User equipment (UE), generation node-B (GNB) and methods for signaling of control information for pre-coding

1. An apparatus, comprising:

memory; and

processing circuitry, configured to:

decode, from a base station, control signaling that indicates:

a first pre-coding matrix indicator (PMI) that indicates a first pre-coder for a first sub-band,

a second PMI that indicates a second pre-coder for a second sub-band, and

additional PMIs that indicate additional pre-coders for transmission in a second carrier in accordance with a carrier aggregation (CA) arrangement,

wherein the first and second pre-coders are included in predetermined candidate pre-coders, wherein the first and second sub-bands are included in a first carrier, and wherein the first and second PMIs indicate the first and second pre-coders for transmission of a physical uplink shared channel (PUSCH) block in the first carrier in accordance with the CA arrangement;

store the first and second PMIs in the memory;

encode a physical uplink shared channel (PUSCH) block for transmission;

scale the PUSCH block in the first sub-band by the first pre-coder; and

scale the PUSCH block in the second sub-band by the second pre-coder.

2. The apparatus according to claim 1 ,

the processing circuitry further configured to:

map, to resources elements (REs) of the first sub-band for orthogonal frequency division multiplexing (OFDM) transmission, symbols of the PUSCH block scaled by the first pre-coder; and

map, to REs of the second sub-band for OFDM transmission, symbols of the PUSCH block scaled by the second pre-coder.

3. The apparatus according to claim 1 ,

wherein the control signaling further indicates one or more sub-band sizes of the first and second sub-bands.

4. The apparatus according to claim 1 ,

wherein:

the first and second sub-bands are included in a carrier that comprises a plurality of sub-bands,

the sub-bands of the plurality are of a predetermined sub-band size, and

the sub-bands of the plurality are located at predetermined locations within the carrier.

5. The apparatus according to claim 1 ,

wherein the control signaling is included in downlink control information (DCI), a medium access control (MAC) control element (CE) and/or radio resource control (RRC) signaling.

6. The apparatus according to claim 1 ,

wherein:

the base station is a server base station,

the first and second PMIs indicate the first and second pre-coders for transmission of the PUSCH block to the server base station as part of a coordinated multi-point (CoMP) transmission, and

the control signaling is configurable to further indicate additional PMIs that indicate additional pre-coders for transmission of the PUSCH block to an assistant base station as part of the CoMP transmission.

7. The apparatus according to claim 6 ,

wherein:

the assistant base station is included in candidate assistant base stations, and

the control signaling further includes an index that indicates the assistant base station.

8. The apparatus according to claim 1 ,

wherein:

the second carrier is included in candidate carriers, and

the control signaling further includes an index that indicates the second carrier.

9. The apparatus according to claim 1 ,

the processing circuitry further configured to:

decode an orthogonal frequency division multiplexing (OFDM) signal from the base station that includes a physical downlink shared channel (PDSCH) multiplexed with the control signaling.

10. The apparatus according to claim 1 ,

wherein:

the control signaling is configurable to include at least one additional PMI that indicates an additional pre-coder for an additional sub-band, and

the processing circuitry is further configured to scale the PUSCH block in the additional sub-band by the additional pre-coder.

11. The apparatus according to claim 1 ,

wherein the apparatus further includes a transceiver to receive the control signal and to transmit the PUSCH block.

12. The apparatus according to claim 1 ,

wherein the processing circuitry includes a baseband processor to decode the control signaling and to encode the PUSCH block.

13. A non-transitory computer-readable storage medium that stores instructions executable by one or more processors to cause a User Equipment (UE) to:

decode, from a base station, control signaling that indicates:

a first pre-coding matrix indicator (PMI) that indicates a first pre-coder for a first sub-band,

a second PMI that indicates a second pre-coder for a second sub-band,

additional PMIs that indicate additional pre-coders for transmission in a second carrier in accordance with a carrier aggregation (CA) arrangement,

wherein the first and second pre-coders are included in predetermined candidate pre-coders, wherein the first and second sub-bands are included in a first carrier, and wherein the first and second PMIs indicate the first and second pre-coders for transmission of a physical uplink shared channel (PUSCH) block in the first carrier in accordance with the CA arrangement;

store the first and second PMIs in memory;

encode a physical uplink shared channel (PUSCH) block for transmission;

scale the PUSCH block in the first sub-band by the first pre-coder; and

scale the PUSCH block in the second sub-band by the second pre-coder.

14. The non-transitory computer-readable storage medium according to claim 13 ,

wherein the instructions are further executable by one or more processors to cause the UE to:

map, to resources elements (REs) of the first sub-band for orthogonal frequency division multiplexing (OFDM) transmission, symbols of the PUSCH block scaled by the first pre-coder; and

map, to REs of the second sub-band for OFDM transmission, symbols of the PUSCH block scaled by the second pre-coder.

15. The non-transitory computer-readable storage medium according to claim 13 ,

wherein the control signaling further indicates one or more sub-band sizes of the first and second sub-bands.

16. The non-transitory computer-readable storage medium according to claim 13 ,

wherein the first and second sub-bands are included in a carrier that comprises a plurality of sub-bands;

wherein the sub-bands of the plurality are of a predetermined sub-band size; and

wherein the sub-bands of the plurality are located at predetermined locations within the carrier.

17. The non-transitory computer-readable storage medium according to claim 13 ,

wherein the control signaling is included in downlink control information (DCI), a medium access control (MAC) control element (CE) and/or radio resource control (RRC) signaling.

18. A User Equipment (UE), comprising:

at least one antenna;

at least one radio, wherein the at least one radio is configured to perform cellular communication;

one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform voice and/or data communications;

wherein the one or more processors are configured to cause the UE to:

decode, from a base station, control signaling that indicates:

a first pre-coding matrix indicator (PMI) that indicates a first pre-coder for a first sub-band, and

a second PMI that indicates a second pre-coder for a second sub-band,

additional PMIs that indicate additional pre-coders for transmission in a second carrier in accordance with a carrier aggregation (CA) arrangement,

wherein the first and second pre-coders are included in predetermined candidate pre-coders, wherein the first and second sub-bands are included in a first carrier, and wherein the first and second PMIs indicate the first and second pre-coders for transmission of a physical uplink shared channel (PUSCH) block in the first carrier in accordance with the CA arrangement;

store the first and second PMIs in memory;

encode a physical uplink shared channel (PUSCH) block for transmission;

scale the PUSCH block in the first sub-band by the first pre-coder; and

scale the PUSCH block in the second sub-band by the second pre-coder.

19. The UE according to claim 18 ,

wherein the base station is a server base station;

wherein the first and second PMIs indicate the first and second pre-coders for transmission of the PUSCH block to the server base station as part of a coordinated multi-point (CoMP) transmission; and

wherein the control signaling is configurable to further indicate additional PMIs that indicate additional pre-coders for transmission of the PUSCH block to an assistant base station as part of the CoMP transmission.

20. The UE according to claim 19 ,

wherein the assistant base station is included in candidate assistant base station, and

wherein the control signaling further includes an index that indicates the assistant base station.

21. The UE according to claim 18 ,

wherein the second carrier is included in candidate carriers, and

wherein the control signaling further includes an index that indicates the second carrier.

22. The non-transitory computer-readable storage medium according to claim 13 ,

wherein the second carrier is included in candidate carriers, and

wherein the control signaling further includes an index that indicates the second carrier.