Method and apparatus for channel state information reference signal (CSI-RS)
Methods and apparatuses for channel state information reference signal (CSI-RS) reporting. A method for operating a user equipment (UE) includes receiving and decoding higher-layer configuration information for N CSI reporting settings and M Resource settings. The method also includes receiving downlink control information (DCI) that includes a DCI field for requesting aperiodic CSI reporting. The method further includes calculating a CSI according to the configuration information and the DCI and transmitting the calculated CSI on an uplink (UL) channel. N is at least one, M is greater than one, and the DCI field includes a selection of one out of X STATE configured states.
1. A user equipment (UE), comprising:
a transceiver configured to:
receive higher-layer configuration information for N channel state information (CSI) reporting settings and M Resource settings, and
receive downlink control information (DCI) that includes a DCI field for requesting aperiodic CSI reporting; and
a processor operably connected to the transceiver, the processor configured to:
decode the higher-layer configuration information and the DCI, and
calculate a CSI according to the higher-layer configuration information and the DCI,
wherein the transceiver is further configured to transmit the calculated CSI on an uplink (UL) channel, and
wherein N is at least one, M is greater than one, and the DCI field indicates a selection of one out of X STATE configured states.
2. The UE of claim 1 , wherein:
at least one of the M Resource settings includes at least one CSI-reference signal (RS) resource set, and
the at least one CSI-RS resource set includes at least one CSI-RS resource.
3. The UE of claim 2 , wherein at least one of the X STATE configured states corresponds to the at least one CSI-RS resource set.
4. The UE of claim 1 , wherein at least one of the X STATE configured states corresponds to at least one downlink component carrier.
5. The UE of claim 1 , wherein:
the X STATE configured states are a subset of X STATE higher-layer configured states, the subset is configured via a media access control (MAC) control element if X STATE is greater than X STATE , and
the X STATE configured states are higher-layer configured if X STATE is not greater than X STATE .
6. The UE of claim 5 , wherein at least one of X STATE and X STATE is higher-layer configured.
7. The UE of claim 1 , wherein at least one of the X STATE configured states corresponds to at least one CSI reporting setting.
8. A base station (BS), comprising:
a processor configured to generate (i) higher-layer configuration information for N channel state information (CSI) reporting settings and M Resource settings and (ii) downlink control information (DCI) that includes a DCI field for requesting aperiodic CSI reporting; and
a transceiver operably connected to the processor, the transceiver configured to:
transmit the higher-layer configuration information and the DCI to a user equipment (UE) via one or more downlink (DL) control channels, and
receive, from the UE, a CSI report calculated in accordance with the higher-layer configuration information and the DCI on an uplink (UL) channel,
wherein N is at least one, M is greater than one, and the DCI field includes a selection of one out of X STATE configured states.
9. The BS of claim 8 , wherein:
at least one of the M Resource settings includes at least one CSI-reference signal (RS) resource set, and
the at least one CSI-RS resource set includes at least one CSI-RS resource.
10. The BS of claim 9 , wherein at least one of the X STATE configured states corresponds to the at least one CSI-RS resource set.
11. The BS of claim 8 , wherein at least one of the X STATE configured states corresponds to at least one DL component carrier.
12. The BS of claim 8 , wherein:
the X STATE configured states are a subset of X STATE higher-layer configured states,
the subset is configured via a media access control (MAC) control element if X STATE is greater than X STATE , and
the X STATE configured states are higher-layer configured if X STATE is not greater than X STATE .
13. The BS of claim 8 , wherein at least one of the X STATE configured states corresponds to at least one CSI reporting setting.
14. A method for operating a user equipment (UE), the method comprising:
receiving and decoding higher-layer configuration information for N channel state information (CSI) reporting settings and M Resource settings;
receiving downlink control information (DCI) that includes a DCI field for requesting aperiodic CSI reporting;
calculating a CSI according to the higher-layer configuration information and the DCI; and
transmitting the calculated CSI on an uplink (UL) channel,
wherein N is at least one, M is greater than one, and the DCI field includes a selection of one out of X STATE configured states.
15. The method of claim 14 , wherein:
at least one of the M Resource settings includes at least one CSI-reference signal (RS) resource set, and
the at least one CSI-RS resource set includes at least one CSI-RS resource.
16. The method of claim 15 , wherein at least one of the X STATE configured states corresponds to the at least one CSI-RS resource set.
17. The method of claim 14 , wherein at least one of the X STATE configured states corresponds to at least one downlink component carrier.
18. The method of claim 14 , wherein:
the X STATE configured states are a subset of X STATE higher-layer configured states,
the subset is configured via a media access control (MAC) control element if X STATE is greater than X STATE , and
the X STATE configured states are higher-layer configured if X STATE is not greater than X STATE .
19. The method of claim 18 , wherein at least one of X STATE and X STATE is higher-layer configured.
20. The method of claim 14 , wherein at least one of the X STATE configured states corresponds to at least one CSI reporting setting.