UE Positioning via PC5 Ranging and Core Network Coordination
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Solution Overview
Problem
Existing UE location methods via Uu measurement face challenges such as high power consumption, limited application scope, and inaccurate results in complex environments due to line of sight issues.
Innovation Solution
A method and apparatus for locating UE using a core network device that requests a ranging service from observer UEs, obtains ranging results, and transmits location requests to determine the position of the target UE, thereby enhancing location efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Uu measurement is used for UE location, then location can be obtained through base station measurements, but power consumption is high and location accuracy deteriorates in complex environments due to line of sight issues
Solution Approach 1:
The patent introduces observer UEs as intermediary devices that perform ranging measurements on the target UE. Instead of relying solely on base station Uu measurements, the system uses PC5 measurements from multiple observer UEs to determine location. This intermediary approach provides alternative measurement paths that work in complex environments where direct base station line of sight is blocked, thereby improving location accuracy while distributing the measurement burden across multiple devices rather than concentrating power consumption in one UE.
2Adaptability or versatility
If Uu measurement between UE and base stations is used, then location can be determined, but the application scope is limited and location efficiency is low
Solution Approach 1:
The patent enables observer UEs to perform ranging measurements on target UEs using PC5 interface, making the location system universal and applicable in diverse scenarios including vehicle-to-vehicle communication, drone location, and IoT device tracking. This multi-functional approach extends beyond traditional base station-dependent Uu measurement, allowing location services in areas without base station coverage or where base station measurements are unreliable, thereby expanding application scope while maintaining location efficiency through direct device-to-device ranging.
Data Source
AI summary
A method, apparatus and computer readable medium for locating a target User Equipment. The target UE is located by: receiving a position request transmitted by a position request device, where the position request includes a list of observer UEs and an allowed delay; requesting a ranging service from observer UE, where the ranging service is configured to enable observer UE to range on target UE; obtaining a ranging result transmitted by a current service access and mobility management function (AMF) corresponding to first observer UE, where the ranging result includes relative positions between the first observer UE and the target UE; transmitting a first location request to the current service AMF corresponding to the first observer UE; and obtaining position information, transmitted by the current service AMF corresponding to the first observer UE, of the target UE.