Method for signaling control information for coordinated multipoint transmission in wireless communication system
View Patent ↗Disclosed is a method for signaling control information for coordinated multipoint (CoMP) transmission in a wireless communication system. The control information signaling method for CoMP transmission is performed by a base station and comprises providing, through RRC signaling, a terminal with setup information on each CSI-RS resource of a CoMP measurement group which is set in the terminal; and selectively providing, through DCI, the terminal with control information which indicates mapping of the PDSCH resource element corresponding to terminal and at least either pseudo-same positionality information of CSI-RS or pseudo-same positionality information of DM-RS. Thus, control information signaling for coordinated multipoint transmission can be efficiently performed.
1. A communication method performed by a user equipment (UE), the method comprising:
receiving a first message comprising a predetermined number of sets of parameters, each of the predetermined number of sets of parameters comprising information on a location of a zero-power Channel State Information Reference Signal (CSI-RS) and Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration information;
receiving Downlink Control Information (DCI) on a physical downlink control channel (PDCCH) in a first subframe, wherein the DCI comprises an identifier, consisting of a predetermined number of bits, which indicates a first set of parameters among the predetermined number of sets of parameters;
determining a first set of radio resources of a physical downlink shared channel (PDSCH) in the first subframe based on the DCI; and
receiving data using the first set of radio resources of the PDSCH in the first subframe.
2. The method of claim 1 , wherein the DCI on the PDCCH is related to semi persistent scheduling (SPS) activation.
3. The method of claim 1 , wherein the DCI corresponds to a downlink control information (DCI) format 2D.
4. The method of claim 1 , wherein the predetermined number of bits are two (2) bits which indicate one of four sets of parameters.
5. The method of claim 1 , wherein the predetermined number of sets of parameters comprise a second set of parameters, the second set of parameters comprises information on another location of another zero-power CSI-RS, and the location of the zero-power CSI-RS is different from the another location of the another zero-power CSI-RS.
6. The method of claim 1 , wherein each of the predetermined number of sets of parameters comprise information on a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol.
7. A communication method performed by a base station, the method comprising:
transmitting a first message comprising a predetermined number of sets of parameters to a user equipment (UE), each of the predetermined number of sets of parameters comprising information on a location of a zero-power Channel State Information Reference Signal (CSI-RS) and Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration information;
transmitting Downlink Control Information (DCI) on a physical downlink control channel (PDCCH) to the UE in a first subframe, wherein the DCI comprises an identifier, consisting of a predetermined number of bits, which indicates a first set of parameters among the predetermined number of sets of parameters, wherein the first message and the DCI allow the UE to determine a first set of radio resources of a physical downlink shared channel (PDSCH) in the first subframe; and
transmitting data using the first set of radio resources of the PDSCH to the UE in the first subframe.
8. The method of claim 7 , wherein the DCI on the PDCCH is related to semi persistent scheduling (SPS) activation.
9. The method of claim 7 , wherein:
the first set of parameters allows the UE to receive the data, and
the information, in the first set of parameters, on the location of the zero-power CSI-RS allows the UE to measure the channel conditions.
10. The method of claim 7 , wherein each of the predetermined number of sets of parameters comprise information on a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol.
11. A communication apparatus for a user equipment (UE), the apparatus comprising:
a circuitry,
wherein the circuitry is configured to:
cause the UE to receive a first message comprising a predetermined number of sets of parameters, each of the predetermined number of sets of parameters comprising information on a location of a zero-power Channel State Information Reference Signal (CSI-RS) and Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration information;
cause the UE to receive Downlink Control Information (DCI) on a physical downlink control channel (PDCCH) in a first subframe, wherein the DCI comprises an identifier, consisting of a predetermined number of bits, which indicates a first set of parameters among the predetermined number of sets of parameters;
cause the UE to determine a first set of radio resources of a physical downlink shared channel (PDSCH) in the first subframe based on the DCI; and
cause the UE to receive data using the first set of radio resources of the PDSCH in the first subframe.
12. The apparatus of claim 11 , wherein the DCI on the PDCCH is related to semi persistent scheduling (SPS) activation.
13. The apparatus of claim 11 , wherein the DCI corresponds to a downlink control information (DCI) format 2D.
14. The apparatus of claim 11 , wherein the predetermined number of bits are two (2) bits which indicate one of four sets of parameters.
