Abstract: Systems and techniques are provided for wireless communications. A first UE can determine assistance information corresponding to one or more uplink (UL) transmissions of the first UE, the assistance information indicative of a periodicity of the one or more UL transmissions. The one or more UL transmissions can be vehicle-to-everything (V2X) UL transmissions of the first UE. The first UE can transmit the assistance information to a network entity. The network entity can determine a discontinuous reception (DRX) configuration for a second UE based on the assistance information, the DRX configuration indicative of a DRX on-duration. The second UE can receive information indicative of the DRX configuration from the network entity. The second UE can receive, from the network entity and during the DRX on-duration, a downlink transmission associated with the first UE. The downlink transmission can be a V2X downlink transmission.

Abstract: Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may generate a first encryption key and a second UE may generate a second encryption key based on a measurement of a channel between the first UE and the second UE. The second UE may transmit, to the first UE, a sidelink message including a one-way digital signature generated using the second encryption key and a message from a defined set of messages. The first UE may generate a set of one-digital signatures using the first encryption key and the defined set of messages and determine whether the one-way digital signature matches one of the set of one-way digital signatures. If there is a match, the first UE and the second UE may communicate using the encryption keys. Otherwise, the first UE and the second UE may generate new encryption keys.

Abstract: Methods, systems, and devices for wireless communications are described in which interference between wireless devices that employ radar detection may be reduced or mitigated. A user equipment (UE) may transmit radar signals for target detection and collision avoidance in accordance with an interference mitigation procedure. The interference mitigation procedure may be based on measurement reports of different UEs that are transmitted to a first node (e.g., a roadside unit (RSU) or base station). The first node may configure a measurement procedure for multiple UEs that includes multiple measurement stages, in which a first stage provides that a subset of UEs transmit while other UEs measure received radar signals, and a second stage switches the transmitting and measuring UEs. Each of the UEs may provide measurement reports to the first node, which determines coordinated transmit parameters for the UEs to reduce interference among the UEs.

Abstract: A vehicle-enabled user equipment (VUE) and related techniques are disclosed. In one aspect, the VUE issues a periodic broadcast, or signals a response to a requesting source, identifying its location management capability (LMC). The UE forms a link with a recipient VUE of the broadcast to perform joint localization of the pedestrian UE (PUE). Joint localization by VUE and another VUE may be performed by VUEs and PUEs in the region exchanging ranging signals and ego measurements. The VUE determines a location jointly of the PUE. The location can be determined upon a request, periodically, or in response to a triggered event.

Abstract: Disclosed are systems and techniques for wireless communications. For example, a device can receive, from a first vehicle, a view request for a visual view of a region of interest (ROI). The device can transmit a request for key points and feature descriptors related to a view of the first vehicle and respective view(s) of the other vehicle(s), and can match the key points/feature descriptors related to the other vehicle(s) and the first vehicle. The device can determine, based on the matching, at least one vehicle to provide at least one ROI view of the ROI and determine at least one mapping between the at least one vehicle and the first vehicle, which can be used to combine the at least one ROI view of the at least one vehicle with the view of the first vehicle to generate a combined image having the visual view of the ROI.

Abstract: Methods, systems, and devices for wireless communications are described. Aspects of the disclosure provide techniques for wireless devices utilizing wireless communications systems to perform radar operations to leverage challenges within radar signaling to detect one or more adverse parties attempting to spoof one or more radar signals. For example, a base station may transmit, to one or more vehicles, a message including an indication of a challenge type, when the challenge is to be applied, or both. Based on the challenge, one or more vehicles may detect that a device associated with the adverse party is not following the challenge as dictated in the message. Based on the detection, the one or more vehicles may report, to the base station, the detection of an adverse party attempting to spoof radars within the wireless communications system.

Abstract: A group of user equipment (UEs) for sidelink communications includes a master UE and member UEs. Any of the UE may measure one or more sidelink synchronization signal sources during a configured measurement gap within the sidelink communications with the group of UEs. A member UE may transmit an alternative synchronization source report indicating detected synchronization sources to the master UE. The master UE is configured to determine to change from a first synchronization source to a second synchronization source for sidelink communications with a group of UEs. The master UE is configured to transmit, to the group of UEs, timing assistance information for synchronization with the second synchronization source. The UEs are configured to switch sidelink communications with the group of UEs to the second synchronization source.

Abstract: Methods, systems, and devices for wireless communications are described. A vehicle user equipment (VUE) may transmit an iterative wake-up signal (WUS) to a first roadside unit (RSU). The iterative WUS may include location information associated with an expected path of the VUE and may instruct the first RSU to transmit one or more other WUSs to at least a second RSU that supports communication along a portion of the expected path of the VUE. In some cases, the first RSU may transmit an iterative WUS to the second RSU, the second RSU may transmit an iterative WUS to a third RSU, and so on until the final RSU along the expected path is woken up with a normative (e.g., non-iterative) WUS. An RSU may provide safety information to the VUE, and after the VUE leaves a service area associated with an RSU, the RSU may activate a low power mode.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a non-terrestrial network (NTN) measurement gap configuration indicating an association of a location configuration with a gap configuration. The UE may selectively perform a measurement of an NTN cell according to the gap configuration based at least in part on a match of a location of the UE to a location indicated by the location configuration. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communication are described. A communication device (e.g., a vehicle) in wireless communications system (e.g., a cellular-vehicle-to-everything (V2X) system) may support adaptive radar transmissions based on information received in a public safety message. The communication device may use information included in the public safety message to adapt radar transmissions to enable timely detection of vulnerable road users (VRUs). In some examples, based on a location and a velocity estimate provided in the public safety message, the communication device may adjust the radar transmissions to experience a trade-off between range and velocity estimation performance. Additionally or alternatively, based on positional accuracy estimates provided in the public safety message, the communication device may adjust the radar transmissions to improve beamforming.

