Communication method, and related apparatus and device
The present disclosure relates to communication methods, apparatus, and devices. In one example method, a terminal device receives first indication information, where the first indication information indicates a first frequency domain resource, the first frequency domain resource is a subset of a frequency domain resource corresponding to a first bandwidth part (BWP), and the first BWP is a dedicated BWP of the terminal device. The terminal device receives a first physical downlink control channel (PDCCH) on the first BWP, where the first PDCCH is scrambled by using a group-radio network temporary identifier (G-RNTI), and the first PDCCH schedules a first physical downlink shared channel (PDSCH) within a range of the first frequency domain resource. The terminal device receives second indication information including a first frequency domain width. The terminal device receives the first PDSCH on the first frequency domain resource.
1. A communication method, comprising:
receiving, by a terminal device, first indication information, wherein the first indication information indicates a first frequency domain resource, the first frequency domain resource is a subset of a frequency domain resource corresponding to a first bandwidth part (BWP), and the first BWP is a dedicated BWP of the terminal device;
receiving, by the terminal device, a first physical downlink control channel (PDCCH) on the first BWP, wherein the first PDCCH is scrambled by using a group-radio network temporary identifier (G-RNTI), the first PDCCH scrambled by using the G-RNTI is a PDCCH for broadcast, multicast, or groupcast transmission, and the first PDCCH schedules a first physical downlink shared channel (PDSCH) within a range of the first frequency domain resource;
receiving, by the terminal device, second indication information, wherein the second indication information comprises a first frequency domain width, the first frequency domain width is for determining a second frequency domain resource, and a starting frequency domain position of the second frequency domain resource is a resource block (RB) with a smallest sequence number in a control resource set or a predefined BWP for receiving the first PDCCH; and
receiving, by the terminal device, the first PDSCH on the first frequency domain resource.
2. The method according to claim 1 , wherein receiving, by the terminal device, the first PDCCH on the first BWP comprises:
receiving, by the terminal device, the first PDCCH on the first frequency domain resource.
3. The method according to claim 1 , wherein before receiving, by the terminal device, the first PDCCH on the first BWP, the method further comprises:
receiving, by the terminal device, third indication information, wherein the third indication information indicates a format of downlink control information (DCI) carried on the first PDCCH, and the format of the DCI carried on the first PDCCH is non-fallback DCI.
4. The method according to claim 1 , wherein the first indication information comprises at least one of a starting frequency domain position, a frequency domain width, or a numerology of the first frequency domain resource, the numerology comprises a subcarrier spacing and a cyclic prefix, and the numerology of the first frequency domain resource is the same as a numerology of the first BWP.
5. The method according to claim 1 , wherein the first frequency domain width is a quantity of contiguous RBs corresponding to a control resource set (CORESET) 0.
6. The method according to claim 1 , wherein the first PDCCH is sent to a plurality of terminal devices in a group, and the plurality of terminal devices in the group includes the terminal device.
7. A communication method, comprising:
sending, by a network device, first indication information, wherein the first indication information indicates a first frequency domain resource, the first frequency domain resource is a subset of a frequency domain resource corresponding to a first bandwidth part (BWP), and the first BWP is a dedicated BWP of a terminal device;
sending, by the network device, a first physical downlink control channel (PDCCH), wherein the first PDCCH is scrambled by using a group-radio network temporary identifier (G-RNTI), the first PDCCH scrambled by using the G-RNTI is a PDCCH for broadcast, multicast, or groupcast transmission, and the first PDCCH schedules a first physical downlink shared channel (PDSCH) within a range of the first frequency domain resource;
sending, by the network device, second indication information, wherein the second indication information comprises a first frequency domain width, the first frequency domain width is for determining a second frequency domain resource, and a starting frequency domain position of the second frequency domain resource is a resource block (RB) with a smallest sequence number in a control resource set or a predefined BWP for receiving the first PDCCH; and
sending, by the network device, the first PDSCH on the first frequency domain resource.
8. The method according to claim 7 , wherein sending, by the network device, the first PDCCH comprises:
sending, by the network device, the first PDCCH on the first frequency domain resource.
