Method and apparatus for transmitting and receiving reference signals in wireless communication
A base station includes a controller configured to configure an MRS resource set comprising a group of MRS resources, each MRS resource comprising a set of MRS antenna ports. If at least two MRS antenna ports belong to a same MRS resource, then the at least two MRS antenna ports are quasi co-located with respect to a first set of QCL parameters, else if the at least two MRS antenna ports belong to a same MRS resource set, then the at least two MRS antenna ports are quasi co-located with respect to a second set of QCL parameters, and else the at least two MRS antenna ports are not quasi co-located with respect to either the first set or the second set of QCL parameters. The MRS is a CSI-RS for estimating a CSI and at least one of the first set and the second set of QCL parameters.
1. A method performed by a user equipment (UE), the method comprising:
receiving, from a base station, via a radio resource control (RRC) signaling, configuration information of a set of large-scale channel properties, wherein the set of large-scale channel properties is configured based on information related to a pattern of channel state information-reference signals (CSI-RSs) in a CSI-RS configuration; and
receiving, from the base station, a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH),
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a CSI-RS in the CSI-RS configuration are quasi co-located according to the set of large-scale channel properties,
wherein a type of the set of large-scale channel properties is one of types including a first type and a second type,
wherein, if the type is the first type, the set of large-scale channel properties comprises a delay spread, a Doppler spread, a Doppler shift, and an average delay, and
wherein, if the type is the second type, the set of large-scale channel properties comprises a Doppler spread and a Doppler shift.
2. The method of claim 1 , wherein the CSI-RS configuration includes a number of one or more antenna ports and a scrambling identity.
3. The method of claim 1 , wherein the information related to the pattern of the CSI-RSs indicates a time density and a frequency density.
4. The method of claim 1 , further comprising:
receiving, from the base station, downlink control information (DCI) for scheduling the PDSCH on a physical downlink control channel (PDCCH),
wherein a value of the DCI indicates the CSI-RS configuration and the set of large-scale channel properties.
5. A method performed by a base station, the method comprising:
transmitting, to a user equipment (UE), via a radio resource control (RRC) signaling, configuration information of a set of large-scale channel properties, wherein the set of large-scale channel properties is configured based on information related to a pattern of channel state information-reference signals (CSI-RSs) of a CSI-RS configuration; and
transmitting, to the UE, a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH),
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a CSI-RS in the CSI-RS configuration are quasi co-located according to the set of large-scale channel properties,
wherein a type of the set of large-scale channel properties is one of types including a first type and a second type,
wherein, if the type is the first type, the set of large-scale channel properties comprises a delay spread, a Doppler spread, a Doppler shift, and an average delay, and
wherein, if the type is the second type, the set of large-scale channel properties comprises a Doppler spread and a Doppler shift.
6. The method of claim 5 , wherein the CSI-RS configuration includes a number of one or more antenna ports and a scrambling identity.
7. The method of claim 5 , wherein the information related to the pattern of the CSI-RSs indicates a time density and a frequency density.
8. The method of claim 5 , further comprising:
transmitting, to the UE, downlink control information (DCI) for scheduling the PDSCH on a physical downlink control channel (PDCCH),
wherein a value of the DCI indicates the CSI-RS configuration and the set of large-scale channel properties.
9. A user equipment (UE), comprising:
at least one transceiver; and
at least one processor configured to control the at least one transceiver to:
receive, from a base station, via a radio resource control (RRC) signaling, configuration information of a set of large-scale channel properties, wherein the set of large-scale channel properties is configured based on information related to a pattern of channel state information-reference signals (CSI-RSs) of a CSI-RS configuration, and
receive, from the base station, a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH),
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a CSI-RS in the CSI-RS configuration are quasi co-located according to the set of large-scale channel properties,
wherein a type of the set of large-scale channel properties is one of types including a first type and a second type,
wherein, if the type is the first type, the set of large-scale channel properties comprises a delay spread, a Doppler spread, a Doppler shift, and an average delay, and
wherein, if the type is the second type, the set of large-scale channel properties comprises a Doppler spread and a Doppler shift.
10. The UE of claim 9 , wherein the CSI-RS configuration includes a number of one or more antenna ports and a scrambling identity.
11. The UE of claim 9 , wherein the information related to the pattern of the CSI-RSs indicates a time density and a frequency density.
12. The UE of claim 9 , wherein the at least one processor is configured to control the at least one transceiver to receive, from the base station, downlink control information (DCI) for scheduling the PDSCH on a physical downlink control channel (PDCCH),
wherein a value of the DCI indicates the CSI-RS configuration and the set of large-scale channel properties.
13. A base station, comprising:
at least one transceiver; and
at least one processor configured to control the at least one transceiver to:
transmit, to a user equipment (UE), via a radio resource control (RRC) signaling, configuration information of a set of large-scale channel properties, wherein the set of large-scale channel properties is configured based on information related to a pattern of channel state information-reference signals (CSI-RSs) of a CSI-RS configuration; and
transmit, to the UE, a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH),
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a CSI-RS in the CSI-RS configuration are quasi co-located according to the set of large-scale channel properties,
wherein a type of the set of large-scale channel properties is one of types including a first type and a second type,
wherein, if the type is the first type, the set of large-scale channel properties comprises a delay spread, a Doppler spread, a Doppler shift, and an average delay, and
wherein, if the type is the second type, the set of large-scale channel properties comprises a Doppler spread and a Doppler shift.
14. The base station of claim 13 , wherein the CSI-RS configuration includes a number of one or more antenna ports and a scrambling identity.
15. The base station of claim 13 , wherein the information related to the pattern of the CSI-RSs indicates a time density and a frequency density.
16. The base station of claim 13 ,
wherein the at least one processor is configured to control the at least one transceiver to transmit, to the UE, downlink control information (DCI) for scheduling the PDSCH on a physical downlink control channel (PDCCH), and
wherein a value of the DCI indicates the CSI-RS configuration and the set of large-scale channel properties.