Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive first control signaling indicating a configuration associated with a target network node in a non-terrestrial network. The configuration may include a first UE-group configuration and a UE-specific configuration including integrity information for the first UE-group configuration. The UE may perform a connection operation based on a trust status of the first UE-group configuration.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may support mobility between a non-terrestrial network (NTN) cell and a terrestrial network (TN) cell. If the UE is connected to an NTN cell, the UE may determine timing for a neighboring TN cell using a reference timestamp. A first network entity supporting the NTN cell may request the reference timestamp from a second network entity supporting the TN cell. The second network entity may output the timestamp in response to the request. The first network entity may obtain the timestamp and output an indication of the timestamp to the UE in a measurement gap configuration. The UE may use the reference timestamp to determine timing for a measurement gap and may monitor for a signal (e.g., a synchronization signal) from the second network entity supporting the TN cell during the measurement gap.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, flight path information that indicates a planned flight path of the UE. The UE may receive, from the network node, timing advance compensation configuration information associated with the planned flight path of the UE and an indication of at least one application criterion associated with the timing advance compensation configuration information. The UE may transmit, to the network node, an uplink communication using a timing advance based at least in part on the timing advance compensation configuration information, in connection with a determination that the at least one application criterion is satisfied. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a non-terrestrial network (NTN) entity, a message that is associated with an uplink grant. The UE may select, based at least in part on the message, either a cell-specific offset or an updated offset that is indicated after initial access, as a timing offset that accounts for a propagation delay between a base station of the NTN and the UE. The UE may transmit, to the NTN entity, an uplink communication using the timing offset. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a time-domain resource for an uplink transmission. The UE may determine a time period, during which the UE is to refrain from monitoring for downlink communications, based at least in part on the time-domain resource for the uplink transmission and at least one of a first time offset associated with a difference in starting time between an uplink radio frame and a corresponding downlink radio frame at the UE, a second time offset associated with an uplink-downlink timing interaction for the UE, or a network-indicated offset. Numerous other aspects are provided.

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: A video encoding device (e.g., a wireless transmit/receive unit (WTRU)) may transmit an encoded frame with a frame sequence number using a transmission protocol. The video encoding device, an application on the video encoding device, and/or a protocol layer on the encoding device may detect a packet loss by receiving an error notification. The packet loss may be detected at the MAC layer. The packet loss may be signaled using spoofed packets, such as a spoofed NAM packet, a spoofed XR packet, or a spoofed ACK packet. A lost packet may be retransmitted at the MAC layer (e.g., by the encoding device or another device on the wireless path). Packet loss detection may be performed in uplink operations and/or downlink operations, and/or may be performed in video gaining applications via the cloud. The video encoding device may generate and send a second encoded frame based on the error notification.

Abstract: An example device for exchanging media data includes a memory configured to store media data; and one or more processors implemented in circuitry and configured to: execute a media session handler (MSH) to interact with one or more application functions provided by an application provider device, the one or more application functions including one or more of a support application function, a configuration application function, a provisioning application function, a channel application function, a signaling server application function, an interoperability application function, a Session Traversal Utilities for Network Address Translation (STUN) application function, or a Traversal Using Relay around NAT (TURN) application function; receive a web application from the application provider device; and exchange media data between the one or more application functions provided by the application provider device, the MSH, and the web application.

Abstract: Certain aspects of the present disclosure provide techniques for wireless communications by a user equipment (UE) generally including receiving signaling indicating one or more values for a scheduling offset between a downlink slot where downlink control information (DCI) is received and an uplink slot for transmitting a physical uplink shared channel (PUSCH) scheduled by the DCI; determining an additional offset to be used in conjunction with the scheduling offset values to determine PUSCH transmission timing; determining a power control adjustment for a sounding reference signal (SRS) transmission based on transmission power control (TPC) commands received in a time interval determined by one of the scheduling offset values and the additional offset; and transmitting SRS in an SRS transmission occasion, in accordance with the determined power control adjustment.

Abstract: Methods, systems, and devices for wireless communications are described. The method may include a first network node (e.g., a user equipment (UE)) receiving first control information indicative of a first feedback scheme for multicast transmissions in a non-terrestrial network (NTN) and determining an applied feedback scheme based on the first feedback scheme. The method may also include the first network node monitoring for a multicast transmission and operating in accordance with the applied feedback scheme.