9. The method according to claim 7 , wherein before sending, by the network device, the first PDCCH, the method further comprises:
sending, by the network device, third indication information, wherein the third indication information indicates a format of downlink control information (DCI) carried on the first PDCCH, and the format of the DCI carried on the first PDCCH is non-fallback DCI.
10. The method according to claim 7 , wherein the first indication information comprises at least one of a starting frequency domain position, a frequency domain width, or a numerology of the first frequency domain resource, the numerology comprises a subcarrier spacing and a cyclic prefix, and the numerology of the first frequency domain resource is the same as a numerology of the first BWP.
11. The method according to claim 7 , wherein the first frequency domain width is a quantity of contiguous RBs corresponding to a control resource set (CORESET) 0.
12. A terminal device, comprising at least one processor, a transceiver, and a memory, wherein the memory stores programming instructions for execution by the at least one processor to perform operations comprising:
receiving first indication information, wherein the first indication information indicates a first frequency domain resource, the first frequency domain resource is a subset of a frequency domain resource corresponding to a first bandwidth part (BWP), and the first BWP is a dedicated BWP of the terminal device;
receiving a first physical downlink control channel (PDCCH) on the first BWP, wherein the first PDCCH is scrambled by using a group-radio network temporary identifier (G-RNTI), the first PDCCH scrambled by using the G-RNTI is a PDCCH for broadcast, multicast, or groupcast transmission, and the first PDCCH schedules a first physical downlink shared channel (PDSCH) within a range of the first frequency domain resource;
receiving second indication information, wherein the second indication information comprises a first frequency domain width, the first frequency domain width is for determining a second frequency domain resource, and a starting frequency domain position of the second frequency domain resource is a resource block (RB) with a smallest sequence number in a control resource set or a predefined BWP for receiving the first PDCCH; and
receiving the first PDSCH on the first frequency domain resource.
13. The terminal device according to claim 12 , the operations further comprising:
receiving the first PDCCH on the first frequency domain resource.
14. The terminal device according to claim 12 , the operations further comprising:
receiving third indication information, wherein the third indication information indicates a format of downlink control information (DCI) carried on the first PDCCH, and the format of the DCI carried on the first PDCCH is non-fallback DCI.
15. The terminal device according to claim 12 , wherein the first indication information comprises at least one of a starting frequency domain position, a frequency domain width, or a numerology of the first frequency domain resource, the numerology comprises a subcarrier spacing and a cyclic prefix, and the numerology of the first frequency domain resource is the same as a numerology of the first BWP.
16. The terminal device according to claim 12 , wherein the first frequency domain width is a quantity of contiguous RBs corresponding to a control resource set (CORESET) 0.
17. A network device, comprising at least one processor, a transceiver, and a memory, wherein the memory stores programming instructions for execution by the at least one processor to perform operations comprising:
sending first indication information, wherein the first indication information indicates a first frequency domain resource, the first frequency domain resource is a subset of a frequency domain resource corresponding to a first bandwidth part (BWP), and the first BWP is a dedicated BWP of a terminal device;
sending a first physical downlink control channel (PDCCH), wherein the first PDCCH is scrambled by using a group-radio network temporary identifier (G-RNTI), the first PDCCH scrambled by using the G-RNTI is a PDCCH for broadcast, multicast, or groupcast transmission, and the first PDCCH schedules a first physical downlink shared channel (PDSCH) within a range of the first frequency domain resource;
sending second indication information, wherein the second indication information comprises a first frequency domain width, the first frequency domain width is for determining a second frequency domain resource, and a starting frequency domain position of the second frequency domain resource is a resource block (RB) with a smallest sequence number in a control resource set or a predefined BWP for receiving the first PDCCH; and
sending the first PDSCH on the first frequency domain resource.
18. The network device according to claim 17 , the operations further comprising:
sending the first PDCCH on the first frequency domain resource.
19. The network device according to claim 17 , the operations further comprising:
sending third indication information, wherein the third indication information indicates a format of downlink control information (DCI) carried on the first PDCCH, and the format of the DCI carried on the first PDCCH is non-fallback DCI.
20. The network device according to claim 17 , wherein the first indication information comprises at least one of a starting frequency domain position, a frequency domain width, or a numerology of the first frequency domain resource, the numerology comprises a subcarrier spacing and a cyclic prefix, and the numerology of the first frequency domain resource is the same as a numerology of the first BWP.