Method and devices for determining resources
The present disclosure relates to communication methods. In one example method, a terminal device determines a first resource based on configuration information from a network device, where the first resource is a resource that cannot be used to transmit a downlink data channel and a demodulation reference signal of the downlink data channel. The terminal device determines a second resource based on downlink control information from the network device, where the second resource includes a resource used to transmit the downlink data channel and the demodulation reference signal of the downlink data channel. The terminal device determines a third resource based on the first resource and the second resource, where the third resource is a resource that is in the second resource and that is used to transmit the downlink data channel and the demodulation reference signal of the downlink data channel.
1. A communication method, wherein the method comprises:
receiving, by a terminal device in a wireless communication system, configuration information from a network device in the wireless communication system;
receiving, by the terminal device, downlink control information (DCI) from the network device;
determining, by the terminal device, a first resource based on the configuration information, wherein the first resource is a resource that cannot be used in the wireless communication system to transmit a downlink data channel and a demodulation reference signal (DMRS) of the downlink data channel;
determining, by the terminal device, a second resource based on the DCI, wherein the second resource comprises a resource used to transmit the downlink data channel and the DMRS of the downlink data channel;
determining, by the terminal device, a third resource based on the first resource and the second resource, wherein the third resource is used to transmit the downlink data channel and the DMRS of the downlink data channel, and the third resource is a resource in the second resource other than an intersection of the first resource and the second resource; and
receiving, by the terminal device on the third resource, the downlink data channel and the DMRS of the downlink data channel from the network device.
2. The method according to claim 1 , wherein the determining, by the terminal device, a first resource based on the configuration information comprises:
determining, by the terminal device, the first resource based on the configuration information and the DCI.
3. The method according to claim 1 , wherein the configuration information comprises indication information of a frequency domain resource in the first resource, and a time domain resource in the first resource comprises all time domain resources within a validity period of the first resource.
4. The method according to claim 1 , wherein the configuration information comprises indication information of a frequency domain resource in the first resource and indication information of a time domain resource in the first resource, and the indication information of the time domain resource is used to indicate that the time domain resource in the first resource comprises all time domain resources within a validity period of the first resource.
5. The method according to claim 1 , wherein the configuration information is represented by using M rate match patterns, and Mis a positive integer less than or equal to a first set value.
6. The method according to claim 5 , wherein a first rate match pattern in the M rate match patterns comprises S segments of frequency domain resources, and S is a positive integer less than or equal to a second set value.
7. The method according to claim 1 , wherein a frequency domain resource in the first resource is N segments of frequency domain resources, and N is a positive integer less than or equal to a third set value.
8. A terminal device, comprising at least one processor and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the terminal device in a wireless communication system to perform operations of:
receiving configuration information from a network device in the wireless communication system;
receiving downlink control information (DCI) from the network device;
determining a first resource based on the configuration information, wherein the first resource is a resource that cannot be used in the wireless communication system to transmit a downlink data channel and a demodulation reference signal (DMRS) of the downlink data channel;
determining a second resource based on the DCI, wherein the second resource comprises a resource used to transmit the downlink data channel and the DMRS of the downlink data channel;
determining a third resource based on the first resource and the second resource, wherein the third resource is used to transmit the downlink data channel and the DMRS of the downlink data channel, and the third resource is a resource in the second resource other than an intersection of the first resource and the second resource; and
receiving, on the third resource, the downlink data channel and the DMRS of the downlink data channel from the network device.
9. The device according to claim 8 , wherein the determining a first resource based on the configuration information comprises:
determining the first resource based on the configuration information and the DCI.
10. The device according to claim 8 , wherein the configuration information comprises indication information of a frequency domain resource in the first resource, and a time domain resource in the first resource comprises all time domain resources within a validity period of the first resource.
11. The device according to claim 8 , wherein the configuration information comprises indication information of a frequency domain resource in the first resource and indication information of a time domain resource in the first resource, and the indication information of the time domain resource is used to indicate that the time domain resource in the first resource comprises all time domain resources within a validity period of the first resource.
12. The device according to claim 8 , wherein the configuration information is represented by using M rate match patterns, and M is a positive integer less than or equal to a first set value.
13. The device according to claim 12 , wherein a first rate match pattern in the M rate match patterns comprises S segments of frequency domain resources, and S is a positive integer less than or equal to a second set value.
14. The device according to claim 8 , wherein a frequency domain resource in the first resource is N segments of frequency domain resources, and N is a positive integer less than or equal to a third set value.
15. A network device, comprising at least one processor and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the network device in a wireless communication system to perform operations of:
sending configuration information to a terminal device in the wireless communication system, wherein the configuration information is used to determine a first resource, and the first resource is a resource that cannot be used in the wireless communication system to transmit a downlink data channel and a demodulation reference signal (DMRS) of the downlink data channel;
sending downlink control information (DCI) to the terminal device, wherein the DCI is used to determine a second resource, and the second resource comprises a resource used to transmit the downlink data channel and the DMRS of the downlink data channel;
determining a third resource based on the first resource and the second resource, wherein the third resource is used to transmit the downlink data channel and the DMRS of the downlink data channel, and the third resource is a resource in the second resource other than an intersection of the first resource and the second resource; and
transmitting, on the third resource, the downlink data channel and the DMRS of the downlink data channel to the terminal device.
16. The device according to claim 15 , wherein the DCI is further used to determine the first resource.
17. The device according to claim 15 , wherein the configuration information comprises indication information of a frequency domain resource in the first resource, and a time domain resource in the first resource comprises all time domain resources within a validity period of the first resource.
18. The device according to claim 15 , wherein the configuration information comprises indication information of a frequency domain resource in the first resource and indication information of a time domain resource in the first resource, and the indication information of the time domain resource is used to indicate that the time domain resource in the first resource comprises all time domain resources within a validity period of the first resource.
19. The device according to claim 15 , wherein the configuration information is represented by using M rate match patterns, and M is a positive integer less than or equal to a first set value.
20. The device according to claim 19 , wherein a first rate match pattern in the M rate match patterns comprises S segments of frequency domain resources, and S is a positive integer less than or equal to a second set value.