Sub-band full duplex with overlapped sub-bands
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, information identifying a set of sub-bands for sub-band full duplex (SBFD) mode operation, wherein the information identifying the set of sub-bands identifies a first sub-band, with a first direction, that at least partially overlaps with a second sub-band with a second direction. The UE may communicate with the network node on at least one sub-band, of the set of sub-bands, in accordance with the information identifying the set of sub-bands. Numerous other aspects are described.
1 . A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive, from a network node, information identifying a set of sub-bands for sub-band full duplex (SBFD) mode operation, wherein the information identifying the set of sub-bands identifies a first sub-band, with a first direction, that at least partially overlaps with a second sub-band with a second direction, and wherein the information identifying the set of sub-bands includes information identifying a set of resource blocks associated with an overlap between the first sub-band and the second sub-band, and wherein the information identifying the set of sub-bands is received via a medium access control (MAC) control element; and
communicate with the network node on at least one sub-band, of the set of sub-bands, in accordance with the information identifying the set of sub-bands.
2 . The UE of claim 1 , wherein the SBFD mode operation is at least one of a network node SBFD mode, a UE SBFD mode, or a combination thereof.
3 . The UE of claim 1 , wherein the set of sub-bands is associated with a time domain resource allocation and a frequency domain resource allocation.
4 . The UE of claim 1 , wherein the overlap is limited to less than or equal to a configured amount of overlap, the configured amount being a quantity of resource blocks or a portion of a component carrier bandwidth.
5 . The UE of claim 1 , wherein the information identifying the set of sub-bands includes information identifying a guard band associated with an overlap between the first sub-band and the second sub-band.
6 . The UE of claim 5 , wherein a negative guard band size of the guard band corresponds to the overlap between the first sub-band and the second sub-band.
7 . The UE of claim 1 , wherein the information identifying the set of sub-bands includes an explicit indicator of a full overlap between the first sub-band and the second sub-band.
8 . The UE of claim 1 , wherein the overlap between the first sub-band and the second sub-band is an error case.
9 . The UE of claim 1 , wherein the network node is configured for dynamic switching of sub-band direction and wherein an overlap between two communications in a same direction is scheduled, and
wherein the one or more processors, to communicate with the network node on the at least one sub-band, are configured to:
multiplex a communication, of the two communications and which is scheduled for the first sub-band, onto the second sub-band based at least in part on the network node being configured for dynamic switching of sub-band direction.
10 . The UE of claim 9 , wherein multiplexing the communication, of the two communications, is based at least in part on a type of channel associated with the communication.
11 . The UE of claim 1 , wherein the network node is configured for dynamic switching of sub-band direction and wherein an overlap between two communications in a same direction is scheduled, and
wherein the one or more processors, to communicate with the network node on the at least one sub-band, are configured to:
communicate, based at least in part on the network node being configured for dynamic switching of sub-band direction first data with a first priority using an overlap between the first sub-band and the second sub-band, second data with a second priority, which is scheduled for the overlap, being dropped.
12 . The UE of claim 11 , wherein the first priority and the second priority are associated with at least one of:
a directionality,
a data content,
a channel type,
a reference signal type,
a configured priority index, or
a combination thereof.
13 . The UE of claim 1 , wherein one or more types of channels or reference signals are not configurable for an overlap between the first sub-band and the second sub-band.
14 . The UE of claim 13 , wherein the one or more types of channels or reference signals are not configurable for the overlap for frequency resources within an overlapped sub-band region.
15 . The UE of claim 13 , wherein the one or more types of channels or reference signals are not configurable within a symbol having an overlapped sub-band region.
16 . The UE of claim 13 , wherein the one or more types of channels or reference signals include at least one of:
a synchronization signal block,
a particular type of control resource set,
a random access channel occasion,
a physical downlink control channel,
a physical uplink control channel,
a channel state information reference signal,
a sounding reference signal, or
a combination thereof.
17 . The UE of claim 13 , wherein the one or more processors, to communicate with the network node on the at least one sub-band, are configured to:
rate matching a channel or reference signal, of the one or more types of channels or reference signals, around frequency resources of the overlap between the first sub-band and the second sub-band.
