Abstract: This disclosure provides systems, methods and apparatuses for efficient signaling of feedback regarding communications of a relaying operation. In some aspects, a relay node may defer feedback regarding reception of a first communication until relaying feedback regarding the payload of the first communication, thereby reducing overhead and signaling burden. In some aspects, a relay node may skip the transmission of feedback regarding the first communication altogether, either on the assumption that the link between the relay node and the first wireless node is reliable, or on the basis of the first wireless node being able to infer the reception of the first communication based on subsequent communications. In some aspects, a relay node may be enabled to skip forwarding of feedback from a second wireless node, such that the first wireless node can infer that the payload was received if no negative feedback associated with the payload is received.

Abstract: Methods, systems, and devices for wireless communications are described. A base station may concurrently configure repeaters in a wireless communications system via multicast control messaging. The base station may identify a quantity of repeaters in communication with the base station. Some repeaters may be in communication with the base station via other repeaters, for example in a chain configuration. The base station may prepare a multicast message including control information for the quantity of repeaters. In some examples, the base station may transmit the multicast message directly to each repeater in the quantity of repeaters, which may be referred to as a single hop control transmission. In some examples, the base station may transmit the multicast message via one or more chains of repeaters, which may be referred to as a multi-hop control transmission. The described techniques may include improved repeater operations and promote efficient repeater communications, among other benefits.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless forwarding node may determine a timing reference configuration that indicates an alignment for one or more symbol boundaries associated with forwarding communications between an upstream wireless node and a downstream wireless node. The wireless forwarding node may forward the communications between the upstream wireless node and the downstream wireless node based at least in part on the timing reference configuration. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a repeater may steer a narrow beam in a plurality of directions in a time sequence according to a beam sweep pattern, and retransmit one or more communications between a base station and one or more user equipments (UEs) using at least the narrow beam in the beam sweep pattern. A base station may determine a beam sweep pattern of the repeater based at least in part on feedback from the UEs. Numerous other aspects are provided.

Abstract: A relay supporting multiple relay modes is provided. The relay transmits capability information to a base station, the capability information indicating support for a first relay mode and a second relay mode. The relay determines a mode of operation, either on its own or based on an indication of a mode of operation from the base station, wherein the mode of operation comprises the first relay mode or the second relay mode. The relay communicates with at least one of the base station or another wireless device based at least in part on the determined mode of operation.

Abstract: Methods, systems, and devices for wireless communications are described. A relay node may detect that a person is within a proximity threshold of the relay node, the proximity threshold being associated with a maximum permissible exposure limit. The relay node may determine, based at least in part on the detecting, that a first beamforming configuration is to be updated, the first beamforming configuration associated with beamformed communications relayed by the relay node between a first wireless node and a second wireless node using a first beam. The relay node may identify a second beamforming configuration for relay of the beamformed communications between the first wireless node and the second wireless node via a second beam having an exposure indicia that satisfies the maximum permissible exposure limit. The relay node may relay the beamformed communications between the wireless nodes using the second beam in accordance with the second beamforming configuration.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may initiate a beam management procedure, including reference signal transmission to a user equipment (UE) and receive beam training. A base station may configure a UE to monitor a set of beams for reference signals. Based on the received reference signals, the UE may optionally select one or more transmit beams for wakeup signal reception, and may transmit an indication of the selected beams to the base station. The base station may transmit a wakeup signal over the originally configured or the UE-selected transmit beams to initiate wake-up procedure at the UE. The base station and UE may subsequently perform a refined beam management procedure, providing a refined reference signal transmission from the base station. Based on the received transmission, the UE may select a refined beam for downlink transmissions.

Abstract: Methods, apparatuses, and computer-readable medium for fronthaul compression are provided. An example method may include receiving, from a UE, uplink data via one or more active tones of a plurality of tones in a symbol, the uplink data corresponding to an access vector. The example method may further include compressing the uplink data based on a linear transformation of a pseudo-access vector generated based on the access vector, the linear transformation including a matrix, the compression enabling a second network entity to decompress the compressed uplink data without knowing one or more locations associated with the one or more active tones. The example method may further include transmitting, to the second network entity, the compressed uplink data.

Abstract: A method, a computer-readable medium, and an apparatus are provided. The apparatus may be a repeater node. The apparatus may receive, at one or more first antennas of the node, a first signal via at least one first beam. The apparatus may measure, at one or more third antennas of the node, at least one of a power or a quality of at least one third beam. The at least one of the power or the quality of the at least one third beam may be measured at a same time as the first signal is received. The apparatus may forward, at one or more second antennas of the node, the first signal via at least one second beam.

