Reference signal transmitting method, reference signal receiving method, apparatus, and system
Embodiments of the present disclosure relate to the communications field, and provide a reference signal transmitting/receiving method and system, and an apparatus. The method includes: determining, by a transmitting device, a first resource map of a reference signal supporting Z antenna ports, and transmitting the reference signal after the reference signal supporting Z antenna ports is mapped to a target time-frequency resource based on the first resource map, where the first resource map is repeated in time domain and/or frequency domain in a repetition unit of K resource units, each of the K resource units corresponds to a second resource map of a reference signal supporting P antenna ports, and the P antenna ports corresponding to the second resource map for every two adjacent resource units include G same antenna ports and H different antenna ports.
1. A receiving device, comprising:
a receiver; and
at least one processor coupled to the receiver, the at least one processor configured to:
determine a first resource map of a reference signal supporting Z antenna ports, wherein the first resource map comprises a location at which the reference signal supporting Z antenna ports is mapped to a time-frequency resource, and wherein Z is an integer greater than or equal to 4; and
receive, based on the first resource map by using the receiver, the reference signal supporting Z antenna ports from a target time-frequency resource, wherein:
the first resource map is repeated in a time domain and/or a frequency domain in a repetition unit of K resource units, the K resource units are K consecutive resource units in a time domain or K consecutive resource units in a frequency domain in a reference signal resource set, a time-frequency resource that is used to transmit the reference signal is configured for the reference signal resource set, each of the K resource units corresponds to a second resource map of a reference signal supporting P antenna ports, the P antenna ports corresponding to the second resource map for every two adjacent resource units comprise G same antenna ports and H different antenna ports, the P antenna ports are a subset of the Z antenna ports corresponding to the first resource map, K, P, G, and H are integers greater than 2, and P<Z.
2. The receiving device according to claim 1 , wherein:
the Z antenna ports comprise M groups of antenna ports, each group comprises Y antenna ports, and Z=M*Y; and
the second resource map is obtained by aggregating N third resource maps, each third resource map corresponds to one group of antenna ports in the M groups of antenna ports, P=N*Y, G=A*Y, H=B*Y, and A+B=N, wherein M and N are integers greater than or equal to 2, A and B are integers greater than or equal to 1, and Y is a power of 2.
3. The receiving device according to claim 1 , wherein:
any two second resource maps in the K resource units occupy a same time domain location in a time-frequency resource pattern corresponding to a single resource unit; and
at least two second resource maps in the K resource units occupy different frequency domain locations in a time-frequency resource pattern corresponding to a single resource unit, and/or at least two second resource maps in the K resource units occupy a same frequency domain location in a time-frequency resource pattern corresponding to a single resource unit.
4. The receiving device according to claim 1 , wherein in the K resource units:
a j th third resource map in an i th resource unit and a j th third resource map in an (i+1) th resource unit occupy a same time domain location in a time-frequency resource pattern corresponding to a single resource unit; and
the j th third resource map in the i th resource unit is corresponding to one group of antenna ports in M groups of antenna ports, and the j th third resource map in the (i+1) th resource unit is corresponding to another group of antenna ports in the M groups of antenna ports, wherein 0≤i≤K−1 and 0≤j≤N−1, i and j are integers, and M and N are integers greater than or equal to 2.
5. The receiving device according to claim 1 , wherein:
the K resource units occupy a same time domain resource in the reference signal resource set, and the K resource units are consecutive in frequency domain of the reference signal resource set;
a j th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and M j th third resource maps in M resource units are in a one-to-one correspondence to M groups of antenna ports;
a (j+1) th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and M (j+1) th third resource maps in the M resource units are in a one-to-one correspondence to the M groups of antenna ports; and
a j th third resource map and a (j+1) th third resource map in a same resource unit are corresponding to different antenna ports, wherein 0≤j<j+1≤N−1, i and j are integers, and M and N are integers greater than or equal to 2.
6. The receiving device according to claim 1 , wherein:
the K resource units occupy a same frequency domain resource in the reference signal resource set, and the K resource units are consecutive in the time domain of the reference signal resource set;
a j th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and j th third resource maps in M resource units are in a one-to-one correspondence to M groups of antenna ports;
a (j+1) th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and M (j+1) th third resource maps in the M resource units are in a one-to-one correspondence to the M groups of antenna ports; and
a j th third resource map and a (j+1) th third resource map in a same resource unit are corresponding to different antenna ports, wherein 0≤j<j+1≤N−1, i and j are integers, and M and N are integers greater than or equal to 2.
7. The receiving device according to claim 1 , wherein:
the K resource units occupy a same frequency domain resource in the reference signal resource set; and
the K resource units are consecutive in the time domain of the reference signal resource set.
