Soft resource availability indication for integrated access and backhaul (IAB) operation in paired spectrum
Various embodiments herein include techniques to indicate a reference subcarrier spacing (SCS) in a soft resource availability configuration for an integrated access and backhaul (IAB) distributed unit (DU)/mobile terminal (MT). For example, the reference SCS may be included in soft resource availability radio resource control (RRC) configuration AvailabilityCombinationsPerCell. Additionally, embodiments include mechanisms for dynamic soft availability indication with paired spectrum operation (e.g., frequency division duplex (FDD) operation). Other embodiments may be described and claimed.
1. One or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause an integrated access and backhaul (IAB) distributed unit (DU) to:
receive, in an AvailabilityCombinationsPerCell information element via radio resource control (RRC) signaling, configuration information that includes an indication of a reference subcarrier spacing (SCS) for dynamic soft resource availability indication;
receive a downlink control information (DCI) with a DCI format 2_5 that includes an availability indication; and
determine downlink, uplink, or flexible resources that are available based on the availability indication and the reference SCS.
2. The one or more NTCRM of claim 1 , wherein, to receive the DCI, the IAB DU is to monitor for the DCI in a common search space.
3. The one or more NTCRM of claim 1 , wherein the reference SCS is a first reference SCS for a first frequency carrier, and wherein the configuration information further includes a second reference SCS for dynamic soft resource availability indication associated with a second frequency carrier.
4. The one or more NTCRM of claim 3 , wherein the first frequency carrier is a time domain duplex (TDD) carrier and the second frequency carrier is a supplemental uplink carrier.
5. The one or more NTCRM of claim 3 , wherein the first and second carriers are paired spectrum for frequency domain duplex (FDD) communication.
6. The one or more NTCRM of claim 1 , wherein the availability indication includes a plurality of availability indication values to indicate availability of corresponding resources, wherein individual availability indication values apply to 2{circumflex over ( )}((μ−μ_AI)) consecutive slots in an active downlink (DL) bandwidth part (BWP) or an active uplink (UL) BWP, wherein an earliest slot of the consecutive slots starts at a same time as an earliest slot of an SCS configuration of the reference SCS, wherein μ is an SCS configuration of the active DL BWP or active UL BWP, and wherein μ_AI is the reference SCS.
7. The one or more NTCRM of claim 1 , wherein the availability indication includes a first set of availability indication values for a DL BWP and a second set of availability indication values for a UL BWP.
8. One or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause a device to:
encode, for transmission to an integrated access and backhaul (IAB) distributed unit (DU), configuration information that includes an indication of a reference subcarrier spacing (SCS) for a dynamic soft resource availability indication, wherein the reference SCS is included in an AvailabilityCombinationsPerCell information element transmitted via radio resource control (RRC) signaling; and
encode, for transmission to the IAB DU, a downlink control information (DCI) that includes an availability indication to indicate downlink, uplink, or flexible resources that are available based on the reference SCS.
9. The one or more NTCRM of claim 8 , wherein the DCI is transmitted in a common search space.
10. The one or more NTCRM of claim 8 , wherein the reference SCS is a first reference SCS for a first frequency carrier, and wherein the configuration information further includes a second reference SCS for dynamic soft resource availability indication associated with a second frequency carrier.
11. The one or more NTCRM of claim 10 , wherein the first frequency carrier is a time domain duplex (TDD) carrier and the second frequency carrier is a supplemental uplink carrier.
12. The one or more NTCRM of claim 10 , wherein the first and second carriers are paired spectrum for frequency domain duplex (FDD) communication.
13. The one or more NTCRM of claim 8 , wherein the availability indication includes a plurality of availability indication values to indicate availability of corresponding resources, wherein individual availability indication values apply to 2{circumflex over ( )}((μ−μ_AI)) consecutive slots in an active downlink (DL) bandwidth part (BWP) or an active uplink (UL) BWP, wherein an earliest slot of the consecutive slots starts at a same time as an earliest slot of an SCS configuration of the reference SCS, wherein μ is an SCS configuration of the active DL BWP or active UL BWP, and wherein μ_AI is the reference SCS.
14. The one or more NTCRM of claim 8 , wherein the availability indication includes a first set of availability indication values for a DL BWP and a second set of availability indication values for a UL BWP.
15. The one or more NTCRM of claim 8 , wherein the DCI is a DCI format 2_5.
16. The one or more NTCRM of claim 8 , wherein the device is a parent IAB node or a non-IAB next generation NodeB (gNB).