CSI reporting enhancements for type II codebook

1 . A processor of a user equipment (UE) configured to perform operations comprising:

reporting, to a base station, a processing capability for type II codebook comprising one or more sets of parameters, each set of parameters comprising a maximum number of ports for channel state information (CSI)-reference signal (RS), a maximum number of CSI-RS resources, and a maximum total number of ports;

receiving CSI configuration information for reporting type II codebook based CSI feedback;

generating the type II codebook based CSI feedback;

receiving CSI measurement resources; and

transmitting the type II codebook CSI feedback to a base station.

2 . The processor of claim 1 , wherein the type II codebook based CSI feedback includes a CSI report comprising at least one of but less than all of a spatial basis precoding matrix indicator (PMI) reporting component, a frequency basis PMI reporting component and a combination coefficient PMI reporting component.

3 . The processor of claim 1 , wherein the type II codebook based CSI feedback comprises periodic or semi-persistent feedback and transmitting the type II codebook based CSI feedback further comprises:

transmitting CSI comprising each of a spatial basis precoding matrix indicator (PMI) reporting component, a frequency basis PMI reporting component and a combination coefficient PMI reporting component with a first periodicity; and

transmitting CSI comprising only one or a subset of the spatial basis PMI reporting component, the frequency basis PMI reporting component and the combination coefficient PMI reporting component with a second periodicity, wherein the first periodicity is larger than the second periodicity.

4 . The processor of claim 1 , wherein the type II codebook based CSI feedback comprises periodic or semi-persistent feedback and transmitting the type II codebook based CSI feedback further comprises:

transmitting CSI comprising a first subset from a spatial basis precoding matrix indicator (PMI) reporting component, a frequency basis PMI reporting component and a combination coefficient PMI reporting component with a first periodicity; and

transmitting CSI comprising a second subset from the spatial basis PMI reporting component, the frequency basis PMI reporting component and the combination coefficient PMI reporting component, wherein the first subset and the second subset include different PMI reporting components.

5 . The processor of claim 1 , wherein the operations further comprise:

receiving a radio resource control (RRC) message comprising a type II codebook based CSI feedback configuration, wherein the configuration indicates how the base station interprets the type II codebook based CSI feedback including a CSI report comprising an indication that a value of a precoder matrix indicator (PMI) reporting component is a same value as a previously transmitted CSI report.

6 . The processor of claim 1 , wherein the type II codebook based CSI feedback utilizes time domain differential encoding for a precoder matrix indicator (PMI) reporting component for of a CSI report and wherein the time domain differential encoding indicates a difference between a current measurement and a previous measurement reported in a previous CSI report.

7 . The processor of claim 1 , wherein the UE is configured to report a PMI using a differential reporting technique based on W gNB (k+1)=W gNB (k)*W UE (k+1), wherein W gNB (k) represents a resultant precoder recommended by the UE to the base station at time instance (k) and W UE (k) represents a differential precoder the UE reports to the base station at time instance (k).

8 . The processor of claim 1 , wherein the type II codebook based CSI feedback is for a high speed UE mobility scenario.

9 . The processor of claim 1 , wherein the type II codebook based CSI feedback is configured for open-loop or semi-open-loop CSI reporting for one or more precoding matrix indicator (PMI) reporting components.

10 . The processor of claim 1 , the operations further comprising:

transmitting, prior to receiving the CSI configuration information, a signal to the base station recommending that a timeRestrictionforChannelMeaurement information element (IE) and timeRestrictionforInterferenceMeaurement IE are set to configured in the CSI configuration information.

11 . The processor of claim 1 , wherein the CSI report is transmitted on uplink control information (UCI) on a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

12 . The processor of claim 1 , the operations further comprising:

transmitting a UE preferred CSI report settings to the base station in response to a predetermined condition related to UE mobility.

13 . The processor of claim 1 , wherein the CSI configuration information includes a reportQuantity information element (IE) that separately configures different report quantities.

14 . The processor of claim 1 , wherein the CSI configuration information includes a reportQuantity information element (IE) that separately configures one or more of spatial basis precoding matrix indicator (PMI) reporting component, a frequency basis PMI reporting component and a combination coefficient PMI reporting component.

15 . The processor of claim 1 , wherein when the UE is configured to perform time domain filtering for PMI, a number of CSI processing units (CPUs) to be counted is based on the reportQuantity IE.

16 . The processor of claim 1 , wherein when the UE is configured to perform time domain filtering for PMI, the number of active CSI-reference signal (RS) to be counted is based on the reportQuantity_IE.

17 . A processor of a base station configured to perform operations comprising:

receiving, from a user equipment (UE), a processing capability for type II codebook comprising one or more sets of parameters, each set of parameters comprising a maximum number of ports for channel state information (CSI)-reference signal (RS), a maximum number of CSI-RS resources, and a maximum total number of ports;

generating, for transmission to the UE, CSI configuration information for the UE to report type II codebook based CSI feedback; and

receiving the type II codebook CSI feedback from the UE.

18 . The processor of claim 17 , wherein the type II codebook based CSI feedback includes a CSI report comprising less than all of a spatial basis precoding matrix indicator (PMI) reporting component, a frequency basis PMI reporting component and a combination coefficient PMI reporting component.

19 . The processor of claim 17 , wherein the type II codebook based CSI feedback comprises periodic or semi-persistent feedback and receiving the type II codebook based CSI feedback further comprises:

receiving CSI comprising each of a spatial basis precoding matrix indicator (PMI) reporting component, a frequency basis PMI reporting component and a combination coefficient PMI reporting component with a first periodicity; and

receiving CSI comprising only one or a subset of the spatial basis PMI reporting component, the frequency basis PMI reporting component and the combination coefficient PMI reporting component with a second periodicity, wherein the first periodicity is larger than the second periodicity.