Uplink Positioning Reference Signal Validity for Low-Power Reselection
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Solution Overview
Problem
Existing 5G NR positioning techniques for terminals in RRC inactive states result in high power consumption due to frequent interactions for reconfiguring uplink positioning reference signals during cell reselection, which is unsuitable for low power and high accuracy requirements.
Innovation Solution
Configuring uplink positioning reference signals with associated valid ranges and/or times to indicate the area and duration of signal validity, allowing terminals to continue using the configuration even after cell reselection, reducing the need for frequent network interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal reconfigures uplink positioning reference signals frequently during cell reselection, then positioning accuracy is maintained, but power consumption increases
Solution Approach 1:
The network device pre-configures the uplink positioning reference signal parameters including valid range and valid time in advance. The terminal receives this configuration beforehand and can autonomously determine whether to continue using the configuration based on its location and time, eliminating the need for frequent reconfiguration requests and responses, thus reducing power consumption while maintaining positioning accuracy.
Solution Approach 2:
The terminal is empowered to autonomously judge whether the pre-configured uplink positioning reference signal parameters are still valid by checking its current location against the valid range and current time against the valid time. This self-service mechanism eliminates the need for frequent network interactions during cell reselection, significantly reducing power consumption while ensuring positioning accuracy is maintained when the configuration is valid.
2Loss of energy
If the terminal maintains uplink positioning reference signal configuration after cell reselection, then network interactions are reduced, but positioning accuracy may deteriorate
Solution Approach 1:
The network device provides pre-configuration with valid range and valid time parameters that define the conditions under which the configuration remains applicable. This preliminary setup allows the terminal to maintain the configuration after cell reselection without frequent network interactions, while the predefined validity criteria ensure positioning accuracy is maintained within the specified bounds.
Solution Approach 2:
The configuration validity is made dynamic through the valid range and valid time parameters. The terminal can adaptively determine whether to continue using the configuration based on its current state (location and time), allowing the system to flexibly maintain power efficiency when the configuration is valid while ensuring positioning accuracy by detecting when reconfiguration is needed.
Data Source
AI summary
A method for configuring an uplink positioning reference signal, performed by a terminal, includes: receiving a message for configuring the uplink positioning reference signal. The message includes an uplink positioning reference signal configuration of the uplink positioning reference signal, and at least one of: a valid range or a valid time associated with the uplink positioning reference signal configuration; the valid range indicates an area range in which the uplink positioning reference signal configuration is valid, and the valid time indicates a period of time in which the uplink positioning reference signal configuration is valid.