Techniques for shared radio frequency spectrum channel configuration
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station (BS), information identifying a core resource set (CORESET) for one or more shared radio frequency spectrum channels. The CORESET may be configured into a plurality of resource blocks based at least in part on a resource block granularity associated with the one or more shared radio frequency spectrum channels. The UE may communicate with the BS using the CORESET. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a base station (BS), information identifying a control resource set (CORESET) for one or more shared radio frequency spectrum channels,
wherein the CORESET includes a plurality of resource blocks based at least in part on a resource block granularity associated with the one or more shared radio frequency spectrum channels, and
wherein a location of the CORESET, in a shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, is indicated relative to a reference frequency associated with the one or more shared radio frequency spectrum channels; and
communicating with the BS using the CORESET.
2. The method of claim 1 , wherein communicating with the BS based at least in part on the CORESET comprises:
receiving, from the BS, a physical downlink control channel (PDCCH) communication based at least in part on monitoring a control region configured by the CORESET.
3. The method of claim 1 , wherein a control channel resource allocation granularity associated with the one or more shared radio frequency spectrum channels is different from a control channel resource allocation granularity associated with a licensed frequency spectrum channel.
4. The method of claim 1 ,
wherein the reference frequency associated with the shared radio frequency spectrum channel is different from a reference frequency associated with a licensed frequency spectrum channel.
5. The method of claim 1 , wherein the CORESET includes the plurality of resource blocks based at least in part on at least one of:
a subcarrier spacing associated with the one or more shared radio frequency spectrum channels, or
a number of subcarriers included in each resource block of the plurality of resource blocks.
6. The method of claim 1 , wherein the information identifying the CORESET comprises:
a plurality of bits included in a bitmap,
wherein each of the plurality of bits indicates a respective subset of the plurality of resource blocks.
7. The method of claim 6 , wherein a first bit, of the plurality of bits, is associated with a first resource block group that includes a starting resource block of a first shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels;
wherein a second bit, of the plurality of bits, is associated with a second resource block group that includes an ending resource block of the first shared radio frequency spectrum channel; and
wherein the first bit and the second bit are based at least in part on a third bit associated with a third resource block group that includes a resource block index associated with a bandwidth part (BWP) in which the CORESET is included.
8. The method of claim 7 , wherein the first bit and the second bit are based at least in part on at least one of:
a channel frequency associated with the first shared radio frequency spectrum channel; and
a channel bandwidth associated with the first shared radio frequency spectrum channel.
9. The method of claim 6 , wherein the plurality of bits included in the bitmap is based at least in part on at least one of:
the resource block granularity that is used to configure the CORESET,
a number of resource blocks included in the plurality of resource blocks,
a number of resource block groups included in the plurality of resource blocks,
a respective number of resource blocks, on each side of a channel frequency associated with a first shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, included in the CORESET, or
a respective number of resource block groups, on each side of the channel frequency associated with the first shared radio frequency spectrum channel, included in the CORESET.
10. The method of claim 1 , wherein a first shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels shares, with a second shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, at least one of:
a resource block index,
a number of resource blocks, or
a number of resource block groups.
11. The method of claim 1 , wherein the information identifying the CORESET is included in at least one of:
a radio resource control (RRC) communication,
a medium access control control element (MAC-CE) communication, or
a downlink control information (DCI) communication.
12. A method of wireless communication performed by a base station (BS), comprising:
configuring, based at least in part on a resource block granularity associated with one or more shared radio frequency spectrum channels, a control resource set (CORESET) for the one or more shared radio frequency spectrum channels into a plurality of resource blocks,
wherein a location of the CORESET, in a shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, is indicated relative to a reference frequency associated with the one or more shared radio frequency spectrum channels; and
transmitting, to a user equipment (UE), information identifying the plurality of resource blocks.
13. The method of claim 12 , wherein a control channel resource allocation granularity associated with the one or more shared radio frequency spectrum channels is different from a control channel resource allocation granularity associated with a licensed frequency spectrum channel.
14. The method of claim 12 , wherein configuring the CORESET into the plurality of resource blocks comprises:
configuring the CORESET into the plurality of resource blocks based at least in part on:
a subcarrier spacing associated with the one or more shared radio frequency spectrum channels, or
a number of subcarriers included in each resource block of the plurality of resource blocks.
15. The method of claim 12 , wherein the information identifying the plurality of resource blocks comprises:
a plurality of bits included in a bitmap.
