Switching between subband full duplex and half duplex modes for different periodicities

1 . An apparatus for wireless communication at a user equipment (UE), comprising:

memory; and

at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:

operate in at least one of a downlink (DL) or uplink (UL) subband (SB) full duplex (SBFD) mode associated with a SBFD operation or a half-duplex (HD) mode, wherein the SBFD operation is associated with a first set of time and frequency resources and the HD mode is associated with a second set of time and frequency resources, wherein the first set of time and frequency resources includes a set of DL and UL SBs;

obtain at least one of (1) a first indication of a time and frequency location for each DL or UL SB of the set of DL and UL SBs in the SBFD operation associated with the SBFD mode, or (2) a second indication of the second set of time and frequency resources associated with the HD mode; and

switch to operate in another of the SBFD mode or the HD mode based on at least one of the first indication or the second indication.

2 . The apparatus of claim 1 , wherein each SB of the set of DL and UL SBs is configured as a resource block (RB) set within a corresponding bandwidth part (BWP) in a set of BWPs or a corresponding component carrier (CC) in a set of CCs.

3 . The apparatus of claim 2 , wherein the each SB of the set of DL and UL SBs is configured as the RB set based on a lack of support of the UE for HD-to-SBFD mode filter switching.

4 . The apparatus of claim 2 , wherein the each SB of the set of DL and UL SBs is configured as the RB set and is associated with an adjustable scheduling offset that is greater than or equal to a SBDF filter adaptation latency of the UE.

5 . The apparatus of claim 1 , wherein each SB of the set of DL and UL SBs is configured as a corresponding BWP in a set of BWPs.

6 . The apparatus of claim 5 , wherein the set of DL and UL SBs includes one or more DL SBs and at least one UL SB, and the set of BWPs includes one or more DL BWPs and an UL BWP, wherein each of the one or more DL SBs is configured as a corresponding DL BWP and the UL SB is configured as a corresponding UL BWP, and wherein the one or more DL BWPs are active at a single time instance and the UL BWP is active at the single time instance.

7 . The apparatus of claim 5 , wherein the set of DL and UL SBs includes a DL SB and one or more UL SBs, and the set of BWPs includes a DL BWP and one or more UL BWPs, wherein the DL SB is configured as a corresponding DL BWP and each of the one or more UL SBs is configured as a corresponding UL BWP, and wherein the DL BWP is active at a single time instance and the one or more UL BWP are active at the single time instance.

8 . The apparatus of claim 7 , wherein the one or more DL SBs include two non-contiguous DL SBs, wherein the two non-contiguous DL SBs are configured as a non-contiguous DL BWP, wherein the non-contiguous DL BWP is active at the single time instance and the corresponding UL BWP is active at the single time instance.

9 . The apparatus of claim 5 , wherein the set of DL and UL SBs includes one or more DL SBs and an UL SB, wherein the one or more DL SBs are configured as a corresponding DL BWP and the UL SB is configured as a corresponding UL BWP, wherein the corresponding DL BWP and the corresponding UL BWP include a same center frequency.

10 . The apparatus of claim 5 , wherein the set of DL and UL SBs includes a DL SB and one or more UL SBs, wherein the DL SB is configured as a corresponding DL BWP and the one or more UL SBs are configured as a corresponding UL BWP, wherein the corresponding DL BWP and the corresponding UL BWP include a same center frequency.

11 . The apparatus of claim 10 , wherein the one or more UL SBs include two non-contiguous UL SBs, wherein the two non-contiguous UL SBs are configured as a non-contiguous UL BWP, wherein the non-contiguous UL BWP is active at a single time instance and the corresponding DL BWP is active at the single time instance.

12 . The apparatus of claim 5 , wherein the each SB of the set of DL and UL SBs is configured as the corresponding BWP in the set of BWPs if the UE supports HD-to-SBFD mode filter switching.

13 . The apparatus of claim 5 , wherein the each SB of the set of DL and UL SBs is configured as the corresponding BWP in the set of BWPs and is associated with an adjustable scheduling offset that is less than a BWP switching latency of the UE.