Abstract: Certain aspects of the present disclosure provide techniques for dynamically controlling sidelink resources in a communication network. In one aspect, a method for configuring resources in a communication network, includes: establishing a first data connection with a user equipment; establishing a second data connection with a vehicle user equipment; transmitting to the user equipment via the first data connection an indication to activate a pool of V2X sidelink resources; and transmitting to the vehicle user equipment via the second data connection the indication to activate the pool of V2X sidelink resources.

Abstract: In some implementations, a server may receive, from the target UE, a message indicative of: a capability of the target UE for WLAN positioning, and an absence of a sidelink interface of the target UE with another UE. The server may send instructions to one or more prospective assistance UEs to initiate WLAN functionality to enable the target UE to associate with the one or more prospective assistance UEs. The server may receive, from the one or more prospective assistance UEs, WLAN identification information of the one or more prospective assistance UEs. The server may send WLAN identification information of the one or more prospective assistance UEs to the target UE.

Abstract: Methods, systems, and devices for addressing timing advance (TA) in non-terrestrial network communication is disclosed herein. A wireless transmit and receive unit (WTRU) may receive system information from a base station attached to an airborne or spaceborne vehicle that indicates a physical random access channel (PRACH) resource. The WTRU may determine a timing offset based on a plurality of information, such as the location information and the system information. The WTRU may transmit a preamble using the timing offset via the PRACH resource. The base station may receive the preamble and send a random access response (RAR) that includes, for example, a TA command. The WTRU may receive the RAR including the TA command and combine the timing offset with the TA command to determine an actual TA, after which the WTRU may use the actual TA for uplink transmissions.

Abstract: A method implemented in a wireless transmit/receive unit (WTRU) for wireless communications includes receiving a signal sequence from a base station (BS) and generating a channel quality indicator (CQI) indication based on the signal, transmitting the CQI indication to the BS, receiving a first control message from the BS comprising configuration information, wherein the configuration information includes information elements for configuring CQI subgroups, determining a CQI subgroup identifier (ID) based on the information elements included in the received first control message, and transmitting an energy harvesting feedback using at least one resource associated with the CQI subgroup ID.

Abstract: In various embodiments supporting directional security, a user equipment (UE) may receive from a network device a noise resource allocation including an indication of a noise direction and a noise parameter, generate a noise signal based at least in part on the noise parameter, and transmit the noise signal in the noise direction while transmitting a communication transmission signal in a different direction from the noise direction. In various embodiments, a network device may determine a geographic zone of interest, select one or more reconfigurable intelligent surfaces (RISs) associated with the geographic zone of interest, selecting one or more noise transmitting UEs, control the one or more noise transmitting UEs to transmit at least one noise signal, and control the one or more RISs to steer the at least one noise signal into the geographic zone of interest.

Abstract: Methods, systems, and devices for wireless communications are described. A target user equipment (UE) may receive an indication of a session key from an initiator UE in a sidelink communications system, from a network entity (e.g., a base station), or the like. In some cases, the target UE may also receive an indication of a nonce in a message of a PRS procedure. The target UE may select a positioning reference signal (PRS) sequence for the PRS procedure using the session key and optionally the nonce, such as by using a defined function at the target UE with the session key and the nonce as an input. Once the target UE selects the PRS sequence, the target UE may encode the PRS sequence and may transmit the PRS sequence to the initiator UE.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may receive navigation information associated with a user equipment (UE). The network node may transmit, based at least in part on the navigation information and a handover boundary, an indication for the UE to perform a handover between a terrestrial network (TN) and a non-terrestrial network (NTN). Numerous other aspects are described.

Abstract: Disclosed are techniques for wireless communication. In a first aspect, a network entity may calculate dimensions of a bounding box surrounding a vulnerable road user (VRU) in a vicinity of an approaching vehicle. The network entity may provide the dimensions of the bounding box to the approaching vehicle. In a second aspect, a vehicle on-board unit (OBU) may receive, from a network entity, dimensions of a bounding box surrounding a VRU in a vicinity of the vehicle. The OBU may use the bounding box for VRU safety calculations and collision avoidance.

Abstract: A method of wireless communication by a first user equipment (UE) includes requesting multi-static channel sensing estimates from a device to establish a communications link with a second UE, and receiving the multi-static channel sensing estimates from the device. The method further includes setting communication parameters based on the multi-static channel sensing estimates. The method still further includes communicating with the second UE over the communications link based on the communication parameters.

Abstract: A method for wireless communication at a first user equipment (UE) and related apparatus are provided. In the method, the first UE transmits, for a first network entity, an indication of a group identifier (ID) associated with communication between a group of UEs. The group of UEs includes the first UE and at least one second UE, and the group ID is associated with an identification of the at least one second UE by the first network entity via a second network entity. The first UE further communicates, based on the group ID, with the at least one second UE through a UE-Universal Mobile Telecommunications System (UMTS) connection via the first network entity and the second network entity. The method facilitates the connection among UEs served by different cells and improves the efficiency of wireless communication.