Abstract: Communication beam selection and management in a communication system is disclosed in which a first, or initiating, user equipment (UE), and a second, or target, UE, establish a direct communication link between them. The initiating UE may transmit a request to a serving base station, which may then communicate with a serving base station of the target UE to schedule one or more communication beams, and/or time and frequency resources, that the initiating UE and the target UE may use to perform direct beam search.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may communicate with another UE over a sidelink according to an inter-band carrier aggregation configuration. The inter-band carrier aggregation configuration may include one or more component carriers associated with a first frequency band and one or more component carriers associated with a second frequency band. The UE may perform beam failure detection for a first beam associated with the first frequency band and/or a second beam associated with the second frequency band based at least in part on independent beam failure detection reference signals that are configured for the first frequency band and the second frequency band. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may receive at least one announcement from at least one additional wireless communication device. The wireless communication device may communicate with an anchor device using a selected set of resources, wherein the selected set of resources is based at least in part on the at least one announcement. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide methods and apparatus for selecting numerology for sidelink synchronization signals. When one or more user equipment (UE) are in various modes of network signaling with a base station (BS), a first UE may determine a mode of network signaling between the first UE and the BS. The UE may then determine a first numerology based on the mode, and receive, from a second UE, a sidelink signal having a subcarrier spacing corresponding to the first numerology.

Abstract: Aspects relate to obtaining, at a first scheduled entity, a first priority ranking of first uplink (UL) data scheduled for transmission to a scheduling entity and a first data scheduled for transmission to a second scheduled data, as well as a second priority ranking of second data scheduled for transmission to a third and fourth scheduled entity, respectively. The scheduling uses at least a portion of a sidelink resource reserved for sidelink communication for the transmissions. The scheduling of the transmissions using at least the portion of the sidelink resource are based on the first priority ranking and the second priority ranking. Various transmission cancellation and reception preemptions are transmitted from transmitting scheduled entities to other transmitting or receiving scheduled entities, respectively. Such cancellations and preemptions are based on the priority rankings, prediction of data transmission collisions and prediction of interference at receiving entities.

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: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for joint source channel coding for efficiently relaying a set of bits mapped to a modulation symbol. A method that may be performed by a wireless relay node includes obtaining a set of bits to convey to a second wireless node. The method may include mapping the set of bits to a first modulation symbol of a set of modulation symbols, wherein the mapping is chosen based on an interpreted value of the set of bits. The method may include transmitting the first modulation symbol to the second wireless node.

Abstract: Methods, systems, and devices for wireless communication are described. In some systems, a first device may calculate hybrid beamforming parameters for a second device. The first device may calculate the hybrid beamforming parameters based on an estimation of channel information associated with at least a portion of a communication link at the second device via a machine learning model. Inputs to the machine learning model may include measured model parameters based on measurements performed by one or more other devices. The first device may transmit a message to the second device to indicate the hybrid beamforming parameters, which may include an input for a beam refinement process. The second device may perform the beam refinement process based on the hybrid beamforming parameters to identify one or more beams. The first and second devices may communicate using the one or more beams based on the beam refinement process.

Abstract: A first UE may calculate a CBR associated with a sidelink resource pool over a measurement window. A partially used slot-subchannel block in the plurality of slots may be associated with a non-zero contribution to the CBR. The partially used slot-subchannel block may include at least one used mini slot-subchannel block. The first UE may identify a CR limit associated with the sidelink resource pool based on the CBR. The first UE may select one or more resources associated with a slot from the sidelink resource pool for a sidelink transmission to a second UE based on the CR limit. The first UE may transmit, to the second UE, the sidelink transmission based on the selected one or more resources.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may initiate handover from one base station to another. The handover procedure may not include random access channel (RACH) transmissions, and thus may be a localized RACH-less handover. The UE may initiate handover to a new base station based on the relative location of the UE and the new base station, some predetermined time, or based on the characteristics of the signals from each base station.

