Abstract: Systems and techniques are described for sidelink synchronization source selection. For example, a method for wireless communications at a user equipment (UE) may include transmitting, from the UE to a target UE, a message including information associated with a first synchronization reference source associated with the UE. The method may include receiving, at the UE from the target UE in response to the message, a response message including an indication of whether the target UE can use the first synchronization reference source for sidelink positioning. The method can further include determining, at the UE based on the response message, whether to use the first synchronization reference source or a different synchronization reference source as a master synchronization reference source for the sidelink positioning.

Abstract: A V2X event-message dictionary and a binning function are received from a cloud server. Sensor data is compared to events specified in the V2X event-message dictionary to identify a best-fit event for the sensor data. A number of bins and a bin number for the event are computed using the binning function. A V2X message is transmitted including the number of bins and the bin number, thereby avoiding including the sensor data in the V2X message.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a first vehicle-to-everything (V2X)-capable vehicle receives, from a V2X-capable device, one or more V2X messages indicating an intended driving path of a second V2X-capable vehicle, and determines a viable driving trajectory for the first V2X-capable vehicle from a plurality of potential driving trajectories of the first V2X-capable vehicle based, at least in part, on the intended driving path of the second V2X-capable vehicle.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a vehicle-to-everything (V2X)-capable vehicle receives, from a V2X-capable device, one or more V2X messages indicating at least one detected event associated with a road on which the V2X-capable vehicle is travelling, and determines a viable driving trajectory for the V2X-capable vehicle from a plurality of potential driving trajectories of the V2X-capable vehicle based, at least in part, on the at least one detected event.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a first vehicle-to-everything (V2X)-capable vehicle receives, from a second V2X-capable vehicle, one or more V2X messages indicating a driving state of the second V2X-capable vehicle, wherein the driving state comprises a location of the second V2X-capable vehicle, a speed of the second V2X-capable vehicle, a heading of the second V2X vehicle, or any combination thereof, and determines a viable driving trajectory for the first V2X-capable vehicle from a plurality of potential driving trajectories of the first V2X-capable vehicle based, at least in part, on the driving state of the second V2X-capable vehicle.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a vehicle-to-everything (V2X)-capable vehicle receives, from a V2X-capable device, one or more V2X messages indicating at least a presence of one or more objects detected by perception sensors of the V2X-capable device, and determines a viable driving trajectory for the V2X-capable vehicle from a plurality of potential driving trajectories of the V2X-capable vehicle based, at least in part, on the presence of the one or more objects detected by the perception sensors of the V2X-capable device.

Abstract: Disclosed are techniques for wireless communication. In an aspect, a vehicle-to-everything (V2X)-capable vehicle receives, from a second V2X-capable vehicle, one or more V2X messages indicating an intended driving maneuver of the second V2X-capable vehicle, and determines a viable driving trajectory for the first V2X-capable vehicle from a plurality of potential driving trajectories of the first V2X-capable vehicle based, at least in part, on the intended driving maneuver of the second V2X-capable vehicle.

Abstract: Disclosed are techniques for performing wireless communication. In some aspects, a wireless communication device may determine that a prospective position of the wireless communication device is in a geographic area associated with a deficient global navigation satellite system (GNSS) signal. In some cases, the wireless communications device can transmit a sidelink synchronization signal to at least one user equipment (UE) device that is located within the geographic area associated with the deficient GNSS signal.

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, an example of a process includes detecting an object based on sensor data from at least one sensor of the network device. The process further includes receiving, by the network device, a vehicle-based message comprising message data related to the object. The process further includes comparing, by the network device, the sensor data and the message data and detecting, by the network device, malicious behavior based on the comparing.

Abstract: Systems and techniques are described for identifying and/or classifying capabilities associated with a wireless device. In some aspects, a process of the disclosed technology can include steps for receiving a first message comprising V2X capability information associated with a first wireless device, and transmitting via the at least one transceiver, a second message to the first wireless device, wherein the second message is associated with a periodicity based on the V2X capability information associated with the first wireless device.

