Abstract: A radar system may comprise a radar server configured to determine (1) one or more transmit timing parameters and (2) one or more receive timing parameters. The radar server may provide the one or more transmit timing parameters to a first wireless communications system Transmission Reception Point (TRP) configured to use the one or more transmit timing parameters to send a transmit signal. The radar server may provide the one or more receive timing parameters to a second wireless communications system TRP configured to use the one or more receive timing parameters to receive an echo signal corresponding to a reflection of the transmit signal from a target.

Abstract: Radio frequency (RF) sensing of a target object by a wireless network is supported by a sensing node and a network node using sensing assistance data. The sensing assistance data may include information for Doppler estimation from received RF signals. The information for Doppler estimation, for example, may include an indication of phase coherency of RF signals, such as phase coherence found in positioning reference signal (PRS) resources, resource sets, transmission reception points (TRPs), frequency layer or any combination thereof. The sensing assistance data may include an association of PRS resources and reference point objects (RPOs) so RF signals reflected from the RPOs may be excluded from the sensing measurements. The sensing assistance data may include beam pattern information for PRS resources for beam coordination for RF sensing.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, an indication of a subset of tracking reference signal (TRS) resource sets from a plurality of TRS resource sets. The UE may receive, from the network node, a TRS availability indication bitmap that indicates an availability of a TRS associated with the subset of TRS resource sets. The UE may determine that the TRS is available based at least in part on the TRS availability indication bitmap. The UE may receive, from the network node, the TRS based at least in part on the TRS availability indication bitmap indicating that the TRS is available. Numerous other aspects are described.

Abstract: Techniques for communication by a user equipment (UE) are disclosed. Techniques can include determining a positioning state information (PSI) report to transmit, where the PSI report comprises positioning-related information, and selecting a physical uplink control channel (PUCCH) resource with which to transmit the PSI report, where the selected PUCCH resource comprises a number of resource blocks (RBS). Techniques can further include determining whether to transmit the PSI report using the selected PUCCH resource, based on: the number of RBS, a size of uplink control information (UCI) to be transmitted using the selected PUCCH resource, the selected PUCCH resource being configured with a capability to include both the PSI report and a hybrid automatic repeat request acknowledgment (HARQ-ACK), or the selected PUCCH resource being configured to include only one or more PSI reports, and optionally one or more CSI reports, as a payload, or any combination thereof.

Abstract: Disclosed are various techniques for wireless communication. In an aspect, a user equipment (UE) identifies a set of positioning sources, each positioning source comprising a positioning reference signal (PRS) resource, a PRS resource set, a PRS frequency layer, and/or a transmission/reception point (TRP). From the set of positioning sources, the UE identifies a consistency group comprising a collection of positioning sources grouped based on expected values of at least one metric of a reference signal from each positioning source, measured values of the at least one metric for the reference signal from each positioning source, and an error threshold. The UE identifies one or more subsets of positioning sources within the consistency group, each subset having at least one metric error value. The UE reports, to a network entity, information about the consistency group and information about at least one of the subsets of positioning sources within the consistency group.

Abstract: Disclosed are techniques for radio frequency (RF) sensing. In an aspect, a network entity, such as a base station, may identify an opportunity for RF sensing during which a user equipment (UE) does not transmit signals, the opportunity comprising a guard period of the UE, a bandwidth part (BWP) switching period of the UE, or a beam switching period of the UE. The network entity may transmit an RF sensing signal, receive an RF sensing signal, or both, during the opportunity for RF sensing. In an aspect, a UE may determine an opportunity for a network entity to perform RF sensing while the UE does not transmit signals, the opportunity comprising a guard period of the UE, a BWP switching period of the UE, or a beam switching period of the UE. The UE may indicate, to the network entity, the opportunity for RF sensing.

Abstract: Disclosed are techniques for wireless communication, and specifically for reconfigurable intelligent surface (RIS)-aided positioning. In some aspects, a base station (BS) may transmit, to a user equipment (UE), a first positioning reference signal (PRS). The BS may transmit, to RIS configured to reflect a received signal towards the UE, a second PRS. The BS may receive, from the UE, a downlink reference signal time difference (RSTD) measurement for the first PRS and the second PRS.

Abstract: Position determination for a target user equipment (UE) uses a single base station and a plurality of sidelink UEs with known locations. The base station sends a reference signal to the target UE and sidelink UEs, and the target UE sends sidelink signals to each sidelink UEs. A range-sum for the range between the target UE and sidelink UE and the range between the sidelink UE and the base station can be determined for each sidelink UE, based on the time differences between the reception and transmissions of the reference signals measured by the target UE, and the time difference between reception of the reference signals measured by the sidelink UE. A differential in the range-sums can be determined and used to determine the position of the target UE.

Abstract: A signal processing method includes: receiving, at a UE, a PRS and a supplemental signal, the supplemental signal being a broadcast signal and spanning a first frequency range at least partially outside of a second frequency range spanned by the PRS; processing, at the UE, the PRS and the supplemental signal in combination, resulting in an effective signal bandwidth that is larger than the second frequency range, to determine position information; and at least one of: transmitting a capability message, from the UE to a network entity, indicating a processing capability of the UE to process, in combination, the PRS and the supplemental signal; or transmitting a signal-combination indication, from the UE to the network entity, indicating that the UE processed the PRS and the supplemental signal in combination to determine the position information.

