Techniques for scaling bandwidth of an unlicensed radio frequency spectrum band
The present disclosure, for example, relates to one or more techniques for scaling the bandwidth of a carrier. Available sub-channels of an unlicensed radio frequency spectrum band may be determined, and the available sub-channels may be included in the carrier. The available sub-channels may be adjacent or non-adjacent sub-channels. The bandwidth of the carrier may be determined according to which sub-channels are included in the carrier. In this way, the bandwidth of the carrier may be scaled according to the available sub-channels in the unlicensed radio frequency spectrum band.
1. A method for wireless communication, comprising:
identifying a plurality of sub-channels in an unlicensed radio frequency spectrum band;
performing a first clear channel assessment (CCA) on the plurality of sub-channels based at least in part on a first CCA threshold;
determining a first subset of the plurality of sub-channels corresponding to sub-channels of the plurality of sub-channels that are clear according to the first CCA;
setting a second CCA threshold based at least in part on the first subset of the plurality of sub-channels;
performing a second CCA on the first subset of the plurality of sub-channels based at least in part on the second CCA threshold;
determining a second subset of the plurality of sub-channels corresponding to sub-channels that are clear according to the second CCA, the second CCA comprising CCA countdown slots for the first subset of the plurality of sub-channels; and
communicating over a carrier comprising at least the second subset of the plurality of sub-channels using the unlicensed radio frequency spectrum band.
2. The method of claim 1 ,
wherein the first CCA threshold is an optimistic CCA threshold that is set
based at least in part on the all of the plurality of sub-channels being scheduled for transmission.
3. The method of claim 2 ,
wherein the second CCA threshold is a redistributed CCA threshold that is set based at least in part on all the first subset of the plurality of sub-channels being scheduled for transmission.
4. The method of claim 3 , wherein communicating over the second subset of the plurality of sub-channels is delayed until the CCA countdown slots are exceeded for all sub-channels of the first subset.
5. An apparatus for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory, the instructions being executable by the processor to:
identify a plurality of sub-channels in an unlicensed radio frequency spectrum band;
perform a first clear channel assessment (CCA) on the plurality of sub-channels based at least in part on a first CCA threshold;
determine a first subset of the plurality of sub-channels corresponding to sub-channels of the plurality of sub-channels that are clear according to the first CCA;
set a second CCA threshold based at least in part on the first subset of the plurality of sub-channels;
perform a second CCA on the first subset of the plurality of sub-channels based at least in part on the second CCA threshold;
determine a second subset of the plurality of sub-channels corresponding to sub-channels of the first subset of the plurality of sub-channels that are clear according to the second CCA, the second CCA comprising CCA countdown slots for the first subset of the plurality of sub-channels; and
communicate over a carrier comprising at least the second subset of the plurality of sub-channels using the unlicensed radio frequency spectrum band.
6. The apparatus of claim 5 , wherein the first CCA threshold is an optimistic CCA threshold that is set based at least in part on all of the plurality of sub-channels being scheduled for transmission.
7. The apparatus of claim 6 , wherein the second CCA threshold is a redistributed CCA threshold that is set based at least in part on all the first subset of the plurality of sub-channels being scheduled for transmission.
8. The apparatus of claim 7 , wherein a communication over the second subset of the plurality of sub-channels is delayed until the CCA countdown slots are exceeded for all sub-channels of the first subset.
9. An apparatus for wireless communication, comprising:
means for identifying a plurality of sub-channels in an unlicensed radio frequency spectrum band;
means for performing a first clear channel assessment (CCA) on the plurality of sub-channels based at least in part on a first CCA threshold;
means for determining a first subset of the plurality of sub-channels corresponding to sub-channels of the plurality of sub-channels that are clear according to the first CCA;
means for setting a second CCA threshold based at least in part on the first subset of the plurality of sub-channels;
means for performing a second CCA on the first subset of the plurality of sub-channels based at least in part on the second CCA threshold;
means for determining a second subset of the plurality of sub-channels corresponding to sub-channels of the first subset of the plurality of sub-channels that are clear according to the second CCA, the second CCA comprising CCA countdown slots for the first subset of the plurality of sub-channels; and
means for communicating over a carrier comprising at least the second subset of the plurality of sub-channels using the unlicensed radio frequency spectrum band.
10. The apparatus of claim 9 , wherein the first CCA threshold is an optimistic CCA threshold that is set based at least in part on all of the plurality of sub-channels being scheduled for transmission.
11. The apparatus of claim 10 , wherein the second CCA threshold is a redistributed CCA threshold that is set based at least in part on all the first subset of the plurality of sub-channels being scheduled for transmission.
12. The apparatus of claim 11 , wherein a communication over the second subset of the plurality of sub-channels is delayed until the CCA countdown slots are exceeded for all sub-channels of the first subset.
13. A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code executable by a processor to:
identify a plurality of sub-channels in an unlicensed radio frequency spectrum band;
perform a first clear channel assessment (CCA) on the plurality of sub-channels based at least in part on a first CCA threshold;
determine a first subset of the plurality of sub-channels corresponding to sub-channels of the plurality of sub-channels that are clear according to the first CCA;
set a second CCA threshold based at least in part on the first subset of the plurality of sub-channels;
perform a second CCA on the first subset of the plurality of sub-channels based at least in part on the second CCA threshold;
determine a second subset of the plurality of sub-channels corresponding to sub-channels of the first subset of the plurality of sub-channels that are clear according to the second CCA, the second CCA comprising CCA countdown slots for the first subset of the plurality of sub-channels; and
communicate over a carrier comprising at least the second subset of the plurality of sub-channels using the unlicensed radio frequency spectrum band.
14. The non-transitory computer-readable medium of claim 13 , wherein the first CCA threshold is an optimistic CCA threshold that is set based at least in part on all of the plurality of sub-channels to be used for transmission.
15. The non-transitory computer-readable medium of claim 14 , wherein the second CCA threshold is a redistributed CCA threshold that is set based at least in part on all the first subset of the plurality of sub-channels being scheduled for transmission.
16. The non-transitory computer-readable medium of claim 15 , wherein a communication over the second subset of the plurality of sub-channels is delayed until the CCA countdown slots are exceeded for all sub-channels of the first subset.