Abstract: Systems and techniques are described for validating object detection. For example, an apparatus can receive a message from a wireless device. The message includes object data corresponding to one or more objects reported by the wireless device to be within a field-of-view of the apparatus. The apparatus can further determine, based on the object data, whether the wireless device has misreported at least one of the one or more objects.

Abstract: Method and apparatus for cooperative early threat detection. In some aspects, the apparatus detects one or more object data signals having data that interferes with wireless resources utilized in automated driving decisions. The apparatus transmits, to at least a second wireless device, a message indicating the one or more object data signals having the data that interferes with wireless resources utilized in automated driving decisions. The one or more object data signals may correspond to a misbehaving wireless device. The data of the misbehaving wireless device may comprise implausible data related to at least one characteristic of the misbehaving wireless device.

Abstract: Method and apparatus for cooperative early threat detection and avoidance in C-V2X. In one aspect, the apparatus detects a threat entity within a threat zone based on data signals received from the threat entity, wherein the threat entity obstructs wireless spectrum or resources utilized in cooperative or automated driving decisions. The apparatus transmits, to at least one second wireless device, a message indicating the threat entity within the threat zone.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, over a first frequency band, a first vehicle safety message indicating location information of a second wireless device. The UE may perform, with the second wireless device over a second frequency band that differs from the first frequency band, a beam sweeping procedure using a first subset of beams from a plurality of available beams to determine one or more beams of the first subset of beams to be used for communication with the second wireless device, each beam of the first subset of beams being oriented at least partially in a direction corresponding to the location information of the second wireless device. The UE may communicate, over the second frequency band, one or more messages with the second wireless device used the one or more beams of the first subset of beams.

Abstract: Systems and techniques are described for validating object detection. For example, an apparatus can obtain sensor data corresponding to a field-of-view of a vehicle. The apparatus can receive a message from a wireless device. The message includes an indication of at least one object in the field-of-view of the vehicle and a reported location of the at least one object. The apparatus can further determine, based on the sensor data and the message from the wireless device, whether the wireless device has misreported the at least one object.

Abstract: A method of wireless communication at a first V2X device is described herein. The method includes obtaining a message including a MAC header, an L1 source ID, and an L1 destination ID. The method includes decoding the MAC header to produce an L2 source ID associated with the message based on at least one of (1) the L1 destination ID of the message matching a first number of bits of an L2 source ID of the first V2X device or (2) the L1 source ID of the message matching a second number of bits of the L2 source ID of the first V2X device. The method includes outputting an indication of a MAC cloning attack based on the L2 source ID of the message matching the L2 source ID of the first V2X device.

Abstract: Various embodiments include methods and computing devices implementing such methods for detecting and responding to a non-acknowledgment message (NACK) attack. In some embodiments, a device vehicle processing system may perform an operation to determine whether a NACK attacker is present in response to a quantity of NACK messages received within a time interval exceeding a threshold quantity that is based on a vehicle communication environment proximate to the vehicle. The vehicle processing system may perform an operation to mitigate adverse effects of NACK messages received from the NACK attacker in response to determining that the NACK attacker is present.

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a computing device can transmit a number of fake inter-UE coordination (IUC) messages to reserve one or more resources for initial transmissions by the computing device. The computing device can receive one or more packets on at least one of the one or more resources. The computing device can further determine whether at least one of the one or more packets were transmitted by an attacker based on a jamming threshold.

Abstract: Systems and techniques are described for detecting one or more timing errors. For example, a system can receive, from a navigation system, navigation timestamp information at a first instance and a second instance. The system can determine a navigation system time difference based on the navigation timestamp information at the first instance and the second instance. The system can further receive, from a wireless device, network timestamp information at the first instance and the second instance. The system can determine a network time difference based on the network timestamp information at the first instance and the second instance. The system can further determine whether time reporting by the navigation system is correct based on the navigation system time difference and the network time difference.

Abstract: Various embodiments include methods and systems for performing misbehavior detection in a message retransmission. In various embodiments, a computing device may compare a first aspect of a first message to a second aspect of a second message that purports to be a retransmission of the first message, identify retransmission misbehavior in the second message based on the comparison, and take an action in response to identifying retransmission misbehavior in the second message.