Method and apparatus for reporting channel state information (csi) in a wireless communication system

Patent metadata

Field	Value
Publication number	US-2025038919-A1
Application number	US-202418785050-A
Country	US
Kind code	A1
Filing date	Jul 26, 2024
Priority date	Jul 28, 2023
Publication date	Jan 30, 2025
Grant date	—

Abstract

A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives an indication of an adaptation associated with Channel State Information Reference Signal (CSI-RS), wherein the adaptation is associated with switching from a first number of ports to a second number of ports, and the UE is configured with a plurality of CSI-RS resources for deriving a Channel State Information (CSI) report. The UE determines whether to transmit the CSI report based on whether the UE receives a CSI-RS associated with the second number of ports.

First claim

1 . A method of a User Equipment (UE), comprising:
receiving an indication of an adaptation associated with Channel State Information Reference Signal (CSI-RS), wherein:
the adaptation is associated with switching from a first number of ports to a second number of ports; and
the UE is configured with a plurality of CSI-RS resources for deriving a Channel State Information (CSI) report; and
determining whether to transmit the CSI report based on whether the UE receives a CSI-RS associated with the second number of ports.

2 . The method of claim 1 , comprising:
in response to receiving one or more first CSI-RSs that are associated with the second number of ports, at least one of:
deriving the CSI report based on the one or more first CSI-RSs; or
transmitting the CSI report.

3 . The method of claim 1 , wherein:
the UE determines not to transmit the CSI report in response to not receiving a CSI-RS that is associated with the second number of ports.

4 . The method of claim 1 , wherein:
the first number of ports is larger than the second number of ports.

5 . The method of claim 1 , wherein:
the first number of ports is smaller than the second number of ports.

6 . The method of claim 1 , wherein:
the plurality of CSI-RS resources are associated with channel measurement.

7 . The method of claim 1 , wherein:
the first number of ports is associated with a first sub-configuration.

8 . The method of claim 1 , wherein:
the second number of ports is associated with a second sub-configuration.

9 . The method of claim 1 , wherein:
the UE receives the indication from a base station.

10 . A method of a base station, comprising:
transmitting, to a User Equipment (UE), an indication of an adaptation associated with Channel State Information Reference Signal (CSI-RS), wherein the adaptation is associated with switching from a first number of ports to a second number of ports; configuring the UE with a plurality of CSI-RS resources for deriving a Channel State Information (CSI) report; and determining whether to receive the CSI report based on whether the UE receives a CSI-RS associated with the second number of ports.

11 . The method of claim 10 , comprising:
based on a determination that the UE received one or more first CSI-RSs that are associated with the second number of ports, at least one of:
monitoring for the CSI report; or
receiving the CSI report.

12 . The method of claim 10 , wherein:
the base station determines not to at least one of monitor for or receive the CSI report based on a determination that the UE did not receive a CSI-RS that is associated with the second number of ports.

13 . The method of claim 10 , wherein:
the first number of ports is larger than the second number of ports.

14 . The method of claim 10 , wherein:
the first number of ports is smaller than the second number of ports.

15 . The method of claim 10 , wherein:
the plurality of CSI-RS resources are associated with channel measurement.

16 . The method of claim 10 , wherein:
the first number of ports is associated with a first sub-configuration.

17 . The method of claim 10 , wherein:
the second number of ports is associated with a second sub-configuration.

18 . A User Equipment (UE) comprising:
a control circuit; a processor installed in the control circuit; and a memory installed in the control circuit and operatively coupled to the processor, wherein the processor is configured to execute a program code stored in the memory to perform operations, the operations comprising:
receiving an indication of an adaptation associated with Channel State Information Reference Signal (CSI-RS), wherein:
the adaptation is associated with switching from a first number of ports to a second number of ports; and
the UE is configured with a plurality of CSI-RS resources for deriving a CSI report; and

determining whether to transmit the CSI report based on whether the UE receives a CSI-RS associated with the second number of ports.

19 . The UE of claim 18 , the operations comprising:
in response to receiving one or more first CSI-RSs that are associated with the second number of ports, at least one of:
deriving the CSI report based on the one or more first CSI-RSs; or
transmitting the CSI report.

20 . The UE of claim 18 , wherein:
the UE determines not to transmit the CSI report in response to not receiving a CSI-RS that is associated with the second number of ports.

Assignees

• Asus Technology Licensing Inc

Inventors

• Lin Ko-Chiang

Classifications

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04B7/0413

  MIMO systems · CPC title

• H04B7/086

  using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title