8. The receiving device according to claim 1 , wherein:
the K resource units occupy a same time domain resource in the reference signal resource set; and
the K resource units are consecutive in the frequency domain of the reference signal resource set.
9. The receiving device according to claim 1 , wherein:
the resource unit is a physical resource block (PRB); or
the resource unit is a PRB pair.
10. The receiving device according to claim 1 , wherein the reference signal is a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS), or a cell-specific reference signal (CRS).
11. A reference signal receiving method, the method comprising:
determining, by a receiving device, a first resource map of a reference signal supporting Z antenna ports, wherein the first resource map comprises a location at which the reference signal supporting Z antenna ports is mapped to a time-frequency resource, and wherein Z is an integer greater than or equal to 4; and
receiving, by the receiving device based on the first resource map, the reference signal supporting Z antenna ports from a target time-frequency resource, wherein:
the first resource map is repeated in a time domain and/or a frequency domain in a repetition unit of K resource units, the K resource units are K consecutive resource units in a time domain or K consecutive resource units in a frequency domain in a reference signal resource set, a time-frequency resource that is used to transmit the reference signal is configured for the reference signal resource set, each of the K resource units corresponds to a second resource map of a reference signal supporting P antenna ports, the P antenna ports corresponding to the second resource map for every two adjacent resource units comprise G same antenna ports and H different antenna ports, the P antenna ports are a subset of the Z antenna ports corresponding to the first resource map, K, P, G, and H are integers greater than 2, and P<Z.
12. The method according to claim 11 , wherein:
the Z antenna ports comprise M groups of antenna ports, each group comprises Y antenna ports, and Z=M*Y; and
the second resource map is obtained by aggregating N third resource maps, each third resource map is corresponding to one group of antenna ports in the M groups of antenna ports, P=N*Y, G=A*Y, H=B*Y, and A+B=N, wherein M and N are integers greater than or equal to 2, A and B are integers greater than or equal to 1, and Y is a power of 2.
13. The method according to claim 11 , wherein:
any two second resource maps in the K resource units occupy a same time domain location in a time-frequency resource pattern corresponding to a single resource unit; and
at least two second resource maps in the K resource units occupy different frequency domain locations in a time-frequency resource pattern corresponding to a single resource unit, and/or at least two second resource maps in the K resource units occupy a same frequency domain location in a time-frequency resource pattern corresponding to a single resource unit.
14. The method according to claim 11 , wherein in the K resource units:
a j th third resource map in an i th resource unit and a j th third resource map in an (i+1) th resource unit occupy a same time domain location in a time-frequency resource pattern corresponding to a single resource unit; and
the j th third resource map in the i th resource unit is corresponding to one group of antenna ports in M groups of antenna ports, and the j th third resource map in the (i+1) th resource unit is corresponding to another group of antenna ports in the M groups of antenna ports, wherein 0≤i≤K−1 and 0≤j≤N−1, i and j are integers, and M and N are integers greater than or equal to 2.
15. The method according to claim 11 , wherein:
the K resource units occupy a same time domain resource in the reference signal resource set, and the K resource units are consecutive in the frequency domain of the reference signal resource set;
a j th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and M j th third resource maps in M resource units are in a one-to-one correspondence to M groups of antenna ports;
a (j+1) th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and M (j+1) th third resource maps in the M resource units are in a one-to-one correspondence to the M groups of antenna ports; and
a j th third resource map and a (j+1) th third resource map in a same resource unit are corresponding to different antenna ports, wherein 0≤j<j+1<N−1, i and j are integers, and M and N are integers greater than or equal to 2.
16. The method according to claim 11 , wherein:
the K resource units occupy a same frequency domain resource in the reference signal resource set, and the K resource units are consecutive in the time domain of the reference signal resource set;
a j th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and j th third resource maps in M resource units are in a one-to-one correspondence to M groups of antenna ports;
a (j+1) th third resource map in each of the K resource units occupies a same time domain location in a single resource unit, and M (j+1) th third resource maps in the M resource units are in a one-to-one correspondence to the M groups of antenna ports; and
a j th third resource map and a (j+1) th third resource map in a same resource unit are corresponding to different antenna ports, wherein 0≤j<j+1<N−1, i and j are integers, and M and N are integers greater than or equal to 2.
17. The method according to claim 11 , wherein:
the K resource units occupy a same frequency domain resource in the reference signal resource set; and
the K resource units are consecutive in the time domain of the reference signal resource set.
18. The method according to claim 11 , wherein:
the K resource units occupy a same frequency domain time domain resource in the reference signal resource set; and
the K resource units are consecutive in a time domain frequency domain of the reference signal resource set.
19. The method according to claim 11 , wherein the resource unit is a physical resource block (PRB), or the resource unit is a PRB pair.
20. The method according to claim 11 , wherein the reference signal is a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS), or a cell-specific reference signal (CRS).