Abstract: Methods, systems, and devices for wireless communications are described in which a user equipment (UE) of a group of UEs may communicate with other members of the group to provide data or other information via sidelinks. The UE may transmit a groupcast sidelink request to the base station. After receiving the sidelink request, the base station may send a sidelink grant (e.g., transmit or receive grant) in downlink control information (DCI) to the UEs in the sidelink groupcast communications group. The sidelink grant may include information for each hop such as which UEs are going to transmit or receive, the reception or transmission beams of the UEs, time and frequency resources, or the data to forward or relay. In some examples, a UE may relay information to other UEs in the sidelink groupcast communications group.

Abstract: Methods, systems, and devices for wireless communications are described in which a first user equipment (UE) may transmit sidelink communications to a second UE, and the second UE may provide feedback associated with the sidelink communication to the first UE in a sidelink control information (SCI) transmission. In some cases, the SCI is first stage SCI transmitted in a sidelink control channel or second stage SCI transmitted in a sidelink shared channel. The feedback may include one or more of acknowledgment/negative-acknowledgment feedback, channel state information feedback, a scheduling request, or any combinations thereof. In some cases, the first UE may indicate resources of the second slot to the second UE for transmission of the feedback in the SCI, such as by providing a time offset value and resource index that identifies the resources.

Abstract: Apparatus, methods, and computer-readable media for facilitating phase jump estimation for SL DMRS bundling are disclosed herein. An example method includes receiving, from another device, first information at a first symbol of a first slot, the first slot including at least the first symbol and a first reference signal. The example method also includes receiving second information at a second symbol of a second slot, the second slot including at least the second symbol and a second reference signal, the first information and the second information being repetitions. The example method also includes generating a first reference signal copy based at least on the second reference signal and a phase jump between the first slot and the second slot. Additionally, the example method includes performing channel estimation across the first slot and the second slot based on an aggregation of the first reference signal and the first reference signal copy.

Abstract: Beam management enhancements for advanced millimeter wave (mmWave) operations are disclosed. As a part of channel state information (CSI) reporting configuration, a user equipment may include an interference plus noise measurement of beams for consideration in beam management. The UE measures a set of signaling resources of each beam for power contribution and interference plus noise. According to the particular configuration, the UE may rank all of the available beams into a subset of the highest ranked beams, ranked either by the interference plus noise measurement, by the power contribution metric, or by a combination of both. The UE reports an identification of the subset to the serving base station which determines the beam to use for subsequent communications with the UE.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may identify a first set of resources for an access link communication between the first UE and a base station. The UE may identify a second set of resources for a sidelink communication between the first UE and a second UE. The UE may identify a scheduling conflict between the first set of resources for the access link communication and the second set of resources for the sidelink communication. The UE may drop at least a portion of the first set of resources for the access link communication or the second set of resources for the sidelink communication based at least in part on the identification of the scheduling conflict and a prioritization rule. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may determine whether to transmit a sidelink timing synchronization signal to a second UE based at least in part on a sidelink zone in which the first UE is located and a sidelink zone in which the second UE is located. The first UE may selectively transmit the sidelink timing synchronization signal to the second UE based at least in part on determining whether to transmit the sidelink timing synchronization signal to the second UE. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a source UE, a first sidelink communication. The UE may generate a transmit power control command based at least in part on a signal to interference noise ratio measurement associated with the first sidelink communication. The UE may transmit, to control a transmit power for a second sidelink communication, the transmit power control command to the source UE. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a channel state information (CSI) reporting configuration for a CSI report, wherein the CSI reporting configuration indicates that the CSI report is to include a layer 1 signal to interference plus noise ratio (L1-SINR). The UE may determine a number of CSI processing units (CPUs) occupied for processing of the CSI report that is to include the L1-SINR. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for determining shared resources associated with one or more user equipments (UEs) for sidelink communications, including control resources and data resources. A first UE may determine a first set of control resources in a first frequency band corresponding to a first group of UEs including the first UE. The first UE may transmit a sidelink request to reserve a subset of data resources to a second UE in the first group of UEs. The first UE may monitor for one or more sidelink responses indicating a positive sidelink response to the sidelink request, a negative sidelink response to the sidelink request, or both. The first UE may determine, based on monitoring for the one or more sidelink responses, whether to transmit a sidelink confirmation indicating a reservation of the data resources to the second UE.

Abstract: Aspects relate to mechanisms for a wireless communication device to configure and indicate one or more beams for sidelink communication with another wireless communication device. The sidelink communication can include first stage sidelink control information (SCI) and second stage SCI that may be communicated on a first beam configured on the wireless communication devices. The sidelink communication can further include sidelink data traffic that may be communication on a second beam. The second beam may be the first beam or a different beam based on at least one of a beam capability of at least the first wireless communication device or a gap between the sidelink data traffic and at least one of the first stage SCI or the second stage SCI.

