Downlink control information receiving method and apparatus, and storage medium

1. A method for receiving downlink control information (DCI), the method being performed by a terminal and comprising:

receiving bandwidth part (BWP) configuration information transmitted by an access network device, the BWP configuration information configuring a target BWP located in an unlicensed spectrum and comprises m sub-bands, m being a positive integer greater than 1;

determining the m sub-bands of the target BWP according to the BWP configuration information;

monitoring a target sequence at a first time domain position on all or part of the m sub-bands respectively, wherein the first time domain position is one of a time-frequency position pre-determined by a communication protocol, or a time domain position pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is configured to identify sub-bands on which Listen Before Talk (LBT) is successful in the m sub-bands, or to identify sub-bands on which the DCI is transmitted in the m sub-bands; and

monitoring DCI on all or part of the m sub-bands after the target sequence is detected.

2. The method of claim 1 , wherein monitoring the DCI on all or part of the m sub-bands comprises:

monitoring the DCI on each of the m sub-bands.

3. The method of claim 1 , wherein monitoring the DCI on all or part of the m sub-bands comprises:

determining n target sub-bands on which the target sequence is detected, n being a positive integer not greater than m; and

monitoring the DCI on at least one of the n target sub-bands;

wherein the target sequence is transmitted by the access network device on the target sub-bands when the LBT is successful, or on a target sub-band transmitting the DCI.

4. The method of claim 3 , further comprising:

receiving a control resource set for the m sub-bands from the access network device;

wherein monitoring the DCI on at least one of the n target sub-bands comprises:

determining physical downlink control channel (PDCCH) search positions on the n target sub-bands according to the control resource set for the m sub-bands, the PDCCH search positions on the n target sub-bands having different frequency domain positions and same time domain position; and

monitoring the DCI at the PDCCH search positions.

5. The method of claim 1 , wherein the BWP configuration information is semi-static configuration information.

6. The method of claim 1 , wherein the m sub-bands are consecutive in a frequency domain.

7. A method for transmitting downlink control information (DCI), the method being performed by an access network device and comprising:

transmitting bandwidth part (BWP) configuration information to a terminal, the BWP configuration information configuring a target BWP located in an unlicensed spectrum and comprises m sub-bands, m being a positive integer greater than 1;

performing Listen Before Talk (LBT) on the m sub-bands, and determining n target sub-bands according to a LBT result, n being a positive integer not greater than m;

transmitting a target sequence at a first time domain position on the n target sub-bands respectively, wherein the first time domain position is one of a time-frequency position pre-determined by a communication protocol, or a time domain position pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is configured to identify sub-bands on which the LBT is successful in the m sub-bands, or to identify sub-bands on which the DCI is transmitted in the m sub-bands; and

transmitting DCI to the terminal on all or part of the m sub-bands.

8. The method of claim 7 , wherein determining the n target sub-bands according to the LBT result further comprises:

determining n sub-bands on which the LBT is successful as the n target sub-bands.

9. The method of claim 7 , wherein determining n target sub-bands according to a LBT result further comprises:

determining k sub-bands on which the LBT is successful, k being a positive integer not greater than m; and

determining the n target sub-bands for transmitting the DCI from the k sub-bands.

10. The method of claim 8 , wherein transmitting the DCI to the terminal on all or part of the m sub-bands comprises:

transmitting the DCI to the terminal on each of the m sub-bands.

11. The method of claim 8 , wherein transmitting the DCI to the terminal on all or part of the m sub-bands comprises:

transmitting the DCI to the terminal on all or part of the n target sub-bands.

12. The method of claim 9 , wherein transmitting the DCI to the terminal on all or part of the m sub-bands comprises:

transmitting the DCI to the terminal on each of the n target sub-bands, the DCI being configured to schedule a time-frequency resource on the k sub-bands.

13. The method of claim 7 , further comprising:

transmitting a control resource set for the m sub-bands to the terminal.

14. The method of claim 7 , wherein the m sub-bands are consecutive in a frequency domain.

15. An access network device, comprising:

a processor; and

a memory for storing instructions executable by the processor;

wherein the processor is configured to perform the method for transmitting the DCI of claim 7 .

16. A terminal, comprising:

a processor; and

a memory for storing instructions executable by the processor;

wherein the processor is configured to:

receive bandwidth part (BWP) configuration information transmitted by an access network device, the BWP configuration information configuring a target BWP located in an unlicensed spectrum and comprises m sub-bands, m being a positive integer greater than 1;

determine the m sub-bands of the target BWP according to the BWP configuration information;

monitor a target sequence at a first time domain position on all or part of the m sub-bands respectively, wherein the first time domain position is one of a time-frequency position pre-determined by a communication protocol, or a time domain position pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is configured to identify sub-bands on which Listen Before Talk (LBT) is successful in the m sub-bands, or to identify sub-bands on which the DCI is transmitted in the m sub-bands; and

monitor DCI on all or part of the m sub-bands after the target sequence is detected.