Enhanced PUCCH format 0 and format 1 design for new radio unlicensed spectrum operation

1 . A method, comprising:

mapping, by a processor of an apparatus, a plurality of mutually orthogonal sequences to each of a plurality of physical resource blocks (PRBs) within an interlace; and

performing, by the processor, a physical uplink control channel (PUCCH) transmission in a New Radio unlicensed spectrum (NR-U),

wherein the mapping of the plurality of mutually orthogonal sequences to each of the plurality of PRBs within the interlace comprises:

cycling through the plurality of mutually orthogonal sequences with a non-zero interval to result in a set of non-repeating sequences selected from the plurality of mutually orthogonal sequences with the non-zero interval between every two adjacent sequences in the set; and

mapping the set of non-repeating sequences to the plurality of PRBs within the interlace, and

wherein the non-zero interval comprises a number relatively prime or co-prime to 12.

2 . The method of claim 1 , wherein the non-zero interval is equal to 5.

3 . The method of claim 1 , wherein the mapping of the plurality of mutually orthogonal sequences to each of the plurality of PRBs within the interlace comprises mapping 12 mutually orthogonal sequences to each of 10 PRBs within the interlace.

4 . The method of claim 1 , further comprising:

receiving, by the processor, an assignment of a set of sequences for each PRB of the plurality of PRBs from a wireless network; and

performing, by the processor, an uplink control information (UCI) transmission in the PUCCH in the NR-U.

5 . The method of claim 4 , wherein the receiving of the assignment of the set of sequences for each PRB of the plurality of PRBs comprises receiving the assignment of four sequences for each PRB of the plurality of PRBs to represent {00, 01, 10, 11}, wherein different PRBs of the plurality of PRBs have different sequences from the set of sequences within the interlace, and wherein the performing of the UCI transmission comprises transmitting a two-bit UCI.

6 . The method of claim 4 , wherein the receiving of the assignment of the set of sequences for each PRB of the plurality of PRBs comprises receiving the assignment of two sequences for each PRB of the plurality of PRBs to represent {0, 1}, wherein different PRBs of the plurality of PRBs have different sequences from the set of sequences within the interlace, and wherein the performing of the UCI transmission comprises transmitting a one-bit UCI.

7 . The method of claim 5 , wherein the receiving of the assignment of the set of sequences for each PRB of the plurality of PRBs comprises receiving the assignment of two sequences for each PRB of the plurality of PRBs to represent {0, 1}, wherein different PRBs of the plurality of PRBs have different sequences from the set of sequences within the interlace, and wherein the performing of the UCI transmission comprises transmitting a two-bit UCI.

8 . The method of claim 7 , wherein the transmitting of the two-bit UCI comprises transmitting the two-bit UCI by using a (10, 2) binary code to carry the two-bit UCI.

9 . The method of claim 7 , wherein the transmitting of the two-bit UCI comprises:

for each of four permutations of two bits comprising 00, 01, 10 and 11 for the two-bit UCI, cycling through the set of sequences with a respective non-zero interval to result in a subset of non-repeating sequences selected from the set of sequences with the respective non-zero interval between every two adjacent sequences in the subset; and

transmitting the subset of non-repeating sequences as the two-bit UCI.

10 . The method of claim 9 , wherein the respective non-zero interval comprises a number relatively prime or co-prime to 12.