Systems and methods for CSI-RS configuration and indication
Presented are systems and methods for CSI-RS configuration and indication. A wireless communication device can receive a configuration of a channel state information reference signal (CSI-RS) resource for measurement of a plurality of channels form a wireless communication node. The wireless communication device can determine measurement results according to the configuration of the CSI-RS resource.
1 . A method comprising:
receiving, by a wireless communication device from a wireless communication node via a plurality of transmission and reception points (TRPs), a configuration of a channel state information reference signal (CSI-RS) resource for measurement of a plurality of channels associated with the plurality of TRPs, the configuration comprising at least one CSI-RS pattern indicative of the CSI-RS resource in a time domain and a frequency domain;
receiving, by the wireless communication device from the wireless communication node, N transmission occasions of the CSI-RS corresponding to the plurality of channels according to the configuration of the CSI-RS resource, wherein each of the N transmission occasions of the CSI-RS is transmitted in a same set of at least one symbol in a different slot, where N is an integer value greater than 1; and
determining, by the wireless communication device, measurement results based on the N transmission occasions of the CSI-RS according to the configuration of the CSI-RS resource.
2 . The method of claim 1 , wherein the configuration of the CSI-RS resource includes a plurality of sets of code division multiplexing (CDM) groups corresponding to the plurality of channels, and each of the plurality of sets of CDM groups comprises at least one CDM group.
3 . The method of claim 2 , comprising:
receiving, by the wireless communication device from the wireless communication node, a radio resource control (RRC) signaling that identifies one or more CDM groups within each set of the plurality of sets of CDM groups.
4 . The method of claim 2 , comprising:
receiving, by the wireless communication device from the wireless communication node, a radio resource control (RRC) signaling that includes a list of the sets of CDM groups configured for the CSI-RS resource.
5 . The method of claim 2 , wherein one or more CDM groups within a first set of the plurality of sets of CDM groups are first numbered in order of increasing frequency domain allocation, and then numbered in order of increasing time domain allocation.
6 . The method of claim 5 , wherein:
ports of the CSI-RS in a CDM group numbered with a lowest group number, are numbered with lowest contiguous port numbers, and
ports of the CSI-RS in a CDM group numbered with a group number immediately higher than the lowest group number, are numbered with contiguous port numbers that are immediately higher than the lowest contiguous port numbers.
7 . The method of claim 2 , wherein the CSI-RS resource is a periodic or semi-persistent CSI-RS resource, and is configured with a plurality of quasi co-location (QCL) information or a plurality of transmission configuration indicator (TCI) states.
8 . The method of claim 2 , wherein radio resource control (RRC) parameter qcl-InfoPeriodicCSI-RS is configured to include a plurality of transmission configuration indicator (TCI) states.
9 . The method of claim 7 , wherein each of the plurality of sets of CDM groups is associated with each of the plurality of QCL information or each of the plurality of TCI states.
10 . The method of claim 9 , wherein a TCI state that is first indicated from the plurality of TCI states, or a QCL information that is first indicated from the plurality of QCL information, is associated with a set of CDM groups that has a first or lowest index.
11 . The method of claim 2 , wherein the CSI-RS resource is an aperiodic CSI-RS resource, and is configured with a plurality of lists of quasi co-location (QCL) information or a plurality of lists of transmission configuration indicator (TCI) states.
12 . The method of claim 2 , wherein radio resource control (RRC) parameter qcl-Info is configured to include a plurality of lists of transmission configuration indicator (TCI) states, or a plurality of RRC parameters is each configured to include a respective one of the plurality of lists of TCI states.
13 . The method of claim 11 , wherein each of the plurality of sets of CDM groups is associated with each of the plurality of lists of QCL information or each of the plurality of lists of TCI states.
14 . The method of claim 13 , wherein a list of TCI states that is first indicated from the plurality of lists of TCI states, or a list of QCL information that is first indicated from the plurality of lists of QCL information, is associated with a set of CDM groups that has a first or lowest index.
15 . The method of claim 1 , wherein each of the N transmission occasions of the CSI-RS is in a respective slot or at least one respective symbol.
16 . The method of claim 15 , wherein each of the N transmission occasions of the CSI-RS is transmitted in a different set of at least one symbol.
17 . A method comprising:
sending, by a wireless communication node via a plurality of transmission and reception points (TRPs), a configuration of a channel state information reference signal (CSI-RS) resource for measurement of a plurality of channels associated with the plurality of TRPs, the configuration comprising at least one CSI-RS pattern indicative of the CSI-RS resource in a time domain and a frequency domain; and
initiating, by the wireless communication node to a wireless communication device, transmission of N transmission occasions of the CSI-RS corresponding to the plurality of channels according to the configuration of the CSI-RS resource, wherein each of the N transmission occasions of the CSI-RS is transmitted in a same set of at least one symbol in a different slot, where N is an integer value greater than 1.
18 . A wireless communication device, comprising: at least one processor configured to:
receive, via a receiver from a wireless communication node and via a plurality of transmission and reception points (TRPs), a configuration of a channel state information reference signal (CSI-RS) resource for measurement of a plurality of channels associated with the plurality of TRPs, the configuration comprising at least one CSI-RS pattern indicative of the CSI-RS resource in a time domain and a frequency domain;
receive, from the wireless communication node, N transmission occasions of the CSI-RS corresponding to the plurality of channels according to the configuration of the CSI-RS resource, wherein each of the N transmission occasions of the CSI-RS is transmitted in a same set of at least one symbol in a different slot, where N is an integer value greater than 1; and
determine measurement results based on the N transmission occasions of the CSI-RS according to the configuration of the CSI-RS resource.
19 . A wireless communication node, comprising: at least one processor configured to:
send, via a transmitter and via a plurality of transmission and reception points (TRPs), a configuration of a channel state information reference signal (CSI-RS) resource for measurement of a plurality of channels associated with the plurality of TRPs, the configuration comprising at least one CSI-RS pattern indicative of the CSI-RS resource in a time domain and a frequency domain; and
initiate, to a wireless communication device, transmission of N transmission occasions of the CSI-RS corresponding to the plurality of channels according to the configuration of the CSI-RS resource, wherein each of the N transmission occasions of the CSI-RS is transmitted in a same set of at least one symbol in a different slot, where N is an integer value greater than 1.