18 . The UE of claim 1 , wherein an overlap between the first sub-band and the second sub-band is associated with a first SBFD pattern, and
wherein configuring the UE with or dynamically indicating a second SBFD pattern without an overlap between a pair of sub-bands is an error case.
19 . The UE of claim 1 , wherein an overlap between the first sub-band and the second sub-band is associated with a first SBFD pattern, and
wherein the one or more processors, to receive the information identifying the set of sub-bands, are configured to:
receive information identifying or dynamically indicating a second SBFD pattern without an overlap between a pair of sub-bands.
20 . The UE of claim 19 , wherein the first SBFD pattern is associated with a first parameter set and the second SBFD pattern is associated with a second parameter set.
21 . The UE of claim 20 , wherein the first parameter set or the second parameter set includes a parameter relating to at least one of:
a time resource allocation,
a frequency resource allocation,
an occasion on a channel or reference signal for which a sub-band is configured,
a repetition configuration,
a dynamic scheduling configuration,
a power control parameter configuration,
a timing adjustment configuration,
a beam selection configuration,
a spatial multiplexing configuration,
a capability configuration, or
a combination thereof.
22 . The UE of claim 21 , wherein the first parameter set and the second parameter set includes a resource allocation across a plurality of occasions of a channel or reference signal in non-sub-band-overlapping SBFD symbols or sub-band-overlapping SBFD symbols, wherein the plurality of occasions are associated with a same or a dynamically-configured or activated channel or reference signal.
23 . The UE of claim 21 , wherein the parameter may be associated with a plurality of periodic occasions or dynamically scheduled instances of a channel or reference signal.
24 . A network node for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
transmit, to a user equipment (UE), information identifying a set of sub-bands for sub-band full duplex (SBFD) mode operation, wherein the information identifying the set of sub-bands identifies a first sub-band, with a first direction, that at least partially overlaps with a second sub-band with a second direction, and wherein the information identifying the set of sub-bands includes information identifying a set of resource blocks associated with an overlap between the first sub-band and the second sub-band, and wherein the information identifying the set of sub-bands is transmitted via a medium access control (MAC) control element; and
communicate with the UE on at least one sub-band, of the set of sub-bands, in accordance with the information identifying the set of sub-bands.
25 . The network node of claim 24 , wherein a resource element, which is in a wideband downlink allocation and that is outside of an overlap between the first sub-band or the second sub-band and outside a downlink sub-band, is not available for communicating with the UE.
26 . The network node of claim 24 , wherein a resource element, which is in a wideband uplink allocation and that is outside of an overlap between the first sub-band or the second sub-band and outside an uplink sub-band, is not available for communicating with the UE.
27 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a network node, information identifying a set of sub-bands for sub-band full duplex (SBFD) mode operation, wherein the information identifying the set of sub-bands identifies a first sub-band, with a first direction, that at least partially overlaps with a second sub-band with a second direction, and wherein the information identifying the set of sub-bands includes information identifying a set of resource blocks associated with an overlap between the first sub-band and the second sub-band, and wherein the information identifying the set of sub-bands is received via a medium access control (MAC) control element; and
communicating with the network node on at least one sub-band, of the set of sub-bands, in accordance with the information identifying the set of sub-bands.
28 . A method of wireless communication performed by a network node, comprising:
transmitting, to a user equipment (UE), information identifying a set of sub-bands for sub-band full duplex (SBFD) mode operation, wherein the information identifying the set of sub-bands identifies a first sub-band, with a first direction, that at least partially overlaps with a second sub-band with a second direction, and wherein the information identifying the set of sub-bands includes information identifying a set of resource blocks associated with an overlap between the first sub-band and the second sub-band, and wherein the information identifying the set of sub-bands is transmitted via a medium access control (MAC) control element; and
communicating with the UE on at least one sub-band, of the set of sub-bands, in accordance with the information identifying the set of sub-bands.
29 . The method of claim 27 , wherein the information identifying the set of sub-bands further includes information identifying a guard band associated with the overlap between the first sub-band and the second sub-band.