Abstract: Methods and apparatuses for accessing a wireless network are provided herein. A method according to at least one embodiment includes receiving a transmission including system information indicating a random access channel (RACH) configuration. The RACH configuration may indicate one or more RACH occasions and one or more preambles, each of the RACH occasions associated with at least one of the one or more preambles. The method may include receiving one or more reference signals and transmitting one of the preambles in a RACH occasion that is associated with the transmitted preamble. The transmitted preamble may be selected for transmission based on a measurement of the received one or more reference signals, and wherein the transmitted preamble is transmitted using beamforming parameters derived based on the received one or more reference signals.

Abstract: Systems, apparatuses, and methods are disclosed for receiving downlink control information (DCI) that may include an indication of a reference measurement resource (RMR), receiving an indication of a measurement configuration, and receiving an indication of a feedback resource configuration. A measurement report based on the indication of an RMR, an indication of a measurement configuration, and an indication of a feedback resource configuration may be generated and may be transmitted to a network device.

Abstract: A wireless transmit/receive unit (WTRU) may monitor LBT subbands to determine when a COT is activated. A WTRU may vary monitoring based on whether the WTRU received a full or partial COT structure. A WTRU may interpret a scheduling grant based on the set of acquired LBT subbands. A WTRU may determine a channel access priority (CAP) associated with a COT. A WTRU may indicate a CAP used to acquire a COT. A WTRU may receive an indication of a CAP used by a network to start a COT. A WTRU may determine a logical channel restriction based on a CAP associated with the COT. A WTRU may determine whether a logical channel may be included in a transmission during a COT based on a logical channel restriction. A transmission may be during a COT via a subband(s).

Abstract: Systems, methods, and instrumentalities are disclosed for uplink (UL) transmissions in wireless systems. The systems, methods and instrumentalities may include a wireless transmit/receive unit (WTRU) with a receiver configured to receive one or more uplink (UL) grants that may include allocations associated with a regular UL (RUL) carrier and a supplementary UL (SUL) carrier. The RUL and SUL carriers may be associated with a common downlink (DL) carrier of a serving cell. The WTRU may include a processor configured to select data from one or more logical channels for transmission in accordance with the allocations. The WTRU may include a transmitter configured to transmit data from one logical channel on the RUL carrier and to transmit data from another logical channel on the SUL carrier in accordance with the allocations.

Abstract: A wireless transmit/receive unit (WTRU) is configured to perform a 2-step random access channel (RACH) procedure. The WTRU is configured to select a random access preamble having a preamble index. The WTRU is configured to determine a scrambling sequence for a physical uplink shared channel (PUSCH) transmission. The scrambling sequence for the PUSCH transmission is initialized as a function of a random access-radio network temporary identifier (RA-RNTI) and the preamble index. The RA-RNTI is based on a symbol, a slot, a frequency, and a carrier identifier (ID). The WTRU is configured to send a message to a network node. The message comprises the selected random access preamble and the PUSCH transmission. The PUSCH transmission is scrambled with the determined scrambling sequence that is based on the RA-RNTI and the preamble index.

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: Methods, apparatus and systems for enabling interference avoidance, for example from self and neighboring interference are disclosed. In one representative method implemented in a Wireless Transmit/Receive Unit (WTRU) using time-frequency (TF) resources in first and second directions, the method includes comprising TF resource muting or symbol muting, by the WTRU, one or more TF resources for communication in the first direction based on information associated with a communication in the second direction or subframe shortening, by the WTRU, by one or more TF resources for communication in the first direction based on information associated with a communication in the second direction.

Abstract: A receiver bandwidth adaptation for radio access technologies (RATs) may be for a New Radio (NR) or 5G flexible RAT. A WTRU control channel (e.g., receiver) bandwidth may change, for example, based on monitoring a downlink channel for an indication using a bandwidth (BW) associated with a first BW configuration. The indication may include a signal to change the receiver BW. The WTRU may change the receiver BW associated with the first BW configuration to a second BW configuration when the WTRU receives the indication on a downlink (DL) channel. The WTRU may perform one or more measurements associated with the second BW configuration in response to the change of the receiver BW to the second BW configuration. The WTRU may transmit measurement information to a network entity. The WTRU may receive a DL transmission from the network using the second BW configuration.

Abstract: A wireless transmit/receive unit (WTRU) may receive first measurement indication information indicating an activation of measurement reporting. The WTRU may determine a first set of resource elements (REs) based on the first measurement indication information. Further, the first set of REs may be associated with measurement-related time and frequency resources. Also, the WTRU may receive one or more measurement-related signals in the indicated first set of REs. Additionally, the WTRU may perform a measurement of each measurement-related signal. The WTRU may transmit, based on the first measurement indication information, a measurement report based on the measurement of each measurement-related signal. Further, the WTRU may receive second measurement indication information indicating a deactivation of measurement reporting.

Abstract: Devices and techniques for determining a transmission time interval (TTI) duration and/or varying the TTI duration are contemplated. The TTI duration may be varied based on one or more of: the timing a transmission, the amount of data available for transmission, or the type of data to be transmitted. The TTI duration may be for one or more of: the Enhanced Physical Downlink Control Channel (EPDCCH), the Physical Downlink Shared Channel (PDSCH), and/or the Physical Uplink Control Channel (PUCCH). One or more different TTI durations may be achieved by modifying OFDM symbols per TTI and/or symbol duration (e.g., subcarrier spacing). One or more variable time-slot boundaries are contemplated. TTI duration per set of subcarriers is contemplated. One or more timing rules to deal with different processing time(s) are contemplated.

