Reference signal sending method and apparatus, and reference signal receiving method and apparatus
A reference signal sending method and apparatus, and a reference signal receiving method and apparatus are provided. The method includes: determining, by a network device, a first configuration of a first reference signal and a second configuration of a second reference signal, where the first configuration includes a first subcarrier spacing, and the second configuration includes a second subcarrier spacing; and sending, by the network device on a first subband, the first reference signal meeting the first configuration, and sending, on a second subband, the second reference signal meeting the second configuration, where a parameter configuration of the first subband is different from a parameter configuration of the second subband.
1. A reference signal receiving method, comprising:
receiving, by a terminal on a first subband, a first reference signal meeting a first configuration, and receiving, on a second subband, a second reference signal meeting a second configuration, wherein the first configuration comprises a first subcarrier spacing, the second configuration comprises a second subcarrier spacing, and a parameter configuration of the first subband is different from a parameter configuration of the second subband; and
separately feeding back, by the terminal, channel quality based on the first reference signal and the second reference signal.
2. The method according to claim 1 , wherein the parameter configuration comprises one or more of:
a subcarrier spacing;
a carrier frequency;
a subband bandwidth;
a location of a subband in a system bandwidth; and
a cyclic prefix (CP) type.
3. The method according to claim 1 , wherein the first subcarrier spacing and the second subcarrier spacing are determined by using a subcarrier spacing of the first subband; or
the first subcarrier spacing is determined by using a subcarrier spacing of the first subband, and the second subcarrier spacing is determined by using a subcarrier spacing of the second subband.
4. The method according to claim 1 , wherein the first configuration further comprises a first pattern of the first reference signal, or a time-frequency location and a frequency domain location of the first reference signal, and the first pattern refers to a time domain location and a frequency domain location of the first reference signal on a fixed time-frequency resource.
5. The method according to claim 4 , wherein the first pattern comprises one or more of a zero power resource element RE and a non-zero power RE.
6. The method according to claim 1 , wherein the method further comprises:
receiving, by the terminal, a first switch identifier sent by the network device; and
determining, by the terminal based on the first switch identifier, whether to receive the first reference signal on the first subband.
7. The method according to claim 1 , wherein the first configuration further comprises a sending period of the first reference signal, and the second configuration further comprises a sending period of the second reference signal.
8. A reference signal sending apparatus, comprising:
a processing unit, configured to determine a first configuration of a first reference signal and a second configuration of a second reference signal, wherein the first configuration comprises a first subcarrier spacing, and the second configuration comprises a second subcarrier spacing; and
a transceiver unit, configured to: send, on a first subband, the first reference signal meeting the first configuration, and send, on a second subband, the second reference signal meeting the second configuration, wherein
a parameter configuration of the first subband is different from a parameter configuration of the second subband.
9. The apparatus according to claim 8 , wherein the parameter configuration comprises one or more of:
a subcarrier spacing;
a carrier frequency;
a subband bandwidth;
a location of a subband in a system bandwidth; and
a cyclic prefix (CP) type.
10. The apparatus according to claim 8 , wherein the processing unit is configured to:
determine the first subcarrier spacing and the second subcarrier spacing based on a subcarrier spacing of the first subband; or
determine the first subcarrier spacing based on a subcarrier spacing of the first subband, and determine the second subcarrier spacing based on a subcarrier spacing of the second subband.
11. The apparatus according to claim 8 , wherein the first configuration further comprises a first pattern of the first reference signal, or a time-frequency location and a frequency domain location of the first reference signal, and the first pattern refers to a time domain location and a frequency domain location of the first reference signal on a fixed time-frequency resource.
12. The apparatus according to claim 11 , wherein the processing unit is configured to:
determine a first pattern set that has a mapping relationship with the subcarrier spacing of the first subband and the first subcarrier spacing, and select a pattern from the first pattern set as the first pattern.
13. The apparatus according to claim 11 , wherein the first pattern comprises one or more of a zero power resource element RE and a non-zero power RE.
14. A reference signal receiving apparatus, comprising:
a transceiver unit, configured to: receive, on a first subband, a first reference signal meeting a first configuration, and receive, on a second subband, a second reference signal meeting a second configuration, wherein the first configuration comprises a first subcarrier spacing, the second configuration comprises a second subcarrier spacing, and a parameter configuration of the first subband is different from a parameter configuration of the second subband; and
a processing unit, configured to separately feed back channel quality based on the first reference signal and the second reference signal.
15. The apparatus according to claim 14 , wherein the parameter configuration comprises one or more of:
a subcarrier spacing;
a carrier frequency;
a subband bandwidth;
a location of a subband in a system bandwidth; and
a cyclic prefix (CP) type.
16. The apparatus according to claim 14 , wherein the first subcarrier spacing and the second subcarrier spacing are determined by using a subcarrier spacing of the first subband; or
the first subcarrier spacing is determined by using a subcarrier spacing of the first subband, and the second subcarrier spacing is determined by using a subcarrier spacing of the second subband.
17. The apparatus according to claim 14 , wherein the first configuration further comprises a first pattern of the first reference signal, or a time-frequency location and a frequency domain location of the first reference signal, and the first pattern refers to a time domain location and a frequency domain location of the first reference signal on a fixed time-frequency resource.
18. The apparatus according to claim 17 , wherein the first pattern comprises one or more of a zero power resource element RE and a non-zero power RE.
19. The apparatus according to claim 14 , wherein the transceiver unit is further configured to:
receive a first switch identifier sent by the network device; and
determine, based on the first switch identifier, whether to receive the first reference signal on the first subband.
20. The apparatus according to claim 14 , wherein the first configuration further comprises a sending period of the first reference signal, and the second configuration further comprises a sending period of the second reference signal.