14 . The apparatus of claim 1 , wherein the switch to operate in the another of the SBFD mode or the HD mode is associated with a filter switching capability of the UE, and wherein the filter switching capability corresponds to a latency of the switch to operate in the another of the SBFD mode or the HD mode.

15 . The apparatus of claim 14 , wherein the latency of the switch is associated with at least one of: a scheduling offset or a guard band, wherein the scheduling offset is associated with semi-persistent (SP) switching and aperiodic (AP) switching, and wherein the guard band is associated with periodic (P) switching or the AP switching.

16 . The apparatus of claim 15 , wherein the latency of the switch is associated with the scheduling offset, and wherein the at least one processor is further configured to:

receive an indication of the scheduling offset via at least one of a radio resource control (RRC) message, a configuration information element (IE), DL control information (DCI) associated with scheduling data, or a medium access control (MAC)-control element (MAC-CE).

17 . The apparatus of claim 16 , wherein the scheduling offset is based on signaling and comprises a number of symbols having a subcarrier spacing (SCS) associated with the signaling or a duration of time, wherein the signaling includes at least one of:

the DCI associated with the scheduling data,

a first acknowledgement (ACK) of the DCI associated with the scheduling data,

a UL transmission associated with the DCI associated with the scheduling data, or

a second ACK of other DCI not associated with the scheduling data.

18 . The apparatus of claim 15 , wherein the latency of the switch is associated with the scheduling offset and the guard band for the AP switching; and

wherein a time period of the SBFD mode or the HD mode for the AP switching comprises at least one of a number of symbols or a duration of time.

19 . The apparatus of claim 18 , wherein the at least one processor is further configured to:

switch back to operate in the one of the SBFD mode or the HD mode subsequent to a length of time corresponding to the guard band, wherein the length of time is responsive to an end of the time period.

20 . The apparatus of claim 14 , wherein the at least one processor is further configured to:

transmit, to a network node and prior to the at least one of the first indication or the second indication being obtained, an indication of the filter switching capability of the UE for at least one of:

support of the UE for SBFD operations;

support of the UE for at least one of HD-to-SBFD mode transmitter or receiver filter switching;

at least one of a type of the HD-to-SBFD mode transmitter or receiver filter switching of the UE; or

a bandwidth part (BWP) switching delay of the UE; and

wherein at least one of the first indication or the second indication is based on at least a portion of the indication of the filter switching capability of the UE.

21 . The apparatus of claim 1 , further comprising at least one transceiver coupled to the at least one processor, wherein to obtain at least one of the first indication or the second indication, the at least one processor is configured to: receive, from a network node, at least one of the first indication or the second indication via the at least one transceiver.

22 . The apparatus of claim 1 , wherein one of the first indication or the second indication is obtained, wherein the switch to operate in the another of the SBFD mode or the HD mode is based on at least one of a switch in time or a switch in frequency associated with a semi-static switching pattern.

23 . An apparatus for wireless communication at a network node, comprising:

memory; and

at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:

configure a time and frequency location for each of a first set of time and frequency resources in a subband (SB) full duplex (SBFD) operation associated with a SBFD mode and a second set of time and frequency resources associated with a half-duplex (HD) mode, wherein the first set of time and frequency resources includes a set of downlink (DL) and uplink (UL) SBs; and

transmit, for a user equipment (UE), at least one of (1) a first indication of the time and frequency location for each DL or UL SB of the set of DL and UL SBs in the SBFD operation associated with the SBFD mode, or (2) a second indication of the second set of time and frequency resources associated with the HD mode.

24 . The apparatus of claim 23 , wherein each SB of the set of DL and UL SBs is configured as a resource block (RB) set within a corresponding bandwidth part (BWP) in a set of BWPs or a corresponding component carrier (CC) in a set of CCs; or

wherein each SB of the set of DL and UL SBs is configured as a corresponding BWP in the set of BWPs.

