Abstract: Systems, methods and instrumentalities are disclosed for decoding data. For example, it may be determined, in a current slot, whether data received in a previous slot is decoded successfully. The data received in the previous slot may be included in a Physical Downlink Shared Channel (PDSCH). If the data received in the previous slot is not decoded successfully, preemptive multiplexing information may be detected in a first search space. The data received in the previous slot may be decoded, for example, using detected preemptive multiplexing information. The preemptive multiplexing information may be of a current slot. The preemptive multiplexing information may be comprised in a first DCI. A second search space of the current slot may be searched. For example, the second search space may be searched for a second DCI. The first DCI and the second DCI may be different.

Abstract: Methods, systems, and devices may assist in reducing signaling load that occur based on paging and handover. Methods, systems, and devices may be based on UE states, a radio access network registration area (RRA) or tracking/paging area with different architectural approaches (e.g., hierarchical or distributed), dynamic RRA management, radio access network based paging, and radio access network based user equipment (UE) mobility management.

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: Methods and apparatus for protection of multi-user (MU) transmission are described herein. An apparatus includes a receiver, a transmitter and a processor. The receiver and the processor detect a trigger frame for an uplink (UL) multi-user (MU) transmission. The processor and the transmitter generate and send a frame in response to the trigger frame and transmit channel availability information for a plurality of channels in response to the trigger frame. The receiver and the processor detect data in a resource unit (RU) of a downlink (DL) MU physical layer (PHY) protocol data unit (PPDU) on one of the plurality of channels. The one of the plurality of channels is based on the transmitted channel availability information.

Abstract: A wireless transmit/receive unit (WTRU) may receive a downlink communication from a network over a first interface transmitted to one or more WTRUs in a group of WTRUs. The WTRU may determine an access class of the WTRU based on a packet loss percentage of the downlink communication. The access class may be associated with a contention window for accessing a second interface. The WTRU may transmit packet loss information to the one or more WTRUs over the second interface in the contention window. The WTRU may receive packet loss feedback from the one or more WTRUs over the second interface. The WTRU may determine that the access class of the WTRU is a highest class of the one or more WTRUs. The WTRU may transmit a single groupcast negative acknowledgement (gNACK) to the network on behalf of the one or more WTRUs over the first interface.

Abstract: Methods, apparatus, systems and procedures to manage a multicast communication to a multicast group implemented by a respective wireless transmit/receive unit (WTRU) of WTRUs in the multicast group are disclosed. One representative method includes receiving, by the respective WTRU of the multicast group, a configuration, the configuration indicating a Random Access Channel (RACH) preamble to use for a negative acknowledgement (NACK) response to a multicast transmission to the respective WTRU, monitoring, by the respective WTRU, for data of the multicast transmission, determining, by the respective WTRU, whether the monitored for data was successfully received; and on condition that the monitored for data was not successfully received, sending, by the respective WTRU, the RACH preamble indicated by the received configuration.

Abstract: A method of scheduling wireless data transmissions between a mobile terminal (701) and a base station using multiple component carrier signals is disclosed. The method comprises the steps of: receiving in the mobile terminal information from the base station indicating available component carriers; detecting in the mobile terminal at least one dynamic parameter indicative of the mobile terminal's current ability to handle component carriers having non-contiguous bandwidths; determining in the mobile terminal in dependence of the at least one dynamic parameter which of the available component carriers to utilize; and transmitting from the mobile terminal to the base station information indicating the component carriers determined to utilize.

Abstract: Methods, apparatus, systems, architectures and interfaces for compressing hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback bits performed by a wireless transmit/receive unit (WTRU) receiving a transmit block (TB) including code block group (CBG) data are provided. The method includes receiving, by the WTRU, information associated with transmitting compressed HARQ-ACK feedback information, receiving, by the WTRU, a TB; determining, by the WTRU, a countdown downlink assignment index (CD_DAI) associated with the received TB; generating, by the WTRU, the compressed HARQ-ACK feedback information by compressing HARQ-ACK feedback bits associated with the received TB; and on condition that: (1) the CD_DAI is equal to zero or (2) the WTRU determines to provide feedback information, transmitting the compressed HARQ-ACK feedback information.

Abstract: Methods and apparatuses for operating in multi-access point (AP) wireless networks are described herein. A method performed by an AP may include transmitting, using a set of resources, a multi-AP ready-to-send (RTS) frame to at least one other AP and a plurality of stations (STAs). The method may include transmitting another frame using a portion of the set of resources. The method may include receiving, using the portion of the set of resources, a clear-to-send (CTS) frame from at least one STA of the plurality of STAs in response to the another frame. The method may include transmitting, using the portion of the set of resources, a data frame to the at least one STA. The multi-AP RTS frame may include resource allocation information for the at least one other AP and the plurality of STAs.

Abstract: Systems and methods are disclosed for determining a first downlink control indicator (DCI) and a second DCI, determining a set of active aperiodic channel state information reference signals (A-CSI-RSs) based on the first DCI, and determining a subset of the set of active A-CSI-RSs based on the second DCI. A WTRU may perform resource element (RE) muting based on a set of active A-CSI-RSs. A WTRU may perform channel state information (CSI) measurement based on a subset of a set of active A-CSI-RSs.

Abstract: A wireless transmit/receive unit (WTRU) may receive a first downlink control information (DCI) in a first slot. The first DCI may include an indication of a first quasi co-location (QCL) reference. The WTRU may receive a second DCI in a second slot. The second DCI may include scheduling information for a first physical downlink shared channel (PDSCH) transmission. The WTRU may receive the first PDSCH transmission in accordance with the first QCL reference indicated by the first DCI received in the first slot and in accordance with the scheduling information for the first PDSCH transmission included in the second DCI received in the second slot.

