Abstract: Methods, systems, and devices for wireless communications are described. In some examples, a base station may identify one or more communication paths to a user equipment (UE), and may determine an end-to-end signal quality for each communication path (e.g., a signal-to-noise ratio (SNR)), one or more hop SNR values for each hop of each communication path, a ratio of the hop SNR values and the end-to-end SNR of each communication path, or a combination thereof. Based on the determined SNR values, ratios, or both, the base station may select a first communication path for a first type of communications (e.g., uplink, downlink, signal type, or the like) and a second communication path for a second type of communications (e.g., uplink, downlink, signal type, or the like), and may communicate with the UE using the selected communication paths.

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: This disclosure provides systems, methods, and apparatuses for retransmission of a communication by a relay node based on a failure of a target node to receive the communication. In some aspects, the relay node may determine that the second wireless node has failed to receive the second communication, or an upstream wireless node (such as a distributed unit) may determine that the target node has failed to receive the communication. The relay node may retransmit the communication based on such a determination. In some aspects, the relay node may buffer the communication or information used to generate the communication, and may retransmit the buffered communication. In some aspects, a configuration for the retransmission may be modified based on a capability of the relay node or another concern.

Abstract: Methods, systems, and devices for wireless communication are described. For example, the described techniques provide for a base station of a wireless communications system to determine a configuration for a repeating device to forward signals to another device. In some examples, the configuration may be based on a number of repeating devices in the wireless communications system. The base station may also transmit a message for the repeating device to forward. In some examples, based on a buffering capability of the repeating device, the base station may transmit the message with a zero time offset relative to the control signaling. The repeating device may receive and process the control signaling and receive and buffer the message. In response to processing the control signaling, the repeating device may transmit the buffered message to another device. Implementing aspects of present disclosure may enable an increased efficiency of forwarding in wireless communications systems.

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.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a base station may determine a transmit power to be used by a downstream node or an amplification gain to be used by the downstream node when relaying or repeating messages to a target node. The base station may transmit, to the downstream node, a message intended for the target node, the message having an indicated transmit power, wherein the message intended for the target node is transmitted by the base station using an actual transmit power. In some aspects, the indicated transmit power is the transmit power to be used by the downstream node, so that when the message intended for the target node is repeated by the downstream node, the indicated transmit power of the repeated message matches the actual transmit power of the repeated message.

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 communications are described. A wireless repeater may monitor for transmissions from multiple base stations. For example, a wireless repeater may communicate with a first base station and forward transmissions from the first base station to various user equipment (UEs). Such transmissions may include transmitting synchronization signal blocks (SSBs) for the first base station. The first base station may instruct the wireless repeater to monitor for SSBs from other base stations, where the wireless repeater may indicate the monitoring results in a report to the first base station. Based on the report, the first base station may transmit an indication of a beam pattern to the wireless repeater. The wireless repeater may use the beam pattern for repeating transmissions of SSBs received from the first base station, SSBs received from the second base station, or any combination thereof.

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: The described techniques relate to improved methods, systems, devices, and apparatuses that support modem control using millimeter wave (mmW) energy measurement. Generally, the described techniques provide for wireless device (e.g., wireless repeater) power savings in the absence of an attached (e.g., connected) user equipment (UE). For example, a wireless repeater may perform relay operations (e.g., amplification and forwarding operations) for communications between a base station and a UE in some channel (e.g., in a mmW channel). The wireless repeater may use energy measurements in the channel (e.g., analog mmW measurements) to control or configure a digital interface for monitoring out of band control information (e.g., in a sub-6 gigahertz (GHz) channel). For example, a wireless repeater may use energy measurements of signals transmitted by devices in a mmW band to configure (e.g., turn on) a digital interface of another modem to monitor for control information in a sub-6 GHz band.

Abstract: The apparatus may be a first device at a first RU (e.g., UE, base station, etc.). The first RU may be configured to receive, from a control unit, a configuration for relaying or repeating data received from a second RU to a receiving unit. The first RU may further be configured to determine whether first feedback associated with the data is received from the second RU. The first RU may also be configured to transmit second feedback to the receiving unit or the control unit, the second feedback including first information indicating at least one of the first feedback or whether the first feedback was received.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a relay/repeater unit (RU) in an integrated access/fronthaul (IAF) network, receives, from an upstream node, a first physical downlink control channel (PDCCH) message associated with a scheduled physical uplink control or shared channel (PUXCH) transmission from a downstream node at a scheduled time, and relays or repeats the first PDCCH message to the downstream node. If the scheduled PUXCH transmission associated with the first PDCCH message is not received from the downstream node at the scheduled time, the RU sends a negative acknowledgement (NACK) message associated with the scheduled PUXCH transmission to the upstream node. The RU may also or alternatively generate a second PDCCH message associated with a rescheduled PUXCH transmission and send the second PDCCH message to the downstream node.

