UE configured to determine remaining channel occupancy for UL transmission for shared-spectrum channel access

A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of a User Equipment (UE) configured for operation in a fifth-generation new radio (5G NR) network, wherein for shared spectrum channel access, the processing circuitry is configured to:

• decode a downlink control information (DCI) format 2_0 with cyclic redundancy check (CRC) scrambled by a Slot Format Indicator—Radio Network Temporary Identifier (SFI-RNTI), the DCI format 2_0 received from a generation Node B (gNB) on a channel during a channel occupancy obtained by the gNB, the DCI format 2_0 notifying the UE of a slot format, a channel occupancy time (COT) duration and an available resource block (RB) set indicator for performing a channel access procedure in shared spectrum,
• wherein the available RB set indicator comprises a bitmap, each bit of the bitmap indicating whether an RB set remains available or unavailable until an end of a remaining channel occupancy, and
• wherein the slot format is indicated by a Slot Format Indicator (SFI) index field indicating one or more slot formats;
• determine a duration in time domain and a location in frequency domain of a remaining of the channel occupancy obtained by the gNB based, respectively, on the COT duration and the RB sets that are indicated to remain available indicated by the bitmap;
• and
• perform a channel access procedure for an uplink (UL) transmission on the RB sets that are indicated to remain available within the duration and location of the remaining channel occupancy.

An apparatus for generation Node B (gNB) configured for operation in a fifth-generation new radio (5G NR) network, the apparatus comprising:

• processing circuitry;
• and memory,
• wherein for shared spectrum channel access, the processing circuitry is configured to:
• encode a downlink control information (DCI) format 2_0 with cyclic redundancy check (CRC) scrambled by a Slot Format Indicator—Radio Network Temporary Identifier (SFI-RNTI), the DCI format 2_0 for transmission to a user equipment (UE) on a channel during a channel occupancy obtained by the gNB, the DCI format 2_0 notifying the UE of a slot format, a channel occupancy time (COT) duration and an available resource block (RB) set indicator for performing a channel access procedure in shared spectrum,
• wherein the available RB set indicator comprises a bitmap, each bit of the bitmap indicating whether an RB set remains available or unavailable until an end of a remaining channel occupancy, and
• wherein the slot format is indicated by a Slot Format Indicator (SFI) index field indicating one or more slot formats;
• decode an uplink (UL) transmission from the UE within a duration in time domain and a location in frequency domain of a remaining portion of the channel occupancy, the duration and location of the remaining portion of the channel occupancy is based on the COT duration and the RB sets that are indicated to remain available indicated by the bitmap,
• wherein the memory is configured to store the DCI format 2_0.