Channel state information and hybrid automatic repeat request feedback resource allocation in 5G

1. A method of wireless communication performed by a user equipment (UE) for uplink transmission in a slot, comprising:

mapping channel state information (CSI) to first resource elements that are distributed in frequency,

wherein the first resource elements are in a set of resources allocated on an uplink shared channel, and

wherein the first resource elements occupy at least a first orthogonal frequency division multiplexing (OFDM) symbol of the uplink shared channel;

mapping hybrid automatic repeat request (HARQ) feedback to second resource elements that are distributed in frequency,

wherein the second resource elements are in the set of resources,

wherein the second resource elements are reserved for the HARQ feedback and are different from the first resource elements,

wherein the first resource elements and the second resource elements are distributed in frequency based at least in part on respective step sizes for the CSI and the HARQ feedback,

wherein a step size associated with the first resource elements is based at least in part on a quantity of modulated symbols of the CSI and a quantity of available subcarriers at the first OFDM symbol, and

wherein a demodulation reference signal (DMRS) is provided in a second OFDM symbol of the uplink shared channel, and the first resource elements and the second resource elements occupy one or more OFDM symbols of the uplink shared channel that do not include the second OFDM symbol; and

transmitting the CSI and the HARQ feedback on the uplink shared channel in accordance with the mappings.

2. The method of claim 1 , wherein the step size associated with the first resource elements is one when an amount of CSI to be mapped, comprising the quantity of modulated symbols of the CSI, is greater than or equal to the quantity of available subcarriers of the first OFDM symbol.

3. The method of claim 1 , wherein the CSI and the HARQ feedback are transmitted using OFDM with a cyclic prefix (CP) (CP-OFDM) or discrete Fourier transform spread OFDM (DFT-s-OFDM).

4. The method of claim 1 , wherein the mapping of the CSI is performed in a frequency-first, time-second manner.

5. The method of claim 1 , wherein the mapping of the HARQ feedback is performed in a frequency-first, time-second manner.

6. The method of claim 1 , wherein the one or more OFDM symbols, occupied by the second resource elements, are located after the second OFDM symbol in the slot.

7. The method of claim 1 , wherein a step size associated with the second resource elements is based at least in part on a quantity associated with the HARQ feedback and a quantity of subcarriers in the uplink shared channel.

8. The method of claim 1 , further comprising:

mapping another CSI to third resource elements occupying a third OFDM symbol of the uplink shared channel.

9. A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors, coupled to the memory, configured to:

map channel state information (CSI) to first resource elements that are distributed in frequency,

wherein the first resource elements are in a set of resources allocated on an uplink shared channel, and

wherein the first resource elements occupy at least a first orthogonal frequency division multiplexing (OFDM) symbol of the uplink shared channel;

map hybrid automatic repeat request (HARQ) feedback to second resource elements that are distributed in frequency,

wherein the second resource elements are in the set of resources,

wherein the second resource elements are reserved for the HARQ feedback and are different from the first resource elements,

wherein the first resource elements and the second resource elements are distributed in frequency based at least in part on respective step sizes for the CSI and the HARQ feedback,

wherein a step size associated with the first resource elements is based at least in part on a quantity of modulated symbols of the CSI and a quantity of available subcarriers at the first OFDM symbol, and

wherein a demodulation reference signal (DMRS) is provided in a second OFDM symbol of the uplink shared channel, and the first resource elements and the second resource elements occupy one or more OFDM symbols of the uplink shared channel that do not include the second OFDM symbol; and

transmit the CSI and the HARQ feedback on the uplink shared channel in accordance with the mappings.

10. The UE of claim 9 , wherein the step size associated with the first resource elements is one when an amount of CSI to be mapped, comprising the quantity of modulated symbols of the CSI, is greater than or equal to the quantity of available subcarriers of the first OFDM symbol.

11. The UE of claim 9 , wherein the CSI and the HARQ feedback are transmitted using OFDM with a cyclic prefix (CP) (CP-OFDM) or discrete Fourier transform spread OFDM (DFT-s-OFDM).

12. The UE of claim 9 , wherein the CSI is mapped in a frequency-first, time-second manner.

13. The UE of claim 9 , wherein the HARQ feedback is mapped in a frequency-first, time-second manner.

14. The UE of claim 9 , wherein the one or more OFDM symbols, occupied by the second resource elements, are located after the second OFDM symbol in a slot.

15. The UE of claim 9 , wherein a step size associated with the second resource elements is based at least in part on a quantity associated with the HARQ feedback and a quantity of subcarriers in the uplink shared channel.

16. The UE of claim 9 , wherein the one or more processors are further configured to:

map another CSI to third resource elements occupying a third OFDM symbol of the uplink shared channel.

17. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:

map channel state information (CSI) to first resource elements that are distributed in frequency,

wherein the first resource elements are in a set of resources allocated on an uplink shared channel, and

wherein the first resource elements occupy at least a first orthogonal frequency division multiplexing (OFDM) symbol of the uplink shared channel;

map hybrid automatic repeat request (HARQ) feedback to second resource elements that are distributed in frequency,

wherein the second resource elements are in the set of resources,

wherein the second resource elements are reserved for the HARQ feedback and are different from the first resource elements,

wherein the first resource elements and the second resource elements are distributed in frequency based at least in part on respective step sizes for the CSI and the HARQ feedback,

wherein a respective step size associated with the first resource elements is based at least in part on a quantity of modulated symbols of the CSI and a quantity of available subcarriers at the first OFDM symbol, and

wherein a demodulation reference signal (DMRS) is provided in a second OFDM symbol of the uplink shared channel, and the first resource elements and the second resource elements occupy one or more OFDM symbols of the uplink shared channel that do not include the second OFDM symbol; and

transmit the CSI and the HARQ feedback on the uplink shared channel in accordance with the mappings.

18. The non-transitory computer-readable medium of claim 17 , wherein the respective step size associated with the first resource elements is one when an amount of CSI to be mapped, comprising the quantity of modulated symbols of the CSI, is greater than or equal to the quantity of available subcarriers of the first OFDM symbol.

19. The non-transitory computer-readable medium of claim 17 , wherein the CSI and the HARQ feedback are transmitted using OFDM with a cyclic prefix (CP) (CP-OFDM) or discrete Fourier transform spread OFDM (DFT-s-OFDM).

20. The non-transitory computer-readable medium of claim 17 , wherein the CSI is mapped in a frequency-first, time-second manner.

21. The non-transitory computer-readable medium of claim 17 , wherein the HARQ feedback is mapped in a frequency-first, time-second manner.

22. The non-transitory computer-readable medium of claim 17 , wherein the one or more OFDM symbols, occupied by the second resource elements, are located after the second OFDM symbol in a slot.

23. The non-transitory computer-readable medium of claim 17 , wherein a step size associated with the second resource elements is based at least in part on a quantity associated with the HARQ feedback and a quantity of subcarriers in the uplink shared channel.

24. The non-transitory computer-readable medium of claim 17 , wherein the one or more instructions further cause the UE to:

map another CSI to third resource elements occupying a third OFDM symbol of the uplink shared channel.

25. An apparatus for wireless communication, comprising:

means for mapping channel state information (CSI) to first resource elements that are distributed in frequency,

wherein the first resource elements are in a set of resources allocated on an uplink shared channel, and

wherein the first resource elements occupy at least a first orthogonal frequency division multiplexing (OFDM) symbol of the uplink shared channel;

means for mapping hybrid automatic repeat request (HARQ) feedback to second resource elements that are distributed in frequency,

wherein the second resource elements are in the set of resources,

wherein the second resource elements are reserved for the HARQ feedback and are different from the first resource elements,

wherein the first resource elements and the second resource elements are distributed in frequency based at least in part on respective step sizes for the CSI and the HARQ feedback,

wherein a respective step size associated with the first resource elements is based at least in part on a quantity of modulated symbols of the CSI and a quantity of available subcarriers at the first OFDM symbol, and

wherein a demodulation reference signal (DMRS) is provided in a second OFDM symbol of the uplink shared channel, and the first resource elements and the second resource elements occupy one or more OFDM symbols of the uplink shared channel that do not include the second OFDM symbol; and

means for transmitting the CSI and the HARQ feedback on the uplink shared channel in accordance with the mappings.

26. The apparatus of claim 25 , wherein the respective step size associated with the first resource elements is one when an amount of CSI to be mapped, comprising the quantity of modulated symbols of the CSI, is greater than or equal to the quantity of available subcarriers of the first OFDM symbol.

27. The apparatus of claim 25 , wherein the CSI and the HARQ feedback are transmitted using OFDM with a cyclic prefix (CP) (CP-OFDM) or discrete Fourier transform spread OFDM (DFT-s-OFDM).

28. The apparatus of claim 25 , wherein the means for mapping the CSI is performed in a frequency-first, time-second manner.

29. The apparatus of claim 25 , wherein the means for mapping the HARQ feedback is performed in a frequency-first, time-second manner.

30. The apparatus of claim 25 , wherein the one or more OFDM symbols, occupied by the second resource elements, are located after the second OFDM symbol in a slot.

31. The method of claim 1 , wherein the HARQ feedback is mapped to the second resource elements before mapping the CSI to the first resource elements.

32. The method of claim 31 , wherein the CSI is not mapped to the second resource elements.

33. The UE of claim 9 , wherein the one or more processors, to map the HARQ feedback to the second resource elements, are configured to:

map the HARQ feedback to the second resource elements before mapping the CSI to the first resource elements.

34. The UE of claim 33 , wherein the one or more processors, to map the CSI to the first resource elements, are configured to:

map the CSI to the first resource elements and not to the second resource elements.