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: Systems and methods described herein are provided for beamforming and uplink control and data transmission techniques. Such techniques enable a UE to maintain at least one beam process for operation with multiple beams and/or points. A beam process may be indicated for transmission or reception over a downlink or uplink physical channel. Power, timing, and channel state information may be specific to a beam process. A beam process may be established as part of a random access procedure in which resources may be provisioned in random access response messages. Techniques are provided to handle beam process failures, to use beam processes for mobility, and to select beams using open-loop and closed-loop selection procedures.

Abstract: Method and apparatuses for communication over an unlicensed band are provided herein. A method may comprise transmitting transport blocks in each slot of a plurality of slots and determining a Hybrid Automatic Repeat Request (HARQ) status for each of the transmitted transport blocks. The method may further comprise determining a weighting coefficient for each of the determined HARQ statuses and calculating, based on the determined HARQ statuses and weighting coefficients, a weighted average of the HARQ statuses for the transmitted transport blocks. The method may further comprise adjusting a Listen-Before-Talk (LBT) contention window size based on the calculated weighted average of the HARQ statuses.

Abstract: A method implemented by a Wireless Transmit/Receive Unit (WTRU) includes receiving a DeModulation Interference Measurement (DM-IM) resource, determining an interference measurement based on the DM-IM resource, and demodulating a received signal based on the interference measurement. An interference is suppressed based on the interference measurement. At least one DM-IM resource is located in a Physical Resource Block (PRB). The DM-IM resource is located in a PRB allocated for the WTRU. The DM-IM resource is a plurality of DM-IM resources which form a DM-IM pattern, and the DM-IM pattern is located on a Physical Downlink Shared Channel (PDSCH) and/or an enhanced Physical Downlink Shared Channel (E-PDSCH) of at least one Long Term Evolution (LTE) subframe. The DM-IM resources are different for different Physical Resource Blocks (PRB) in the LTE subframe. The DM-IM is located in a Long Term Evolution (LTE) Resource Block (RB), and the DM-IM pattern is adjusted.

Abstract: Method and apparatuses for communication over an unlicensed band are provided herein. A method may comprise transmitting transport blocks in each slot of a plurality of slots and determining a Hybrid Automatic Repeat Request (HARQ) status for each of the transmitted transport blocks. The method may further comprise determining a weighting coefficient for each of the determined HARQ statuses and calculating, based on the determined HARQ statuses and weighting coefficients, a weighted average of the HARQ statuses for the transmitted transport blocks. The method may further comprise adjusting a Listen-Before-Talk (LBT) contention window size based on the calculated weighted average of the HARQ statuses.

Abstract: Methods, apparatus and systems for enabling interference avoidance, for example from self and neighboring interference are disclosed. In one representative method implemented in a Wireless Transmit/Receive Unit (WTRU) using time-frequency (TF) resources in first and second directions, the method includes comprising TF resource muting or symbol muting, by the WTRU, one or more TF resources for communication in the first direction based on information associated with a communication in the second direction or subframe shortening, by the WTRU, by one or more TF resources for communication in the first direction based on information associated with a communication in the second direction.

Abstract: A wireless transmit/receive unit (WTRU) may perform a listen before talk (LBT) procedure associated with a sidelink (SL) bandwidth. The SL bandwidth may include a resource block (RB) set. The WTRU may determine a CSLF associated with the RB set of the SL bandwidth based on the LBT procedure. The WTRU may determine a resource for reporting the CSLF, for example, based on a priority rule. The priority rule may indicate that a licensed resource has a higher priority than an unlicensed resource. The priority rule may indicate that, if a consistent LBT failure is not detected on an unlicensed uplink (UL) resource, the unlicensed UL resource has a higher priority than an unlicensed SL resource. The WTRU may send a medium access control (MAC) control element (CE) using the determined resource. In examples, the MAC CE may indicate the RB set.

Abstract: Techniques for efficient downlink control with a large number of carriers and/or TTis are described. Techniques for blind decoding reduction may include making the search space and/or aggregation level of candidates for a first PDCCH/E-PDCCH associated with the characteristics of a second received PDCCH/E-PDCCH. Techniques may include embedding DCI for a set of serving cells and/or TTis in a PDSCH. DCI for a set of serving cells and/or TTis may be included in single PDCCH/E-PDCCH. To reduce overhead, carrier indicator field interpretation may be associated with the serving cell or TTI from which the PDCCH/E-PDCCH containing the downlink control information is received, or the group of cells or TTis to which the PDCCH/E-PDCCH containing the downlink control information belongs.

Abstract: Channel access in unlicensed spectrum may be a function of the type of physical channel and/or a procedure that initiated a transmission. An LBT procedure may be performed as a function of beam management. A WTRU may access a channel using multiple channel access methods associated with multiple uplink transmissions based on a determination of persistent interference associated with the channel. Channel access methods may be performed with different parameters or characteristics based on the resource type/timing of the transmission/measurements of DL/UL RS. Channel access methods may be characterized by a sensing duration, an ED threshold, a beam width, and/or a beam direction. Different ED thresholds may be applied as a function of one or more characteristics of an applicable beam. Multiple sensing methods and/or related parameters may be applied as a function of the type of physical channel and/or the type of procedure associated with a transmission.

Abstract: Method, apparatus, and systems are disclosed. In one representative embodiment, a method may be implemented by a wireless transmit/receive unit (WTRU) using a channel. The method may include receiving, by the WTRU in a downlink message, a channel transmission trigger (CTT) and selecting, by the WTRU, a type of a Listen Before Talk (LBT) configuration to be performed based on the received CTT. The method may further include determining, by the WTRU in accordance with the type of LBT configuration selected, whether the channel is available for transmission and transmitting data or control information on the channel, on condition that the channel is available for transmission.