband of a single-cell multicast control channel (SC-MCCH) transmission, and

wherein a narrowband of a single-cell multicast traffic channel (SC-MTCH) transmission is determined based on the narrowband of the SC-MCCH transmission; and

sending the DCI to user equipment.

8. The apparatus according to claim 7 , wherein the indication information occupies one bit.

9. The apparatus according to claim 8 , wherein the bit with a state of 1 indicates that the multicast control channel is updated or the bit with a state of 0 indicates that the multicast control channel is not updated.

10. A non-transitory computer-readable storage medium comprising instructions which, when executed by a base station, cause the base station to carry out the method according to claim 1 .

11. A non-transitory computer-readable storage medium comprising instructions which, when executed by a user equipment, cause the user equipment to carry out the method according to claim 4 .