Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for control signal transmission. One aspect provides a method for wireless communication by a user equipment (UE). The method generally includes receiving, from a base station (BS), a message indicating multiple configurations for physical uplink control channel (PUCCH) transmission; selecting, from a sequence database, a sequence to be used for the transmission of a PUCCH in accordance with one of the multiple configurations indicated by the message from the base station; and transmitting the PUCCH using the selected sequence.

Abstract: Methods, systems, and devices for wireless communications are described. A relay user equipment (UE) may transmit, to a network entity, a relay report message including information supporting full duplex relaying of reverse link signaling from the remote UE. Such a relay report message may include information that facilitates relaying of the reverse link communications while reducing or mitigating cross-link interference (CLI), self-interference (SI), or both, in a full duplex (FD) mode. For example, the relay report message may include information triggering beam sweeping, beam selection, resource selection, etc., for the relaying of the reverse link communications. In some examples, a network entity may configure sidelink UEs with an FD sidelink slot format that supports sidelink transmissions in the final symbol of a sidelink slot (e.g., instead of relying on one or more gap symbols).

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, based at least in part on using a sidelink with a second UE, a first indication of a first availability state associated with a sidelink air interface resource and detected by the first UE. The first UE may receive, based at least in part on using the sidelink, a second indication of a second availability state associated with the sidelink air interface resource, the second availability state not generated by the first UE. The first UE may select a duplex communication configuration based at least in part on the first availability state and the second availability state. The first UE may communicate with the second UE using the sidelink air interface resource based at least in part on the duplex communication configuration. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a network node, an indication that a bidirectional full duplex sidelink transmission between the first UE and a second UE is feasible. The first UE may transmit, to the network node, sidelink scheduling information that is recommended for the bidirectional full duplex sidelink transmission. The first UE may receive, from the network node, downlink control information (DCI) that schedules the bidirectional full duplex sidelink transmission, the DCI being based at least in part on the sidelink scheduling information and the indication that the bidirectional full duplex sidelink transmission between the first UE and the second UE is feasible. The first UE may transmit, to the second UE, the bidirectional full duplex sidelink transmission. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select sidelink resources for full duplex communication from among available sidelink resources. The UE may communicate in full duplex using the selected sidelink resources. Numerous other aspects are described.

Abstract: A relay UE may identify feasibility of FD relaying at the relay UE. The FD relaying at the relay UE may include simultaneous downlink reception from a network node and sidelink transmission to a remote UE. The relay UE may transmit, for the network node, an FD relay assistance information message based on the identified feasibility of the FD relaying at the relay UE. The network node may schedule a first downlink transmission from the network node to the relay UE and at least one first sidelink transmission from the relay UE to the remote UE based on the FD relay assistance information message.

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless communication systems, a first network node may transmit, prior to being radio resource control (RRC)-connected with a second network node, a first message indicating a first capability of the first network node to support full-duplex communications. After transmitting the first message and while RRC-connected with the second network node (and before, during, or after exchanging data with the second network node), the first network node may transmit one or more second messages indicating a second capability of the first network node to support full-duplex communications. The second capability may update or change the first capability indicated via the first message. The first network node and the second network node may communicate in accordance with the second capability indicated in one of the second messages.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE, reference signals using transmit (Tx) beams of the first UE based at least in part on a Tx beam sweeping, wherein self-interference measurements associated with the first UE are based at least in part on the reference signals. The first UE may transmit, to the second UE, an indication of candidate full duplex Tx-Rx beam pairs, wherein the candidate full duplex Tx-Rx beam pairs are based at least in part on the self-interference measurements. The first UE may receive, from the second UE, an indication of a full duplex Tx-Rx beam pair selection from the candidate full duplex Tx-Rx beam pairs. Numerous other aspects are described.

Abstract: A method for wireless communication at a first network entity and related apparatus are provided. In the method, the first network entity communicates, with a second network entity, information indicative of a guard interval length. The information indicative of the guard interval length is based on transmission information. The first network entity further communicates, with the second network entity, a transmission including one or more symbols. Each symbol of the one or more symbols includes a particular guard interval based on the information indicative of the guard interval length. The method enables the GI length to be flexibly configured depending on various waveforms or channel parameters and characteristics of the transmission. The method enables transmission resources to be fully utilized according to actual operating conditions. Thus, it improves the efficiency and flexibility of wireless communication.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit an indication that the UE supports a plurality of cyclic prefix configurations. The UE may receive, from a network entity, an indication of a first cyclic prefix configuration of the plurality of cyclic prefix configurations, the first cyclic prefix configuration indicating a first symbol period structure that includes a guard interval that occurs in a symbol period prior to a portion of the symbol period copied as a cyclic prefix based at least in part on a delay spread exceeding a length of the cyclic prefix. The UE may communicate one or more messages with the network entity in accordance with the first cyclic prefix configuration.

