Resource allocation and user multiplexing capacity enhancements for interlace based physical uplink control channel formats in new radio (nr)-unlicensed

Patent metadata

Field	Value
Publication number	US-2022166586-A1
Application number	US-202017440944-A
Country	US
Kind code	A1
Filing date	Mar 30, 2020
Priority date	Mar 29, 2019
Publication date	May 26, 2022
Grant date	—

Abstract

Systems and methods are described for a resource allocation and user multiplexing capacity enhancements for interlace based physical uplink control channel (PUCCH) formats in new radio (NR) using unlicensed spectrum (NR-U). The systems and methods can include at least generating, by the UE, an uplink signal according to a physical uplink control channel (PUCCH) format and having “n” number of physical resource blocks (PRBs) that are mapped in an interlaced manner across a frequency domain on a orthogonal frequency division multiplexing (OFDM) symbol, wherein “n” is an integer multiple of a number of PRBs per interlace, and transmitting, by the UE, the uplink signal over a PUCCH that utilizes unlicensed spectrum in a new radio wireless network.

First claim

1 . A method of operating a user equipment (UE) comprising:
generating, by the UE, an uplink signal according to a physical uplink control channel (PUCCH) format 2 and having “n” number of physical resource blocks (PRBs) that are mapped in an interlaced manner across a frequency domain on a orthogonal frequency division multiplexing (OFDM) symbol, wherein “n” is an integer multiple of a number of PRBs per interlace; and transmitting, by the UE, the uplink signal over a PUCCH that utilizes unlicensed spectrum in a wireless network.

2 . The method of claim 1 , further comprising:
determining, by the UE, a value of “n” based on an uplink control information (UCI) payload size; and choosing, by the UE, a code rate less than a configured maximum code rate in order to determine the value of “n” that is divisible by number of PRBs per interlace.

3 . The method of claim 1 , further comprising receiving, by the UE, one or more frequency domain resources, wherein the frequency domain resources include interlace indices with an index number that is pre-defined in a specification in terms of a starting PRB, an inter-PRB separation, and a number-of-PRBs per interlace.

4 . The method of claim 3 , wherein the generating further comprises determining, by the UE, a bitmap used to indicate which interlace to use, and wherein an index of a first interlace to be used is indicated by the bitmap or by k bits, wherein k=┌log 2 (x int max )┐ and x int max is a maximum number of interlaces.

5 . The method of claim 4 , further comprising configuring, by the UE, a starting interlace and a number of interlaces as a PUCCH resource allocation for PUCCH format 2 in a frequency domain.

6 . The method of claim 1 , wherein the generating further comprises determining, by the UE, a value of “n” based on n=x int *y PRB int +Δ PRB , wherein x int is a number of interlaces assigned to PUSSCH format 2 transmission and y PRB int is the number of PRBs per interlace and Δ PRB is an excess number of PRBs, and wherein Δ PRB <y PRB int .

7 . The method of claim 6 , wherein Δ PRB is restricted to be a factor of y PRB int and Δ PRB >1.

8 . A non-transitory computer readable medium having instructions stored thereon that, when executed by a user equipment (UE), cause the UE to perform operations comprising:
generating an uplink signal according to a physical uplink control channel (PUCCH) format 2 and having “n” number of physical resource blocks (PRBs) that are mapped in an interlaced manner across a frequency domain of a orthogonal frequency division multiplexing (OFDM) symbol, wherein “n” is an integer multiple of a number of PRBs per interlace; and transmitting the uplink signal over a PUCCH that utilizes unlicensed spectrum in a wireless network.

9 . The non-transitory computer readable medium of claim 8 , wherein the operations further comprise:
determining a value of “n” based on an uplink control information (UCI) payload size; and choosing a code rate less than a configured maximum code rate in order to determine the value of “n” that is divisible by number of PRBs per interlace.

10 . The non-transitory computer readable medium of claim 8 , wherein the operations further comprise receiving one or more frequency domain resources, wherein the frequency domain resources include interlace indices with an index number that is pre-defined in a specification in terms of a starting PRB, an inter-PRB separation, and a number-of-PRBs per interlace.

11 . The non-transitory computer readable medium of claim 10 , wherein the generating further comprises determining a bitmap used to indicate which interlace to use, and wherein an index of a first interlace to be used is indicated by the bitmap or by k bits, wherein k=┌log 2 (x int max )┐ and x int max is a maximum number of interlaces.

12 . The non-transitory computer readable medium of claim 11 , wherein the generating further comprises configuring a starting interlace and a number of interlaces as a PUCCH resource allocation for PUCCH format 2 in a frequency domain.

13 . The non-transitory computer readable medium of claim 8 , wherein the generating further comprises determining a value of “n” based on n=x int *y PRB int +Δ PRB , wherein x int is a number of interlaces assigned to PUSSCH format 2 transmission and y PRB int is the number of PRBs per interlace and Δ PRB is an excess number of PRBs, and wherein Δ PRB <y PRB int .

14 . The non-transitory computer readable medium of claim 13 , wherein Δ PRB is restricted to be a factor of y PRB int and Δ PRB >1.

15 . A user equipment (UE) comprising:
processor circuitry configured to generate an uplink signal according to a physical uplink control channel (PUCCH) format 2 and having “n” number of physical resource blocks (PRBs) that are mapped in an interlaced manner across a frequency domain on a orthogonal frequency division multiplexing (OFDM) symbol, wherein “n” is an integer multiple of a number of PRBs per interlace; and radio front end circuitry, coupled to the processor circuitry, configured to transmit the uplink signal on a PUCCH that utilizes unlicensed spectrum of a wireless network.

16 . The UE of claim 15 , wherein the processor circuitry is further configured to:
determine a value of “n” based on an uplink control information (UCI) payload size; and choose a code rate less than a configured maximum code rate in order to determine the value of “n” that is divisible by number of PRBs per interlace.

17 . The UE of claim 15 , wherein the processor circuitry is further configured to receive one or more frequency domain resources, wherein the frequency domain resources include interlace indices with an index number that is pre-defined in a specification in terms of a starting PRB, an inter-PRB separation, and a number-of-PRBs per interlace.

18 . The UE of claim 17 , wherein the processor circuitry is further configured to determine a bitmap used to indicate which interlace to use, and wherein an index of a first interlace to be used is indicated by the bitmap or by k bits, wherein k=┌log 2 (x int max )┐ and x int max is a maximum number of interlaces.

19 . The UE of claim 15 , wherein the processor circuitry is further configured to determine a value of “n” based on n=x int *y PRB int +Δ PRB , wherein x int is a number of interlaces assigned to PUSSCH format 2 transmission and y PRB int is the number of PRBs per interlace and Δ PRB is an excess number of PRBs, and wherein Δ PRB <y PRB int .

20 . The UE of claim 19 , wherein Δ PRB is restricted to be a factor of y PRB int and Δ PRB >1.

Assignees

• Apple Inc

Inventors

• Kundu Lopamudra
• Xiong Gang
• Kwak Yongjun

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L27/0006

  Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14) · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0041

  Frequency-non-contiguous · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title