Abstract: A wireless transmit receive unit (WTRU) may receive a set of candidate resources, which may be used for transmission. The WTRU may periodically perform CCA on a channel (e.g., before transmitting on the channel). When the channel is determined to be free, the WTRU may determine a resource for transmission from the candidate resources. The resource may be determined based on the time remaining in the time period. For example, when the time remaining in the time period is shorter, the WTRU may determine to transmit on a resource that comprises more frequency resources. The WTRU may determine a Multiple Input Multiple Output (MIMO) scheme based on the number of frequency resources. The WTRU may send a transmission on the resource, which may include a demodulation reference signal (DM-RS). The DM-RS may indicate the resource used from transmission to a receiver of the transmission.

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: A wireless transmit/receive unit (WTRU) may receive downlink control information (DCI) including a downlink grant. Further, the WTRU may receive a downlink transmission scheduled by the downlink grant. Also, the WTRU may determine a start time for an uplink transmission, wherein the uplink transmission includes hybrid automatic repeat request (HARQ)-acknowledgment (ACK) information, wherein the HARQ-ACK information is based on the downlink transmission. In addition, the WTRU may determine an available processing time associated with the HARQ-ACK information. On a condition that the determined start time for the uplink transmission is later than an uplink symbol time that is at least the determined available processing time after the end of a time unit at the end of the downlink transmission, the WTRU may transmit the uplink transmission including the HARQ-ACK information.

Abstract: There may be one or more systems, methods, and/or devices that address a relay wireless communication scenario. For example, in such a scenario, there may be at least three entities, a remote a wireless transmit receive unit (WTRU) may need to communicate with a network node (e.g., gNB) and/or another WTRU that it cannot directly communicate with. This remote WTRU may communicate with a relay WTRU in order to communicate with the ultimate destination (e.g., another WTRU or a network node). The use of a relay may require establishment and configuration of one or more entities involved.

Abstract: Systems, methods, and devices for sidelink transmit-receive distance related determinations are disclosed herein. In one example, a wireless transmit receive unit (WTRU) may be configured with an associate between range information and zone configuration. The WTRU receive an indication of a specific range information requirement and determine its own zone location based on the configured information and location means (e.g., GPS). The WTRU may also receive zone location information of a transmitting device, and determine the distance between the WTRU and the transmitting device.

Abstract: A wireless transmit/receive unit (WTRU) may receive a time division duplex (TDD) uplink (UL)/downlink (DL) configuration. Also, the WTRU may receive restriction pattern indication information. The WTRU may determine, based on both the received TDD UL/DL configuration information and the received restriction pattern indication information, one or more time intervals to use for transmitting one or more physical uplink shared channel (PUSCH) repetition transmissions. Further, the WTRU may transmit a PUSCH. Also, the WTRU may transmit at least one PUSCH repetition transmission. In addition, the WTRU may transmit at least one PUSCH repetition transmission in at least one of the determined one or more time intervals to use for transmitting UL repetitions, wherein the at least one PUSCH repetition transmission is a repetition of the PUSCH transmission. In an example, the TDD UL/DL configuration information may be included in a system information block (SIB).

Abstract: Methods for receiving downlink control information (DCI) are provided herein. A method performed by a wireless transmit/receive unit (WTRU) may include receiving configuration information configuring a set of normal physical downlink control channel (nPDCCH) candidates, receiving a first transmission including first downlink control information (DCI), the first DCI including a first monitoring indicator having a first value, and skipping, based on the first monitoring indicator, monitoring of the set of nPDCCH candidates during a first time window. The method may include receiving a second PDCCH transmission including second DCI, the second DCI including a second monitoring having a second value, monitoring, based on the second monitoring indicator, the set of nPDCCH candidates during a second time window, and decoding a PDCCH transmission detected in the monitored set of nPDCCH candidates to receive third DCI, wherein the third DCI includes information indicating a downlink grant or an uplink grant.

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 apparatuses are described herein for monitoring radio links between wireless transmit/receive units (WTRUs) and determining of radio link failure, and may be used, among others, for New Radio (NR) vehicular communication (V2X); a mode whereby WTRUs can communicate with each other directly. A radio link between a WTRU and another WTRU may be monitored independently per ongoing unicast and/or multicast link, and radio link failure (RLF) may be determined as a function of the monitoring.

Abstract: Power efficient measurements may be implemented for high frequency operations. A WTRU may determine measurement occasions, DRX cycle/configuration transitions, DRX pause/resume, DRX timer operation, and/or BFR based on scheduling activity, beam configuration, BFI detection, BFD, beam loss, etc. A WTRU may be configured with multiple DRX cycles and measurement opportunities (e.g., with different periodicities). The WTRU may perform (e.g., RS) measurement(s) with determined/configured timing (e.g., DRX on-durations) in a first DRX cycle based on condition(s). The WTRU may switch to a second DRX cycle and perform RS measurement(s) with determined/configured timing based on condition(s) (e.g., counted number of BFIs detected in first DRX cycle). The WTRU may switch from the second (e.g., short) DRX cycle to the first (e.g., long) DRX cycle or to non-DRX operation (e.g., DRX suspension or reset DRX inactivity timer) based on condition(s) (e.g., number of BFIs in first and/or second DRX cycle(s)).