15. The apparatus of claim 11 , wherein the predetermined number of sets of parameters comprise a second set of parameters, the second set of parameters comprises information on another location of another zero-power CSI-RS, and the location of the zero-power CSI-RS is different from the another location of the another zero-power CSI-RS.
16. The apparatus of claim 11 , wherein each of the predetermined number of sets of parameters comprises information on a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol.
17. A communication apparatus for a base station, the apparatus comprising:
a circuitry,
wherein the circuitry is configured to:
cause the communication apparatus to transmit a first message comprising a predetermined number of sets of parameters to a user equipment (UE), each of the predetermined number of sets of parameters comprising information on a location of a zero-power Channel State Information Reference Signal (CSI-RS) and Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration information;
cause the communication apparatus to transmit Downlink Control Information (DCI) on a physical downlink control channel (PDCCH) to the UE in a first subframe, wherein the DCI comprises an identifier, consisting of a predetermined number of bits, which indicates a first set of parameters among the predetermined number of sets of parameters, wherein the first message and the DCI allow the UE to determine a first set of radio resources of a physical downlink shared channel (PDSCH) in the first subframe; and
cause the communication apparatus to transmit data using the first set of radio resources of the PDSCH to the UE in the first subframe.
18. The apparatus of claim 17 , wherein DCI on the PDCCH is related to semi persistent scheduling (SPS) activation.
19. The apparatus of claim 17 , wherein:
the first set of parameters allows the UE to receive the data, and
the information, in the first set of parameters, on the location of the zero-power CSI-RS allows the UE to measure the channel conditions.
20. The apparatus of claim 17 , wherein each of the predetermined number of sets of parameters comprises information on a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol.
21. A user equipment (UE), comprising:
a circuitry,
wherein the circuitry is configured to:
cause the UE to receive a first message comprising a predetermined number of sets of parameters, each of the predetermined number of sets of parameters comprising information on a location of a zero-power Channel State Information Reference Signal (CSI-RS) and Multicast Broadcast Single Frequency Network (MBSFN) subframe configuration information;
cause the UE to receive Downlink Control Information (DCI) on a physical downlink control channel (PDCCH) in a first subframe, wherein the DCI comprises an identifier, consisting of a predetermined number of bits, which indicates a first set of parameters among the predetermined number of sets of parameters;
cause the UE to determine a first set of radio resources of a physical downlink shared channel (PDSCH) in the first subframe based on the DCI; and
cause the UE to receive data using the first set of radio resources of the PDSCH in the first subframe.
22. The UE of claim 21 , wherein the DCI on the PDCCH is related to semi persistent scheduling (SPS) activation.
23. The UE of claim 21 , wherein the DCI corresponds to a downlink control information (DCI) format 2D.
24. The UE of claim 21 , wherein the predetermined number of bits are two (2) bits which indicate one of four sets of parameters.
25. The UE of claim 21 , wherein the predetermined number of sets of parameters comprise a second set of parameters, the second set of parameters comprises information on another location of another zero-power CSI-RS, and the location of the zero-power CSI-RS is different from the another location of the another zero-power CSI-RS.
26. The UE of claim 21 , wherein each of the predetermined number of sets of parameters comprises information on a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol.
27. The method of claim 1 , wherein determining the first set of radio resources of the PDSCH in the first subframe comprises determining the first set of radio resources based on the location of the zero-power CSI-RS of the first set of parameters.
28. The method of claim 7 , wherein the first set of radio resources of the PDSCH in the first subframe is determined based on the information on the location of the zero-power CSI-RS of the first set of parameters.
29. The apparatus of claim 11 , wherein the circuitry is further configured to, in determining the first set of radio resources of the PDSCH in the first subframe, determine the first set of radio resources based on the location of the zero-power CSI-RS of the first set of parameters.
30. The apparatus of claim 17 , wherein the first set of radio resources of the PDSCH in the first subframe is determined based on the information on the location of the zero-power CSI-RS of the first set of parameters.
31. The UE of claim 21 , wherein the circuitry is further configured to, in determining the first set of radio resources of the PDSCH in the first subframe, determine the first set of radio resources based on the location of the zero-power CSI-RS of the first set of parameters.