Channel state information reporting method and apparatus
摘要
說明書
Specifically, the terminal device receives only the DCI 2 sent by the base station 2, and a field (for example, a CSI request field) in the DCI 2 indicates the above CSI configuration, indicating that the base station 2 triggers the terminal device to report the above CSI. The field further indicates, from two NZP CSI-RS resource configurations associated with the CSI, an ID of an NPZ CSI-RS resource configuration and an ID of a CSI-IM resource configuration that are used for reporting the CSI, for example, a CSI-RS resource configuration 2 and a CSI-IM resource configuration 2.
The terminal device receives only the DCI 2 sent by the base station 2, meaning that only the base station 2 prepares to schedule data for the terminal device at a moment t+k. Therefore, the terminal device may perform measurement according to a single-base station transmission mechanism and report CSI. In this case, the terminal device needs to measure interference from all base stations except the base station 2. In L=2 CSI-IM resources of the CSI-IM configuration 2, CSI-IM 3 is a second-type CSI-IM resource that is used for measurement in single-base station transmission. Therefore, the terminal device may select the CSI-IM 3 as the target CSI-IM resource to measure required interference.
In addition, the terminal device may measure an NZP CSI-RS resource (NZP CSI-RS 2) in the NZP CSI-RS resource configuration 2 triggered by the DCI 2, and use the NZP CSI-RS resource as a target CSI-RS resource to measure a channel. The terminal device may calculate, by using measured channel information and interference information, a CQI when the base station 2 schedules data for the terminal device, and report the CQI to the base station.
