Abstract: A 5G UE achieves flexible SL time resource granularity by determining which UL/Flexible symbols/slots belong to a symbol-based SL resource pool and a slot-based SL resource pool based on SFI in RRC/GC-PDCCH. The UE then determines which resources are available in each pool based on sensing and selects a resource pool to use so that QoS/latency requirements are met.

Abstract: A wireless transmit/receive unit (WTRU) and a method are described herein regarding preservation of positioning integrity associated with wireless systems. Using multiple positioning configurations and/or schemes (e.g., positioning reference signal (PRS) configurations/schemes), e.g., based on a switching pattern, may ensure integrity (e.g., adequate and/or robust integrity), for example, if error events (e.g., low reference signal received power, blockage of PRS from transmission/reception points (TRPs), etc.) have a persistent duration.

Abstract: The system and method includes PRS scheduling, SL-PRS request and transmission. PRS measurement and report, and autonomous positioning transmission and reporting. The system and method for a WTRU to provision sidelink positioning includes configuring the WTRU with a sidelink positioning service and an associated destination identification (ID), receiving DL-PRS and measurement reporting configuration from a network, transmitting an SL (sidelink)-PRS (positioning reference signal) transmission/reception request using the destination ID to at least one other WTRU requesting the at least one other WTRU to transmit SL-PRS, the request including at least one parameter based on the received measurement reporting configuration and QoS of a positioning service, and performing a PRS measurement and reporting the measurement to the network.

Abstract: The disclosure pertains to methods and apparatus for performing positioning of wireless transmit and/or receive units (WTRUs) in wireless communication systems. A WTRU may receive configuration information indicating a time window associated with positioning. The configuration information may indicate any of a duration and a periodicity of the time window. The WTRU may receive (1) first scheduling information indicating to transmit a first uplink transmission including a sounding reference signal (SRS) and (2) second scheduling information indicating to transmit a second uplink transmission including a positioning SRS (SRSp). The first uplink transmission may not include any SRSp. On condition that the second uplink transmission is scheduled for transmission during the time window, the WTRU may transmit the second uplink transmission during the time window and may transmit the first uplink transmission only when the first uplink transmission is scheduled for transmission outside of the time window.

Abstract: In one or more embodiments, there may be one or more devices, methods, and/or systems addressing or relating to carrier switching for sending uplink control information. In one case, a wireless transmit receive unit (WTRU) may have more than one uplink channel carrier available. The WTRU may determine, or be instructed, which carrier(s) to use in the event that a first carrier cannot be used. The WTRU may receive configuration information that may assist in determining which carrier to use.

Abstract: The disclosure pertains to methods and apparatus for supporting positioning service continuity. One representative method includes receiving, by a wireless transmit/receive unit (WTRU), a configuration for supporting positioning service continuity during a handover. The method additionally includes supporting, by the WTRU, positioning service continuity according to the configuration at least in part by determining one or more transmissions to be performed. The method also includes assisting a radio access network with a data link handover by performing the one or more transmissions according to the configuration.

Abstract: A method performed by a wireless transmit/receive unit (WTRU) may compromise: receiving configured grant (CG) information that includes: a configured grant period, an indication of a number of slots for Transport Block over Multiple Slots (TBoMS), and a mapping pattern; determining, for the CG period, a number of repetitions for a transport block (TB) based on (1) available UL slots in the CG period and (2) the number of slots for TBoMS; and on condition that DMRS bundling is disabled, and the determined number of repetitions is greater than 1, transmitting the TB with the determined number of repetitions where segments of the TB are transmitted according to the mapping pattern for each repetition.

Abstract: A wireless transmit/receive unit (WTRU) determines PDCCH candidates. For a slot, the WTRU determines a number of valid PDCCH candidates associated with at least one search space based on a number of designated search spaces associated with the WTRU in the slot, a type of the search space, a priority associated with the search space, a number of required CCE channel estimates associated with the search space, a maximum number of PDCCH candidates in a slot, and a number of control resource sets (CORESETs) associated with the slot. The WTRU may then attempt to decode CCEs in the at least one search space to recover a PDCCH associated with the WTRU. The WTRU may drop PDCCH candidates from the search space when the number of PDCCH exceeds a maximum value.

Abstract: Method, apparatus, and systems for hybrid automatic repeat request (HARQ) enhancement in wireless communications are disclosed. In one representative embodiment, a method implemented in a wireless transmit/receive unit (WTRU) for wireless communications includes identifying a codebook process from a set of codebook processes based on a first indication, associating a set of bits of hybrid automatic repeat request (HARQ) feedback with the identified codebook process, maintaining the set of bits associated with the identified codebook process based on a condition, receiving a second indication to transmit the set of bits associated with the identified codebook process, and transmitting the set of bits based on the second indication.

Abstract: Methods and apparatuses are described herein for sidelink communication in a wireless transmit/receive unit (WTRU). For example, a first WTRU configured with first and second resource pools may perform at least one congestion measurement of the second resource pool. The first resource pool may be configured for use by the first WTRU for transmission of the first data. The second resource pool may be configured for use by a second WTRU for transmission of the second data associated with a higher priority than the first data. If the at least one congestion measurement of the second resource pool is below a predetermined threshold, the first WTRU may transmit the first data using the first resource pool. If the at least one congestion measurement of the second resource pool is above a predetermined threshold, the first US may not transmit the first data using the first resource pool.

Abstract: A method performed by a first Wireless Transmit/Receive Unit (WTRU) may comprise requesting support from one or more potential assistant WTRUs (A-WTRUs); receiving a response message from one or more potential A-WTRUs, wherein the response message includes information indicating a coverage status within a network of the one or more potential A-WTRUs; determining, based on the received response messages, a set of A-WTRUs from the one or more potential A-WTRUs; determining, based on the coverage status of each one of the determined set of A-WTRUs, a synchronization source; and reporting, to the determined set of A-WTRUs, the determined synchronization source.

