Reservation of HARQ-ACK resources in uplink control information in wireless communications

1. A method, comprising:

determining, by a processor of a user equipment (UE), how a hybrid automatic repeat request (HARQ) acknowledgment (HARQ-ACK) is to be transmitted to a network node of a wireless network;

reserving, by the processor, HARQ-ACK resources among a plurality of resource elements (REs) for a two-bit HARQ-ACK based on a result of the determining; and

transmitting, by the processor, the HARQ-ACK having zero bit, one bit or two bits to the network node in a physical uplink shared channel (PUSCH) using the reserved HARQ-ACK resources,

wherein the reserving comprises reserving a number of REs among the plurality of REs for a two-bit HARQ-ACK as if the HARQ-ACK is to be transmitted using two bits regardless of whether the determining indicates that no HARQ-ACK is to be transmitted or that the HARQ-ACK is to be transmitted using one bit or two bits of HARQ-ACK bits,

wherein the PUSCH is punctured for the HARQ-ACK such that a first part of information transmitted in the PUSCH is not punctured while a second part of the information transmitted in the PUSCH is punctured in case the HARQ-ACK is transmitted using one bit or two bits, and

wherein the second part of the information is based on the first part of the information.

2. The method of claim 1 , wherein the determining comprises:

determining that the HARQ-ACK is to be transmitted using zero bit, one bit or two bits of HARQ-ACK bits; and

calculating an amount of REs of the plurality of REs for the reserved HARQ-ACK resources assuming the HARQ-ACK to be a two-bit HARQ-ACK.

3. The method of claim 1 , wherein the reserving further comprises allocating the plurality of REs in an order as follows:

allocating a demodulation reference signal (DMRS);

reserving the HARQ-ACK resources among a remainder of the plurality of REs for a two-bit HARQ-ACK;

allocating a first number of REs among the remainder of the plurality of REs, excluding the HARQ-ACK resources, for a first part of channel state information (CSI);

allocating a second number of REs among the remainder of the plurality of REs, including the HARQ-ACK resources, for a second part of the CSI in an event that the second part of the CSI exists; and

allocating a third number of REs among the remainder of the plurality of REs, including any remaining reserved HARQ-ACK resources, for uplink shared channel (ULSCH) data.

4. A method, comprising:

reserving, by a processor of a user equipment (UE), hybrid automatic repeat request (HARQ) acknowledgement (HARQ-ACK) resources among a plurality of resource elements (REs) such that puncturing of a first part of channel state information (CSI) on a physical uplink shared channel (PUSCH) by a HARQ-ACK is avoided; and

transmitting, by the processor, the HARQ-ACK having zero bit, one bit or two bits as part of uplink control information (UCI) to a network node of a wireless network using the reserved HARQ-ACK resources,

wherein the reserving comprises reserving a number of REs among the plurality of REs for a two-bit HARQ-ACK as if the HARQ-ACK is to be transmitted using two bits regardless of whether the determining indicates that no HARQ-ACK is to be transmitted or that the HARQ-ACK is to be transmitted using one bit or two bits of HARQ-ACK bits,

wherein a second part of the CSI is punctured while the first part of the CSI is not punctured in case the HARQ-ACK is transmitted using one bit or two bits, and

wherein the second part of the CSI is based on the first part of the CSI.

5. The method of claim 4 , wherein the reserving of the HARQ-ACK resources further comprises:

calculating a number of REs of the plurality of REs used in transmitting the HARQ-ACK with two bits of information bits for the HARQ-ACK; and

reserving the calculated number of REs among the plurality of REs for the HARQ-ACK.

6. The method of claim 4 , wherein the reserving of the HARQ-ACK resources further comprises determining a number of information bits to be used in transmitting the HARQ-ACK on the PUSCH to be equal to or less than two bits.

7. The method of claim 4 , wherein the reserving of the HARQ-ACK resources for the two-bit HARQ-ACK further comprises allocating the plurality of REs in an order as follows:

allocating a demodulation reference signal (DMRS);

reserving the HARQ-ACK resources among a remainder of the plurality of REs for a two-bit HARQ-ACK;

allocating a first number of REs among the remainder of the plurality of REs, excluding the HARQ-ACK resources, for the first part of the CSI;

allocating a second number of REs among the remainder of the plurality of REs, including the HARQ-ACK resources, for the second part of the CSI in an event that the second part of the CSI exists; and

allocating a third number of REs among the remainder of the plurality of REs, including any remaining reserved HARQ-ACK resources, for uplink shared channel (ULSCH) data.

8. The method of claim 4 , wherein the reserving of the HARQ-ACK resources further comprises:

determining that the HARQ-ACK is to be transmitted using zero bit, one bit or two bits of HARQ-ACK bits; and

reserving an amount of REs of the plurality of REs equivalent to at least one orthogonal frequency-division multiplexing (OFDM) symbol.

9. An apparatus, comprising:

a transceiver capable of communicating with a network node of a wireless network; and

a processor coupled to control the transceiver, the processor capable of:

reserving hybrid automatic repeat request (HARQ) acknowledgement (HARQ-ACK) resources among a plurality of resource elements (REs) such that puncturing of channel state information (CSI) on a physical uplink shared channel (PUSCH) by a HARQ-ACK is avoided; and

transmitting, via the transceiver, the HARQ-ACK having zero bit, one bit or two bits as part of uplink control information (UCI) to the network node using the reserved HARQ-ACK resources,

wherein, in reserving, the processor is configured to reserve a number of REs among the plurality of REs for a two-bit HARQ-ACK as if the HARQ-ACK is to be transmitted using two bits regardless of whether the determining indicates that no HARQ-ACK is to be transmitted or that the HARQ-ACK is to be transmitted using one bit or two bits of HARQ-ACK bits,

wherein a second part of the CSI is punctured while the first part of the CSI is not punctured in case the HARQ-ACK is transmitted using one bit or two bits, and

wherein the second part of the CSI is based on the first part of the CSI.

10. The apparatus of claim 9 , wherein, in reserving the HARQ-ACK resources, the processor is further configured to perform operations comprising:

calculating a number of REs of the plurality of REs used in transmitting the HARQ-ACK with two bits of information bits for the HARQ-ACK; and

reserving the calculated number of REs among the plurality of REs for the HARQ-ACK.

11. The apparatus of claim 9 , wherein, in reserving the HARQ-ACK resources, the processor is further configured to determine a number of information bits to be used in transmitting the HARQ-ACK on the PUSCH to be equal to or less than two bits.

12. The apparatus of claim 9 , wherein, in reserving the HARQ-ACK resources for the two-bit HARQ-ACK, the processor is further configured to allocate the plurality of REs in an order as follows:

allocating a demodulation reference signal (DMRS);

reserving the HARQ-ACK resources among a remainder of the plurality of REs for a two-bit HARQ-ACK;

allocating a first number of REs among the remainder of the plurality of REs, excluding the HARQ-ACK resources, for the first part of the CSI;

allocating a second number of REs among the remainder of the plurality of REs, including the HARQ-ACK resources, for the second part of the CSI in an event that the second part of the CSI exists; and

allocating a third number of REs among the remainder of the plurality of REs, including any remaining reserved HARQ-ACK resources, for uplink shared channel (ULSCH) data.

13. The apparatus of claim 9 , wherein, in reserving the HARQ-ACK resources, the processor is further configured to perform operations comprising:

determining that the HARQ-ACK is to be transmitted using zero bit, one bit or two bits of HARQ-ACK bits; and

reserving an amount of REs of the plurality of REs equivalent to at least one orthogonal frequency-division multiplexing (OFDM) symbol.