Resource allocation method and apparatus, base station, and user equipment

1. A resource allocation method, applied to a base station, comprising:

transmitting downlink control information (DCI) comprising resource allocation indication information to user equipment (UE), wherein the resource allocation indication information is used for indicating a resource location of a frequency domain resource allocated to the UE, and the frequency domain resource is allocated by using a virtual resource block (VRB) group as allocation granularity;

wherein the method further comprises:

determining a size of the VRB group based on a size of an activated bandwidth part (BWP) and a predetermined correspondence between activated BWP sizes and VRB group sizes.

2. The resource allocation method according to claim 1 , further comprising:

informing the UE of a size of the VRB group by using higher layer signaling or Layer 1 (L1) signaling carried in a group common physical downlink control channel (PDCCH).

3. The resource allocation method according to claim 1 , further comprising: determining a quantity of bits of the resource allocation indication information by using Formula 1 or Formula 2:

┌log 2 (└ N RB DL,BWP /G ┘(└ N RB DL,BWP /G┘+ 1)/2)┐,  Formula 1

┌log 2 (┌ N RB DL,BWP /G ┐(┌ N RB DL,BWP /G┐+ 1)/2)┐,  Formula 2

where G is the size of the VRB group, N RB DL,BWP is a quantity of physical resource blocks (PRBs) or VRBs in the activated bandwidth part (BWP), and G is an integer greater than or equal to 1.

4. A base station, comprising a storage, a processor, a transceiver, and a computer program stored in the storage and configured to be executed by the processor, wherein the transceiver is configured to implement the steps in the resource allocation method according to claim 1 .

5. The base station according to claim 4 , wherein the transceiver is further configured to:

inform the UE of a size of the VRB group by using higher layer signaling or Layer 1 (L1) signaling carried in a group common physical downlink control channel (PDCCH).

6. The base station according to claim 4 , wherein the processor is configured to determine a quantity of bits of the resource allocation indication information by using Formula 1 or Formula 2:

┌log 2 (└ N RB DL,BWP /G ┘(└ N RB DL,BWP /G┘+ 1)/2)┐,  Formula 1

┌log 2 (┌ N RB DL,BWP /G ┐(┌ N RB DL,BWP /G┐+ 1)/2)┐,  Formula 2

wherein G is a size of the VRB group, N RB DL,BWP is a quantity of physical resource blocks (PRBs) or VRBs in the activated bandwidth part (BWP), and G is an integer greater than or equal to 1.

7. A non-transitory computer-readable storage medium, storing therein a computer program, wherein the computer program is configured to be executed by a processor, to implement the steps in the resource allocation method according to claim 1 .

8. A resource allocation method, applied to user equipment (UE), comprising:

receiving downlink control information (DCI) that is transmitted by a base station and comprises resource allocation indication information, wherein the resource allocation indication information is used for indicating a resource location of a frequency domain resource allocated to the UE, and the frequency domain resource is allocated by using a virtual resource block (VRB) group as allocation granularity; and

determining, according to the resource allocation indication information, the frequency domain resource allocated by the base station to the UE;

wherein the method further comprises:

determining a size of the VRB group based on a size of an activated bandwidth part (BWP) and a predetermined correspondence between activated BWP sizes and VRB group sizes.

9. The resource allocation method according to claim 8 , further comprising:

acquiring, by using higher layer signaling or Layer 1 (L1) signaling carried in a group common physical downlink control channel (PDCCH), a size of the VRB group indicated by the base station.

10. The resource allocation method according to claim 8 , wherein the determining, according to the resource allocation indication information, the frequency domain resource allocated by the base station to the UE comprises:

determining a quantity of bits of the resource allocation indication information according to the size of the VRB group and the size of the activated bandwidth part (BWP); and

determining, according to the resource allocation indication information, a VRB group allocated by the base station.

11. The resource allocation method according to claim 10 , wherein in the determining the quantity of bits of the resource allocation indication information according to the size of the VRB group and the size of the activated BWP, the quantity of bits of the resource allocation indication information is determined by using Formula 1 or Formula 2:

┌log 2 (└ N RB DL,BWP /G ┘(└ N RB DL,BWP /G┘+ 1)/2)┐,  Formula 1

┌log 2 (┌ N RB DL,BWP /G ┐(┌ N RB DL,BWP /G┐+ 1)/2)┐,  Formula 2

where G is the size of the VRB group, N RB DL,BWP is a quantity of physical resource blocks (PRBs) or VRBs in the activated BWP, and G is an integer greater than or equal to 1.

12. A non-transitory computer-readable storage medium, storing therein a computer program, wherein the computer program is configured to be executed by a processor, to implement the steps in the resource allocation method according to claim 8 .

13. User equipment (UE), comprising a storage, a processor, a transceiver, and a computer program stored in the storage and configured to be executed by the processor, wherein

the transceiver is configured to receive downlink control information (DCI) that is transmitted by a base station and comprises resource allocation indication information, wherein the resource allocation indication information is used for indicating a resource location of a frequency domain resource allocated to the UE, and the frequency domain resource is allocated by using a virtual resource block (VRB) group as allocation granularity; and

the processor is configured to determine, according to the resource allocation indication information, the frequency domain resource allocated by the base station to the UE;

wherein the processor is further configured to:

determine a size of the VRB group based on a size of an activated bandwidth part (BWP) and a predetermined correspondence between activated BWP sizes and VRB group sizes.

14. The UE according to claim 13 , wherein the transceiver is further configured to:

acquire, by using higher layer signaling or Layer 1 (L1) signaling carried in a group common physical downlink control channel (PDCCH), a size of the VRB group indicated by the base station.

15. The UE according to claim 13 , wherein the processor is further configured to:

determine a quantity of bits of the resource allocation indication information according to the size of the VRB group and the size of the activated bandwidth part (BWP); and

determine, according to the resource allocation indication information, a VRB group allocated by the base station.

16. The UE according to claim 15 , wherein the processor is configured to determine the quantity of bits of the resource allocation indication information by using Formula 1 or Formula 2:

┌log 2 (└ N RB DL,BWP /G ┘(└ N RB DL,BWP /G┘+ 1)/2)┐,  Formula 1

┌log 2 (┌ N RB DL,BWP /G ┐(┌ N RB DL,BWP /G┐+ 1)/2)┐,  Formula 2

wherein G is the size of the VRB group, N RB DL,BWP is a quantity of physical resource blocks (PRBs) or VRBs in the activated BWP, and G is an integer greater than or equal to 1.