Communication method and apparatus
This application relates to the field of communication technologies, and provides a communication method and apparatus. The method includes: A terminal device receives first downlink control information DCI from a network device through a first physical downlink control channel PDCCH. The first DCI includes a first time domain resource assignment TDRA indicator field, and the first TDRA indicator field is used to indicate a first time domain resource. The terminal device receives or sends data on a second time domain resource after determining the second time domain resource based on a time domain position of the first PDCCH and the first time domain resource. The first time domain resource is different from the second time domain resource. The method is applied to a time domain resource assignment process of the data scheduling.
1. A communication method, comprising:
receiving first downlink control information (DCI) from a network device through a first physical downlink control channel (PDCCH), wherein the first DCI comprises a first time domain resource assignment (TDRA) indicator field, and the first TDRA indicator field indicates a first time domain resource;
determining a second time domain resource based on a time domain position of the first PDCCH and the first time domain resource, wherein the first time domain resource is different from the second time domain resource, and wherein determining the second time domain resource based on the time domain position of the first PDCCH and the first time domain resource comprises:
determining the second time domain resource based on an end symbol position of the first PDCCH when the end symbol position of the first PDCCH overlaps the first time domain resource; and
receiving or sending data on the second time domain resource.
2. The method according to claim 1 , wherein there is an offset between a start symbol position of the second time domain resource and the end symbol position of the first PDCCH.
3. The method according to claim 1 , wherein an allocation length of the second time domain resource is less than or equal to an allocation length of the first time domain resource.
4. The method according to claim 1 , further comprising:
receiving first indication information from the network device; and
wherein determining the second time domain resource based on the time domain position of the first PDCCH and the first time domain resource further comprises:
determining the second time domain resource based on the first indication information, the time domain position of the first PDCCH, and the first time domain resource.
5. The method according to claim 1 , further comprising:
receiving first configuration information from the network device, wherein the first configuration information is used to configure a plurality of search spaces; and
receiving second indication information from the network device, wherein the second indication information indicates at least one search space in the plurality of search spaces; and
wherein receiving the first DCI from the network device through the first PDCCH comprises:
receiving the first DCI from the network device through the first PDCCH in the at least one search space.
6. The method according to claim 5 , wherein the second indication information further indicates at least one of information about a serving cell or information about a bandwidth part (BWP).
7. The method according to claim 5 , wherein the second indication information further indicates information about a serving cell.
8. The method according to claim 1 , wherein an allocation length of the second time domain resource is less than an allocation length of the first time domain resource.
9. The method according to claim 1 , wherein an allocation length of the second time domain resource is equal to an allocation length of the first time domain resource.
10. An apparatus, comprising:
one or more processors; and
a non-transitory memory coupled to the one or more processors, wherein the non-transitory memory stores instructions to be executed by the one or more processors, and wherein the instructions, when executed by the one or more processors, instruct the one or more processors to perform operations comprising:
receiving first downlink control information (DCI) from a network device through a first physical downlink control channel (PDCCH), wherein the first DCI comprises a first time domain resource assignment (TDRA) indicator field, and the first TDRA indicator field indicates a first time domain resource;
determining a second time domain resource based on a time domain position of the first PDCCH and the first time domain resource, wherein the first time domain resource is different from the second time domain resource, and wherein determining the second time domain resource based on the time domain position of the first PDCCH and the first time domain resource comprises:
determining the second time domain resource based on an end symbol position of the first PDCCH when the end symbol position of the first PDCCH overlaps the first time domain resource; and
receiving or sending data on the second time domain resource.
11. The apparatus according to claim 10 , wherein there is an offset between a start symbol position of the second time domain resource and the end symbol position of the first PDCCH.
12. The apparatus according to claim 10 , wherein an allocation length of the second time domain resource is less than or equal to an allocation length of the first time domain resource.
13. The apparatus according to claim 10 , wherein the non-transitory memory further stores instructions for receiving first indication information from the network device; and
wherein determining the second time domain resource based on the time domain position of the first PDCCH and the first time domain resource further comprises:
determining the second time domain resource based on the first indication information, the time domain position of the first PDCCH, and the first time domain resource.
14. The apparatus according to claim 10 , wherein the non-transitory memory further stores instructions for:
receiving first configuration information from the network device, wherein the first configuration information is used to configure a plurality of search spaces; and
receiving second indication information from the network device, wherein the second indication information indicates at least one search space in the plurality of search spaces; and
wherein receiving the first DCI from the network device through the first PDCCH comprises:
receiving the first DCI from the network device through the first PDCCH in the at least one search space.
15. The apparatus according to claim 14 , wherein the second indication information further indicates at least one of information about a serving cell or information about a bandwidth part (BWP).
16. A non-transitory computer readable medium storing instructions that, when executed by one or more processors, instructs the one or more processors to perform operations comprising:
receiving first downlink control information (DCI) from a network device through a first physical downlink control channel (PDCCH), wherein the first DCI comprises a first time domain resource assignment (TDRA) indicator field, and the first TDRA indicator field indicates a first time domain resource;
determining a second time domain resource based on a time domain position of the first PDCCH and the first time domain resource, wherein the first time domain resource is different from the second time domain resource, and wherein determining the second time domain resource based on the time domain position of the first PDCCH and the first time domain resource comprises:
determining the second time domain resource based on an end symbol position of the first PDCCH when the end symbol position of the first PDCCH overlaps the first time domain resource; and
receiving or sending data on the second time domain resource.
17. The non-transitory computer readable medium according to claim 16 , wherein an allocation length of the second time domain resource is less than or equal to an allocation length of the first time domain resource.
18. The non-transitory computer readable medium according to claim 16 , wherein the non-transitory computer readable medium further stores instructions for receiving first indication information from the network device; and
wherein determining the second time domain resource based on the time domain position of the first PDCCH and the first time domain resource further comprises:
determining the second time domain resource based on the first indication information, the time domain position of the first PDCCH, and the first time domain resource.
19. The non-transitory computer readable medium according to claim 16 , wherein the non-transitory computer readable medium further stores instructions for:
receiving first configuration information from the network device, wherein the first configuration information is used to configure a plurality of search spaces; and
receiving second indication information from the network device, wherein the second indication information indicates at least one search space in the plurality of search spaces; and
wherein receiving the first DCI from the network device through the first PDCCH comprises:
receiving the first DCI from the network device through the first PDCCH in the at least one search space.
20. The non-transitory computer readable medium according to claim 19 , wherein the second indication information further indicates at least one of information about a serving cell or information about a bandwidth part (BWP).