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1. WO2021002974 - TECHNIQUES FOR ADAPTIVE SUB-BAND USAGE FOR UPLINK CONTROL CHANNEL

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

WHAT IS CLAIMED IS:

1. A method of wireless communication performed by a user equipment (UE), comprising: identifying a control channel resource configuration associated with an unlicensed spectrum, wherein the control channel resource configuration is associated with an indication of whether a resource to be used for an uplink control channel in the unlicensed spectrum is a fixed resource, a floating resource, or an adaptive resource;

identifying the resource based at least in part on the control channel resource configuration; and

transmitting uplink control information on the identified resource.

2. The method of claim 1, wherein identifying the resource is based at least in part on whether a sub-band in which the resource is included is a floating sub-band or a fixed sub-band.

3. The method of claim 2, wherein, when the sub-band is a floating sub-band, identifying the resource further comprises:

identifying the resource based at least in part on the sub-band being identified by a configured list of sub-bands.

4. The method of claim 1, wherein, when the resource is an adaptive resource, identifying the resource further comprises:

identifying the resource based at least in part on a mapping of resources and corresponding sub-bands and based at least in part on an indication, in the control channel resource configuration, indicating which resource is to be used.

5. The method of claim 1, wherein identifying the resource further comprises:

identifying an interlace configuration for the uplink control channel from a plurality of interlace configurations associated with a set of sub-bands.

6. The method of claim 5, wherein the interlace configuration uses a smallest number of resource blocks of respective quantities of resource blocks associated with the plurality of interlace configurations.

7. The method of claim 5, wherein the uplink control channel uses all resource blocks of the interlace configuration.

8 The method of claim 1, wherein the uplink control channel spans a single sub-band.

9. The method of claim 1, wherein the uplink control channel spans multiple sub-bands.

10. The method of claim 9, wherein a number of resource blocks used for the resource is proportionate to a number of sub-bands included in the multiple sub-bands.

11. The method of claim 9, wherein a number of resource blocks used for the resource is independent of a number of sub-bands included in the multiple sub-bands.

12. The method of claim 11, further comprising:

receiving information indicating at least one of a periodicity or an offset of the resource blocks used for the resource.

13. The method of claim 9, further comprising:

receiving information indicating whether a number of resource blocks used for the resource is proportionate to or independent of a number of sub-bands included in the multiple sub-bands, wherein the information indicating whether the number of resource blocks used for the resource is proportionate to or independent of the number of sub-bands included in the multiple sub-bands further indicates an interlace periodicity of the resource.

14. The method of claim 9, further comprising:

dropping one or more resource blocks of the resource when an interlace configuration of the multiple sub-bands is associated with fewer resource blocks than are included in the resource.

15. The method of claim 1, wherein the fixed resource is associated with a fixed frequency location, wherein the floating resource is associated with a fixed bandwidth and a variable frequency location, and wherein the adaptive resource is associated with a variable bandwidth and a variable frequency location.

16. The method of claim 1, wherein, when the uplink control channel is a dynamically scheduled uplink control channel, the control channel resource configuration includes configuration information for multiple, different resources, and

wherein identifying the resource is based at least in part on information indicating that the resource is to be used for the uplink control channel, wherein the multiple, different resources correspond to different sub-bands or different bandwidths for the uplink control channel.

17. The method of claim 1, wherein identifying the resource further comprises:

identifying at least one of a time resource or a frequency resource for the uplink control channel.

18. The method of claim 1, wherein the control channel resource configuration is common to multiple resources.

19. The method of claim 1, wherein the control channel resource configuration is specific to the resource.

20. The method of claim 1, wherein the control channel resource configuration is determined based at least in part on at least one of:

downlink control information, or

an outcome of a listen-before-talk (LBT) procedure.

21. The method of claim 1, wherein identifying the resource further comprises:

identifying a sub-band, of a plurality of sub-bands, on which to transmit the uplink control channel.

22. The method of claim 1, wherein identifying the resource further comprises:

identifying multiple sub-bands, of a plurality of sub-bands, on which to transmit the uplink control channel.

23. The method of claim 1, wherein, when the uplink control channel is to be transmitted outside of a channel occupancy time (COT) of a base station associated with the UE and the control channel resource configuration indicates that the resource is an adaptive resource or a floating resource, the resource is identified as the fixed resource.

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

a memory; and

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

identify a control channel resource configuration associated with an unlicensed spectrum, wherein the control channel resource configuration is associated with an indication of whether a resource to be used for an uplink control channel in the unlicensed spectrum is a fixed resource, a floating resource, or an adaptive resource; identify the resource based at least in part on the control channel resource configuration; and

transmit uplink control information on the identified resource.

25. The UE of claim 24, wherein identifying the resource is based at least in part on whether a sub-band in which the resource is included is a floating sub-band or a fixed sub-band.

26. The UE of claim 25, wherein, when the sub-band is a floating sub-band, the one or more processors, when identifying the resource, are further configured to:

identify the resource based at least in part on the sub-band being identified by a configured list of sub-bands.

27. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:

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

identify a control channel resource configuration associated with an unlicensed spectrum, wherein the control channel resource configuration is associated with an indication of whether a resource to be used for an uplink control channel in the unlicensed spectrum is a fixed resource, a floating resource, or an adaptive resource; identify the resource based at least in part on the control channel resource configuration; and

transmit uplink control information on the identified resource.

28. The non-transitory computer-readable medium of claim 27, wherein identifying the resource is based at least in part on whether a sub-band in which the resource is included is a floating sub-band or a fixed sub-band.

29. An apparatus for wireless communication, comprising:

means for identifying a control channel resource configuration associated with an unlicensed spectrum, wherein the control channel resource configuration is associated with an indication of whether a resource to be used for an uplink control channel in the unlicensed spectrum is a fixed resource, a floating resource, or an adaptive resource;

means for identifying the resource based at least in part on the control channel resource configuration; and

means for transmitting uplink control information on the identified resource.

30. The apparatus of claim 29, wherein identifying the resource is based at least in part on whether a sub-band in which the resource is included is a floating sub-band or a fixed sub-band.