Abstract: A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating radar interference with transmission and reception of RACH preambles. According to a first aspect, one or more first RACH preambles are transmitted based on a first RACH configuration. The WTRU may receive an RAR with an indication that the first RACH configuration is unavailable. The WTRU may then retrieve a second RACH configuration information. The WTRU may then transmit one or more second RACH preambles based on the second RACH configuration and then completes a random access procedure based on the second RACH configuration.

Abstract: An access point (AP) that supports the IEEE 802.11ba protocol may transmit a frame including a physical layer (PHY) preamble to one or more stations (STAs) over a channel. The PHY preamble may include a plurality of repeated modulated legacy signal (L-SIG) fields to spoof a recipient of the frame and protect a wake up signal (WUS) to be subsequently transmitted by the AP. The AP may transmit the WUS to at least a first STA of the one or more STAs, wherein the at least the first STA is a IEEE 802.11ba compliant STA.

Abstract: Methods and systems for transmitting uplink control information and feedback are disclosed for carrier aggregation systems. A user equipment device may be configured to transmit uplink control information and other feedback for several downlink component carriers using one or more uplink component carriers. The user equipment device may be configured to transmit such data using a physical uplink control channel rather than a physical uplink shared channel. The user equipment device may be configured to determine the uplink control information and feedback data that is to be transmitted, the physical uplink control channel resources to be used to transmit the uplink control information and feedback data, and how the uplink control information and feedback data may be transmitted over the physical uplink control channel.

Abstract: Physical layer processing and procedures for device-to-device (D2D) discovery signal generation and transmission and scheduling of D2D discovery signals are described. Detection and measurement of a D2D discovery signal, D2D signal identity management, and monitoring by a wireless transmit/receive unit (WTRU) of PDCCH for D2D discovery scheduling is described, as is a WTRU that may be configured with a D2D-specific transmission/reception opportunity pattern. The discovery signal may carry a payload for explicit information about user and/or service identity, and may be mapped to physical resources in such a way as to decouple transmission/reception of the discovery signal from downlink operations. A WTRU may measure a D2D discovery signal quality and report to the network.

Abstract: Techniques may be used for restricted direct discovery in proximity services (ProSe). A ProSe function may receive from a discovery wireless transmit/receive unit (WTRU) a restricted ProSe Application identity (ID) of an application located at the discoverer WTRU requesting ProSe discovery. The ProSe function may derive a first and second ProSe codes for the discoveree WTRU and discoverer WTRU, and provide the ProSe codes to the discoverer and/or discoveree WTRUs. A ProSe application server may receive a revocation message from an announcing WTRU indicating a revoked WTRU. The ProSe application server may provide a ProSe discovery WTRU ID for the revoked WTRU to a ProSe Function. The ProSe function may instruct the announcing WTRU to stop announcing a ProSe code known by the revoked WTRU, and may provide a new ProSe code to at least one WTRU authorized to discover the announcing WTRU.

Abstract: Interference for reference symbols in URLLC/eMBB multiplexing may be reduced. URLLC and/or eMBB reference signal (RS) interference may be reduced regardless whether the URLLC and eMBB reference signals and data are multiplexed and superimposed using the same numerology or different numerologies and/or regardless whether the URLLC and eMBB reference signals may be aligned or misaligned (e.g., may or may not use a common resource). An URLLC transmission may preempt an eMBB transmission. For the URLLC and eMBB transmissions using a same numerology, a RS reuse indication may be used. The RS reuse indication may indicate whether a RS in the preempted portion of the eMBB transmission may be reused. A channel estimation function set may be estimated, and channel estimation may be performed using the determined channel estimation function set. The eMBB transmission and the URLLC transmission may be decoded based on the performed channel estimation.

Abstract: A system and methods for beam failure recovery and management for multi-carrier communications with beamforming are disclosed herein. A wireless transmit/receive unit (WTRU) may monitor for and detect a beam failure of a beam associated with a secondary cell (Scell). The WTRU may select an Scell candidate beam. The WTRU may transmit using a selected uplink (UL) resource in a primary cell (SpCell) a medium access control (MAC) control element (CE) including an indication of Scell beam failure and identifying the selected candidate beam. The WTRU may receive an Scell beam failure indication response on the SpCell indicating an SCell index and a downlink (DL) quasi co-location (QCL) reference associated with the Scell. The WTRU may verify that the DL QCL reference matches with the candidate beam. The WTRU may perform random access on the SCell using the selected QCL reference and the selected candidate beam.

Abstract: Methods, apparatus and systems for managing a connection state of a Wireless Transmit/Receive Unit (WTRU) that is in Mobile Initiated Communication Only (MICO) mode are disclosed. One representative method may include the WTRU obtaining information indicating that the WTRU is to initiate registration prior to sending a Service Request (SR). The representative method may further include the WTRU sending a registration request in accordance with the obtained information and sending a SR after registering with a Network Entity.

Abstract: The system and method detect at least one cell defining SSB (CD-SSB), extract information associated with at least one other CD-SSB, the information including at least the absoluteFrequencyotherSSBs for the at least one other CD-SSB, extract an absoluteFrequencySSB from a network, determine if absoluteFequencySSB is in a list of absoluteFrequencyotherSSBs and if so, the CD-SSB indicated by the absoluteFrequencySSB, read the SIB1 associated with the CD-SSB indicated by the absoluteFrequencySSB and perform random access using RACH resources corresponding to the read SIB1. The system and method may further include if the absoluteFrequencySSB is determined to not be in the list of absoluteFrequencyotherSSBs, read at least one SIB1 associated with at least one other CD-SSB indicated by an absoluteFrequencyotherSSB in the list of absoluteFrequencyotherSSBs and perform random access using RACH resources corresponding to the read at least one SIB1.