Abstract: Embodiments contemplate methods, systems, and apparatuses for interference measurement in a wireless communication network, including wireless communication networks the employ MIMO in uplink and/or downlink communication. Embodiments contemplate identifying one or more interference measurement resource elements that may be received from one or more transmission points. Embodiments also contemplate performing interference measurement estimation based at least in part on the identified one or more interference measurement resource elements. Channel state information (CSI) perhaps in the form of reports may be generated based at least in part on the one or more interference measurement estimation. Embodiments also contemplate that the CSI report may be transmitted to one or more nodes. In some embodiments, the one or more interference measurement resource elements may be received as part of a set of resource elements.

Abstract: A method to reserve a directional channel, such as in an unlicensed spectrum for instance, is disclosed. In an example embodiment, the method may be performed by a receiving node, such as a user equipment (UE) for instance. In such method, the receiving node may receive an enhanced directional transmit request message from a transmitting node and transmit an enhanced directional transmit confirmation message using one or more first beams, with at least one first beam being directed in a first direction towards the transmitting node. Further, the receiving node may transmit at least one additional enhanced directional transmit confirmation message using one or more second beams, with at least one second beam being directed in a second direction towards a potentially interfering node. In the method, the second direction is a different direction than the first direction.

Abstract: A SL wireless transmit/receive unit (WTRU), configured in mode 1, with SL transmissions on unlicensed spectrum, may receive a SL grant from a gNodeB (gNB) and determine whether the SL grant falls within a COT initiated by another WTRU, based on COT structure information received from SCI transmissions of other WTRUs. If the SL grant falls within the COT initiated by another WTRU, the WTRU may perform a first LBT type to try to share the COT. If the SL grant does not fall within the COT initiated by another WTRU, the WTRU may perform a second LBT type to try to initiate its own COT. If LBT fails for the grant, the WTRU may report a failed LBT to the gNB in UCI.

Abstract: Systems, methods, and instrumentalities are described herein for enabling positioning, for example, in unlicensed spectrum. A wireless transmit/receive unit (WTRU) may monitor for reference signals (e.g., positioning reference signals) in the unlicensed spectrum. The WTRU may fallback to a different positioning configuration. For example, the WTRU may fallback to monitor for reference signals in the unlicensed spectrum within a discovery reference signal window. For example, the WTRU may fallback to monitor for reference signals in a licensed spectrum. The WTRU may determine to fallback to a different positioning configuration, for example, based on whether reference signals are determined to be missing (e.g., consecutive missing reference signals).

Abstract: Systems, methods, and devices for collaborative positioning. A wireless transmit/receive unit (WTRU) is configured to perform and report positioning measurements including SL collaborative measurements. The WTRU serving as an anchor WTRU may select a set of member WTRUs for distributing the PRS measurement configurations based on the inter-WTRU distance measured over a SL. The selected subset of member WTRUs each provide measurement report to the anchor WTRU. The anchor WTRU reports to the LMF the measurements received from the member WTRUs and the associated SL distance measurements.

Abstract: Methods, apparatus, systems, architectures, and interfaces for a wireless transmit receive unit (WTRU) performing sidelink communications are provided.

Abstract: Methods and apparatuses are described herein for paging procedures in wireless systems. For example, a wireless transmit receive unit (WTRU) may monitor one or more physical downlink control channels (PDCCHs) for paging resources associated with a first subset of synchronization signal (SS) blocks that corresponds to a first beam tracking area (BTA). On a condition that at least one measurement of at least one beam associated with the first subset of SS blocks is less than a predetermined threshold, the WTRU may transmit, to a base station (BS), a signal indicating a second BTA that is associated with a second subset of SS blocks. The signal includes a physical random access channel (PRACH) resource associated with a second group of SS blocks that corresponds to the second BTA.

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, receives a plurality of positioning reference signals from a plurality of terrestrial transmission points, the positioning reference signals including at least one positioning reference signal from a first terrestrial transmission point and at least one positioning signal from a second terrestrial transmission point, on condition that at least one value based on first measurements of the plurality of positioning reference signals satisfies a condition, transmits a request to initiate, at the WTRU, positioning using positioning reference signals received from satellites, received, in response to the request, information about a set of satellites, selects at least one satellite from the set of satellites, determines a second position estimate for the WTRU based on at least one positioning reference signal received from at least one selected satellite, and sends to a network node a message comprising information indicating the second position estimate for the WTRU.

Abstract: The disclosure pertains to methods and apparatus using V2X enhancements to perform discontinuous reception. In an embodiment, a method implemented by a first WTRU, for a device-to-device (D2D) communication between the first WTRU and a second WTRU, the method may include any of comprising receiving, from the second WTRU, D2D control information comprising: (1) first information indicating one or more first transmission resources reserved for transmission of the D2D communication and (2) second information indicating if at least one second transmission resource is reserved for retransmission of the D2D communication; determining a sleeping period for the first WTRU that ends prior to a reception time of the retransmission of the D2D communication, wherein the sleeping period is based on the second information; and receiving the retransmission of the D2D communication, after an end of the determined sleeping period.