A configuration for dynamically updating the neighbor list sent to a UE based on the location of the UE and the location of one or more mobile relays. The apparatus receives first location information for one or more UEs. The apparatus receives second location information for one or more mobile relays. The apparatus determines a distance between the one or more UEs and each of the one or more mobile relays. The apparatus sends assistance information to at least one of the one or more UEs in an area, the assistance information identifying at least one mobile relay of the one or more mobile relays based on the determined distance between the one or more UEs and the at least one mobile relay.

Methods, systems, and devices for wireless communications (e.g., vehicle to everything systems) are described relating to an adaptive design of demodulation reference signals (DMRS) density based on user equipment (UE) velocity. A UE may send assistance information to a transmitting UE to help identify a DMRS pattern based on the relative speed between the two UEs. Also, the transmitter may determine the adaptive DMRS pattern based on its speed without information of the receiver's speed. The transmitter may indicate the adaptive DMRS pattern in control information to the receiver. A base station may receive assistance information, and the base station may determine the adaptive DMRS pattern to be used by the transmitting UE based on the received assistance information and then indicate the adaptive DMRS pattern to the transmitting UE. A UE may determine an adaptive DMRS pattern to use based on feedback from the receiving UE.

Provided are a method and device for providing vehicle-to-everything (V2X) services in next generation wireless access technology (New RAT). The method controls the sidelink HARQ feedback operation by a terminal. A PSSCH scheduled by a PSCCH including sidelink control information is received from a transmitting terminal. Wireless resources of a PSFCH including HARQ feedback information regarding the PSSCH are determined and allocated in one symbol. The PSFCH, allocated in the one symbol, are repeatedly transmitted to the transmitting terminal in two consecutive symbols.

A method for initial timing synchronization for a WTRU to communicate with a network includes receiving an in-channel narrowband synchronization sequence from the network to enable initial coarse timing synchronization, determining coarse timing offset and a range between a beam source of a network transmitter and the WTRU, selecting a wideband sequence for fine timing synchronization using the estimated range, transmitting the selected wideband sequence for fine timing synchronization during an uplink timing occasion, receiving from the network a transmission of the selected wideband sequence for fine timing synchronization, and establishing fine timing synchronization between the WTRU and the network using the selected sequence.

Methods and apparatus relating to the detection of one or more devices in zones, e.g., non-overlapping areas, are described. Individual device locations are made based on RSSI information. Whether a user is determined to be in a zone or not is determined based on location determinations corresponding to the device. Thresholds used to determine whether a device is to be considered as being within a zone differs depending on whether the device is newly detected in the zone or is already determined to be in the zone. In some embodiments it is easier to be determined to be in a zone than to be determined to have left a zone. A device may be determined to be in two non-overlapping zones at the same time thereby increasing the chance that devices in edge areas will be counted with regard to the number of devices for which resources should be provided.

Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) receives a request location information message from the network entity, the request location information message including one or more start measurement time parameters indicating a start time of a measurement period during which the UE is expected to perform one or more positioning measurements, and performs the one or more positioning measurements of one or more positioning reference signal (PRS) resources on a first positioning frequency layer during the measurement period, wherein a start of the measurement period is based on the one or more PRS resources, a reception time, and the one or more start measurement time parameters.

The position of a target user equipment (UE) is determined using an anchor UE and sidelink communication signals transmitted from the target UE to the anchor UE. During a positioning session, the anchor UE receives from the target UE sidelink communication signals, such as data signals and/or data related reference signals. The anchor UE performs positioning measurements for the sidelink communication signals from the target UE, such as timing based, angle based, or power based measurements. The anchor UE provides the positioning measurements of the sidelink communication signals to a location server, which may use the positioning measurements, along with a known position of the anchor UE to determine the position of the target UE.

Positioning of one or more user equipments (UEs) is performed using broadcast common sounding reference signals (SRS) resources for positioning. The common SRS that is broadcast by a UE is received and measured by one or more base stations and one or more other UEs. The other UEs may have known positions and may server as anchor nodes for positioning. The other UEs may have known positions and may serve as a positioning (anchor) node or may have unknown positions and may be jointly positioned with the target UE. During joint positioning, each of the other UEs may similarly broadcast a common set of SRS that is received and measured by the base stations and other UEs for positioning. An angular measurement of the SRS broadcast by one or more UEs may be measured and used to resolve mirror symmetry in positioning solutions.

A method includes receiving a ground-truth motion indication from a measurement device. The ground-truth motion indication is a time series of locations and a corresponding indication of a motion state at each location of the time series of locations. The method also includes receiving a time series of detected motion states based on wireless signals communicated through a space over a time period by a wireless communication network comprising a plurality of wireless communication devices. The detected motion states for a time interval within the time series are compared to the ground-truth motion indication for the time interval within the time series to generate a time series of consistency scores. The consistency scores are processed to produce an aggregate motion-detection capability score at each location. The method also includes providing, for display as a graphical representation of motion-detection capability within the space, the aggregate motion-detection capability at each location.

Establishing and refining beams in MIMO sessions can include detecting establishment of a communication session between a cell site and a user equipment. The communication session can be conducted using a multi-input multi-output beam that can be supported by a first portion of an antenna array, the first portion including two or more antenna array elements of the antenna array. Device data that relates to the user equipment can be obtained, where the device data can include movement data that can describe a movement of the user equipment. A beamforming command can be generated to include instructions that, when implemented by an entity associated with the cell site, can cause the cell site to refine the multi-input multi-output beam based on the device data. A refined multi-input multi-output beam can be supported by a second portion of the antenna array. The beamforming command can be provided to the cell site.