Abstract: Wireless positioning accuracy of a user equipment (UE) is impacted by locations of the transmit/receive points (TRPs) and UE for wireless positioning. To improve the accuracy of estimated locations, a geometric dilution of precision (GDOP) may be determined for different groups of candidate TRPs, with the GDOP indicating a potential positioning error associated with the group of candidate TRPs. A UE may determine GDOPs for different combinations of candidate TRPs. One or more devices of a wireless network (e.g., a location server and/or a UE for positioning) may select or exclude one or more candidate TRPs from being used for wireless positioning of a UE based on the determined GDOPs. Exclusion or selection of candidate TRPs for wireless positioning may also be based on quality measurements of PRSs (such as an RSRP or SNR) or a time duration associated with measuring the PRSs from the candidate TRPs to be selected.

Abstract: Techniques for enabling a cross-link interference (CLI) based uplink (UL) angle-of-arrival (AoA) estimations are disclosed. A victim user equipment (UE) may be configured with CLI resources to measure CLIs from one or more aggressor UEs. The victim UE may take the CLI opportunities also to estimate the AoAs of the UL signals from the aggressor UEs. In this way, UE's location estimation may be enhanced.

Abstract: Sounding reference signals (SRS) transmitted by a UE, e.g., for positioning or channel estimation, may be configured for one or both of frequency tone level cyclic shift and symbol level code, which, for example, enables multiplexing a greater number of UEs. The frequency tone level cyclic shift is produced by jointly processing a number of symbols with an extended cyclic shift structure. The SRS may be configured using a symbol group level that indicates the number of symbols associated with a cyclic shift structure, and an outer code that indicates a multiplier applied to the SRS at the symbol level, which increases the multiplexing opportunities. The symbol level code may further indicate an extended cyclic shift indicating a linear increase in phase rotation across tones in symbols associated with the symbol group level.

Abstract: Techniques are provided for reducing the bandwidth required to receive reference signals with a user equipment (UE). An example method for positioning reference signal bandwidth adaptation includes determining a target accuracy, determining a positioning reference signal bandwidth based on the target accuracy, and transmitting a positioning reference signal based on the positioning reference signal bandwidth.

Abstract: Techniques are described for supporting user equipment (UE) positioning in a non-terrestrial network (NTN). To allow calculating a position/location of a UE based on reference signal (RS) measurements to and from one satellite (or a terrestrial base station), a device may be configured to calculate a doppler measurement and a range measurement and report such measurements to be used by a location server to calculate a UE position. An example device may receive a first RS (with the first RS being one of a positioning reference signal (PRS) or a sounding reference signal (SRS)), receive a second RS associated with the first RS, calculate a doppler measurement based on one or both of the first RS or the second RS, and report the doppler measurement. The doppler measurement (such as a measured frequency offset) may be used by a location server to calculate a UE position on the earth surface.

Abstract: A user equipment (UE) transmits a first message spanning a set of physical resource blocks (PRBs). The UE retransmits a first portion of the first message associated with a first subset of one or more PRBs in the set of PRBs, the set of PRBs grouped into a set of PRB bundles including a first subset of PRB bundles corresponding to the first subset of the one or more PRBs and skips retransmission of a second portion of the first message associated with a second subset of the PRB bundles of the set of PRB bundles, the second subset of the PRB bundles corresponding to at least a portion of remaining PRBs in the set of PRBs.

Abstract: In at least one embodiment, a user equipment (e.g., a mobile device) may receive a location request message from a server (e.g., a Location Management Function), wherein the location request message identifies a plurality of Quality of Service parameters for the LTE Positioning Protocol (LPP) positioning session. In at least one embodiment, the user equipment may receive a selection of one or more Quality of Service parameters for the LPP positioning session. In at least one embodiment, the user equipment may configure the user equipment according to the one or more selected Quality of Service parameters. In at least one embodiment, the user equipment may generate a location response message according to the selected QoS parameters. The user equipment may send the location response message to the server. A UE can select the QoS parameters during communication with a server and/or with a second UE via sidelink communications.

Abstract: A first UE may obtain at least one parameter associated with an Rx timing of one or more CLI measurement resources. The one or more CLI measurement resources may be associated with CLI between the first UE and at least one second UE. The first UE may further refrain from receiving one or more serving DL channels or resources from a network node during the Rx timing based on the at least one parameter. The one or more serving DL channels or resources may overlap with at least one symbol of the one or more CLI measurement resources.

Abstract: Techniques for a high-accuracy determination the position of a light user equipment (UE) using a single base station are presented. This is accomplished by leveraging communications with a premium UE having a known location relative to the base station. Wireless reference signals measured by the light UE and premium UE, along with a reference signal from the light UE to the premium UE, can be used to determine the position of the light UE geometrically. The determination can be made by the light UE, premium UE, or a location server, depending on desired functionality.

Abstract: Disclosed are techniques for wireless positioning. In an aspect, a base station determines a channel profile for a multipath channel between the base station and a user equipment (UE) based on at least one positioning reference signal transmitted to the UE or received from the UE by the base station on one or more radio beams, compresses the channel profile into a compressed representation of the channel profile, and transmits the compressed representation of the channel profile to a network entity. The network entity receives the compressed representation of the time-angle channel profile and determines a location of the UE based on the compressed representation of the channel profile.

Abstract: Certain aspects of the present disclosure provide techniques for configuring sounding reference signals (SRS) resources for RRC inactive or idle UEs and multiplexing SRS with small data transmission on preconfigured uplink resources (PUR) An example method by a user equipment (UE) generally includes receiving signaling configuring the UE with SRS resources, QCL relationship, power control and timing advance information for SRS transmissions, and transmitting SRS in conjunction with one or more of the PUR occasions in accordance with the configuration and signaling.