Abstract: Method, apparatus, and systems for hybrid automatic repeat request (HARQ) enhancement in wireless communications are disclosed. In one representative embodiment, a method implemented in a wireless transmit/receive unit (WTRU) for wireless communications includes identifying a codebook process from a set of codebook processes based on a first indication, associating a set of bits of hybrid automatic repeat request (HARQ) feedback with the identified codebook process, maintaining the set of bits associated with the identified codebook process based on a condition, receiving a second indication to transmit the set of bits associated with the identified codebook process, and transmitting the set of bits based on the second indication.

Abstract: A wireless transmit/receive unit (WTRU) determines PDCCH candidates. For a slot, the WTRU determines a number of valid PDCCH candidates associated with at least one search space based on a number of designated search spaces associated with the WTRU in the slot, a type of the search space, a priority associated with the search space, a number of required CCE channel estimates associated with the search space, a maximum number of PDCCH candidates in a slot, and a number of control resource sets (CORESETs) associated with the slot. The WTRU may then attempt to decode CCEs in the at least one search space to recover a PDCCH associated with the WTRU. The WTRU may drop PDCCH candidates from the search space when the number of PDCCH exceeds a maximum value.

Abstract: A method performed by a WTRU may comprise receiving PRS configuration information and performing a first set of measurements based on the PRS configuration. The method may further comprise determining whether to trigger an on-demand PRS request based on the first set of measurements and on-demand PRS criteria. On a condition that the determining to trigger is affirmative, transmitting an on-demand PRS request. In embodiments, the on-demand PRS criteria may be based on an RSRP, TDoA, number of multipaths, accuracy and/or latency.

Abstract: A wireless transmit/receive unit (WTRU) may receive/transmit data by employing a discontinuous reception cycle, which may include an awake state and a sleep state. For example, while in an awake state, a WTRU may monitor a PDCCH for a subset of time instances. During the remaining time instances, the WTRU may enter a sleep state, in which the WTRU may switch its receiving circuitry off (e.g., to reduce power consumption). A WTRU may receive (e.g., may expect to receive) one or more transmissions, during an awake state, before entering a sleep state. The durations of an awake state and/or the durations of subsequent sleep states may be determined based on whether the WTRU receives a transmission during the awake state and/or what the transmission was for. The WTRU may modify the value of a sleep state timer based on previous sleep state and/or awake state timer values.

Abstract: Systems, methods, and devices for transferring data with different reliabilities. A wireless transmit/receive unit (WTRU) is configured with a first modulation and coding set (MCS) table and a second MCS table. The WTRU monitors for a radio network temporary identifier (RNTI). If the WTRU detects a first value for the RNTI, data is transferred with a first reliability. If the WTRU detects a second value for the RNTI, data is transferred with a second reliability.

Abstract: Methods, apparatus, systems, architectures and interfaces for determining whether sidelink resources of a sidelink radio bearer are available, and for reserving resources of any number of sidelink radio bearers for transmission of periodic data are provided. The method includes determining any of a size, a period, or a pattern of a resource reservation for periodic data that is to be transmitted by the WTRU via the sidelink radio bearer; determining sidelink resources available for transmission of the periodic data via any number of sidelink radio bearers; and transmitting a message including the resource reservation including information indicating reservation of the available sidelink resources for transmission of the periodic data by the WTRU according to any of the size, the period, or the pattern of a resource reservation, wherein the message includes any of a bearer identifier (ID) or Quality of Service (QoS) information.

Abstract: A wireless transmit receive unit (WTRU) may be configured to monitor physical downlink control channel (PDCCH) candidates of a primary cell (PCell) and a secondary cell (SCell). The WTRU may be configured to determine a time duration for PDCCH candidate budgets for a set of symbols based on a subcarrier spacing associated with the PCell and a subcarrier spacing associated with the SCell. The WTRU may be configured to determine a maximum number of PDCCH candidates to allocate to a search space monitoring occasion of the PCell and the SCell. The maximum number of PDCCH candidates may be based on a per-cell ratio. The WTRU may be configured to allocate PDCCH candidates for the search space monitoring occasion of the PCell and the search space monitoring occasion of the SCell based on the determined maximum number of PDCCH candidates. The WTRU may be configured to decode an allocated PDCCH candidate.

Abstract: Methods and apparatuses are described herein for sidelink communication in a wireless transmit/receive unit (WTRU). For example, a first WTRU configured with first and second resource pools may perform at least one congestion measurement of the second resource pool. The first resource pool may be configured for use by the first WTRU for transmission of the first data. The second resource pool may be configured for use by a second WTRU for transmission of the second data associated with a higher priority than the first data. If the at least one congestion measurement of the second resource pool is below a predetermined threshold, the first WTRU may transmit the first data using the first resource pool. If the at least one congestion measurement of the second resource pool is above a predetermined threshold, the first US may not transmit the first data using the first resource pool.

Abstract: A device (e.g., a wireless transmit/receive unit (WTRU)) may determine which information (e.g., among multiple transport blocks (TBs)) to be sent on resource(s) of a physical uplink channel (PUCCH) transmission occasion of a configured grant (CG). In an example, the device may receive configuration information. The configuration information may indicate a resource associated with the CG. The device may determine whether to transmit (e.g., on the resource associated with CG) first information of a first TB or second information of a second TB based on one or more of downlink feedback information (DPI) reception, a reason why information of a TB (e.g., the first TB or the second TB) has not been sent in a prior transmission, and a nature of the content (e.g., control information vs. data) in the TB. The first TB may comprise the first information and the second TB may comprise the second information.