Method for determining transmission bandwidth, device and storage medium

1. A method for determining a transmission bandwidth, comprising:

receiving, by a terminal device, first indication information sent by a network device; and

determining, by the terminal device according to the first indication information, one or more sub-bands on an unlicensed carrier that are used for communication, wherein the unlicensed carrier comprises at least two sub-bands,

wherein the first indication information is used to determine the sub-band with a smallest index in a first sub-band and a number of sub-bands included in the first sub-band, wherein the first sub-band comprises sub-bands used for communication among the sub-bands comprised in a first bandwidth part (BWP) of the terminal device.

2. The method according to claim 1 , wherein the receiving, by the terminal device, the first indication information sent by the network device comprises:

receiving, by the terminal device, a PDCCH sent by the network device, the PDCCH comprising the first indication information; and

determining the first indication information by the terminal device according to the PDCCH.

3. The method according to claim 2 , wherein the PDCCH comprising the first indication information comprises a situation where:

Downlink Control Information (DCI) transmitted in the PDCCH comprises the first indication information.

4. The method according to claim 2 , wherein the PDCCH comprises at least one of the following situations where:

the PDCCH is scrambled according to the RNTI common to a group; and

the PDCCH is scrambled according to the RNTI specific to the terminal device.

5. The method according to claim 1 , wherein the first BWP comprises N sub-bands, an index of the sub-band with the smallest index in the first sub-band is S, the number of the sub-bands included in the first sub-band is L, and the value of the first indication information is R, and

R=N *( L− 1)+ S , if ( L− 1)≤floor( N/ 2); otherwise,

R=N *( N−L+ 1)+( N− 1− S ),

wherein floor represents round down, L≥1 and L is not greater than N−S, 0≤S≤N−1.

6. The method according to claim 5 , wherein a number of states included in the first indication information is N*(N+1)/2.

7. The method according to claim 1 , wherein when the sub-bands for which channel usage right is obtained are less than the sub-bands included in the unlicensed carrier, part of sub-bands which are continuous and for which the channel usage right is obtained are used for transmission.

8. A terminal device, comprising:

a memory which stores computer-executable instructions;

a receiver configured to receive first indication information sent by a network device; and

a processor configured to execute the computer-executable instructions stored in the memory to cause the processor to determine, according to the first indication information, one or more sub-bands on an unlicensed carrier that are used for communication, wherein the unlicensed carrier comprises at least two sub-bands,

wherein the first indication information is used to determine the sub-band with a smallest index in a first sub-band and a number of sub-bands included in the first sub-band, wherein the first sub-band comprises sub-bands used for communication among the sub-bands comprised in a first bandwidth part (BWP) of the terminal device.

9. The terminal device according to claim 8 , wherein:

the receiver is further configured to receive a PDCCH sent by the network device, the PDCCH comprising the first indication information; and

the processor is further configured to determine the first indication information according to the PDCCH.

10. The terminal device according to claim 9 , wherein the PDCCH comprising the first indication information comprises a situation where Downlink Control Information (DCI) transmitted in the PDCCH comprises the first indication information.

11. The terminal device according to claim 9 , wherein the PDCCH comprises at least one of the following situations where:

the PDCCH is scrambled according to the RNTI common to a group; and

the PDCCH is scrambled according to the RNTI specific to the terminal device.

12. The terminal device according to claim 8 , wherein the first BWP comprises N sub-bands, an index of the sub-band with the smallest index in the first sub-band is S, the number of the sub-bands included in the first sub-band is L, and the value of the first indication information is R, and

R=N *( L− 1)+ S , if ( L− 1)≤floor( N/ 2); otherwise,

R=N *( N−L+ 1)+( N− 1− S ),

wherein floor represents round down, L≥1 and L is not greater than N−S, 0≤S≤N−1.

13. The terminal device according to claim 12 , wherein a number of states included in the first indication information is N*(N+1)/2.

14. The terminal device according to claim 8 , wherein when the sub-bands for which channel usage right is obtained are less than the sub-bands included in the unlicensed carrier, part of sub-bands which are continuous and for which the channel usage right is obtained are used for transmission.

15. A network device, comprising:

a transmitter configured to send first indication information to a terminal device, the first indication information being used for the terminal device to determine one or more sub-bands on an unlicensed carrier that are used for communication, wherein the unlicensed carrier comprises at least two sub-bands,

wherein the first indication information is used to determine the sub-band with a smallest index in a first sub-band and a number of sub-bands included in the first sub-band, wherein the first sub-band comprises sub-bands used for communication among the sub-bands comprised in a first bandwidth part (BWP) of the terminal device.

16. The network device according to claim 15 , wherein the transmitter is configured to:

send a PDCCH to the terminal device, the PDCCH comprising the first indication information.