16. The method of claim 15 , further comprising:
determining a first resource block, of the plurality of resource blocks, at a first edge of a first shared radio frequency channel of the one or more shared radio frequency spectrum channels;
determining a second resource block, of the plurality of resource blocks, at a second edge of the first shared radio frequency channel;
determining, based at least in part on a resource block index associated with the one or more shared radio frequency spectrum channels, a first offset for the first resource block;
determining, based at least in part on the resource block index, a second offset for the second resource block; and
selecting a subset of the plurality of bits based at least in part on the first offset and the second offset.
17. The method of claim 16 , wherein determining the first resource block at the first edge of the first shared radio frequency spectrum channel comprises:
determining a channel frequency resource block associated with a channel frequency of the first shared radio frequency spectrum channel;
determining a subset of resource blocks, included in the plurality of resource blocks, on a side of the first channel frequency resource block; and
determining the first resource block based at least in part on:
the channel frequency resource block, and
the subset of resource blocks.
18. The method of claim 16 , wherein determining the second resource block at the second edge of the first shared radio frequency spectrum channel comprises:
determining a channel frequency resource block associated with a channel frequency of the first shared radio frequency spectrum channel;
determining a subset of resource block groups, included in the plurality of resource blocks, on a side of the channel frequency resource block; and
determining the second resource block based at least in part on:
the channel frequency resource block, and
the subset of resource block groups.
19. The method of claim 18 , further comprising:
determining a number of resource blocks, included in respective resource block groups of the subset of resource block groups, based at least in part on:
a subset of resource blocks, included in the plurality of resource blocks, on the side of the first channel frequency resource block; and
the resource block granularity associated with the one or more shared radio frequency spectrum channels.
20. The method of claim 12 , wherein a first shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels shares, with a second shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, at least one of:
a resource block index,
a number of resource blocks, or
a number of resource block groups.
21. The method of claim 12 , wherein the information identifying the plurality of resource blocks is included in at least one of:
a radio resource control (RRC) communication,
a medium access control control element (MAC-CE) communication, or
a downlink control information (DCI) communication.
22. The method of claim 12 , further comprising:
communicating with the UE using the CORESET.
23. The method of claim 22 , wherein communicating with the UE using the CORESET comprises:
transmitting, to the UE, a physical downlink control channel (PDCCH) communication in a control region configured by the CORESET.
24. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, to:
receive, from a base station (BS), information identifying a control resource set (CORESET) for one or more shared radio frequency spectrum channels,
wherein the CORESET includes a plurality of resource blocks based at least in part on a resource block granularity associated with the one or more shared radio frequency spectrum channels, and
wherein a location of the CORESET, in a shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, is indicated relative to a reference frequency associated with the one or more shared radio frequency spectrum channels; and
communicate with the BS using the CORESET.
25. The UE of claim 24 ,
wherein the reference frequency associated with the shared radio frequency spectrum channel is different from a reference frequency associated with a licensed frequency spectrum channel.
26. The UE of claim 24 , wherein the information identifying the CORESET comprises:
a plurality of bits included in a bitmap,
wherein each of the plurality of bits indicates a respective subset of the plurality of resource blocks.
27. The UE of claim 26 , wherein the plurality of bits included in the bitmap is based at least in part on a number of resource block groups included in the plurality of resource blocks.
28. The UE of claim 24 , wherein a first shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels shares, with a second shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, at least one of:
a resource block index,
a number of resource blocks, or
a number of resource block groups.
29. A base station (BS) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, to:
configure, based at least in part on a resource block granularity associated with one or more shared radio frequency spectrum channels, a control resource set (CORESET) for the one or more shared radio frequency spectrum channels into a plurality of resource blocks,
wherein a location of the CORESET, in a shared radio frequency spectrum channel of the one or more shared radio frequency spectrum channels, is indicated relative to a reference frequency associated with the shared radio frequency spectrum channels; and
transmit, to a user equipment (UE), information identifying the plurality of resource blocks.
30. The BS of claim 29 , wherein a control channel resource allocation granularity associated with the one or more shared radio frequency spectrum channels is different from a control channel resource allocation granularity associated with a licensed frequency spectrum channel.
31. The BS of claim 29 , wherein the information identifying the plurality of resource blocks comprises:
a plurality of bits included in a bitmap,
wherein each of the plurality of bits indicates a respective subset of the plurality of resource blocks.