name: PRU
full_form: Positioning Reference Unit
context: A Positioning Reference Unit (PRU) at a known location can perform positioning measurements (e.g., RSTD, RSRP, UE Rx-Tx Time Difference measurements, DL-RSCPD, DL-RSCP, etc.) and report these measurements to a location server. In addition, the PRU can transmit SRS to enable TRPs to measure and report UL positioning measurements (e.g., RTOA, UL-AoA, gNB Rx-Tx Time Difference, UL-RSCP, etc.) from PRU at a known location. The PRU measurements can be compared by a location server with the measurements expected at the known PRU location to determine correction terms for other nearby target devices. The DL- and/or UL location measurements for other target devices can then be corrected based on the previously determined correction terms. PRU measurements may also be provided to the target device in the assistance data as described in clause 8.12. From a location server perspective, the PRU functionality is realized by a UE with known location.
description: A Positioning Reference Unit (PRU) is a type of device that can perform positioning measurements and report them to a location server. It is typically located at a known position and can transmit signals to enable other devices to measure their own location.
explanation: The context describes the PRU as a device that performs specific functions, such as making measurements and transmitting signals, which justifies its classification as a Device.
section_title: 5.4.5Positioning Reference Unit (PRU)
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