Positioning Reference Unit Association for 5G Calibration Correction
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G networks, face challenges in accurately locating wireless devices due to calibration errors and synchronization issues in base stations, leading to inefficiencies in positioning and increased latency.
Innovation Solution
The implementation of positioning reference units (PRUs) with known locations to perform measurements and report them to a location server, which calculates correction terms for internal delays and synchronization, enabling more accurate location determination of nearby devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference units (PRUs) are implemented to correct calibration errors and synchronization issues, then location determination accuracy is improved, but device complexity increases
Solution Approach 1:
Positioning reference units (PRUs) are introduced as intermediary devices with known locations that perform measurements and report to a location server. These PRUs act as mediators between base stations and the positioning system, providing reference measurements that enable correction of calibration errors and synchronization issues without requiring direct modification of the base station infrastructure.
Solution Approach 2:
The positioning function is segmented into separate components: PRUs perform measurements, location servers process data and calculate corrections, and base stations continue their primary function. This segmentation allows the positioning reference functionality to be added without complicating the base station design, as the correction computation is offloaded to the location server.
2Productivity
If PRUs perform measurements and report to location server, then positioning efficiency is enhanced, but signaling overhead increases
Solution Approach 1:
PRUs perform multiple functions: they serve as positioning reference points with known locations, perform measurements of positioning signals from base stations, and report these measurements to the location server. This multi-functionality consolidates positioning reference, measurement, and reporting capabilities into a single entity, reducing the need for separate signaling channels and overhead.
3Measurement precision
If correction terms for internal delays and synchronization are calculated, then measurement precision is improved, but processing time increases
Solution Approach 1:
The location server pre-calculates correction terms for internal delays and synchronization issues based on PRU measurements and base station characteristics. These correction terms are computed in advance and stored for application during positioning operations, avoiding the need for real-time calculation during actual positioning requests and thus reducing processing time while maintaining measurement precision.
Data Source
AI summary
Disclosed are techniques for supporting positioning. In an aspect, a positioning reference unit (PRU) sends and a location server receives an association request for the PRU. The location server authenticates the PRU and sends to the PRU an association accept indicating an acceptance of association and conditions for performing another association with the location server if the PRU is authenticated, or indicates a rejection of the association if the PRU is not authenticated. The association accept may include an identifier for the location server for the PRU for updating the association with the location server and/or identifiers for one or more additional location servers with which the PRU is to perform separate association. The location server may send to the PRU a disassociation request indicating the PRU is no longer associated and optionally an identifier for another location server with which the PRU should associate.