Abstract: Methods, systems, and devices for wireless communication are described. Some user equipments (UEs) and base stations may communicate in a set of transmission time intervals (TTIs) according to a configured subcarrier spacing (SCS). Each TTI may include, in accordance with the SCS, a quantity of symbols, a corresponding quantity of cyclic prefixes, and a padding duration that may be longer than a symbol duration. The base station may transmit a control signal to the UE to indicate a configuration for the padding duration. The configuration may allocate the padding duration for reference signal repetition or one or more other operations. In some examples, the padding duration may be allocated for beam switching, and the one or more other operations may be different than beam switching. The UE and the base station may perform the reference signal repetition or the other operations during the padding duration based on the configuration.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, using a sidelink with a second UE, a first indication of one or more candidate full-duplex (FD) beam pairs selected by the first UE for an FD sidelink transmission. The UE may receive, using the sidelink, a second indication that specifies at least part of an FD beam set that includes a first FD beam pair associated with the first UE and a second FD beam pair associated with the second UE, the FD beam set being based at least in part on the one or more candidate FD beam pairs. The UE may communicate with the second UE using the sidelink based at least in part on the FD beam set and the FD sidelink transmission. Numerous other aspects are described.

Abstract: The present disclosure provides systems, apparatuses, methods, and computer-readable media for event identification for beam failure reporting in a wireless communication system. A user equipment (UE) may detect a beam failure event associated with a downlink communication beam and may transmit a beam failure report (BFR) message associated with the beam failure event. The BFR message may include an event identifier (ID) associated with a time of the beam failure event. Alternatively, or in addition to the event ID, the BFR message may include one or more other features, such as an indication of a priority level associated with the BFR message. A network node may receive the BFR message and may transmit a response to the BFR message. The response may indicate one or more operations to be performed by the UE, such as a beam recovery operation to “recover” the downlink communication beam.

Abstract: Aspects presented herein may enable a UE to transmit a PUCCH formed by a flexible concatenation of different types of blocks, such as one or more data sample blocks, one or more RS blocks, and/or one or more gap blocks within a PUCCH symbol. In one aspect, a UE receives, from a network entity, an indication to transmit one or more PUCCH symbols that are associated with a coherent PUCCH format, where each PUCCH symbol of the one or more PUCCH symbols associated with the coherent PUCCH format includes at least one RS sample block, at least one data sample block, or at least one gap sample block multiplexed in time-domain. The UE transmits, for the network entity, the one or more PUCCH symbols.

Abstract: Aspects relate to techniques for configuring intermittent time domain resources that are usable by a user equipment (UE) for communication with a base station. The base station may transmit a usable time domain resource (TDR) configuration to the UE that indicates the usable time resources that are available to the UE for communication with the base station. The UE may then communicate with the base station based on the usable TDR configuration.

Abstract: A method for wireless communication at a user equipment (UE) includes receiving, from a base station, a slot parameter that configures the UE to receive a number of symbols within a self-contained slot. The method also includes receiving, from the base station, a cyclic prefix (CP) parameter associated with a single symbol of the number of symbols, the CP parameter indicating a source of samples for a CP included at a beginning of the single symbol. The method further includes receiving, from the base station, the number of symbols within the self-contained slot. In some examples, a guard interval (GI) may be included at one or both of an end or a beginning of each symbol of the number of symbols. The CP may be outside a single FFT window of a number of FFT windows, associated with the single symbol of the number of symbols.

Abstract: Certain aspects of the present disclosure provide techniques for receiving an indication of variable tracking reference signal (TRS). A method that may be performed by a user equipment (UE) includes determining a configuration indicating a value for a variable tracking reference signal (TRS) density, monitoring for TRSs from a base station (BS) according to the indicated value for the variable TRS density, and performing at least one of frequency tracking or timing tracking based on the monitoring.

Abstract: Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for a user equipment (UE) to determine whether to request coverage enhancement for a random access procedure based on a condition of a channel between the UE and a base station failing to satisfy a threshold. The UE may transmit a request for coverage enhancement for a second random access message (e.g., a random access Message 4 (Msg4)) using a first random access message (e.g., a random access Message 3 (Msg3)). The base station may determine whether to perform the coverage enhancement in response to receiving the first random access message and may transmit the second random access message accordingly. Implementing aspects of the present disclosure may enable coverage enhancement for random access procedures in wireless communications systems.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive at least one control message including an indication that frequency hopping for downlink control information (DCI) is activated for physical downlink shared channel (PDSCH). The UE may determine a frequency hopping configuration (e.g., a frequency hopping pattern) for the DCI, which may be applied for PDSCH occasions, for a group of PDSCH occasions, or until changed by another indication from the network. The UE may also receive a downlink reference according to the frequency hopping configuration. For example, if intra-occasion frequency hopping is activated, demodulation reference signals (DMRS) may be received in each hop of the DCI within a PDSCH occasion, and if inter-occasion frequency hopping is activated, DMRS may be received once per PDSCH occasion.

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive signaling from a base station that schedules the UE to transmit a second uplink signal using a second spatial relationship following transmission of a first uplink signal using a first spatial relationship. The second uplink signal may be scheduled within a beam switching gap associated with switching from the first spatial relationship to the second spatial relationship. In some examples, the UE may transmit the second uplink signal using the first spatial relationship, rather than switching to using the second spatial relationship. In some examples, the UE may shorten the first uplink signal or the second uplink signal (or both) to accommodate the beam switching gap.