Abstract: A method of wireless communication by a user equipment (UE) calculates a propagation delay for sending a message from the UE to a network node, such as a base station, via non-terrestrial communications. The method sends a random access preamble to the base station while accounting for the calculated propagation delay. The method starts a random access response (RAR) window at a first physical downlink control channel (PDCCH) occasion after twice the calculated propagation delay from sending the random access preamble. The method receives a random access response (RAR) message from the base station during the RAR window. The RAR message includes an uplink grant indicating an uplink shared channel resource. Further, the method sends an uplink message to arrive during the uplink shared channel resource while accounting for the calculated propagation delay.

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: The apparatus wireless communication may include a UE. The UE may receive a DL communication triggering a UL communication starting in a first UL slot/subframe from an NTN BS over at least one DL slot/subframe ending in a first DL slot/subframe. The UE may monitor for DL communications from the NTN BS in at least a subset of DL slots/subframes between the first DL slot/subframe and a second DL slot/subframe that is time-aligned with the first UL slot/subframe. The DL communication may trigger a second DL communication starting at a third DL slot/subframe and ending at a fourth DL slot/subframe, and the UL communication is based at least in part on receiving the second DL communication, and the UE may monitor the at least the subset of slots/subframes between the fourth DL slot/subframe and the second DL slot/subframe.

Abstract: Methods, systems, and devices for wireless communications are described. Described techniques provide for mitigating error in time or frequency adjustments for preambles of a random access procedure. A user equipment may use one value for the adjustment when transmitting data to a non-terrestrial network, but then transmit the preamble of a random access procedure according to a preamble-specific time or frequency adjustment based on one or more indications received from the network (e.g., rather than resetting the adjustment to “0”). By using some signaled value for the preamble-specific timing or frequency adjustment rather than resetting the adjustment to “0,” preamble reception performance may be maintained or improved with as many or fewer position measurements for the UE or non-terrestrial network entity.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, based at least in part on a measurement gap configuration, a set of available slots for an uplink repetition configuration. The UE may transmit, using at least one slot of the set of available slots, at least one uplink repetition associated with the uplink repetition configuration. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a differential UE-specific timing advance (TA) based at least in part on a difference between a first UE-specific TA associated with a current global navigation satellite system (GNSS) position fix and a second UE-specific TA associated with a previous GNSS position fix. The UE may transmit, to a non-terrestrial network (NTN) node, an uplink message at a time that is based at least in part on the differential UE-specific TA. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, an indication of a scheduling offset associated with a hybrid automatic repeat request (HARQ) acknowledgement (ACK) codebook. The UE may transmit, to the network entity, the HARQ ACK codebook based at least in part on the scheduling offset. Numerous other aspects are described.

Abstract: A user equipment (UE) transmits a first message spanning a set of physical resource blocks (PRBs). The UE retransmits a first portion of the first message associated with a first subset of one or more PRBs in the set of PRBs, the set of PRBs grouped into a set of PRB bundles including a first subset of PRB bundles corresponding to the first subset of the one or more PRBs and skips retransmission of a second portion of the first message associated with a second subset of the PRB bundles of the set of PRB bundles, the second subset of the PRB bundles corresponding to at least a portion of remaining PRBs in the set of PRBs.

Abstract: Systems and techniques are provided for wireless communications. For example, an apparatus (e.g., a user equipment (UE)) may receive a downlink transmission in a first downlink time slot and receiving an update to a scheduling offset associated with a propagation time delay of communications between the apparatus and a network entity. The update indicates an updated scheduling offset. The apparatus may determine a selected scheduling offset as one of the scheduling offset or the updated scheduling offset. The apparatus may transmit, using a second uplink time slot, an uplink transmission associated with the downlink transmission. The second uplink time slot may be determined based on a first uplink time slot and the selected scheduling offset.

Abstract: Methods, systems, and devices for wireless communications are described in which UEs may communicate with satellites and base stations or gateways in a non-terrestrial network (NTN). Due to the large distances between transmitting devices and receiving devices in a NTN, timing adjustments to account for propagation delay communications links via a satellite may include a propagation delay between a UE and a satellite, a propagation delay between a base station and a satellite, as well as a variation in the propagation delays due to movement of the satellite. In accordance with various techniques discussed herein, a UE may account for variation in propagation delay, in addition to determined propagation delay, when determining an uplink timing for uplink communications via a satellite.