Intra-band carrier aggregation based subband full-duplex operations
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration associated with an intra-band carrier aggregation based subband full-duplex (SBFD) operation, the configuration indicating time information and frequency information that are associated with each of a plurality of component carriers, the plurality of component carriers including at least one downlink component carrier associated with a downlink subband and at least one uplink component carrier associated with an uplink subband different from the downlink component carrier associated with the downlink subband. The UE may perform a communication in an SBFD slot or symbol that is based at least in part on the configuration. Numerous other aspects are described.
1 . An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive a configuration associated with an intra-band carrier aggregation based subband full-duplex (SBFD) operation, the configuration indicating time information and frequency information that are associated with each of a plurality of component carriers, the plurality of component carriers including at least one downlink component carrier associated with a downlink subband and at least one uplink component carrier associated with an uplink subband different from the downlink component carrier associated with the downlink subband, wherein the uplink component carrier is based at least in part on a single uplink bandwidth part (BWP) configured for an SBFD symbol and a legacy uplink-downlink symbol; and
perform a communication in an SBFD slot or symbol that is based at least in part on the configuration.
2 . The apparatus of claim 1 ,
wherein the configuration indicates a quantity of resource blocks between a pair of component carriers, of the plurality of component carriers, wherein the quantity of resource blocks is associated with a guard band between the pair of component carriers, and wherein the pair of component carriers includes the downlink component carrier associated with the downlink subband of the SBFD operation and the uplink component carrier associated with the uplink subband of the SBFD operation.
3 . The apparatus of claim 1 ,
wherein the downlink component carrier is a downlink-only component carrier, and wherein the uplink component carrier is an uplink-only component carrier.
4 . The apparatus of claim 1 , wherein:
the frequency information indicates a frequency allocation per component carrier or per subband; or
the frequency information indicates that the downlink subband is associated with the downlink component carrier.
5 . The apparatus of claim 1 ,
wherein the time information indicates a time location, and wherein the time location indicates:
one or more legacy downlink symbols configured as SBFD symbols in accordance with a periodic pattern,
one or more legacy downlink slots configured as SBFD slots in accordance with the periodic pattern,
one or more legacy flexible symbols configured as the SBFD symbols in accordance with the periodic pattern,
one or more legacy flexible slots configured as the SBFD slots in accordance with the periodic pattern,
one or more legacy uplink symbols configured as the SBFD symbols in accordance with the periodic pattern, or
one or more legacy uplink slots configured as the SBFD slots in accordance with the periodic pattern.
6 . The apparatus of claim 1 ,
wherein an uplink beam associated with the uplink component carrier is based at least in part on a transmission configuration indicator (TCI) state of a strongest reference signal received power (RSRP) synchronization signal block (SSB), of one or more SSBs, received on a primary cell or a reference cell associated with a network node, and wherein the uplink component carrier is associated with the uplink subband of the SBFD operation.
7 . The apparatus of claim 1 ,
wherein the one or more processors are further configured to:
receive, via the downlink component carrier, a signaling that indicates an uplink beam associated with the uplink component carrier, wherein the downlink component carrier is associated with the downlink subband of the SBFD operation and the uplink component carrier is associated with the uplink subband of the SBFD operation.
8 . The apparatus of claim 1 ,
wherein the one or more processors are further configured to:
receive, via the uplink component carrier, a signaling that indicates an uplink beam associated with the uplink component carrier, wherein a percentage of resources are reserved to monitor the signaling on the uplink component carrier, and wherein the uplink component carrier is associated with the uplink subband of the SBFD operation.
9 . The apparatus of claim 1 ,
wherein the one or more processors are further configured to:
receive, via the downlink component carrier or another component carrier, a signaling that indicates a scheduling for an uplink transmission on the uplink component carrier.
