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 receiving method, comprising:
receiving, by a terminal device on a plurality of resource units, signals sent by a network device, wherein the signals comprise a first channel state information reference signal (CSI-RS) of one CSI-RS port;
determining, by the terminal device, a plurality of resource elements (REs) used to carry the first CSI-RS, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, multiple REs of the plurality of REs 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 are from one first pilot sequence, and values of the first CSI-RS are loaded to the multiple REs in the resource unit by using a first multiplex code; and
obtaining, by the terminal device, the first CSI-RS on the determined 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 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 values of the first CSI-RS are from a first pilot sequence, 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 terminal device receives, by using Radio Resource Control (RRC) signaling, the first parameter a from the network device.
6. The method according to claim 1 , wherein the values of the first CSI-RS are from a first pilot sequence, the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a includes at least one of {2, 4, 8, 12}.
7. A terminal device, comprising:
a transceiver configured to receive, on a plurality of resource units, signals sent by a network device, wherein the signals comprise a first channel state information reference signal (CSI-RS) of one CSI-RS port; and
at least one of processor configured to determine a plurality of resource elements (REs) used to carry the first CSI-RS, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, multiple REs of the plurality of REs 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 are from one first pilot sequence, and values of the first CSI-RS are loaded to the multiple REs in the resource unit by using a first multiplex code;
wherein the at least one of processor is further configured to obtain the first CSI-RS on the determined plurality of REs.
8. The terminal 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 terminal device according to claim 7 , wherein the multiple REs in each resource unit further carry a second CSI-RS, values of the second CSI-RS carried on at least two REs 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 terminal device according to claim 7 , wherein the values of the first CSI-RS are from a first pilot sequence, 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 terminal device according to claim 7 , wherein the values of the first CSI-RS are from a first pilot sequence, the first pilot sequence is correlated to a first parameter a, and a value of the first parameter a includes at least one of {2, 4, 8, 12}.
12. The terminal device according to claim 11 , wherein the transceiver is further configured to receive, by using Radio Resource Control (RRC) signaling, the first parameter a from the network device.
13. A non-transitory computer-readable medium having processor-executable instructions stored thereon for performing a reference signal receiving method, wherein the processor-executable instructions, when executed, facilitate:
receiving signals comprising a first channel state information reference signal (CSI-RS) of one CSI-RS port;
determining a plurality of resource elements (REs) used to carry the first CSI-RS, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, multiple REs of the plurality of REs 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 are from one first pilot sequence, and values of the first CSI-RS are loaded to the multiple REs in the resource unit by using a first multiplex code; and
obtaining the first CSI-RS on the determined 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 the multiple REs in each resource unit carry a second CSI-RS, values of the second CSI-RS carried on at least two REs 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 values of the first CSI-RS are from a first pilot sequence, 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 includes at least one of {2, 4, 8, 12}.
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 receiving method, wherein the reference signal receiving method comprises:
receiving signals comprising a first channel state information reference signal (CSI-RS) of one CSI-RS port;
determining a plurality of resource elements (REs) used to carry the first CSI-RS, wherein the plurality of REs are distributed in a plurality of resource units, and wherein in each resource unit, multiple REs of the plurality of REs 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 are from one first pilot sequence, and values of the first CSI-RS are loaded to the multiple REs in the resource unit by using a first multiplex code; and
obtaining the first CSI-RS on the determined 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 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 values of the first CSI-RS are from a first pilot sequence, 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 includes at least one of {2, 4, 8, 12}.