Method and apparatus for transmission pattern configuration and signal detection
Embodiments of the present disclosure provide a method for configuring transmission pattern in a wireless system. The method comprises indicating a number of antenna ports to be used for the transmission pattern; and configuring transmission resource for the number of antenna ports by indicating K resource configurations, with each resource configuration indicating resource for one of K subsets of antenna ports which form a set of the number of antenna ports. A method for signal detection according to the transmission pattern is also provided. Embodiments of the present disclosure also provide corresponding apparatus.
1. A method performed by a base station, the method comprising:
configuring a transmission resource for Channel State Information Reference Signals (CSI-RS) corresponding to N antenna ports by aggregating K>1 resource configurations for transmission of the CSI-RS in a same subframe to obtain the N antenna ports in total, each of the K resource configurations corresponding to N i antenna ports, wherein N=KN i ;
transmitting the K resource configurations and information indicating frequency domain density of the transmission resource for the CSI-RS corresponding to the N antenna ports in terms of resource blocks, to a user equipment (UE); and
transmitting the CSI-RS, according to the frequency domain density, using a first group of resource blocks in a comb-like pattern with an interval of at least one resource block in frequency domain, wherein the K resource configurations are applied to the first group of resource blocks.
2. The method of claim 1 , wherein K=3, N i = 4 or 8.
3. The method of claim 1 , further comprising: transmitting an information indicating a number of antenna ports as a basis to obtain N.
4. The method of claim 3 , wherein the information indicating the number of antenna ports is transmitted via a radio resource control RRC signaling.
5. The method of claim 4 , wherein transmitting the K resource configurations comprises indicating the K resource configurations via the same RRC signaling.
6. The method of claim 1 , further comprising: transmitting a signal to the UE on the N antenna ports.
7. The method of claim 1 , wherein according to the frequency domain density, the reference signals are transmitted using every two resource blocks in frequency domain.
8. A method performed by a user equipment (UE), the method comprising:
receiving, from the base station:
K>1 resource configurations for transmission of Channel State Information Reference Signals (CSI-RS), wherein;
N antenna ports are obtained by aggregating the K resource configurations in a same subframe,
each of the K resource configurations corresponds to N i antenna ports, and
N=KN i ; and
information indicating frequency domain density of transmission resource for the CSI-RS corresponding to the N antenna ports in terms of resource blocks; and
receiving the CSI_RS from the base station, according to the frequency domain density, using a first group of resource blocks in a comb-like pattern with an interval of at least one resource block in frequency domain, wherein the K resource configurations are applied to the first group of resource blocks.
9. The method of claim 8 , wherein K=3, N i= 4 or 8.
10. The method of claim 8 , further comprising: receiving an information indicating a number of antenna ports as a basis to obtain N.
11. The method of claim 10 , wherein the information indicating the number of antenna ports is received via a radio resource control (RRC) signaling.
12. The method of claim 11 , wherein receiving the K resource configurations comprises receiving the K resource configurations via the same RRC signaling.
13. The method of claim 8 , further comprising: receiving a signal from the base station on the N antenna ports.
14. The method of claim 8 , further comprising:
transmitting the reference signals using every two resource blocks in frequency domain according to the frequency domain density.
15. A base station, comprising:
a controller, configured to configure a transmission resource for Channel State Information Reference Signals (CSI-RS) corresponding to N antenna ports by aggregating K>1 resource configurations for transmission of the CSI_RS in a same subframe to obtain the N antenna ports in total, each of the K resource configurations corresponding to N, antenna ports, wherein N=KN i ; and
a transceiver, configured to;
transmit the K resource configurations and information indicating frequency domain density of the transmission resource for the CSI_RS corresponding to the N antenna ports in terms of resource blocks to a user equipment (UE); and transmit the CSI_RS according to the frequency domain density, using a first group of resource blocks in a comb-like pattern with an interval of at least one resource block in frequency domain, wherein the K resource configurations are applied to the first group of resource blocks.
16. The base station of claim 15 , further comprising:
a second transmission module, configured to transmit an information indicating a number of antenna ports as a basis to obtain N.
17. The base station of claim 16 , wherein the information indicating the number of antenna ports is transmitted via a radio resource control (RRC) signaling.
18. The base station of claim 17 , wherein transmitting the K resource configurations comprises transmitting the K resource configurations via the same RRC signaling.
19. The base station of claim 15 , further comprising:
a third transmission module, configured to transmit a signal to the UE on the N antenna ports.
20. The base station of claim 15 , wherein according to the frequency domain density, the reference signals are transmitted using every two resource blocks in frequency domain.