10 . The apparatus of claim 1 ,
wherein the one or more processors are further configured to:
receive, via the uplink component carrier or another component carrier, a signaling that indicates a scheduling for an uplink transmission on the uplink component carrier, wherein a percentage of resources are reserved to monitor the signaling on the uplink component carrier, and wherein the uplink component carrier is associated with the uplink subband of the SBFD operation.
11 . The apparatus of claim 1 ,
wherein the one or more processors are further configured to:
receive, via the uplink component carrier, a signaling that indicates at least one component carrier index of the plurality of component carriers that is associated with the uplink component carrier, wherein a percentage of resources are reserved to monitor the signaling on the uplink component carrier, and wherein the uplink component carrier is associated with the uplink subband of the SBFD operation.
12 . The apparatus of claim 1 ,
wherein the one or more processors are further configured to:
receive, via the downlink component carrier or another component carrier, a signaling that indicates at least one component carrier index of the plurality of component carriers that is associated with the uplink component carrier.
13 . The apparatus of claim 1 ,
wherein at least one component carrier index of the plurality of component carriers is associated with the uplink component carrier based at least in part on only an uplink bandwidth part (BWP) being configured on the uplink component carrier on SBFD symbols or slots.
14 . The apparatus of claim 1 ,
wherein the uplink component carrier is based at least in part on multiple uplink bandwidth parts (BWPs) configured for the SBFD symbol and a legacy uplink-downlink symbol, and wherein a dynamic change between a legacy uplink-downlink component carrier and the uplink component carrier is via a BWP switching with a BWP switching latency.
15 . The apparatus of claim 1 ,
wherein the SBFD operation is associated with a network node, and wherein the UE is a half-duplex SBFD aware UE.
16 . An apparatus for wireless communication at a network node, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit a configuration associated with an intra-band carrier aggregation based subband full-duplex (SBFD) operation, the configuration indicating time information and frequency information that are associated with each of a plurality of component carriers, the plurality of component carriers including at least one downlink component carrier associated with a downlink subband and at least one uplink component carrier associated with an uplink subband different from the downlink component carrier associated with the downlink subband, wherein the uplink component carrier is based at least in part on a single uplink bandwidth part (BWP) configured for an SBFD symbol and a legacy uplink-downlink symbol; and
perform a communication in an SBFD slot or symbol that is based at least in part on the configuration.
17 . The apparatus of claim 16 ,
wherein the configuration indicates a quantity of resource blocks between a pair of component carriers, of the plurality of component carriers, wherein the quantity of resource blocks is associated with a guard band between the pair of component carriers, and wherein the pair of component carriers includes the downlink component carrier associated with the downlink subband of the SBFD operation and the uplink component carrier associated with the uplink subband of the SBFD operation.
18 . The apparatus of claim 16 ,
wherein the downlink component carrier is a downlink-only component carrier, and wherein the uplink component carrier is an uplink-only component carrier.
19 . The apparatus of claim 16 , wherein:
the frequency information indicates a frequency allocation per component carrier or per subband; or
the frequency information indicates that the downlink subband is associated with the downlink component carrier.
20 . The apparatus of claim 16 ,
wherein the time information indicates a time location, and wherein the time location indicates:
one or more legacy downlink symbols configured as SBFD symbols in accordance with a periodic pattern,
one or more legacy downlink slots configured as SBFD slots in accordance with the periodic pattern,
one or more legacy flexible symbols configured as the SBFD symbols in accordance with the periodic pattern,
one or more legacy flexible slots configured as the SBFD slots in accordance with the periodic pattern,
one or more legacy uplink symbols configured as the SBFD symbols in accordance with the periodic pattern, or
one or more legacy uplink slots configured as the SBFD slots in accordance with the periodic pattern.
