Abstract: Methods and apparatus for beam refinement are disclosed. A wireless transmit/receive unit (WTRU) may be configured to receive configuration information. The configuration information may indicate an association between preambles, synchronization signal blocks (SSBs), reference signal (RS) sets, and physical uplink shared channel (PUSCH) resources. The WTRU may be configured to receive a plurality of SSBs, determine a measurement of the received SSBs, and select an SSB based on the determined measurement. The WTRU may be configured to select and transmit a preamble using a first beam. The WTRU may be configured to receive a plurality of sets of RSs based on the transmitted preamble and determine a measurement of the received sets of RSs. The WTRU may be configured to select a RS based on the determined measurement of the received sets of RSs. The WTRU may be configured to transmit uplink data on a PUSCH using a second beam.

Abstract: Methods and apparatus for wireless transmit/receive unit (WTRU) power control are described. A method includes receiving a time domain resource allocation (TDRA) list configuration including entries, each including a resource allocation that includes a slot offset value. L1 signaling is received indicating a minimum slot offset value. Downlink control information (DCI) is decoded on a physical downlink control channel in a slot. An index is obtained from the decoded DCI, identifying an entry in the TDRA list. A particular slot offset value identified by the index is retrieved from the TDRA list and compared with the minimum slot offset value. If the particular slot offset value is less than the minimum slot offset value, the entry is invalid. If the particular slot offset value is greater than or equal to the minimum slot offset value, a physical downlink shared channel is received.

Abstract: Systems, methods, and devices for addressing power savings signals in wireless communication. A wireless transmit receive unit (WTRU) may monitor for an energy saving signal (ESS) while the WTRU is asleep (e.g., prior to a discontinuous reception (DRX) ON duration that includes one or more search spaces). The WTRU may measure the energy of the ESS. If the ESS is below a threshold, the WTRU fallback to a default operation or continue in a current operating mode (e.g., remain asleep to save power). If the ESS is above a threshold, the ESS may be received using a coverage enhancement (CE) level based on a parameter associated with a search space. The parameter may be the highest aggregation level of the one or more search spaces.

Abstract: A method performed by a base station includes transmitting configuration information indicating a plurality of physical uplink control channel (PUCCH) resources for transmitting uplink control information (UCI) and one or more thresholds associated with a number of hybrid automatic repeat request (HARQ) bits to be included in the UCI. Each of the plurality of PUCCH resources is associated with at least one PUCCH format and a respective number of orthogonal frequency division multiplexing (OFDM) symbols. The base station transmits a physical downlink control channel (PDCCH) transmission indicating to transmit the UCI. The base station receives a PUCCH transmission that includes the UCI, using one of the PUCCH resources and an associated PUCCH format. The UCI includes a number of HARQ bits that satisfies one of the indicated thresholds, and the PUCCH transmission includes a number of OFDM symbols corresponding to the PUCCH format.

Abstract: Methods, apparatuses, systems, devices, and computer program products directed to phase-continuous frequency selective precoding are provided. Included among these classes are methods for use in connection with dynamic precoding resource block group (PRG) configuration and with codebook based transmission configuration. A representative of such methods may include any of receiving signaling indicating transmit precoding information; determining a candidate PRG size using any of the transmit precoding information, a rule for determining a PRG size and configured PRG sizes; and configuring or reconfiguring a wireless transmit/receive device in accordance with the candidate PRG size.

Abstract: Systems, methods and instrumentalities are disclosed for beam-based PDCCH Transmission in NR. Control resource sets may be assigned for multi-beam control transmission. A PDCCH may be transmitted with multiple beams. CCEs may be mapped for multi-beam transmission. DCI may support multi-dimensional transmission with primary and secondary dimensions. Search space may support multi-beam, multi-TRP transmission.

Abstract: A wireless transmit/receive unit (WTRU) may receive a PDCCH transmission comprising a CCE that is mapped to one or more REGs based on a CCE-to-REG mapping. The WTRU may receive the CCE-to-REG mapping that indicates a REG bundle corresponding to the CCE and use the CCE-to-REG mapping to identify the REGs for the WTRU. Depending on whether the CCE-to-REG mapping is interleaving or noninterleaving, the CCE-to-REG mapping may be based on different parameters. If the CCE-to-REG mapping is interleaving, the CCE-to-REG mapping may be based on an index associated with the CCE and a number of REGs in the REG bundle. If the CCE-to-REG mapping is noninterleaving, the CCE-to-REG mapping may be based on the index of the CCE.