25 . The apparatus of claim 24 , wherein each SB of the set of DL and UL SBs is configured as a corresponding BWP in the set of BWPs; and

wherein the set of DL and UL SBs includes one or more DL SBs and at least one UL SB, and the set of BWPs includes one or more DL BWPs and an UL BWP, wherein each of the one or more DL SBs is configured as the corresponding DL BWP and the UL SB is configured as the corresponding UL BWP, and wherein the one or more DL BWPs are active at a single time instance and the UL BWP is active at the single time instance,

wherein the set of DL and UL SBs includes a DL SB and one or more UL SBs, and the set of BWPs includes a DL BWP and one or more UL BWPs, wherein the DL SB is configured as the corresponding DL BWP and each of the one or more UL SBs is configured as the corresponding UL BWP, and wherein the DL BWP is active at the single time instance and the one or more UL BWP are active at the single time instance,

wherein the set of DL and UL SBs includes one or more DL SBs and an UL SB, wherein the one or more DL SBs are configured as a corresponding DL BWP and the UL SB is configured as a corresponding UL BWP, wherein the corresponding DL BWP and the corresponding UL BWP include a same center frequency, or

wherein the set of DL and UL SBs includes a DL SB and one or more UL SBs, wherein the DL SB is configured as a corresponding DL BWP and the one or more UL SBs are configured as a corresponding UL BWP, wherein the corresponding DL BWP and the corresponding UL BWP include the same center frequency.

26 . The apparatus of claim 25 , wherein the one or more DL SBs include two non-contiguous DL SBs, wherein the two non-contiguous DL SBs are configured as a non-contiguous DL BWP, wherein the non-contiguous DL BWP is active at the single time instance and the corresponding UL BWP is active at the single time instance; or

wherein the one or more UL SBs include two non-contiguous UL SBs, wherein the two non-contiguous UL SBs are configured as a non-contiguous UL BWP, wherein the non-contiguous UL BWP is active at the single time instance and the corresponding DL BWP is active at the single time instance.

27 . The apparatus of claim 23 , wherein each SB of the set of DL and UL SBs is configured as a resource block (RB) set for at least one of:

a UE-dedicated configuration, or a cell-common configuration.

28 . The apparatus of claim 23 , wherein the at least one processor is further configured to:

configure at least one of: a scheduling offset or a guard band, wherein the scheduling offset is associated with semi-persistent (SP) switching and aperiodic (AP) switching, and wherein the guard band is associated with periodic (P) switching or the AP switching; and

wherein a filter switching capability of the UE is associated with at least one of: the scheduling offset for the SP switching, the guard band for the P switching, or the scheduling offset and the guard band for the AP switching.

29 . A method of wireless communication at a user equipment (UE), comprising:

operating in at least one of a downlink (DL) or uplink (UL) subband (SB) full duplex (SBFD) mode associated with a SBFD operation or a half-duplex (HD) mode, wherein the SBFD operation is associated with a first set of time and frequency resources and the HD mode is associated with a second set of time and frequency resources, wherein the first set of time and frequency resources includes a set of DL and UL SBs;

obtaining at least one of (1) a first indication of a time and frequency location for each DL or UL SB of the set of DL and UL SBs in the SBFD operation associated with the SBFD mode, or (2) a second indication of the second set of time and frequency resources associated with the HD mode; and

switching to operate in another of the SBFD mode or the HD mode based on at least one of the first indication or the second indication.

30 . A method of wireless communication at a network node, comprising:

configuring a time and frequency location for each of a first set of time and frequency resources in a subband (SB) full duplex (SBFD) operation associated with a SBFD mode and a second set of time and frequency resources associated with a half-duplex (HD) mode, wherein the first set of time and frequency resources includes a set of downlink (DL) and uplink (UL) SBs; and

transmitting, for a user equipment (UE), at least one of (1) a first indication of the time and frequency location for each DL or UL SB of the set of DL and UL SBs in the SBFD operation associated with the SBFD mode, or (2) a second indication of the second set of time and frequency resources associated with the HD mode.