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 base station, comprising:
at least one transceiver; and
at least one processor configured to:
transmit configuration information for sets of large scale channel properties to a user equipment (UE) via the at least one transceiver, wherein a type of each of the sets of large scale channel properties is one of a plurality 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, and
transmit a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH) to the UE via the at least one transceiver,
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a first reference signal (RS) are quasi co-located according to a first of the sets of large scale channel properties and the antenna port of the DM-RS of the PDSCH and an antenna port of a second RS are quasi co-located according to a second of the sets of large scale channel properties.
2. The base station of claim 1 , wherein the sets of large scale channel properties each include at least one of a delay spread, a Doppler spread, a Doppler shift, an average gain, or an average delay, and
wherein the configuration information is transmitted via a radio resource control (RRC) signaling.
3. The base station of claim 1 , wherein the first set of large scale channel properties is associated with an RS configuration corresponding to the first RS, and
wherein the RS configuration indicates a RS pattern for the first RS.
4. The base station of claim 3 , wherein the RS configuration includes a number of antenna ports and a scrambling identity.
5. The base station of claim 3 , wherein RS ports of the RS configuration are quasi co-located according to large scale channel properties including a delay spread, a Doppler spread, a Doppler shift, an average gain, and an average delay.
6. The base station of claim 3 , wherein the RS pattern corresponds to a type of time and frequency allocation for one or more RSs of the RS configuration.
7. The base station of claim 1 , wherein a RS pattern of the first RS is configured by higher layer signaling, and
wherein the first RS comprises a channel state information-reference signal (CSI-RS).
8. The base station of claim 1 , wherein the at least one processor is further configured to:
transmit downlink control information (DCI) including bits on a physical downlink control channel (PDCCH) to the UE via the at least one transceiver,
wherein the bits indicate a RS configuration among RS configurations specific to the UE and one of the sets of large scale channel properties.
9. A user equipment (UE), comprising:
at least one transceiver; and
at least one processor configured to:
receive configuration information for sets of large scale channel properties from a base station via the at least one transceiver, wherein a type of each of the sets of large scale channel properties is one of a plurality 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, and
receive a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH) from the base station via the at least one transceiver,
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a first reference signal (RS) are quasi co-located according to a first of the sets of large scale channel properties and the antenna port of the DM-RS of the PDSCH and an antenna port of a second RS are quasi co-located according to a second of the sets of large scale channel properties.
10. The UE of claim 9 , wherein the sets of large scale channel properties each include at least one of a delay spread, a Doppler spread, a Doppler shift, an average gain, or an average delay, and
wherein the configuration information is transmitted via a radio resource control (RRC) signaling.
11. The UE of claim 9 , wherein the first set of large scale channel properties is associated with an RS configuration corresponding to the first RS, and
wherein the RS configuration indicates a RS pattern for the first RS.
12. The UE of claim 11 , wherein the RS configuration includes a number of antenna ports and a scrambling identity.
13. The UE of claim 11 , wherein RS ports of the RS configuration are quasi co-located according to large scale channel properties including a delay spread, a Doppler spread, a Doppler shift, an average gain, and an average delay.
14. The UE of claim 11 , wherein the RS pattern corresponds to a type of time and frequency allocation for one or more RSs of the RS configuration.
15. The UE of claim 9 , wherein a RS pattern of the first RS is configured by higher layer signaling, and
wherein the first RS comprises a channel state information-reference signal (CSI-RS).
16. The UE of claim 9 , wherein the at least one processor is further configured to:
receive downlink control information (DCI) including bits on a physical downlink control channel (PDCCH) from the base station via the at least one transceiver,
wherein the bits indicate a RS configuration among RS configurations specific to the UE and one of the sets of large scale channel properties.
17. A method performed by a base station, the method comprising:
transmitting configuration information for sets of large scale channel properties to a user equipment (UE), wherein a type of each of the sets of large scale channel properties is one of a plurality 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; and
transmitting a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH) to the UE,
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a first reference signal (RS) are quasi co-located according to a first of the sets of large scale channel properties and the antenna port of the DM-RS of the PDSCH and an antenna port of a second RS are quasi co-located according to a second of the sets of large scale channel properties.
18. The method of claim 17 , wherein the sets of large scale channel properties each include at least one of a delay spread, a Doppler spread, a Doppler shift, an average gain, or an average delay, and
wherein the configuration information is transmitted via a radio resource control (RRC) signaling.
19. The method station of claim 17 , wherein the first set of large scale channel properties is associated with an RS configuration corresponding to the first RS, and
wherein the RS configuration indicates a RS pattern for the first RS.
20. The method of claim 19 , wherein the RS configuration includes a number of antenna ports and a scrambling identity.
21. The method of claim 19 , wherein RS ports of the RS configuration are quasi co-located according to large scale channel properties including a delay spread, a Doppler spread, a Doppler shift, an average gain, and an average delay.
22. The method of claim 19 , wherein the RS pattern corresponds to a type of time and frequency allocation for one or more RS s of the RS configuration.
23. The method of claim 19 , wherein a RS pattern of the first RS is configured by higher layer signaling, and
wherein the first RS comprises a channel state information-reference signal (CSI-RS).
24. The method of claim 17 , further comprising:
transmitting downlink control information (DCI) including bits on a physical downlink control channel (PDCCH),
wherein the bits indicate a RS configuration among RS configurations specific to the UE and one of the sets of large scale channel properties.
25. A method performed by a user equipment (UE), the method comprising:
receiving receive configuration information for sets of large scale channel properties from a base station, wherein a type of each of the sets of large scale channel properties is one of a plurality 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; and
receiving a demodulation reference signal (DM-RS) of a physical downlink shared channel (PDSCH) from the base station,
wherein an antenna port of the DM-RS of the PDSCH and an antenna port of a first reference signal (RS) are quasi co-located according to a first of the sets of large scale channel properties and the antenna port of the DM-RS of the PDSCH and an antenna port of a second RS are quasi co-located according to a second of the sets of large scale channel properties.
26. The method of claim 25 , wherein the sets of large scale channel properties each include at least one of a delay spread, a Doppler spread, a Doppler shift, an average gain, or an average delay, and
wherein the configuration information is transmitted via a radio resource control (RRC) signaling.
27. The method of claim 25 , wherein the set of large scale channel properties is associated with an RS configuration corresponding to the first RS, and wherein the RS configuration indicates a RS pattern for the first RS.
28. The method of claim 27 , wherein the RS configuration includes a number of antenna ports and a scrambling identity.
29. The method of claim 27 , wherein RS ports of the RS configuration are quasi co-located according to large scale channel properties including a delay spread, a Doppler spread, a Doppler shift, an average gain, and an average delay.
30. The method of claim 27 , wherein the RS pattern corresponds to a type of time and frequency allocation for one or more RSs of the RS configuration.
31. The method of claim 25 , wherein a RS pattern of the first RS is configured by higher layer signaling, and
wherein the first RS comprises a channel state information-reference signal (CSI-RS).
32. The method of claim 25 , further comprising:
receiving downlink control information (DCI) including bits on a physical downlink control channel (PDCCH),
wherein the bits indicate a RS configuration among RS configurations specific to the UE and one of the sets of large scale channel properties.