Reference signal sending method, reference signal receiving method, network device, and terminal device
A reference signal sending or receiving method includes: determining, by the network device, a plurality of resource elements REs used to carry a first CSI-RS, where the plurality of REs are distributed in a plurality of resource units, and in each resource unit, a plurality of REs used to carry the first CSI-RS are located on a plurality of subcarriers in a same symbol, values of the first CSI-RS carried on at least two REs are different, and values of the first CSI-RS are loaded to the plurality of REs in the resource unit by using a first multiplex code; and sending, by the network device, the first CSI-RS to the terminal device by using the plurality of REs.
1. A reference signal sending method, comprising:
determining, by a network device, a plurality of resource elements (REs) for carrying a first channel state information reference signal (CSI-RS) of one CSI-RS port, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, values of the first CSI-RS carried on at least two REs in one symbol are different and are from one first pilot sequence, and the values of the first CSI-RS are loaded to the at least two REs in the resource unit by using a first multiplex code; and
sending, by the network device, the first CSI-RS to a terminal device by using the plurality of REs.
2. The method according to claim 1 , wherein values of the first CSI-RS carried on all REs in each resource unit are different from each other.
3. The method according to claim 1 , wherein the multiple REs in each resource unit carry a second CSI-RS, values of the second CSI-RS carried on at least two REs in one symbol are different, and values of the second CSI-RS are loaded to the multiple REs in each resource unit by using a second multiplex code.
4. The method according to claim 1 , wherein the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a comprises at least one of the following:
a length of an orthogonal code used by a CSI-RS port during frequency domain code division multiplexing; or
a quantity of REs occupied by a CSI-RS port in one symbol in one resource unit.
5. The method according to claim 4 , wherein the network device sends, by using Radio Resource Control (RRC) signaling, the first parameter a to the terminal device.
6. The method according to claim 1 , wherein the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a is 2.
7. A network device, comprising:
at least one processor configured to determine a plurality of resource elements (REs) for carrying a first channel state information reference signal (CSI-RS) of one CSI-RS port, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, values of the first CSI-RS carried on at least two REs in one symbol are different and are from one first pilot sequence, and the values of the first CSI-RS are loaded to the at least two REs in the resource unit by using a first multiplex code; and
a transceiver configured to send the first CSI-RS to a terminal device by using the plurality of REs.
8. The network device according to claim 7 , wherein values of the first CSI-RS carried on all REs in each resource unit are different from each other.
9. The network device according to claim 7 , wherein multiple REs in each resource unit carry a second CSI-RS, values of the second CSI-RS carried on at least two REs in one symbol are different, and values of the second CSI-RS are loaded to the multiple REs in each resource unit by using a second multiplex code.
10. The network device according to claim 7 , wherein the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a comprises at least one of the following:
a length of an orthogonal code used by a CSI-RS port during frequency domain code division multiplexing; or
a quantity of REs occupied by a CSI-RS port in one symbol in one resource unit.
11. The network device according to claim 7 , wherein the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a is 2.
12. The network device according to claim 11 , wherein the transceiver is further configured to send, by using Radio Resource Control (RRC) signaling, the first parameter a to the terminal device.
13. A non-transitory computer-readable medium having processor-executable instructions stored thereon for performing a reference signal sending method, wherein the processor-executable instructions, when executed, facilitate:
determining a plurality of resource elements (REs) for carrying a first channel state information reference signal (CSI-RS) of one CSI-RS port, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, values of the first CSI-RS carried on at least two REs in one symbol are different and are from one first pilot sequence, and the values of the first CSI-RS are loaded to the at least two REs in the resource unit by using a first multiplex code; and
sending the first CSI-RS to a terminal device by using the plurality of REs.
14. The non-transitory computer-readable medium according to claim 13 , wherein values of the first CSI-RS carried on all REs in each resource unit are different from each other.
15. The non-transitory computer-readable medium according to claim 13 , wherein multiple REs in each resource unit carry a second CSI-RS, values of the second CSI-RS carried on at least two REs in one symbol are different, and values of the second CSI-RS are loaded to the multiple REs in each resource unit by using a second multiplex code.
16. The non-transitory computer-readable medium according to claim 13 , wherein the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a comprises at least one of the following:
a length of an orthogonal code used by a CSI-RS port during frequency domain code division multiplexing; or
a quantity of REs occupied by a CSI-RS port in one symbol in one resource unit.
17. The non-transitory computer-readable medium according to claim 16 , wherein the value of the first parameter a is 2.
18. A processing apparatus, comprising:
a memory having program code stored thereon; and
at least one processor configured to execute the program code stored in the memory to facilitate performance of a reference signal sending method, wherein the reference signal sending method comprises:
determining a plurality of resource elements (REs) for carrying a first channel state information reference signal (CSI-RS) of one CSI-RS port, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, values of the first CSI-RS carried on at least two REs in one symbol are different and are from one first pilot sequence, and the values of the first CSI-RS are loaded to the at least two REs in the resource unit by using a first multiplex code; and
sending the first CSI-RS to a terminal device by using the plurality of REs.
19. The processing apparatus according to claim 18 , wherein the memory is integrated in or independent of the at least one processor.
20. The processing apparatus according to claim 18 , wherein values of the first CSI-RS carried on all REs in each resource unit are different from each other.
21. The processing apparatus according to claim 18 , wherein the multiple REs in each resource unit carry a second CSI-RS, values of the second CSI-RS carried on at least two REs in one symbol are different, and values of the second CSI-RS are loaded to the multiple REs in each resource unit by using a second multiplex code.
22. The processing apparatus according to claim 18 , wherein the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a comprises at least one of the following:
a length of an orthogonal code used by a CSI-RS port during frequency domain code division multiplexing; or
a quantity of REs occupied by a CSI-RS port in one symbol in one resource unit.
23. The processing apparatus according to claim 22 , wherein the value of the first parameter a is 2.