Abstract: Methods, systems, and devices for wireless communication are described. A network device, such as a base station, may transmit a request message to a user equipment (UE). The request message may include a request for the UE to transmit a set of sounding reference signals (SRSs). The set of SRSs may include two (or more) beamformed signals. The network device may receive the set of SRSs according to the request message. The network device may identify, based on a co-phasing parameter associated with the two (or more) beamformed signals, an antenna port precoder configuration to use for communicating with the UE.

Abstract: Aspects of the disclosure relate to repeater controlled by a base station. The repeater receives control signaling including control information in association with traffic relayed through the repeater, between a first wireless communication device and a second wireless communication device, the repeater obtains a time division duplex state from the control information, obtains a fronthaul-link transmission control indicator (TCI) state index from the control information, obtains an access-link TCI state index from the control information, obtains a time domain resource allocation from the control information, and configures a relay unit of the repeater to communicate the traffic between the first wireless communication device and the second wireless communication device based the control information comprising at least one of: the time division duplex state, the fronthaul-link TCI state index, the access-link TCI state index, and the time domain resource allocation.

Abstract: Apparatus, methods, and computer-readable media for facilitating beam training with relay link are disclosed herein. An example method for wireless communication at a control node includes determining a first set of measurements associated with at least one set of beam pairs. In some examples, the at least one set of beam pairs is associated with a wireless backhaul link between a first wireless device and a relay device, a first relay access link portion between the first wireless device and the relay device, or a second relay access link portion between the relay device and at least one second wireless device. The example method also includes configuring at least one subset of beam pairs of the at least one set of beam pairs based on the first set of measurements. Additionally, the example method includes transmitting information indicating the at least one subset of beam pairs to the relay device.

Abstract: Aspects of the disclosure relate to beam configuration for RF repeaters. An RF repeater is configured to measure received power of one or more signals in the repeater for each of a plurality of beam directions. Further, the repeater determines a beam forming configuration for a fronthaul link between the repeater and at least one base station based on the measured received power of each of plurality of beam directions. The repeater may also be configured to determine beam configurations for access links between the repeater and user equipment.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a repeater may identify one or more parameters for mechanical beam steering. The repeater may perform mechanical beam steering based at least in part on the one or more parameters. Numerous other aspects are provided.

Abstract: An apparatus may configure a first set of resources associated with first control information for a relay device. The apparatus may configure a second set of resources associated with at least one of data or second control information for at least one UE, and the second set of resources may at least partially overlap with the first set of resources. The apparatus may transmit information indicating the first set of resources and the second set of resources to the relay device. Further, the apparatus may communicate, with the relay device, the first control information on the first set of resources and the at least one of data or second control information on the second set of resources, and the relay device may be configured to relay the at least one of data or second control information between the apparatus and the at least one UE.

Abstract: Methods, apparatuses, and computer-readable medium for fronthaul compression are provided. An example method may include receiving, from a UE, uplink data via one or more active tones of a plurality of tones in a symbol, the uplink data corresponding to an access vector. The example method may further include compressing the uplink data based on a linear transformation of a pseudo-access vector generated based on the access vector, the linear transformation including a matrix, the compression enabling a second network entity to decompress the compressed uplink data without knowing one or more locations associated with the one or more active tones. The example method may further include transmitting, to the second network entity, the compressed uplink data.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a repeater may receive, in a bandwidth part that carries a control interface of the repeater, an indication of a repeater configuration for the repeater. The repeater may communicate, based at least in part on the repeater configuration, with at least one of a base station or a user equipment. Numerous other aspects are provided.

Abstract: A UE my receiving an indication of a beam pair link (BPL), wherein the BPL comprises a base station (BS) transmit beam and a corresponding UE receive beam. The UE may tag the BPL based on the UE receive beam. The UE may take one or more actions associated with the tagged BPL.

Abstract: A relay supporting multiple relay modes is provided. The relay transmits capability information to a base station, the capability information indicating support for a first relay mode and a second relay mode. The relay determines a mode of operation, either on its own or based on an indication of a mode of operation from the base station, wherein the mode of operation comprises the first relay mode or the second relay mode. The relay communicates with at least one of the base station or another wireless device based at least in part on the determined mode of operation.

Abstract: A method of wireless communication by a repeater includes collecting sensor information associated with an environment of the repeater. The method also includes receiving control information from a control node for a repeating operation. The method further includes repeating a wireless signal received from a first device towards a second device in accordance with the control information and the sensor information. A method of wireless communication by a control node includes collecting sensor information from a repeater. The sensor information is associated with an environment of the repeater. The method also includes generating control information for the repeater based on the sensor information, and transmitting the control information to the repeater.