Abstract: In an aspect, the present disclosure includes a method, apparatus, and computer readable medium for wireless communications for transmitting, by a user equipment (UE), a capability indication message to a network entity, the capability indication message comprising a sidelink capability for direct communication between the UE and one or more secondary UEs; receiving, at the UE, a configuration message from the network entity in response to the capability indication message, wherein the configuration message includes one or more configuration parameters based on the sidelink capability; and establishing a communication link based on the one or more configuration parameters.

Abstract: Methods, systems, and devices for wireless communications are described to enable base station and a user equipment (UE) to mitigate interference when using full-duplex communications. For example, a base station communicating with a UE via full-duplex communications may indicate for the UE to align the time of its uplink transmissions with the time the UE receives downlink transmissions. Additionally or alternatively, the base station may indicate a timing alignment window for the UE, where the window may consist of an allowed time period the UE may use to select a time to begin uplink transmissions. In some examples, the base station may select a cyclic prefix for full-duplex communications, where the cyclic prefix may be longer than a cyclic prefix used for other communications. Further, the base station may select uplink frequency and downlink frequency bands separated by a defined guard band for full-duplex communications.

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for dynamic postponement of periodic resources and DRX active times. A first UE and a second UE may receive, from a base station, an allocation of periodic resources for reception of downlink traffic and relayed downlink traffic over sidelink. The first UE and the second UE may also receive respective postponement indications for reception occasions of the periodic resources and may monitor for the downlink traffic and the relayed downlink traffic at time adjusted instances in response to the respective postponement indications. A base station may send the downlink traffic to the first UE, which may relay the downlink traffic to the second UE, at the time adjusted instances in response to the postponement indications.

Abstract: Apparatus, methods, and computer-readable media for facilitating a HARQ flush indicator for transmissions are disclosed herein. An example method for wireless communication at a first sidelink device includes transmitting a sidelink transmission of one or more CBs using code block groups, each code block group including one or more CBs of the sidelink transmission. The example method also includes receiving negative feedback for at least one CB of the sidelink transmission. Additionally, the example method includes retransmitting the at least one CB. The example method also includes transmitting an FI indicating to avoid combining a prior sidelink transmission of the at least one CB with a retransmission of the at least one CB.

Abstract: Certain aspects of the present disclosure provide compression schemes for relaying prior to decoding. A method that may be performed by a wireless relay node includes receiving, from a transmitter node, a first packet intended for a receiver node, compressing pre-decoded samples of the first packet according to a compression scheme, and transmitting, to the receiver node, a second packet including the compressed pre-decoded samples.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may generate information indicating a reference signal and a measurement report for a first sidelink between the first UE and a second UE. The first UE may use the information for a second sidelink between the first UE and the second UE. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. In some examples, a first UE may receive an indication of first resources from a second UE. In some examples, the second UE may be a UE configured to receive a transmission from a third UE over the first resources. In some such examples, the first UE may transmit, to a fourth UE, a sidelink transmission over available resources that exclude the first resources. Additionally, or alternatively, the second UE may be a UE that received sidelink control information from the third UE indicating the resources for transmission by the third UE to a fourth UE. In some such examples, the first UE may transmit, to the second UE, a sidelink transmission over available resources that exclude the first resources.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a sidelink grant scheduling a sidelink data transmission associated with one or more sidelink resources. The UE may determine a minimum time delay between the sidelink grant and the sidelink data transmission scheduled by the sidelink grant based at least in part on a value associated with a sidelink minimum-k parameter configured for the UE. Numerous other aspects are provided.

Abstract: Certain aspects of the present disclosure provide techniques for configuring sidelink slots with multiple automatic gain control symbols. One aspect provides a method for wireless communication by a user equipment, including enabling a slot configuration comprising at least two symbols configured for use by a receiver for automatic gain control in preconfigured symbol locations within a slot, and transmitting the at least two symbols while transmitting symbols within the slot.

Abstract: Certain aspects of the present disclosure provide techniques for mini-slot operation in sidelink communications. A method performed by a user equipment (UE) includes determining a mini-slot within a configured sidelink slot in which to perform sidelink transmission, and performing the sidelink transmission in the mini-slot.