Various solutions for physical random access channel (PRACH) timing advance operation and PRACH configurations with respect to user equipment and network apparatus are described. An apparatus may determine a propagation delay between the apparatus and a network node. The apparatus may determine a pre-compensation timing margin. The apparatus may perform a timing advance pre-compensation according to the propagation delay and the pre-compensation timing margin. The apparatus may transmit an uplink signal by applying the timing advance pre-compensation.

A method, system and apparatus are disclosed. In one or more embodiments, a network node for a wireless communication system is provided. The network node includes processing circuitry configured to: send a wireless system clock and a network clock different from the wireless system clock where the network clock is adjustable based at least on the wireless system clock; determine one of a plurality of Propagation Delay (PD) compensation schemes for a first wireless device to implement based at least in part on at least one characteristic associated with the first wireless device; and indicate the one of the plurality of PD compensation schemes to the first wireless device for adjustment of the wireless system clock.

The UE may perform a measurement of downlink reference signals from a serving cell and at least one neighbor cell and skip one or more RRM measurements based on a comparison of the measurement for at least one round of measurements and a threshold value. The measurement of the downlink reference signals may include a measurement of a Doppler shift, a measurement of a positioning reference signal, or a measurement of a reception timing drift based on the downlink reference signals.

The present disclosure provides a method, system, and apparatus for processing parking and a vehicle controller, and relates to the field of intelligent transportation technology, specifically to the field of automated parking technology. The method is executed by a parking system deployed on a vehicle controller, the parking system including a perception module and other modules except the perception module; the perception module being deployed on a first operating system in the vehicle controller; and the other modules being deployed on a second operating system in the vehicle controller; the method includes: processing an image collected by an image collector through the perception module to obtain perception result data; and controlling a vehicle based on the perception result data obtained from the perception module by the other modules.

Methods and devices related to determining a propagation time of wireless transmissions between wireless communication devices are provided. A propagation time of wireless transmissions between a first wireless communication device and a second wireless communication device is determined. The determining is based on a roundtrip time of a wireless transmission exchange between the first wireless communication device and the second wireless communication device, a reply time of the wireless transmission exchange, and on the first time interval and the second time interval. The first time interval is a time interval between a first transmit event at the first wireless communication device and a second transmit event at the first wireless communication device. The second time interval is a time interval between a first receive event at the second wireless communication device and a second receive event at the second wireless communication device.

Disclosed are techniques for positioning a user equipment (UE). In aspects, a listening node determines a first time of arrival (ToA) at the listening node of a first radio frequency (RF) signal sent by a transmission-reception point (TRP) to the UE, determines a second ToA at the listening node of a second RF signal sent by the UE to the TRP, determines a time difference between the first ToA and the second ToA, and enables a positioning entity to estimate a location of the UE based on the time difference. The positioning entity calculates a distance between the listening node and the UE based on the time difference, a propagation time between the TRP and the listening node, a propagation time between the TRP and the UE, and a time difference between a ToA of the first RF signal at the UE and a transmission time of the second RF signal.

This disclosure describes methods and systems for configuring, requesting, performing, and reporting timing measurements of reference signals in a wireless network for purposes of time synchronization between various reference signal transmission-reception points of the wireless network. The reference signal timing measurements may be used to derive time offsets for performing time synchronization and calibration of the transmission-reception points that help improve geographical positioning of wireless devices in the wireless network.

The invention relates to a solution for determining an allowable round trip time for a communication between a base station and a terminal device served by the base station in an asynchronous communication system, At least some aspects of the solution relate to a method performed by a controller, the method comprises: determining round trip times of terminal devices served by the base station; selecting a maximum round trip time among the determined round trip times of the terminal devices served by the base station as the allowable round trip time; and delivering the selected allowable round trip time to the base station. The solution also relates to applying the determined round trip time by a base station and a terminal device as well as to a system comprising the mentioned entities and to computer program products.

According to an aspect, there is disclosed a method that includes aligning, by a radio access network node wirelessly connected to at least two parent nodes and to a child node, an uplink reception timing associated with the child node with a downlink reception timing associated with a parent node of the at least two parent nodes.

Disclosed are techniques for wireless positioning. In an aspect, a mobile device receives a timing synchronization offset parameter for a first cell of a set of cells, wherein the timing synchronization offset parameter represents a difference between a system frame number (SFN) initialization time of the first cell and an SFN initialization time of a reference cell, and processes the timing synchronization offset parameter for the first cell based on the SFN initialization time of the reference cell having changed.