Apparatuses, methods, and systems are disclosed for radio link failure recovery. One method includes determining, at a first user equipment, an occurrence of a radio link failure with a second user equipment. The method includes transmitting information indicating the radio link failure. The method includes starting a timer in response to transmitting the information indicating the radio link failure. The method includes, after starting the timer and before the timer expires, transmitting one or more messages to the second user equipment requesting feedback from the second user equipment.

The present disclosure includes a method, apparatus, and computer readable medium for wireless communications for determining, at a first node, first beam orientation information for a second node to select one or more beams for beam training with a third node, determining, at the first node, second beam orientation information for the third node to select one or more of beams for beam training with the second node, transmitting, to the second node, the first beam orientation information, and transmitting, to the third node, the second beam orientation information.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a set of frequency components to use in sidelink operation based at least in part on an inter-band carrier aggregation configuration. In some aspects, the set of frequency components includes one or more frequency components in a first frequency band and one or more frequency components in a second frequency band. The UE may communicate with another UE over a sidelink using one or more beams that are selected based at least in part on channel conditions associated with the one or more frequency components in the first frequency band and channel conditions associated with the one or more frequency components in the second frequency band. Numerous other aspects are provided.

Disclosed are techniques for wireless communication. In an aspect, a first user equipment (UE) performs a limited beam sweep of one or more transmit beams on a second frequency band in an estimated direction from the first UE to the second UE, wherein the estimated direction is based on one or more parameters received over a previously established signaling radio bearer (SRB) on a first frequency band and/or a device-to-device discovery procedure performed on the first frequency band, receives, over the SRB, a confirmation that a data radio bearer (DRB) has been established on the second frequency band with at least one transmit beam of the one or more transmit beams, and sends, to the second UE, a data flow over the DRB on the second frequency band using the at least one transmit beam.

A first UE may receive, from a base station or a second UE, one or more first TCI states via RRC signaling. The first UE may receive, from the base station or the second UE, one or more MAC-CEs. Each of the one or more MAC-CEs may include at least one indication of one or more second TCI states. The one or more second TCI states may be a subset of the one or more first TCI states. The first UE may transmit to the second UE, or receive from the second UE, a sidelink message via a sidelink channel based on a third TCI state. The third TCI state may be from the one or more second TCI states.

A method by which a terminal transmits a data channel in a wireless communication system is disclosed. Particularly, in the disclosure, a plurality of reference signals are transmitted through a plurality of transmission beams within a first frequency band, first information related to the reception quality of at least one reference signal from among the plurality of reference signals is received within a second frequency band, a transmission beam through which the data channel is to be transmitted is determined on the basis of the first information, and the data channel is transmitted through the transmission beam within the first frequency band, wherein the first frequency band is higher than the second frequency band.

Aspects relate to techniques for communication between wireless communication devices using ranging channel information obtained by each of the wireless communication devices. For example, a first wireless communication device may obtain first monostatic ranging channel information based on reflected ranging signals received in response to transmission of a ranging signal. In addition, the first wireless communication device may receive ranging feedback information from a second wireless communication device associated with second monostatic ranging channel information obtained by the second wireless communication device. The first wireless communication device may then determine bistatic channel information from the first monostatic ranging channel information and the ranging feedback information and transmit a message to the second wireless communication device based on the bistatic channel information.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured with a set of beamforming weights, each beamforming weight corresponding to a transmit beam of a set of transmit beams that may each include a same primary lobe and one or more different side lobes. The UE may then perform a beam training procedure to determine which transmit beams cause more or less interference at one or more nearby UEs. The UE may transmit signals using one or more of the transmit beams, and the nearby UEs may determine which transmit beams and corresponding beamforming weights cause more or less interference. The nearby UEs may then indicate those transmit beams or beamforming weights that cause more or less interference via different options.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, at least one of a first indication of a set of beams allowed for sidelink communication or a second indication of a range allowed for a sidelink transmission parameter. The UE may communicate on a sidelink in accordance with at least one of the set of beams or the range. Numerous other aspects are described.

Methods, systems, and devices for wireless communications are described. A device may be configured to support multi-beam, or multi-panel operations, or both which may allow multiple sidelink transmissions to occur simultaneously. In some cases, flexible beam-management for the beamformed sidelink communications is implemented to manage the beams. A transmitting UE may indicate transmission beam information to the base station that the base station may use to schedule sidelink transmissions as part of a beam management procedure. The beam management procedure may allow a transmitting UE to update transmission beam information based on the mobility of the sidelink UEs and other environmental factors. In some cases, beam management includes a beam training procedure that may be implemented to refine the sidelink beams, where support for multi-panel and multi-beam operation may allow for multiple beams to be trained simultaneously.