Physical downlink control channel coexistence for different user equipment categories
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration that indicates a first control resource set (CORESET) configured for a first category of UEs and a second CORESET configured for a second category of UEs with which the UE is associated, wherein the first CORESET has a first frequency domain resource allocation, and wherein the second CORESET overlaps in time with the first CORESET and has a second frequency domain resource allocation that is a subset of the first frequency domain resource allocation. The UE may monitor for a physical downlink control channel (PDCCH) candidate based at least in part on a determination that the PDCCH candidate is fully contained within the second frequency domain resource allocation. Numerous other aspects are provided.
1 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving a configuration that indicates a first control resource set (CORESET) configured for a first category of UEs and a second CORESET configured for a second category of UEs with which the UE is associated, wherein the first CORESET has a first frequency domain resource allocation, and wherein the second CORESET overlaps in time with the first CORESET and has a second frequency domain resource allocation that is a subset of the first frequency domain resource allocation, wherein a first search space (SS) set occasion configured for the first CORESET overlaps completely in time with a second SS set occasion configured for the second CORESET, wherein one or more parameters of a SS set configuration of the first CORESET are the same as one or more parameters of a SS set configuration of the second CORESET, wherein the one or more parameters comprise: a SS set periodicity, a SS symbol bitmap, or a SS aggregation level; and
monitoring for a physical downlink control channel (PDCCH) candidate based at least in part on a determination that the PDCCH candidate is fully contained within the second frequency domain resource allocation.
2 . The method of claim 1 ,
wherein the first frequency domain resource allocation is indicated using a resource block bitmap.
3 . The method of claim 1 ,
wherein the second frequency domain resource allocation is indicated using at least one of a resource block bitmap, a starting resource block, an ending resource block, a number of resource blocks that span the second frequency domain resource allocation, a range of resource blocks, or a combination thereof.
4 . The method of claim 1 ,
wherein frequency mapping for a set of PDCCH candidates is based at least in part on the first frequency domain resource allocation, and wherein a subset of the set of PDCCH candidates are included in the second frequency domain resource allocation.
5 . The method of claim 1 ,
wherein the PDCCH candidate is determined to be fully contained within the second frequency domain resource allocation if all resource blocks of the PDCCH candidate are within the second frequency domain resource allocation.
6 . The method of claim 1 ,
wherein a control channel element (CCE) to resource element group (REG) mapping type is set to a non-interleaved mode for the first CORESET and the second CORESET.
7 . The method of claim 1 ,
wherein a control channel element (CCE) to resource element group (REG) mapping type is set to an interleaved mode for the first CORESET and the second CORESET.
8 . A method of wireless communication performed by a wireless communication device, comprising:
partitioning a first control resource set (CORESET), configured for a first category of user equipments (UEs), into a first sub-band and a second sub-band, wherein the first sub-band is not included in a frequency domain resource allocation of a second CORESET configured for a second category of UEs and the second sub-band is included in the frequency domain resource allocation of the second CORESET;
mapping a set of control channel elements (CCEs) of a physical downlink control channel (PDCCH) candidate to a set of resource element groups (REGs) of the first CORESET; and
relocating one or more REGs of the set of REGs to be frequency-aligned with corresponding REGs configured for the second CORESET based at least in part on a determination that the one or more REGs are included in the second sub-band.
9 . The method of claim 8 , further comprising
refraining from relocating one or more REGs, of the set of REGs, that are included in the first sub-band.
10 . The method of claim 8 ,
wherein the one or more REGs are relocated based at least in part on at least one of an aggregation level supported by the second category of UEs, a PDCCH candidate index associated with a REG being relocated, a PDCCH candidate index associated with a REG configured for the second CORESET, a frequency domain distance between the REG being relocated and the REG configured for the second CORESET, or a combination thereof.
11 . A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
receive a configuration that indicates a first control resource set (CORESET) configured for a first category of UEs and a second CORESET configured for a second category of UEs with which the UE is associated, wherein the first CORESET has a first frequency domain resource allocation, and wherein the second CORESET overlaps in time with the first CORESET and has a second frequency domain resource allocation that is a subset of the first frequency domain resource allocation, wherein a first search space (SS) set occasion configured for the first CORESET overlaps completely in time with a second SS set occasion configured for the second CORESET, wherein one or more parameters of a SS set configuration of the first CORESET are the same as one or more parameters of a SS set configuration of the second CORESET, wherein the one or more parameters comprise: a SS set periodicity, a SS symbol bitmap, or a SS aggregation level; and
monitor for a physical downlink control channel (PDCCH) candidate based at least in part on a determination that the PDCCH candidate is fully contained within the second frequency domain resource allocation.
12 . The UE of claim 11 ,
wherein the first frequency domain resource allocation is indicated using a resource block bitmap.
13 . The UE of claim 11 ,
wherein the second frequency domain resource allocation is indicated using at least one of a resource block bitmap, a starting resource block, an ending resource block, a number of resource blocks that span the second frequency domain resource allocation, a range of resource blocks, or a combination thereof.
14 . The UE of claim 11 ,
wherein frequency mapping for a set of PDCCH candidates is based at least in part on the first frequency domain resource allocation, and wherein a subset of the set of PDCCH candidates are included in the second frequency domain resource allocation.
15 . The UE of claim 11 ,
wherein the PDCCH candidate is determined to be fully contained within the second frequency domain resource allocation if all resource blocks of the PDCCH candidate are within the second frequency domain resource allocation.
16 . The UE of claim 11 ,
wherein a control channel element (CCE) to resource element group (REG) mapping type is set to a non-interleaved mode for the first CORESET and the second CORESET.
17 . The UE of claim 11 ,
wherein a control channel element (CCE) to resource element group (REG) mapping type is set to an interleaved mode for the first CORESET and the second CORESET.
18 . A wireless communication device for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
partition a first control resource set (CORESET), configured for a first category of user equipments (UEs), into a first sub-band and a second sub-band, wherein the first sub-band is not included in a frequency domain resource allocation of a second CORESET configured for a second category of UEs and the second sub-band is included in the frequency domain resource allocation of the second CORESET;
map a set of control channel elements (CCEs) of a physical downlink control channel (PDCCH) candidate to a set of resource element groups (REGs) of the first CORESET; and
relocate one or more REGs of the set of REGs to be frequency-aligned with corresponding REGs configured for the second CORESET based at least in part on a determination that the one or more REGs are included in the second sub-band.
19 . The wireless communication device of claim 18 ,
wherein the one or more processors are further configured to refrain from relocating one or more REGs, of the set of REGs, that are included in the first sub-band.
20 . The wireless communication device of claim 18 ,
wherein the one or more REGs are relocated based at least in part on at least one of an aggregation level supported by the second category of UEs, a PDCCH candidate index associated with a REG being relocated, a PDCCH candidate index associated with a REG configured for the second CORESET, a frequency domain distance between the REG being relocated and the REG configured for the second CORESET, or a combination thereof.