21 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving a configuration associated with an intra-band carrier aggregation based subband full-duplex (SBFD) operation, the configuration indicating time information and frequency information that are associated with each of a plurality of component carriers, the plurality of component carriers including at least one downlink component carrier associated with a downlink subband and at least one uplink component carrier associated with an uplink subband different from the downlink component carrier associated with the downlink subband, wherein the uplink component carrier is based at least in part on a single uplink bandwidth part (BWP) configured for an SBFD symbol and a legacy uplink-downlink symbol; and
performing a communication in an SBFD slot or symbol that is based at least in part on the configuration.
22 . The method of claim 21 ,
wherein the configuration indicates a quantity of resource blocks between a pair of component carriers, of the plurality of component carriers, wherein the quantity of resource blocks is associated with a guard band between the pair of component carriers, and wherein the pair of component carriers includes the downlink component carrier associated with the downlink subband of the SBFD operation and the uplink component carrier associated with the uplink subband of the SBFD operation.
23 . The method of claim 21 ,
wherein the downlink component carrier is a downlink-only component carrier, and wherein the uplink component carrier is an uplink-only component carrier.
24 . The method of claim 21 , wherein:
the frequency information indicates a frequency allocation per component carrier or per subband; or
the frequency information indicates that the downlink subband is associated with the downlink component carrier.
25 . The method of claim 21 ,
wherein the time information indicates a time location, and wherein the time location indicates:
one or more legacy downlink symbols configured as SBFD symbols in accordance with a periodic pattern,
one or more legacy downlink slots configured as SBFD slots in accordance with the periodic pattern,
one or more legacy flexible symbols configured as the SBFD symbols in accordance with the periodic pattern,
one or more legacy flexible slots configured as the SBFD slots in accordance with the periodic pattern,
one or more legacy uplink symbols configured as the SBFD symbols in accordance with the periodic pattern, or
one or more legacy uplink slots configured as the SBFD slots in accordance with the periodic pattern.
26 . The method of claim 21 ,
wherein an uplink beam associated with the uplink component carrier is based at least in part on a transmission configuration indicator (TCI) state of a strongest reference signal received power (RSRP) synchronization signal block (SSB), of one or more SSBs, received on a primary cell or a reference cell associated with a network node, and wherein the uplink component carrier is associated with the uplink subband of the SBFD operation.
27 . A method of wireless communication performed by a network node, comprising:
Transmitting a configuration associated with an intra-band carrier aggregation based subband full-duplex (SBFD) operation, the configuration indicating time information and frequency information that are associated with each of a plurality of component carriers, the plurality of component carriers including at least one downlink component carrier associated with a downlink subband and at least one uplink component carrier associated with an uplink subband different from the downlink component carrier associated with the downlink subband, wherein the uplink component carrier is based at least in part on a single uplink bandwidth part (BWP) configured for an SBFD symbol and a legacy uplink-downlink symbol; and
performing a communication in an SBFD slot or symbol that is based at least in part on the configuration.
28 . The method of claim 27 ,
wherein the configuration indicates a quantity of resource blocks between a pair of component carriers, of the plurality of component carriers, wherein the quantity of resource blocks is associated with a guard band between the pair of component carriers, and wherein the pair of component carriers includes the downlink component carrier associated with the downlink subband of the SBFD operation and the uplink component carrier associated with the uplink subband of the SBFD operation.
29 . The method of claim 27 , wherein:
the frequency information indicates a frequency allocation per component carrier or per subband; or
the frequency information indicates that the downlink subband is associated with the downlink component carrier.
30 . The method of claim 27 ,
wherein the time information indicates a time location, and wherein the time location indicates:
one or more legacy downlink symbols configured as SBFD symbols in accordance with a periodic pattern,
one or more legacy downlink slots configured as SBFD slots in accordance with the periodic pattern,
one or more legacy flexible symbols configured as the SBFD symbols in accordance with the periodic pattern,
one or more legacy flexible slots configured as the SBFD slots in accordance with the periodic pattern,
one or more legacy uplink symbols configured as the SBFD symbols in accordance with the periodic pattern, or
one or more legacy uplink slots configured as the SBFD slots in accordance with the periodic pattern.