Abstract: Apparatus, methods, and computer-readable media for facilitating techniques for phase continuity of sidelink DMRS bundling are disclosed herein. An example method for wireless communication at a first UE includes receiving a first sidelink transmission including at least a first DMRS. The example method also includes receiving a second sidelink transmission, the first sidelink transmission and the second sidelink transmission together including at least the first DMRS and a second DMRS. The example method also includes receiving, from a second UE, an indication of a bundling relationship between the first sidelink transmission and the second sidelink transmission, the bundling relationship including at least one of strong bundling, weak bundling, or no bundling. The example method also includes performing channel estimation for a channel associated with the first sidelink transmission and the second sidelink transmission based at least in part on the bundling relationship.

Abstract: Apparatus, methods, and computer-readable media for facilitating a soft in-coverage/out-of-coverage indication for sidelink communications are disclosed herein. An example method for wireless communication at a wireless device includes determining a coverage state with reference to a cell for a timing reference. In some examples, the coverage state may be determined from among a set of states including an in-coverage state, an out-of-coverage state, and at least one additional coverage state. The example method also includes broadcasting a state indicator based on the coverage state determined by the wireless device.

Abstract: To schedule panel specific uplink transmissions, the UE may assist in the scheduling of the panel specific uplink transmission by improving the manner in which the specific panel is indicated for uplink transmission. The apparatus receives, from a base station, an indication of a UE panel for an uplink transmission. The apparatus determines a Tx panel at the UE based on the indication of the UE panel. The apparatus transmits, to the base station, the uplink transmission using the Tx beam associated with the Tx panel.

Abstract: Methods, systems, and devices for wireless communications are described that allow for a first user equipment (UE) to forward a transmission from a second UE to a base station. The forwarding techniques may include the first UE performing a decoding procedure on a message received from the second UE via a sidelink communications link. Based on the results of the decoding procedure, the first UE may select an amplify and forward (AF), decode and forward (DF), or a combination thereof to forward the message from the second UE to the base station. The base station may receive the forward messages and, in some cases, a message directly from the second UE, and may determine decoding weights to use to jointly decode the two messages received at the base station.

Abstract: Wireless communications systems and methods related to communicating control information are provided. A method of wireless communication performed by a user equipment (UE) may include mapping a power reservation signal of a sub-slot resource pool (RP) to an AGC symbol location of a slot RP and transmitting, to at least one other UE, the power reservation signal, wherein a transmit power level of the power reservation signal is based on an estimated transmit power level associated with at least one sub-slot.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit information indicating a set of resources associated with periodic sidelink monitoring, the information indicating at least one first period of time during which the UE will remain awake and monitor for signals and at least one second period of time during which the UE will be in a sleep mode and not monitoring for signals. The UE may monitor for signals using at least one resource indicated by the information and during the at least one first period of time. Numerous other aspects are described.

Abstract: A method for wireless communication performed by a user equipment (UE) includes receiving a reference signal (RS) configuration from a first base station. The RS configuration indicates an RS identifier (ID) of an RS associated with a second base station. The method also includes receiving the RS from the second base station based on receiving the RS configuration. The method further includes transmitting, to the first base station, an interference measurement report associated with receiving the RS from the second base station. The interference measurement report indicates the RS ID associated with the RS from the second base station.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first node may transmit, to a second node on a beamformed link from the first node to the second node, a first signal, wherein the first node and the second node are associated with common timing; determine whether a second signal, based at least in part on the first signal, is received on a beamformed link from the second node to the first node; and transmit a third signal based at least in part on receiving the second signal or perform a sidelink beam failure recovery procedure based at least in part on determining that the second signal is not received. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may transmit, to a second UE, a first request message indicating a request to transmit a first sidelink message in a first slot of a sidelink network, and may transmit the first sidelink message in a first data section of the first slot based on transmitting the first request message. The first UE may monitor a first portion of a control section of a second slot of the sidelink network for request messages or response messages. The first UE may transmit a second request message in a portion of the second control section of the second slot designated for scheduling ongoing transmissions, and may transmit a second sidelink message in at least one portion of the second slot based on transmitting the second request message.

Abstract: Aspects provide a mechanism for activating a secondary serving cell (SCell) in a wireless communication network supporting a multi-cell transmission environment. In some examples, a scheduled entity (e.g., a UE) in a connected mode with a primary serving cell (PCell) may synchronize with the SCell to activate the SCell for multi-cell communication with the PCell and the SCell. To enable synchronization with the SCell, the PCell may trigger communication and processing of one or more reference signals between the scheduled entity and the SCell.