Methods, systems, and devices for wireless communication are described. An initiator user equipment (UE) may broadcast, via a sidelink connection to a set of target UEs, a group sidelink communication request that includes a sidelink ranging service identifier. The group sidelink communication request may further include a broadcast identifier or a groupcast identifier. The initiator UE may establish, via the sidelink connection, a set of unicast sidelink sessions with the set of target UEs. some examples, the initiator UE may transmit, via the sidelink connection, a set of position reference signal requests via the set of unicast sidelink sessions to initiate a set of sidelink ranging sessions. The initiator UE may then receive, via the sidelink connection, a set of position reference signal responses from the set of target UEs during each of the plurality of sidelink ranging sessions.

Disclosed are a method and apparatus for transmitting, by a first terminal, a first positioning reference signal (PRS) for relative positioning in a communication system that supports sidelink communication that supports a sidelink according to various embodiments. Disclosed are a method comprising the steps of: receiving a second PRS requesting transmission of the first PRS from a second terminal; measuring an angle of arrival (AoA) on the basis of the second PRS; determining a first PRS pattern of the first PRS on the basis of the AoA; determining a time resource region in which the transmission of the first PRS is requested on the basis of a second PRS pattern of the second PRS; and transmitting the first PRS on the basis of the first PRS pattern and the determined time resource region, and an apparatus therefor.

A reference pose of an object in a coordinate system of a map of an area is determined. The reference pose is based on a three-dimensional (3D) reference model representing the object. A first pose of the object is determined as the object moves with respect to the coordinate system. The first pose is determined based on the reference pose and sensor data collected by the sensor at a first time. A second pose of the object is determined as the object continues to move with respect to the coordinate system. The second pose is determined based on the reference pose, the first pose, and sensor data collected by the sensor at a second time consecutive to the first time.

Systems, methods, and devices for authenticating vehicle-to-vehicle communication are disclosed. A method includes receiving sensor data from a first vehicle and receiving secondary sensor data from a second vehicle. The method includes extracting, based on the sensor data and the secondary sensor data, an authentication comprising one or more of: a proximity of the second vehicle to the first vehicle or a common object identified by the sensor data and the secondary sensor data. The method includes determining whether the authentication satisfies a trust threshold of the first vehicle.

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) receives one or more positioning reference signals from a first transmission-reception point (TRP) involved in a positioning session with the UE, detects whether or not there is a positioning bias event associated with the first TRP based on one or more parameters related to the one or more positioning reference signals, the positioning bias event affecting an accuracy of a location estimate of the UE, and transmits, in response to the detection that there is a positioning bias event, a report of the positioning bias event to a network node. Upon receiving the report, the network node performs one or more corrective actions to address the positioning bias event.

A searching games system comprised Bluetooth hidden object, mobile device and cloud server. Mobile device can locate the hidden object by Bluetooth low energy technology, plus GPS and algorithms. The location of hidden object is visualized on the mobile device. The hidden object information can also be shared through network to other players who want to join the searching game. In this manner, the game can be played in backyard, playground, in house or open area, e.g. park, like a championship.

Methods, systems, and devices for wireless communications are described. A first wireless device may receive situational information for a second wireless device over a first communication link between the first wireless device and the second wireless device and situational information for a third wireless device over a second communication link between the first wireless device and the third wireless device. The first wireless device may transmit message with guidance information to the second wireless device on behalf of the third wireless device and based on the second wireless device and the third wireless device having an event likelihood above a threshold. The event likelihood may be based on the situational information for the second wireless device and the situational information for the third wireless device.

An initiator UE may be configured to send one or more units of messages to one or more responder UEs. A unit of message may include a pre-PRS message, a PRS message and a post-PRS message. A responder UE may be configured to send one or more units of messages to the initiator UE. The pre-PRS message and the post-PRS message may be sent or received using a license spectrum. The PRS message may be sent or received using an unlicensed spectrum. The communication between the initiator UE and the responder UE may be initiated by the initiator UE identifying the responder UE from a plurality of UEs based on positioning properties of the responder UE. The positioning properties of the responder UE may include a direction, a velocity, a location confidence or a location of the responder UE, or a combination thereof.

The disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as long-term evolution (LTE). A method performed by a first terminal in a wireless communication system supporting sidelink is provided. The method comprises receiving from at least one second terminal location information of the second terminal and reliability information for the location information of the second terminal, selecting at least one second terminal to be used for location measurement of the first terminal based on the reliability information, and determining a location of the first terminal based location information of at least one second terminal selected based on the reliability information.

Techniques are provide for passive positioning of user equipment (UE) with sidelink assistance. An example method for passive positioning includes receiving a first positioning reference signal from a first station at a first time, receiving a second positioning reference signal from a second station at a second time, receiving positioning assistance data associated with positioning reference signals received by a proximate user equipment, determining a reference signal timing difference based at least in part on the first time and the second time, and determining a current location based at least in part on the reference signal timing difference and the positioning assistance data.