Abstract: Methods and systems for sending and receiving an enhanced downlink control channel are disclosed. The method may include receiving control channel information via an enhanced control channel. The method may also include using the control channel information to receive a shared channel. The method may include detecting the presence of the enhanced control channel in a given subframe. The enhanced control channel may be transmitted over multiple antenna ports. For example, code divisional multiplexing and de-multiplexing and the use of common and UE-specific reference signals may be utilized. New control channel elements may be defined, and enhanced control channel state information (CSI) feedback may be utilized. The presence or absence of legacy control channels may affect the demodulation and or decoding methods. The method may be implemented at a WTRU.

Abstract: A wireless transmit/receive unit (WTRU) may receive first uplink (UL)-downlink (DL) configuration information indicating a first UL-DL configuration for a first set of physical resource blocks (PRBs), and may receive second UL-DL configuration information indicating a second UL-DL configuration for a second set of PRBs. The second set of PRBs is next to, in frequency, the first set of PRBs. The WTRU may receive a physical downlink shared channel (PDSCH) transmission in a DL direction of first time units in the first set of PRBs, based on the first UL-DL configuration. The WTRU may transmit first acknowledgement (ACK)/negative ACK (NACK) information, based on the PDSCH transmission, in a UL direction of second time units in the second set of PRBs. The UL direction of the one or more second time units is based on the second UL-DL configuration. The second UL-DL configuration is based on the first UL-DL configuration.

Abstract: A WTRU may receive a plurality of monitoring configurations. The plurality of monitoring configurations may be associated with a plurality of sub-bands. The WTRU may apply a monitoring configuration based on the location of a slot inside or outside of a COT. For example, the WTRU may apply (e.g., use) a first monitoring configuration outside a COT. The WTRU may apply a second monitoring configuration in a first slot of a COT. The WTRU may apply a third monitoring configuration to the slots of a COT subsequent to the first slot of the COT. The WTRU may switch back to the first monitoring configuration on a condition that the COT ends.

Abstract: Methods and apparatus for transmitting a hybrid automatic repeat request acknowledgment (HARQ-ACK) are disclosed. A wireless transmit/receive unit (WTRU) may transmit a random access channel (RACH) message-A to a gNB. The WTRU may receive a RACH message-B from the gNB in response to the message-A. The message-B may comprise downlink control information (DCI). The WTRU may decode a physical downlink shared channel (PDSCH) based on the DCI. The WTRU may determine that contention resolution is successful. The WTRU may determine a resource for a physical uplink control channel (PUCCH). The WTRU may transmit a HARQ-ACK over the determined PUCCH resource. The WTRU may determine the resource for the PUCCH based on a PUCCH resource index. The PUCCH resource index may be based on a random access preamble index (RAPID) and a PUCCH resource indicator (PRI).

Abstract: Methods and apparatus for wireless transmit/receive unit (WTRU) power control are described. A method includes receiving a time domain resource allocation (TDRA) list configuration including entries, each including a resource allocation that includes a slot offset value. L1 signaling is received indicating a minimum slot offset value. Downlink control information (DCI) is decoded on a physical downlink control channel in a slot. An index is obtained from the decoded DCI, identifying an entry in the TDRA list. A particular slot offset value identified by the index is retrieved from the TDRA list and compared with the minimum slot offset value. If the particular slot offset value is less than the minimum slot offset value, the entry is invalid. If the particular slot offset value is greater than or equal to the minimum slot offset value, a physical downlink shared channel is received.

Abstract: Systems, methods, and instrumentalities are described herein regarding enhancements of physical channels in Multi-TRP. Reliability enhancements are provided for physical downlink control channel (PDCCH), including, for example, enhanced support for a control resource set (CORESET) combining. Reliability enhancements are provided for physical uplink control channel (PUCCH), including, for example, activation/deactivation of repetition combining, resource selection, etc. Reliability enhancements are provided for physical uplink shared channel (PUSCH), including, for example, spatial relation determination and signaling, configured and dynamic grant enhancements, etc.