Abstract: Methods and apparatus for implementing a repeater are described. In various embodiments the repeater determines uplink/downlink timing information either from information broadcast from a base station or from monitoring received signals and/or gaps between received signals. In various embodiments while the repeater may decode control information to determine uplink/downlink time periods, user data is not decoded and re-encoded. In various embodiments interference between uplink and downlink circuitry is reduced or minimized by controlling gains, combining weights and/or power to amplifiers in the repeater based on the mode of operation. A stored information can include sets of different weights and/or parameters for the mode of operation and/or beam forming antenna pattern in use at a given time.

Abstract: Methods, systems, and devices for wireless communication are described. In aspects of the present disclosure, a user equipment (UE) may report metrics (e.g., received signal power, beam identifier) about synchronization signal (SS) beams using the same (e.g., or a similar) framework that is used for channel state information reference signal (CSI-RS) reporting. Because SSs are intended to be broadcast across a wide coverage area in a beamformed manner, the SSs represent a promising complement to existing beam management techniques. Accordingly, beam management may be achieved at least in part based on reporting one or more metrics of beamformed SSs through a channel feedback framework.

Abstract: A user equipment (UE) may communicate with a base station through a first active beam, the first active beam comprising a serving beam. The UE may receive a first reference signal and a second reference signal associated with beam tracking from the base station, where the first reference signal is received through a first beam of a first plurality of beams and the second reference signal is subsequently received through a second beam of a second plurality of beams, and where the beam tracking includes identifying a new beam for communication between the UE and the base station. The UE may communicate with the base station through a second active beam based on at least one of the first reference signal or the second reference signal associated with the beam tracking, the second active beam comprising the new beam.

Abstract: Various aspects of the disclosure relate to reporting a power limit along with an indication of at least one constraint upon which the power limit is based. In some aspects, the constraint is a radio frequency (RF) exposure constraint. For example, a power headroom limit calculated by a first apparatus may be constrained by a specific absorption rate (SAR) limit or a maximum permissible exposure (MPE) limit. The first apparatus may thus report to a second apparatus the current power headroom limit of the first apparatus along with an indication of whether the power headroom limit is constrained by an SAR limit or an MPE limit (e.g., as opposed to being constrained by a maximum transmit power limit). The second apparatus may then schedule the first apparatus taking into account the power headroom limit and the corresponding constraint (e.g., maximum power or SAR/MPE).

Abstract: Aspects described herein relate to establishing a control connection with at least a first node for receiving control information for providing a repeater function for two or more upstream nodes, communicating control information over the control connection from at least the first node, and providing, based on the control information, the repeater function between at least a first upstream node of the two or more upstream nodes and at least one downstream node and between at least a second upstream node of the two or more upstream nodes and the at least one downstream node or at least another downstream node.

Abstract: Aspects described herein relate to establishing a control connection with at least a first node and a second node for receiving control information for providing a repeater function between two or more wireless nodes. Control information can be communicated over the control connection from one or more of at least the first node or the second node. The repeater can provide, based on the control information, the repeater function between the two or more wireless nodes. Other aspects relate to establishing a control connection with a first node for receiving control information for providing a repeater function for one or more upstream nodes, receiving control information over the control connection, determining a conflict in receiving the control information or a conflict within the control information for two or more upstream nodes, and providing, based on the control information and conflict, the repeater function for the one or more upstream nodes.

Abstract: Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for initiating directional repeaters (wireless devices that relay directional wireless signals) that have an ability to be controlled by a base station (BS), for example, for beamforming purposes.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device, such as a repeater, may select a polarization configuration for multiple antennas that form beams for forwarding wireless communications between a first wireless device and a second wireless device. The repeater may forward wireless communications between the first wireless device and the second wireless device according to the polarization configuration. Numerous other aspects are described.