Disclosed are a method and a device for sidelink groupcast communication. A method for operating a transmitting terminal comprises the steps of: transmitting an SS/PBCH block for sidelink communication in all directions by using a beam sweeping method; receiving, from a plurality of receiving terminals, first feedback information about the SS/PBCH block; and transmitting a sidelink channel in a specific direction by using beams of the transmitting terminal that are determined on the basis of the first feedback information. Therefore, communication system performance can be improved.

Embodiments are presented herein of processors, systems, and methods for performing cellular sidelink communication using a sidelink control channel with frequency hopping and multi-beam diversity. A first wireless device may receive cellular sidelink control channel configuration information. The cellular sidelink control channel configuration information may indicate a cellular sidelink control channel configuration that includes one or more of frequency hopping or multi-beam diversity. The first wireless device may perform cellular sidelink communication with a second wireless device using the cellular sidelink control channel configuration that includes one or more of frequency hopping or multi-beam diversity.

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.

The present disclosure discloses a beam selection method, a terminal device, and a computer storage medium, where the method includes: selecting a first transmission beam for transmitting data between a first terminal device and a second terminal device based on a geographical position of the first terminal device and a geographical position of the second terminal device; and transmitting data to the second terminal device based on the first transmission beam.

A first terminal apparatus sends K2 first reference signals to a second terminal apparatus in K1 directions. The first terminal apparatus determines that beams in the K1 directions all fail for N1 consecutive times. The first terminal apparatus sends P2 second reference signals to the second terminal apparatus in P1 directions. The first terminal apparatus determines, based on measurement results that are of the P2 second reference signals and that are from the second terminal apparatus, whether P1 beams corresponding to the P1 directions are available.

This disclosure relates to the set-up, activation, and deactivation of sidelink carrier aggregation, and includes a method and apparatus for transmitting or receiving a reference signal to a second UE on a designated sidelink component carrier as part of an initial beam scanning procedure; receiving a configuration message from a network entity indicating one or more additional sidelink component carriers for the first UE and the second UE; and communicating with the second UE via a sidelink corresponding to at least one of the one or more additional sidelink component carriers or the designated sidelink component carrier based on the configuration message on a sidelink beam pairing performed in the designated sidelink component carrier, wherein the first UE and the second UE are configured in coverage with the network entity.

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.

A wireless device may receive, from a base station, a timing offset indicator indicating an offset between a sidelink feedback resource and an uplink feedback resource. The wireless device may determine a second slot based on the timing offset indicator and a first slot for a sidelink feedback of a sidelink transport block transmitted by the wireless device. The wireless device may transmit, to the base station and via the uplink feedback resource in the second slot, a sidelink feedback report based on the sidelink feedback.

Certain aspects of the present disclosure to techniques for sidelink discovery in millimeter wave (e.g., Frequency Range 2 (FR2), or 24.25 GHz to 52.6 GHz) bands. For example, the disclosed techniques provides generating a sidelink discovery message including device information of the UE and non-device information. The sidelink discovery message is outputted for transmission. A sidelink connection with a receiver (Rx) UE can then be established after the output of the sidelink discovery message. Very often, beam training is required for FR2 communications. After beam sweep, the transmitter (Tx) UE and the Rx UE become aware of the primary beam directions and need to discover each other on a device level, by associating a beam pair link to a peer UE. As FR2 link often have high overhead to establish and maintain, the disclosed techniques enables device level and service level discovery using the discover message.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may establish an access link with a base station using one or more of a first beam or a first set of beams. The UE may therefore receive, via the access link, control signaling indicating a first configuration for a sidelink channel. In some examples, the UE may switch from the first configuration to a second configuration for the sidelink channel based on detection of an event for one or more of the first beam or the first set of beams and communicate with a second UE via the sidelink channel using the second configuration.