Method and device for beam determination for DRX, UE and network device

1. A method for beam determination for Discontinuous reception (DRX), comprising:

measuring, by User Equipment (UE), a plurality of Channel State Information Reference Signal (CSI-RS) resources in a given slot in a DRX on duration, wherein the given slot is a first slot in the DRX on duration; and

determining, by the UE, at least one of a transmitting beam for a Physical Downlink Control Channel (PDCCH) or a transmitting beam for a Physical Uplink Control Channel (PUCCH), based on measurement quantities.

2. The method of claim 1 , further comprising:

receiving, by the UE, first configuration information and second configuration information from a network device, the first configuration information being used to determine a DRX configuration and the second configuration information being used to determine configuration of the plurality of CSI-RS resources;

wherein the DRX configuration comprises configuration of a long DRX cycle, and the long DRX cycle is associated with the plurality of CSI-RS resources.

3. The method of claim 2 , wherein each of the plurality of CSI-RS resources is associated with a Physical Random Access Channel (PRACH) preamble and a PRACH resource occasion.

4. The method of claim 3 , wherein the plurality of CSI-RS resources correspond to different transmitting beams; and

determining, by the UE, the at least one of the transmitting beam for the PDCCH or the transmitting beam for the PUCCH, based on the measurement quantities comprises:

selecting, by the UE, a first CSI-RS resource from the plurality of CSI-RS resources based on the measurement quantities, wherein the first CSI-RS resource is associated with a first PRACH preamble and a first PRACH resource occasion; and

transmitting, by the UE, the first PRACH preamble on the first PRACH resource occasion, and determine at least one of: the transmitting beam for the PDCCH is the same as a transmitting beam for the first CSI-RS resource or the transmitting beam for the PUCCH is the same as a transmitting beam for the first PRACH preamble.

5. The method of claim 4 , wherein selecting, by the UE, the first CSI-RS resource from the plurality of CSI-RS resources based on the measurement quantities comprises:

selecting, by the UE, as the first CSI-RS resource, a CSI-RS resource with a highest signal quality from the plurality of CSI-RS resources.

6. The method of claim 2 , wherein the plurality of CSI-RS resources correspond to a same transmitting beam; and

measuring, by the UE, the plurality of CSI-RS resources in the given slot in the DRX on duration comprises:

measuring, by the UE, through beam sweeping, the plurality of CSI-RS resources in the given slot in the DRX on duration, wherein the beam sweeping indicates that the UE receives different CSI-RS resources through different receiving beams among a plurality of receiving beams.

7. The method of claim 6 , wherein determining, by the UE, the at least one of the transmitting beam for the PDCCH or the transmitting beam for the PUCCH, based on the measurement quantities comprises:

selecting, by the UE, a first receiving beam from the plurality of receiving beams based on the measurement quantities; and

determining, by the UE, at least one of: the transmitting beam for the PDCCH is the same as the transmitting beam for the plurality of CSI-RS resources or the transmitting beam for the PUCCH corresponds to the first receiving beam.

8. The method of claim 7 , wherein selecting, by the UE, the first receiving beam from the plurality of receiving beams based on the measurement quantities comprises:

selecting, by the UE, as the first receiving beam, a receiving beam with a highest signal quality from the plurality of receiving beams.

9. The method of claim 1 , further comprising:

receiving, by the UE, a first Downlink Control Information (DCI) format, the first DCI format being used to indicate that the plurality of CSI-RS resources are transmitted in the DRX on duration.

10. A device for beam determination for Discontinuous reception (DRX), for use in User Equipment (UE), comprising:

a processor; and

a memory, storing computer program comprising instructions that, when executed by the processor, cause the processor to:

measure a plurality of Channel State Information Reference Signal (CSI-RS) resources in a given slot in a DRX on duration, wherein the given slot is a first slot in the DRX on duration; and

determine, based on measurement quantities, at least one of a transmitting beam for a Physical Downlink Control Channel (PDCCH) or a transmitting beam for a Physical Uplink Control Channel (PUCCH).

11. The device of claim 10 , further comprising:

a transceiver, configured to receive first configuration information and second configuration information from a network device, the first configuration information being used to determine a DRX configuration and the second configuration information being used to determine configuration of the plurality of CSI-RS resources;

wherein the DRX configuration comprises configuration of a long DRX cycle, and the long DRX cycle is associated with the plurality of CSI-RS resources.

12. The device of claim 11 , wherein each of the plurality of CSI-RS resources is associated with a Physical Random Access Channel (PRACH) preamble and a PRACH resource occasion.

13. The device of claim 12 , wherein the plurality of CSI-RS resources correspond to different transmitting beams; and

wherein the processor is configured to select a first CSI-RS resource from the plurality of CSI-RS resources based on the measurement quantities, wherein the first CSI-RS resource is associated with a first PRACH preamble and a first PRACH resource occasion;

the transceiver is configured to transmit the first PRACH preamble on the first PRACH resource occasion; and

the processor is configured to determine at least one of: the transmitting beam for the PDCCH is the same as a transmitting beam for the first CSI-RS resource or the transmitting beam for the PUCCH is the same as a transmitting beam for the first PRACH preamble.

14. The device of claim 13 , wherein the processor is configured to select, as the first CSI-RS resource, a CSI-RS resource with a highest signal quality from the plurality of CSI-RS resources.

15. The device of claim 11 , wherein the plurality of CSI-RS resources correspond to a same transmitting beam; and

the processor is configured to measure, through beam sweeping, the plurality of CSI-RS resources in the given slot in the DRX on duration, wherein the beam sweeping indicates that the UE receives different CSI-RS resources through different receiving beams among a plurality of receiving beams.

16. The device of claim 15 , wherein

the processor is configured to select a first receiving beam from the plurality of receiving beams based on the measurement quantities; and determine at least one of: the transmitting beam for the PDCCH is the same as the transmitting beam for the plurality of CSI-RS resources or the transmitting beam for the PUCCH corresponds to the first receiving beam.

17. The device of claim 16 , wherein the processor is configured to select, as the first receiving beam, a receiving beam with a highest signal quality from the plurality of receiving beams.

18. The device of claim 10 , further comprising:

a transceiver, configured to receive a first Downlink Control Information (DCI) format, the first DCI format being used to indicate that the plurality of CSI-RS resources are transmitted in the DRX on duration.

19. The method of claim 1 , wherein the given slot is configured by a network device, or preconfigured, or specified by a protocol.

20. The device of claim 10 , wherein the given slot is configured by a network device, or preconfigured, or specified by a protocol.