Abstract: A method performed by a by a wireless transmit/receive unit (WTRU) includes receiving configuration information for transmitting a physical uplink control channel (PUCCH) and determining a resource for transmitting the PUCCH transmission. The method further includes transmitting the PUCCH transmission using the determined resource and a format associated with the determined PUCCH resource.

Abstract: Methods and apparatuses for joint channel state information (CSI) measurement are described herein. A method may include receiving channel state information reference signals (CSI-RSs) from first and second transmit/receive points (TRPs), determining CSI, and selecting one of the TRPs as a primary TRP and a remaining one of the first TRP or the second TRP as a secondary TRP. The method may include reporting information indicating a first CSI for the primary TRP and receiving second CSI-RSs from the TRPs. The method may include determining a second CSI and a precoding matrix indicator (PMI) for the primary TRP, and determining channel coding information for the primary TRP. The method may include determining a second CSI for the secondary TRP, determining, based on channel coding information and the second CSI for the secondary TRP and a PMI for the secondary TRP, and reporting information indicating the PMI for the second TRP.

Abstract: Multiple Access (MA) signature (MAS) features may be provided, for example, MAS pool definition and/or configuration may be provided. MAS indicator transmission may be provided. For example, independent indication through demodulation reference signal (DMRS) transmission and/or scheduling request (SR)-based transmission may be provided. Reliable MA detection may be provided. For example, multiple zone transmission and/or diversity may be provided. Non-orthogonal multiple-access (NOMA) transmission without MAS indication may be provided. Physical uplink control channel (PUCCH)-based NOMA indication may be provided. NOMA layer indicator (NLI) based NOMA indication may be provided.

Abstract: A WTRU may include a memory and a processor. The processor may be configured to receive beam grouping information from a gNB or transmission and reception point (TRP). The beam grouping information may indicate a group of beams that the WTRU may report using group-based reporting. The group-based reporting may be a reduced level of reporting compared to a beam-based reporting. The group-based report may include measurement information for a representative beam. The representative beam may be one of the beams in the group or represents an average of the beams in the group. Alternatively, the representative beam may be a beam that has a maximum measurement value compared to other beams in the group. The group-based report may include a reference signal received power (RSRP) for the representative beam and a differential RSRP for each additional beamin the beam group.

Abstract: A WTRU may receive downlink control information (DCI) from a first transmission/reception (TRP). The DCI may indicate that the WTRU is to transmit a physical random access channel (PRACH) transmission. The DCI may include an indication of a preamble, an indication of a first PRACH mask, and/or an indication associated with a first synchronization signal block (SSB), and/or an indication of a reference signal (RS). The WTRU may be configured to transmit the preamble, to a second TRP, the preamble in a first PRACH resource. The first TRP and/or the second TRP may be associated with a same physical cell identity (PCI). The WTRU may receive, from the second TRP, a first response to the preamble. The first response may include a first timing advance (TA) command for the second timing alignment for transmission to the second TRP and/or an index indicating the second TRP.

Abstract: A wireless transmit/receive unit (WTRU) may receive a PDCCH transmission comprising a CCE that is mapped to one or more REGs based on a CCE-to-REG mapping. The WTRU may receive the CCE-to-REG mapping that indicates a REG bundle corresponding to the CCE and use the CCE-to-REG mapping to identify the REGs for the WTRU. Depending on whether the CCE-to-REG mapping is interleaving or noninterleaving, the CCE-to-REG mapping may be based on different parameters. If the CCE-to-REG mapping is interleaving, the CCE-to-REG mapping may be based on an index associated with the CCE and a number of REGs in the REG bundle. If the CCE-to-REG mapping is noninterleaving, the CCE-to-REG mapping may be based on the index of the CCE.

Abstract: A wireless transmit/receive unit (WTRU) may receive configuration information indicating a set of physical channel frequency resources. The WTRU may receive indication information indicating an allocation of at least a subset of the set of physical channel frequency resources. Further, the WTRU may determine a time period, and one or more physical channel frequency resources from the subset of the set of physical channel frequency resources. The WTRU may transmit data in a physical shared channel transmission using the determined one or more physical shared channel frequency resources during the determined time period. Further, the WTRU may determine a time location for reception of hybrid automatic repeat request acknowledgement (HARQ-ACK) information associated with the transmitted data, and the determination of the time location may be based on the subset of the set of physical channel frequency resources. The WTRU may receive the HARQ-ACK information during the determined time location.