Precoding resource block group bundling enhancement for full dimension multi-in-multi-output

1. One or more non-transitory, machine-readable media having instructions that, when executed by one or more processors, cause an evolved node B (“eNB”) to:

configure a plurality of precoding granularities at a user equipment (“UE”);

determine a precoding granularity from the plurality of precoding granularities based on one or more parameters of a physical downlink shared channel (“PDSCH”) scheduling decision;

transmit an indication of the precoding granularity to the UE; and

transmit a PDSCH using the precoding granularity,

wherein to determine the precoding granularity is to determine one of:

a larger precoding granularity, corresponding to a smaller precoding resource block group (PRG) size, for a downlink control information (DCI) format 1A or 1C transmission; or

a smaller precoding granularity, corresponding to a larger PRG size, for PDSCH scheduling corresponding to a transmission for a single user (SU) or full dimension (FD) multiple input multiple output (MIMO).

2. The one or more non-transitory, machine-readable media of claim 1 , wherein the instructions, when executed, further cause the eNB to: transmit the indication using downlink control information signaling.

3. The one or more non-transitory, machine-readable media of claim 1 , wherein the instructions, when executed, further cause the eNB to:

configure the plurality of precoding granularities using radio resource control signaling.

4. The one or more non-transitory, machine-readable media of claim 1 , wherein the precoding granularity is a first precoding granularity and, for a system bandwidth that includes 64-110 resource blocks in a downlink channel, the first precoding granularity is to provide a precoding resource block group (“PRG”) of four physical resource blocks and a second precoding granularity of the plurality of precoding granularities is to provide a PRG of two physical resource blocks.

5. The one or more non-transitory, machine-readable media of claim 4 , wherein the PDSCH scheduling is a first PDSCH scheduling; the indication is a first indication;

the PDSCH is a first PDSCH; and the instructions, when executed, further cause the eNB to:

determine the second precoding granularity based on a second PDSCH scheduling;

transmit a second indication of the second precoding granularity to the UE; and

transmit a second PDSCH using the second precoding granularity.

6. The one or more non-transitory, machine-readable media of claim 1 , wherein to determine the precoding granularity based on the PDSCH scheduling, the eNB is to:

determine that downlink control information (“DCI”) format 2A, 2B, 2C, or 2D is to schedule the PDSCH; and

determine the precoding granularity based on the determination that DCI format 2A,2B, 2C, or 2D is to schedule the PDSCH.

7. An evolved node B (“eNB”) comprising:

control circuitry to:

generate a radio resource control (“RRC”) message that includes configuration information to configure a plurality of precoding granularities at a user equipment (“UE”);

determine a precoding granularity from the plurality of precoding granularities based on one or more parameters of a physical downlink shared channel (“PDSCH”) scheduling decision;

generate downlink control information (“DCI”) to include an indication of the precoding granularity; and

generate a PDSCH using the precoding granularity; and

transmit circuitry, coupled with the control circuitry, to transmit the RRC message, DCI, and PDSCH to the UE,

wherein to determine the precoding granularity is to determine one of:

a larger precoding granularity, corresponding to a smaller precoding resource block group (PRG) size, for a downlink control information (DCI) format PDSCH 1A or 1C transmission; or

a smaller precoding granularity, corresponding to a larger PRG size, for PDSCH scheduling corresponding to a transmission for a single user (SU) or full dimension (FD) multiple input multiple output (MIMO).

8. The eNB claim 7 , wherein the precoding granularity is a first precoding granularity and, for a system bandwidth that includes 64-110 resource blocks in a downlink channel, the first precoding granularity is to provide a precoding resource block group (“PRG”) of four physical resource blocks and a second precoding granularity of the plurality of precoding granularities is to provide a PRG of two physical resource blocks.

9. The eNB of claim 8 , wherein the PDSCH scheduling is a first PDSCH scheduling; the indication is a first indication; the PDSCH is a first PDSCH; and the control circuitry is further to:

determine the second precoding granularity based on a second PDSCH scheduling;

generate second DCI to include a second indication of the second precoding granularity to the UE; and

generate a second PDSCH using the second precoding granularity.

10. The eNB of claim 7 , wherein to determine the precoding granularity based on the PDSCH scheduling the eNB is to:

determine that downlink control information (“DCI”) format 2A, 2B, 2C, or 2D is to schedule the PDSCH; and

determine the precoding granularity based on the determination that DCI format 2A, 2B, 2C, or 2D is to schedule the PDSCH.

11. The one or more non-transitory, machine-readable media of claim 1 , wherein the instructions, when executed, further cause the eNB to: determine a

corresponding PRG size to the precoding granularity based on the one or more parameters of the PDSCH scheduling decision.

12. The one or more non-transitory, machine-readable media of claim 1 , wherein the instructions, when executed, further cause the eNB to determine a smaller precoding granularity for a PDSCH scheduling for DCI formats 2A, 2B, 2C or 2D.

13. The one or more non-transitory, machine-readable media of claim 1 , wherein the instructions, when executed, further cause the eNB to determine a larger precoding granularity for a PDSCH transmission in multimedia broadcast single frequency network (MBSFN) subframes.

14. The eNB of claim 7 , wherein the control circuitry is further to determine a corresponding PRG size to the precoding granularity based on the one or more parameters of the PDSCH scheduling decision.

15. The eNB of claim 7 , wherein the control circuitry is further to determine a smaller precoding granularity for a PDSCH scheduling for DCI formats 2A, 2B, 2C or 2D.

16. The eNB of claim 7 , wherein the control circuitry is further to determine a larger precoding granularity for a PDSCH transmission in MBSFN subframes.